:root{--bg:#0b1220;--card:#0f1a33;--muted:#9fb0d0;--text:#eaf0ff;--accent:#6ee7ff;--accent2:#a78bfa;--border:rgba(255,255,255,.10);--shadow:0 12px 40px rgba(0,0,0,.35);--radius:18px;--max:1100px}body.theme-midnight{--bg:#08090f;--card:#0f1118;--muted:#8b9dc3;--text:#e2e8f0;--accent:#60a5fa;--accent2:#818cf8;--border:rgba(255,255,255,.08);--shadow:0 12px 40px rgba(0,0,0,.5)}body.theme-forest{--bg:#0a1a14;--card:#0f2920;--muted:#8bbfa8;--text:#e0f5ec;--accent:#34d399;--accent2:#a3e635;--border:rgba(255,255,255,.08);--shadow:0 12px 40px rgba(0,0,0,.4)}body.theme-ember{--bg:#1a0f0a;--card:#261810;--muted:#c4a882;--text:#fef3e2;--accent:#fbbf24;--accent2:#f97316;--border:rgba(255,255,255,.08);--shadow:0 12px 40px rgba(0,0,0,.4)}body.theme-crimson{--bg:#140a0a;--card:#1f0f0f;--muted:#c48b8b;--text:#fce2e2;--accent:#ef4444;--accent2:#f97316;--border:rgba(255,255,255,.08);--shadow:0 12px 40px rgba(0,0,0,.4)}body.theme-sakura{--bg:#1a0f18;--card:#24101e;--muted:#c89ab8;--text:#fce4f0;--accent:#ec4899;--accent2:#f472b6;--border:rgba(255,255,255,.08);--shadow:0 12px 40px rgba(0,0,0,.4)}body.theme-neon{--bg:#0d0a1a;--card:#120f22;--muted:#a78bfa;--text:#ede9fe;--accent:#a855f7;--accent2:#e879f9;--border:rgba(255,255,255,.08);--shadow:0 12px 40px rgba(0,0,0,.5)}body.theme-light{--bg:#f0f2f5;--card:#ffffff;--muted:#475569;--text:#1a1a2e;--accent:#3b82f6;--accent2:#8b5cf6;--border:rgba(0,0,0,.12);--shadow:0 12px 40px rgba(0,0,0,.08)}*{box-sizing:border-box}body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial;background:radial-gradient(900px 420px at 15% 10%,rgba(110,231,255,.12),transparent 60%),radial-gradient(700px 420px at 85% 15%,rgba(167,139,250,.14),transparent 55%),linear-gradient(180deg,#070b14,var(--bg));color:var(--text);line-height:1.5}body.theme-midnight{background:radial-gradient(900px 420px at 15% 10%,rgba(96,165,250,.08),transparent 60%),radial-gradient(700px 420px at 85% 15%,rgba(129,140,248,.08),transparent 55%),linear-gradient(180deg,#050508,var(--bg))}body.theme-forest{background:radial-gradient(900px 420px at 15% 10%,rgba(52,211,153,.1),transparent 60%),radial-gradient(700px 420px at 85% 15%,rgba(163,230,53,.08),transparent 55%),linear-gradient(180deg,#060f0a,var(--bg))}body.theme-ember{background:radial-gradient(900px 420px at 15% 10%,rgba(251,191,36,.1),transparent 60%),radial-gradient(700px 420px at 85% 15%,rgba(249,115,22,.08),transparent 55%),linear-gradient(180deg,#0f0804,var(--bg))}body.theme-light{background:var(--bg)}body.theme-light .brand-icon{background:linear-gradient(135deg,#0a7c8e,#6b5ce7);color:#fff}body.theme-light input,body.theme-light select,body.theme-light textarea{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.12);color:var(--text)}body.theme-light .card,body.theme-light .content-card,body.theme-light .tier-card{background:var(--card);border-color:var(--border)}body.theme-light .btn.primary{color:#fff}body.theme-light .cat-btn,body.theme-light .diff-btn,body.theme-light .exam-btn,body.theme-light .length-btn,body.theme-light .theme-btn{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.12)}body.theme-light .quiz-option{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.1)}body.theme-light .diff-btn.selected,body.theme-light .exam-btn.selected,body.theme-light .length-btn.selected,body.theme-light .theme-btn.selected{background:rgba(59,130,246,.15);border-color:var(--accent);box-shadow:0 0 12px rgba(59,130,246,.2)}body.theme-light .diff-btn:hover,body.theme-light .exam-btn:hover,body.theme-light .length-btn:hover,body.theme-light .theme-btn:hover{background:rgba(59,130,246,.08);border-color:rgba(59,130,246,.3)}body.theme-light .cat-btn.active{background:rgba(59,130,246,.15);border-color:var(--accent)}body.theme-light .quiz-option:hover:not(:disabled){background:rgba(59,130,246,.08);border-color:rgba(59,130,246,.3)}body.theme-light .review-cell,body.theme-light .test-nav-cell,body.theme-light .time-btn{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.12)}body.theme-light .time-btn.selected{background:rgba(59,130,246,.15);border-color:var(--accent)}body.theme-light .toggle-slider{background:rgba(0,0,0,.15)}body.theme-light .nav{background:rgba(240,242,245,.95)}body.theme-light .links a{color:rgba(26,26,46,.7)}body.theme-light .links a.active{color:var(--accent);background:rgba(59,130,246,.08)}body.theme-light .menu-toggle{border-color:rgba(0,0,0,.12);background:rgba(0,0,0,.04)}body.theme-light .menu-toggle span{background:rgba(26,26,46,.8)}body.theme-light .links{background:rgba(240,242,245,.97)}a{color:inherit;text-decoration:none}.wrap{max-width:var(--max);margin:0 auto;padding:24px;position:relative;z-index:1}.nav{position:sticky;top:0;z-index:100;background:rgba(11,18,32,.92);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}.nav .wrap{display:flex;align-items:center;gap:16px;position:relative}.nav-secondary{background:rgba(11,18,32,.6);border-bottom:1px solid rgba(255,255,255,.04);position:relative;z-index:99}.nav-secondary .wrap{display:flex;justify-content:center;align-items:center;position:relative}.nav-secondary-controls{display:flex;align-items:center;gap:10px;position:absolute;right:0;top:50%;transform:translateY(-50%);z-index:150}.nav-appearance-dropdown{position:relative}.nav-appearance-btn{display:flex;align-items:center;gap:5px;padding:4px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);cursor:pointer;font-family:inherit;font-weight:600;transition:color .2s,background .2s,border-color .2s}.nav-appearance-btn:hover{color:var(--text);background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.15)}.nav-appearance-panel{display:none;position:absolute;right:0;top:calc(100% + 6px);background:var(--card);border:1px solid var(--border);border-radius:12px;padding:12px 14px;min-width:220px;z-index:200;box-shadow:0 8px 24px rgba(0,0,0,.4)}.nav-appearance-panel.open{display:block}.nav-appearance-label{display:block;color:var(--muted);margin-bottom:6px}.nav-help-btn{width:26px;height:26px;border-radius:50%;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);cursor:pointer;font-size:13px;font-weight:700;font-family:inherit;display:flex;align-items:center;justify-content:center;transition:background .2s,color .2s;order:12;flex-shrink:0}.nav-help-btn:hover{background:rgba(255,255,255,.1);color:var(--text)}body.theme-light .nav-help-btn{background:rgba(0,0,0,.04)}body.theme-light .nav-help-btn:hover{background:rgba(0,0,0,.08)}.tour-overlay{position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:998;pointer-events:none}.tour-tooltip{position:absolute;z-index:999;width:320px;max-width:90vw;background:var(--card);border:1px solid var(--accent);border-radius:14px;padding:16px 18px;box-shadow:0 8px 32px rgba(0,0,0,.4);pointer-events:auto}.tour-step-num{font-size:11px;color:var(--muted);margin-bottom:4px}.tour-title{font-size:16px;font-weight:800;margin-bottom:6px}.tour-text{font-size:13px;color:var(--muted);line-height:1.5;margin-bottom:12px}.tour-actions{display:flex;justify-content:space-between;align-items:center}.tour-skip{display:block;text-align:center;margin-top:8px;color:var(--muted)}.tour-highlight{position:relative;z-index:999;box-shadow:0 0 0 4px var(--accent),0 0 20px rgba(110,231,255,.3);border-radius:8px}body.theme-light .tour-tooltip{border-color:var(--accent);box-shadow:0 8px 32px rgba(0,0,0,.15)}body.theme-light .tour-highlight{box-shadow:0 0 0 4px var(--accent),0 0 20px rgba(59,130,246,.2)}.settings-section{padding:4px 0}.settings-divider{height:1px;background:var(--border);margin:8px 0}.settings-toggle-row{display:flex;align-items:center;justify-content:space-between;gap:8px;cursor:pointer;margin-top:8px}.settings-toggle-row input{display:none}.settings-toggle-row .nav-toggle-slider{flex-shrink:0}.settings-toggle-row input:checked+.nav-toggle-slider{background:var(--accent)}.settings-toggle-row input:checked+.nav-toggle-slider::after{transform:translateX(12px);background:#fff}.settings-icon-row{display:flex;gap:8px}.settings-icon-btn{display:flex;flex-direction:column;align-items:center;gap:3px;padding:8px 14px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);cursor:pointer;font-family:inherit;transition:background .2s,color .2s,border-color .2s}.settings-icon-btn:hover{color:var(--text);background:rgba(255,255,255,.08)}.settings-icon-btn.active{color:var(--accent);border-color:var(--accent);background:rgba(110,231,255,.1)}body.theme-light .settings-icon-btn{background:rgba(0,0,0,.03)}body.theme-light .settings-icon-btn:hover{background:rgba(0,0,0,.06)}body.theme-light .settings-icon-btn.active{color:var(--accent);border-color:var(--accent);background:rgba(59,130,246,.1)}.nav-theme-picker{display:flex;gap:6px;margin-bottom:4px}.nav-theme-btn{width:28px;height:28px;border-radius:50%;border:2px solid transparent;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;transition:border-color .2s,transform .15s;background:0 0}.nav-theme-btn:hover{transform:scale(1.15)}.nav-theme-btn.active{border-color:var(--text)}.nav-theme-btn .theme-swatch{width:22px;height:22px;border-radius:50%}.nav-text-size-row{display:flex;align-items:center;gap:6px;margin-bottom:4px}.nav-text-size-btn{width:30px;height:28px;border-radius:6px;border:1px solid var(--border);background:rgba(255,255,255,.06);color:var(--text);cursor:pointer;font-size:12px;font-weight:700;font-family:inherit;display:flex;align-items:center;justify-content:center;transition:background .2s,border-color .2s}.nav-text-size-btn:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.2)}.nav-text-size-label{min-width:36px;text-align:center;font-weight:600}.nav-text-size-reset{margin-left:auto}body.theme-light .nav-text-size-btn{background:rgba(0,0,0,.04)}body.theme-light .nav-text-size-btn:hover{background:rgba(0,0,0,.08)}.nav-language-picker{display:flex;flex-wrap:wrap;gap:4px;max-height:150px;overflow-y:auto}.nav-lang-btn{padding:4px 8px;border-radius:6px;border:1px solid transparent;background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:11px;font-family:inherit;white-space:nowrap;transition:background .2s,border-color .2s}.nav-lang-btn:hover{background:rgba(255,255,255,.1)}.nav-lang-btn.active{border-color:var(--accent);background:rgba(110,231,255,.1);color:var(--accent)}body.theme-light .nav-lang-btn{background:rgba(0,0,0,.03)}body.theme-light .nav-lang-btn:hover{background:rgba(0,0,0,.06)}body.theme-light .nav-lang-btn.active{background:rgba(59,130,246,.1);border-color:var(--accent)}.nav-atmo-picker{display:flex;gap:4px;flex-wrap:wrap;margin-bottom:10px}.nav-atmo-btn{background:0 0;border:1px solid transparent;cursor:pointer;font-size:16px;padding:5px 7px;border-radius:8px;opacity:.5;transition:opacity .2s,background .2s,border-color .2s;line-height:1}.nav-atmo-btn:hover{opacity:.8;background:rgba(255,255,255,.06)}.nav-atmo-btn.active{opacity:1;background:rgba(110,231,255,.12);border-color:rgba(110,231,255,.3)}body.theme-light .nav-appearance-btn{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.12)}body.theme-light .nav-appearance-btn:hover{background:rgba(0,0,0,.06)}body.theme-light .nav-appearance-panel{background:var(--card);border-color:rgba(0,0,0,.1);box-shadow:0 8px 24px rgba(0,0,0,.12)}body.theme-light .nav-atmo-btn{opacity:.7;border-color:rgba(0,0,0,.08);background:rgba(0,0,0,.02)}body.theme-light .nav-atmo-btn:hover{opacity:1;background:rgba(0,0,0,.06);border-color:rgba(0,0,0,.15)}body.theme-light .nav-atmo-btn.active{opacity:1;background:rgba(59,130,246,.1);border-color:rgba(59,130,246,.4)}body.theme-light .nav-appearance-label{color:#94a3b8}body.theme-light .settings-divider{background:rgba(0,0,0,.08)}body.theme-light .settings-toggle-row span{color:#64748b}body.theme-light .nav-theme-btn.active{border-color:#1e293b}.nav-secondary-links{display:flex;gap:4px;overflow-x:auto;padding:4px 0;margin:0 220px 0 130px}.nav-secondary-links a{font-size:12px;font-weight:600;color:var(--muted);text-decoration:none;padding:5px 12px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}.nav-secondary-links a:hover{color:var(--text);background:rgba(255,255,255,.06)}.nav-secondary-links a.active{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}body.theme-light .nav-secondary{background:rgba(255,255,255,.6)}body.theme-light .nav-secondary-links a:hover{background:rgba(0,0,0,.04)}body.theme-light .nav-secondary-links a.active{color:var(--accent);background:color-mix(in srgb,var(--accent) 12%,transparent)}.brand{display:flex;gap:10px;align-items:center;font-weight:800;text-decoration:none;margin-left:16px}.brand-icon{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:900;font-size:16px;letter-spacing:-.5px;flex-shrink:0}.brand-text{font-size:1.15rem;font-weight:800;color:var(--text);letter-spacing:-.3px}.brand-accent{background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.links{display:flex;gap:4px;flex:1;justify-content:flex-end;margin-right:12px}.links a{color:rgba(234,240,255,.78);font-weight:700;padding:8px 14px;border-radius:10px;transition:background .2s ease,color .2s ease;font-size:14px}.links a:hover{background:rgba(255,255,255,.08);color:var(--text)}.links a.active{color:var(--accent);background:rgba(110,231,255,.08)}.nav-cta{font-size:13px;padding:10px 16px;order:8}.energy-bar{display:flex;align-items:center;gap:6px;order:10}.energy-bar-icon{font-size:14px}.energy-bar-track{width:60px;height:8px;border-radius:4px;background:rgba(255,255,255,.08);overflow:hidden}.energy-bar-fill{height:100%;border-radius:4px;background:linear-gradient(90deg,#34d399,#6ee7b7);transition:width .4s ease}.energy-bar-fill.energy-mid{background:linear-gradient(90deg,#fbbf24,#fcd34d)}.energy-bar-fill.energy-low{background:linear-gradient(90deg,#f87171,#fca5a5)}.energy-bar-label{font-size:11px;font-weight:700;color:var(--muted);white-space:nowrap}body.theme-light .energy-bar-track{background:rgba(0,0,0,.08)}.menu-toggle{display:none;width:44px;height:44px;border-radius:12px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);cursor:pointer;padding:10px;flex-direction:column;align-items:center;justify-content:center;gap:4px}.menu-toggle span{display:block;width:22px;height:2px;background:rgba(234,240,255,.92);border-radius:2px;transition:all .3s ease}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 16px;border-radius:14px;font-weight:800;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:var(--text);cursor:pointer}.btn.primary{border:none;background:linear-gradient(135deg,rgba(110,231,255,.95),rgba(167,139,250,.95));color:#06101b;box-shadow:0 0 20px rgba(110,231,255,.3);transition:all .3s ease}.btn.primary:hover{box-shadow:0 0 30px rgba(110,231,255,.5),0 0 60px rgba(110,231,255,.25);transform:translateY(-1px)}.btn.primary:active{transform:translateY(0)}.hero-logo-wrap{text-align:center;margin-bottom:28px;position:relative;z-index:1}.hero-logo{max-width:420px;width:100%;height:auto;border-radius:16px;filter:drop-shadow(0 4px 24px rgba(110,231,255,.2))}@media(max-width:600px){.hero-logo{max-width:300px}.hero-logo-wrap{margin-bottom:20px}}.hero{padding:44px 0;position:relative;overflow:hidden;transition:max-height .4s ease,opacity .3s ease,padding .4s ease}.dash-welcome{display:flex;align-items:center;gap:16px;margin-bottom:20px}.dash-mascot{width:144px;height:144px;border-radius:50%;object-fit:cover;object-position:center 30%}.dash-welcome h2{margin:0;font-size:22px}.dash-ask-byte-btn{margin-top:8px}.dash-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.dash-card{text-decoration:none;color:var(--text);text-align:center;padding:20px 12px;transition:border-color .3s,transform .2s}.dash-card:hover{border-color:rgba(110,231,255,.25);transform:translateY(-2px)}.dash-card-icon{display:block;font-size:28px;margin-bottom:6px}.dash-card-label{font-size:13px;font-weight:700}@media(max-width:600px){.dash-grid{grid-template-columns:repeat(2,1fr)}.dash-mascot{width:100px;height:100px}.dash-welcome h2{font-size:18px}}.hero-collapsed{max-height:0!important;opacity:0;padding:0;overflow:hidden;pointer-events:none}.hero::before{content:'';position:absolute;inset:0;pointer-events:none;background:radial-gradient(800px 500px at 50% 0,rgba(110,231,255,.08),transparent 50%),radial-gradient(600px 600px at 30% 80%,rgba(167,139,250,.06),transparent 60%);animation:electricPulse 4s ease-in-out infinite}.hero .grid{position:relative;z-index:1}.hero .card{position:relative;display:flex;flex-direction:column;padding:24px 20px}.hero .card:first-child{box-shadow:0 0 30px rgba(110,231,255,.15),var(--shadow);min-height:0;justify-content:flex-start}.hero h1{background:linear-gradient(135deg,var(--text),rgba(110,231,255,.9));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:electricGlow 3s ease-in-out infinite}.hero-pricing-section{margin-top:auto;padding-top:12px;border-top:1px solid var(--border)}.hero-pricing-section h3{font-size:14px;margin-bottom:8px}.hero-tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.hero-exams-card{display:flex;flex-direction:column}.hero-exams-card>h3{margin-bottom:10px}.hero-exam-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}.hero-exam-item{display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 8px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.03);text-decoration:none;color:var(--text);position:relative;transition:border-color .2s,transform .2s,background .2s}.hero-exam-item:hover{border-color:var(--accent);background:rgba(110,231,255,.05);transform:translateY(-2px)}.hero-exam-icon{font-size:24px;line-height:1}.hero-exam-name{font-size:13px;font-weight:700;margin-top:2px}.hero-exam-code{font-size:10px;color:var(--muted);font-weight:600;letter-spacing:.5px}.hero-exam-future{opacity:.6;border-style:dashed;cursor:default}.hero-exam-future:hover{transform:none;border-color:var(--border);background:rgba(255,255,255,.03)}.hero-exam-badge{position:absolute;top:4px;right:4px;font-size:8px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;padding:2px 6px;border-radius:4px;background:rgba(110,231,255,.15);color:var(--accent)}body.theme-light .hero-exam-item{background:rgba(0,0,0,.02)}body.theme-light .hero-exam-item:hover{background:rgba(59,130,246,.05);border-color:var(--accent)}body.theme-light .hero-exam-badge{background:rgba(59,130,246,.1)}.hero-tier{display:flex;flex-direction:column;align-items:center;gap:2px;padding:12px 8px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.03);text-decoration:none;color:var(--text);position:relative;overflow:hidden;transition:border-color .3s,transform .2s}.hero-tier:hover{border-color:rgba(110,231,255,.3);transform:translateY(-2px)}.hero-tier-popular{border-color:rgba(110,231,255,.25)}.hero-tier-price{font-size:22px;font-weight:800;color:var(--accent)}.hero-tier-name{font-size:11px;color:var(--muted);font-weight:600}.hero-tier-badge{font-size:9px;font-weight:700;color:gold;text-transform:uppercase;letter-spacing:.5px}.hero-tier-note{font-size:9px;font-weight:600;color:gold;margin-top:2px}.shimmer-card::after{content:"";position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,.06),transparent);animation:shimmer 3s ease-in-out infinite}@keyframes shimmer{0%{left:-100%}50%{left:150%}100%{left:150%}}body.theme-light .shimmer-card::after{background:linear-gradient(90deg,transparent,rgba(255,255,255,.3),transparent)}.hero-tagline{color:var(--muted);margin:4px 0 0;font-size:15px}.hero-mascot-full-wrap{text-align:center;margin-top:auto;padding:20px 0 8px;flex:1;display:flex;align-items:center;justify-content:center}.hero-mascot-full{max-width:280px;width:100%;border-radius:16px;border:2px solid rgba(110,231,255,.15)}.hero-features{list-style:none;padding:0;margin:0 0 8px}.hero-features li{font-size:14px;color:var(--muted);padding:4px 0;border-bottom:1px solid rgba(255,255,255,.04)}.hero-features li:last-child{border-bottom:none}.hero-features strong{color:var(--text)}.hero-cta-row{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap;justify-content:center}.hero-cta-row .btn{flex:1;max-width:280px;text-align:center;padding:12px 24px;font-size:15px}@media(max-width:600px){.hero-mascot-full{max-width:200px}}.hero-btn-outline{background:0 0;border:1px solid var(--accent);color:var(--accent)}.hero-btn-outline:hover{background:rgba(110,231,255,.08)}.card-divider-link{display:block;text-decoration:none;color:inherit;border-radius:8px;transition:background .2s}.card-divider-link:hover{background:rgba(110,231,255,.06)}.card-divider-cta{display:block;text-align:center;margin-top:6px;color:var(--accent);font-weight:700}@keyframes electricPulse{0%,100%{opacity:.8}50%{opacity:1}}@keyframes electricGlow{0%,100%{filter:drop-shadow(0 0 8px rgba(110,231,255,.3));text-shadow:none}50%{filter:drop-shadow(0 0 16px rgba(110,231,255,.5));text-shadow:0 0 10px rgba(110,231,255,.4)}}.grid{display:grid;gap:18px;grid-template-columns:1.2fr .8fr}.card{background:rgba(15,26,51,.95);border:1px solid var(--border);border-radius:var(--radius);padding:20px;transition:border-color .3s,box-shadow .3s}.card:hover{border-color:rgba(110,231,255,.15);box-shadow:0 0 20px rgba(110,231,255,.04)}body.theme-light .card:hover{border-color:rgba(59,130,246,.15);box-shadow:0 0 20px rgba(59,130,246,.04)}h1{font-size:42px;margin:0 0 10px}h2{font-size:22px;margin:0 0 12px}h3{margin:0 0 8px}.sub{color:var(--muted);margin-bottom:16px}.small{font-size:13px;color:var(--muted)}.section{padding:24px 0}.price{display:flex;justify-content:space-between;align-items:baseline;gap:12px;padding:14px;border-radius:14px;background:rgba(255,255,255,.05);margin-top:10px}.price strong{font-weight:800}.price .small{white-space:nowrap;margin-left:auto;text-align:right}input{width:100%;padding:12px 12px;border-radius:14px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:var(--text);outline:0;font-size:14px}.footer{padding:40px 0 30px;color:var(--muted);font-size:13px;border-top:1px solid var(--border);margin-top:40px}.footer-inner{max-width:var(--max);margin:0 auto;padding:0 24px;text-align:center}.footer-links{display:flex;justify-content:center;gap:20px;margin-bottom:16px}.footer-links a{color:var(--muted);font-weight:600;transition:color .2s}.footer-links a:hover{color:var(--text)}.announcement-bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:10px 16px;margin:0 auto 0;max-width:var(--max-width,900px);border:1px solid var(--accent);border-radius:12px;margin-top:12px;font-size:13px;font-weight:600;color:var(--text);background:rgba(110,231,255,.06)}.announcement-dismiss{background:0 0;border:none;color:var(--muted);font-size:18px;cursor:pointer;padding:0 4px;flex-shrink:0}.announcement-dismiss:hover{color:var(--text)}.study-tip-bar{display:flex;align-items:center;gap:10px;padding:10px 16px;margin:0 auto;max-width:var(--max-width,900px);background:rgba(110,231,255,.06);border:1px solid rgba(110,231,255,.15);border-radius:12px;margin-top:12px;font-size:13px;color:var(--text);animation:tipSlideIn .4s ease}.study-tip-icon{font-size:20px;flex-shrink:0}.study-tip-text{flex:1;line-height:1.4}.study-tip-link{flex-shrink:0;font-size:12px;font-weight:700;color:var(--accent);text-decoration:none;white-space:nowrap;padding:4px 10px;border:1px solid var(--accent);border-radius:8px;transition:background .2s,color .2s}.study-tip-link:hover{background:var(--accent);color:#000}.study-tip-dismiss{background:0 0;border:none;color:var(--muted);font-size:18px;cursor:pointer;padding:0 4px;flex-shrink:0;line-height:1}.study-tip-dismiss:hover{color:var(--text)}body.theme-light .study-tip-bar{background:rgba(59,130,246,.05);border-color:rgba(59,130,246,.15)}@keyframes tipSlideIn{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}@media(max-width:600px){.study-tip-bar{flex-wrap:wrap;gap:8px}.study-tip-link{width:100%;text-align:center}}.page-header{text-align:center;padding:48px 0 24px;position:relative}.page-header::after{content:'';display:block;width:60px;height:3px;margin:16px auto 0;border-radius:2px;background:linear-gradient(90deg,var(--accent),var(--accent2))}.page-header h1{font-size:36px;margin-bottom:8px}.page-header p{color:var(--muted);max-width:520px;margin:0 auto}.content-card{max-width:720px;margin:0 auto 20px}.content-card h3{color:var(--accent);margin-top:20px}.content-card li,.content-card p{color:var(--muted);line-height:1.7}.content-card ul{padding-left:20px}.contact-form{max-width:520px;margin:0 auto;display:flex;flex-direction:column;gap:14px}.contact-form textarea{width:100%;padding:12px;border-radius:14px;border:1px solid rgba(255,255,255,.14);background:rgba(255,255,255,.06);color:var(--text);outline:0;font-size:14px;font-family:inherit;resize:vertical;min-height:140px}.contact-form .btn{align-self:flex-start}.feedback-category{display:flex;gap:10px;flex-wrap:wrap}.cat-btn{padding:10px 20px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:14px;transition:background .2s,border-color .2s}.cat-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.cat-btn.active{background:rgba(110,231,255,.12);border-color:var(--accent)}.char-count{font-size:12px;color:var(--muted);margin-top:-8px}.feedback-success{color:#6ee7b7;background:rgba(110,231,183,.08);border:1px solid rgba(110,231,183,.2);border-radius:12px;padding:12px 16px;font-size:14px}.pricing-section{max-width:820px;margin:0 auto}.pricing-section .tier-grid{max-width:720px;margin:0 auto 30px}.pricing-free-section{text-align:center;margin-top:40px;padding-top:32px;border-top:1px solid var(--border)}.pricing-free-section h3{color:var(--muted);font-size:16px;font-weight:600;margin:0 0 16px}.pricing-free-options{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.pricing-free-card{background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:var(--radius);padding:20px 24px;max-width:260px;text-align:center}.pricing-free-card p{margin:8px 0 12px;color:var(--muted)}.tier-card ul{text-align:left;padding-left:16px;color:var(--muted);margin:8px 0}@media(max-width:900px){.grid{grid-template-columns:1fr}}.mobile-nav-cta,.mobile-nav-divider,.mobile-nav-secondary{display:none}@media (max-width:700px){.wrap{padding:16px}h1{font-size:34px;line-height:1.15}.hero h3{font-size:18px;margin-top:6px}.hero-cta-row{flex-direction:column}.hero .btn{width:100%}.price{flex-wrap:wrap}.price .small{white-space:normal}.menu-toggle{display:flex}.links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;background:rgba(11,18,32,.97);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid var(--border);padding:12px 24px;gap:2px}.links a{padding:12px 14px;font-size:16px}body.menu-open .links{display:flex}body.menu-open .menu-toggle span:first-child{transform:translateY(6px) rotate(45deg)}body.menu-open .menu-toggle span:nth-child(2){opacity:0}body.menu-open .menu-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}.nav-cta{display:none}.nav-secondary{display:none}.mobile-nav-divider{display:block;height:1px;background:var(--border);margin:4px 14px}.mobile-nav-secondary{display:block;font-size:14px;color:var(--muted);padding:10px 14px}.mobile-nav-secondary.active{color:var(--accent)}.mobile-nav-cta{display:block;text-align:center;margin:8px 14px 4px;padding:10px;border-radius:10px;font-weight:700;font-size:14px;background:var(--accent);color:#000;text-decoration:none}.energy-bar .energy-bar-track{width:40px}.energy-bar-label{font-size:10px}.page-header{padding:32px 0 16px}.page-header h1{font-size:28px}}.quiz-card{max-width:860px;margin:0 auto}.hidden{display:none!important}.mt-4{margin-top:4px}.mt-8{margin-top:8px}.mt-12{margin-top:12px}.mt-16{margin-top:16px}.mt-20{margin-top:20px}.mt-24{margin-top:24px}.mt-32{margin-top:32px}.text-center{text-align:center}.text-muted{color:var(--muted)}.text-error{color:#ff6b6b}.content-narrow{max-width:720px;margin:0 auto}.flex-center-wrap{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}.flex-gap-12{display:flex;gap:12px}.card-divider{margin-top:20px;border-top:1px solid var(--border);padding-top:16px}.link-accent{color:var(--accent)}.form-label-block{display:block;margin-top:16px}.form-hint{margin-top:4px;color:var(--muted)}.warning-note{margin-top:8px;color:var(--warning)}.room-code-input{text-transform:uppercase;letter-spacing:3px;text-align:center;font-weight:700}.score-ring-animated{transition:stroke-dashoffset 1s ease}.btn-sm{font-size:12px;padding:6px 12px}.card-table{overflow-x:auto;padding:0}.pagination-row{display:flex;justify-content:space-between;margin-top:12px}.error-header{padding:80px 0 40px}.error-code{font-size:72px;margin-bottom:16px}.error-subtitle{color:var(--muted);font-weight:400}.quiz-collapse{background:rgba(255,255,255,.03);border:1px solid var(--border);border-radius:12px;padding:0;margin-top:16px}.quiz-collapse-header{display:flex;align-items:center;justify-content:space-between;padding:14px 16px;cursor:pointer;-webkit-user-select:none;user-select:none;list-style:none}.quiz-collapse-header::-webkit-details-marker{display:none}.quiz-collapse-header h3{margin:0;font-size:15px;display:flex;align-items:center;gap:8px}.quiz-collapse-header h3::before{content:"\25B8";font-size:12px;color:var(--muted);transition:transform .2s ease;display:inline-block}.quiz-collapse[open]>.quiz-collapse-header h3::before{transform:rotate(90deg)}.quiz-collapse[open]{padding-bottom:16px}.quiz-collapse[open]>.quiz-collapse-header{padding-bottom:12px}.mastery-dash-exam{font-size:12px;color:var(--accent);font-weight:700}.mastery-dash-bars{display:flex;flex-direction:column;gap:6px;padding:0 16px}.mastery-dash-row{display:flex;align-items:center;gap:8px}.mastery-dash-label{width:110px;font-size:12px;font-weight:600;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex-shrink:0}.mastery-dash-row:first-child .mastery-dash-label{color:var(--text);font-weight:800}.mastery-dash-bar-wrap{flex:1;height:8px;background:rgba(255,255,255,.06);border-radius:4px;overflow:hidden}.mastery-dash-bar{height:100%;border-radius:4px;transition:width .4s ease}.mastery-bar-great{background:linear-gradient(90deg,#2ecc71,#27ae60)}.mastery-bar-good{background:linear-gradient(90deg,#6ee7ff,#3498db)}.mastery-bar-okay{background:linear-gradient(90deg,#f39c12,#e67e22)}.mastery-bar-weak{background:linear-gradient(90deg,#e74c3c,#c0392b)}.mastery-dash-pct{width:36px;text-align:right;font-size:12px;font-weight:700;color:var(--text);flex-shrink:0}.mastery-dash-footer{margin-top:10px;padding:0 16px}.mastery-dash-row:first-child{padding-bottom:6px;margin-bottom:2px;border-bottom:1px solid rgba(255,255,255,.06)}.exam-select{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:12px}.exam-btn{display:flex;flex-direction:column;align-items:center;gap:6px;padding:18px 12px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;transition:all .25s ease}.exam-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.exam-btn.selected{background:rgba(110,231,255,.12);border-color:var(--accent);box-shadow:0 0 16px rgba(110,231,255,.2)}.exam-icon{font-size:22px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.exam-label{font-weight:700;font-size:14px}.length-select{display:flex;gap:10px;margin-top:10px}.length-btn{padding:10px 20px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-weight:700;cursor:pointer;transition:all .2s ease}.length-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.length-btn.selected{background:rgba(110,231,255,.12);border-color:var(--accent)}.difficulty-select{display:flex;gap:10px;margin-top:10px}.diff-btn{padding:10px 12px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-weight:700;cursor:pointer;transition:all .2s ease;flex:1;font-size:13px;display:flex;flex-direction:column;align-items:center;gap:2px}.diff-mult{display:block;font-size:11px;font-weight:600;color:var(--muted);white-space:nowrap;margin-top:2px}.diff-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.diff-btn.selected{background:rgba(110,231,255,.12);border-color:var(--accent)}.domain-select-wrap{margin-top:0;padding:0 16px}.domain-checkboxes{display:flex;flex-direction:column;gap:4px;margin-top:6px;padding-left:24px}.domain-check-label{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);cursor:pointer;padding:5px 0}.domain-check-label input[type=checkbox]{accent-color:var(--accent);width:15px;height:15px;margin:0;flex-shrink:0}.domain-check-label:has(input:checked) span{color:var(--text)}.domain-all-label{font-weight:700;font-size:13px;color:var(--text);padding:6px 0;border-bottom:1px solid var(--border);margin-bottom:2px}.pbq-select{display:flex;gap:8px;margin-top:8px;flex-wrap:wrap}.pbq-btn{padding:8px 14px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-weight:700;cursor:pointer;transition:all .2s ease;flex:1;font-size:12px;min-width:0;white-space:nowrap}.pbq-btn:hover{background:rgba(255,215,0,.08);border-color:rgba(255,215,0,.3)}.pbq-btn.selected{background:rgba(255,215,0,.12);border-color:gold;color:gold}body.theme-light .pbq-btn.selected{background:rgba(180,130,0,.1);border-color:#b8860b;color:#b8860b}.theme-select{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}.theme-btn{padding:10px 16px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:13px;display:flex;align-items:center;gap:6px;transition:background .2s,border-color .2s}.theme-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.theme-btn.selected{background:rgba(110,231,255,.12);border-color:var(--accent)}.atmosphere-select{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}.atmo-btn{padding:10px 16px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:13px;transition:background .2s,border-color .2s}.atmo-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.atmo-btn.selected{background:rgba(110,231,255,.12);border-color:var(--accent)}body.theme-light .atmo-btn{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.12)}body.theme-light .atmo-btn:hover{background:rgba(59,130,246,.08);border-color:rgba(59,130,246,.3)}body.theme-light .atmo-btn.selected{background:rgba(59,130,246,.15);border-color:var(--accent)}.theme-swatch{display:inline-block;width:14px;height:14px;border-radius:50%;flex-shrink:0}.theme-swatch-electric{background:linear-gradient(135deg,#6ee7ff,#a78bfa)}.theme-swatch-midnight{background:linear-gradient(135deg,#60a5fa,#818cf8)}.theme-swatch-forest{background:linear-gradient(135deg,#34d399,#a3e635)}.theme-swatch-ember{background:linear-gradient(135deg,#fbbf24,#f97316)}.theme-swatch-crimson{background:linear-gradient(135deg,#ef4444,#f97316)}.theme-swatch-sakura{background:linear-gradient(135deg,#ec4899,#f472b6)}.theme-swatch-neon{background:linear-gradient(135deg,#a855f7,#e879f9)}.theme-swatch-light{background:linear-gradient(135deg,#3b82f6,#8b5cf6)}.appearance-dropdown{border:1px solid var(--border);border-radius:var(--radius);background:rgba(255,255,255,.02);overflow:hidden}.appearance-toggle{width:100%;padding:12px 16px;border:none;background:0 0;color:var(--text);font-size:14px;font-weight:600;cursor:pointer;display:flex;align-items:center;gap:8px;text-align:left}.appearance-toggle:hover{background:rgba(255,255,255,.04)}.appearance-toggle-icon{font-size:10px;color:var(--muted);transition:transform .2s}.appearance-preview{margin-left:auto;font-size:12px;font-weight:400;color:var(--muted)}.appearance-content{padding:0 16px 16px}.appearance-content .settings-toggle-row{max-width:220px}body.theme-light .appearance-dropdown{background:rgba(0,0,0,.02)}.fullscreen-btn{padding:8px 12px;font-size:18px;border-radius:10px;flex-shrink:0;line-height:1}.quiz-end-btn{padding:4px 10px;font-size:11px;font-weight:600;border-radius:8px;flex-shrink:0;color:var(--muted);border-color:var(--border)}.quiz-end-btn:hover{color:#f87171;border-color:#f87171}.quiz-nav-toggle-btn{padding:4px 10px;font-size:14px;font-weight:600;border-radius:8px;flex-shrink:0;color:var(--muted);border-color:var(--border)}.quiz-nav-toggle-btn:hover{color:var(--accent);border-color:var(--accent)}.quiz-nav-panel{padding:12px;margin-bottom:12px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.03)}.result-nav-panel{margin:16px 0}.result-nav-title{margin:0 0 10px;font-size:15px;color:var(--muted)}.quiz-nav-grid{display:flex;flex-wrap:wrap;gap:4px}.qnav-btn{width:32px;height:32px;border-radius:6px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);font-size:11px;font-weight:700;cursor:pointer;transition:all .15s}.qnav-btn:hover{border-color:var(--accent);color:var(--text)}.qnav-btn.qnav-current{border-color:var(--accent);color:var(--accent);background:rgba(110,231,255,.1)}.qnav-btn.qnav-correct{background:rgba(52,211,153,.15);color:#34d399;border-color:rgba(52,211,153,.3)}.qnav-btn.qnav-wrong{background:rgba(248,113,113,.12);color:#f87171;border-color:rgba(248,113,113,.3)}.qnav-btn.qnav-marked{box-shadow:inset 0 -3px 0 var(--accent)}.qnav-btn.qnav-skipped{background:rgba(249,115,22,.1);color:#f97316;border-color:rgba(249,115,22,.3)}.quiz-nav-legend{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}.quiz-nav-key{display:flex;align-items:center;gap:4px;font-size:10px;color:var(--muted)}.qnav-dot{width:10px;height:10px;border-radius:3px}.qnav-dot.qnav-correct{background:rgba(52,211,153,.4)}.qnav-dot.qnav-wrong{background:rgba(248,113,113,.4)}.qnav-dot.qnav-marked{background:var(--accent)}.qnav-dot.qnav-skipped{background:#f97316}.qnav-dot.qnav-unanswered{background:rgba(255,255,255,.1);border:1px solid var(--border)}body.theme-light .quiz-nav-panel{background:rgba(0,0,0,.02)}body.theme-light .qnav-btn{background:rgba(0,0,0,.03)}:-webkit-full-screen,:fullscreen{background:var(--card);overflow-y:auto;display:flex;flex-direction:column;justify-content:center;padding:min(6vh,48px) 0}:-webkit-full-screen .quiz-header,:fullscreen .quiz-header{max-width:800px;width:100%;margin:0 auto;padding:20px 48px 0}:-webkit-full-screen .quiz-question,:fullscreen .quiz-question{max-width:800px;width:100%;margin:0 auto;padding:0 48px;font-size:17px;line-height:1.7}:-webkit-full-screen .quiz-options,:fullscreen .quiz-options{max-width:800px;width:100%;margin:0 auto;padding:0 48px}:-webkit-full-screen .quiz-option,:fullscreen .quiz-option{padding:14px 18px;font-size:15px}:-webkit-full-screen .quiz-action-row,:fullscreen .quiz-action-row{max-width:800px;width:100%;margin:0 auto;padding:0 48px}:-webkit-full-screen .quiz-feedback,:fullscreen .quiz-feedback{max-width:800px;width:100%;margin:12px auto 0;padding:0 48px;font-size:14px}:-webkit-full-screen .quiz-next,:fullscreen .quiz-next{max-width:800px;width:100%;margin:20px auto 0;padding:14px 48px}:-webkit-full-screen .quiz-nav-panel,:fullscreen .quiz-nav-panel{max-width:800px;width:100%;margin:0 auto;padding:12px 48px}:-webkit-full-screen .test-nav-grid,:fullscreen .test-nav-grid{max-width:800px;width:100%;margin:0 auto;padding:0 48px}:-webkit-full-screen .quiz-progress-bar,:fullscreen .quiz-progress-bar{border-radius:0}@media(max-width:600px){:-webkit-full-screen .quiz-action-row,:-webkit-full-screen .quiz-feedback,:-webkit-full-screen .quiz-header,:-webkit-full-screen .quiz-next,:-webkit-full-screen .quiz-options,:-webkit-full-screen .quiz-question,:fullscreen .quiz-action-row,:fullscreen .quiz-feedback,:fullscreen .quiz-header,:fullscreen .quiz-next,:fullscreen .quiz-options,:fullscreen .quiz-question{padding-left:16px;padding-right:16px}}#atmosphereCanvas{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:0}.quiz-begin{margin-top:24px;width:100%;padding:14px;font-size:16px;opacity:.5;cursor:not-allowed;transition:opacity .3s}.begin-quiz-wrap{width:100%}.begin-quiz-tip{color:#f87171;text-align:center;margin-top:8px;transition:opacity .3s}.begin-quiz-tip.hidden{opacity:0}.quiz-begin.ready{opacity:1;cursor:pointer;animation:readyPulse 2s ease-in-out infinite}@keyframes readyPulse{0%,100%{box-shadow:0 0 20px rgba(110,231,255,.3)}50%{box-shadow:0 0 35px rgba(110,231,255,.5),0 0 60px rgba(167,139,250,.2)}}.quiz-header{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:20px}.quiz-progress-wrap{flex:1;display:flex;flex-direction:column}.quiz-progress-wrap #progressText{display:inline-flex;align-items:center;gap:8px}.bg-loading-spinner{display:inline-block;width:12px;height:12px;border-radius:50%;border:2px solid rgba(110,231,255,.25);border-top-color:var(--accent);animation:bgSpin .8s linear infinite;vertical-align:middle}@keyframes bgSpin{to{transform:rotate(360deg)}}.quiz-progress-bar{height:8px;border-radius:8px;background:rgba(255,255,255,.08);overflow:hidden;margin-bottom:6px}.quiz-progress-fill{height:100%;width:0%;border-radius:8px;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .4s ease}.quiz-score{white-space:nowrap;font-weight:700}.quiz-question{font-size:18px;font-weight:600;line-height:1.5;margin-bottom:18px}.quiz-scenario-output{display:block;margin:10px 0;padding:12px 14px;border-radius:8px;background:rgba(0,0,0,.3);font-family:monospace;font-size:12px;line-height:1.6;white-space:pre-wrap;overflow-x:auto;color:#a5f3fc;border:1px solid rgba(110,231,255,.1)}body.theme-light .quiz-scenario-output{background:rgba(0,0,0,.05);color:#0c4a6e;border-color:rgba(0,0,0,.1)}.quiz-inline-code{padding:1px 5px;border-radius:4px;font-family:monospace;font-size:12px;background:rgba(110,231,255,.1);color:#a5f3fc}body.theme-light .quiz-inline-code{background:rgba(0,0,0,.06);color:#0c4a6e}.quiz-domain-badge{display:inline-block;font-size:11px;font-weight:600;color:var(--accent);background:rgba(110,231,255,.08);padding:4px 10px;border-radius:8px;margin-bottom:10px}.quiz-pbq-badge{display:inline-block;font-size:11px;font-weight:700;color:gold;background:rgba(255,215,0,.1);padding:4px 10px;border-radius:8px;margin-bottom:10px;margin-left:8px}.quiz-diagram-container{margin-bottom:18px;padding:16px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.04);overflow-x:auto;text-align:center}.quiz-diagram-container svg{max-width:100%;height:auto}.diagram-error{padding:12px;color:#ff6b6b;font-size:13px;margin-bottom:8px}.diagram-fallback{text-align:left;font-size:11px;padding:12px;background:rgba(0,0,0,.2);border-radius:8px;overflow-x:auto;white-space:pre-wrap;color:var(--muted)}.quiz-diagram-container svg .diagram-title{font-size:14px;font-weight:700;fill:var(--text);text-anchor:middle}.quiz-diagram-container svg .network-label{font-size:11px;font-weight:600;fill:var(--text)}.quiz-diagram-container svg .subnet-label{font-size:10px;fill:var(--muted);font-family:monospace}.quiz-diagram-container svg .device-label{font-size:11px;fill:var(--text);text-anchor:middle}.quiz-diagram-container svg .ip-label{font-size:9px;fill:var(--muted);font-family:monospace}.quiz-diagram-container svg .device-icon{stroke:var(--text);fill:none;stroke-width:1.5}.quiz-diagram-container svg .connection-line{stroke-dasharray:4 2;stroke-width:1.5;opacity:.5}.quiz-diagram-container svg .diagram-device{cursor:pointer}.quiz-diagram-container svg .diagram-device:hover .device-icon{stroke:var(--accent);stroke-width:2}body.theme-light .quiz-diagram-container{background:rgba(0,0,0,.02)}body.theme-light .quiz-pbq-badge{color:#b8860b;background:rgba(255,215,0,.15)}body.theme-light .diagram-fallback{background:rgba(0,0,0,.04)}body.theme-light .quiz-diagram-container svg .device-icon{stroke:#333}body.theme-light .quiz-diagram-container svg .connection-line{opacity:.4}.quiz-options{list-style:none;padding:0;margin:0;display:grid;gap:10px}.quiz-option{width:100%;text-align:left;padding:14px 16px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:15px;cursor:pointer;transition:all .2s ease}.quiz-option .option-letter{display:inline-block;margin-right:12px;min-width:1.5em;font-weight:700;color:var(--accent)}.quiz-option:hover:not(:disabled){background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.quiz-option:disabled{cursor:default}.quiz-option.correct{background:rgba(107,207,127,.15);border-color:rgba(107,207,127,.6);color:#6bcf7f}.quiz-option.wrong{background:rgba(255,71,87,.12);border-color:rgba(255,71,87,.5);color:#ff6b6b}.quiz-feedback{margin-top:16px;padding:16px;border-radius:14px;background:rgba(255,255,255,.04);border:1px solid var(--border)}.feedback-header{font-weight:800;font-size:16px;margin-bottom:8px}.feedback-header.correct{color:#6bcf7f}.feedback-header.wrong{color:#ff6b6b}.quiz-table{width:100%;border-collapse:collapse;font-size:12px;margin:12px 0;background:rgba(255,255,255,.03);border-radius:8px;overflow:hidden}.quiz-table th{background:rgba(110,231,255,.08);color:var(--accent);font-weight:700;padding:8px 10px;text-align:left;border-bottom:2px solid var(--border);font-size:11px;text-transform:uppercase;letter-spacing:.3px}.quiz-table td{padding:6px 10px;border-bottom:1px solid rgba(255,255,255,.04);color:var(--text)}.quiz-table tr:hover td{background:rgba(255,255,255,.03)}body.theme-light .quiz-table{background:rgba(0,0,0,.02)}body.theme-light .quiz-table th{background:rgba(59,130,246,.06);color:var(--accent);border-color:rgba(0,0,0,.08)}body.theme-light .quiz-table td{border-color:rgba(0,0,0,.04)}body.theme-light .quiz-table tr:hover td{background:rgba(0,0,0,.02)}.feedback-explain{font-size:14px;color:var(--text);margin:0;line-height:1.6;padding:10px 12px;border-radius:8px;background:rgba(107,207,127,.08);border-left:3px solid #6bcf7f}.feedback-wrong-section{margin-top:10px;padding-top:10px;border-top:1px solid var(--border)}.feedback-wrong-header{font-size:13px;font-weight:700;color:#ef4444;margin:0 0 6px}.feedback-wrong-explain{font-size:12px;color:var(--muted);margin:4px 0;line-height:1.4}.feedback-wrong-option{font-weight:700;color:#ef4444}.chat-translate-btn{background:0 0;border:none;cursor:pointer;font-size:12px;padding:0 4px;opacity:.5;transition:opacity .2s}.chat-translate-btn:hover{opacity:1}.msgr-panel{position:fixed;bottom:88px;right:80px;width:320px;height:420px;background:var(--card);border:1px solid var(--border);border-radius:14px;box-shadow:0 8px 32px rgba(0,0,0,.3);z-index:250;display:flex;flex-direction:column;overflow:hidden;transition:height .2s,opacity .2s}.msgr-hidden{display:none!important}.msgr-minimized{height:42px;overflow:hidden}.msgr-minimized .msgr-body,.msgr-minimized .msgr-chat{display:none}.msgr-header{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--border);cursor:pointer;flex-shrink:0}.msgr-title{font-weight:700;font-size:14px}.msgr-header-btns{display:flex;gap:4px}.msgr-header-btns button{background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:18px;padding:0 4px;line-height:1}.msgr-header-btns button:hover{color:var(--text)}.msgr-body{flex:1;display:flex;flex-direction:column;overflow:hidden}.msgr-search-row{padding:8px 10px;border-bottom:1px solid var(--border)}.msgr-search{width:100%;padding:6px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:13px}.msgr-friend-list{flex:1;overflow-y:auto}.msgr-friend-item{padding:10px 14px;cursor:pointer;border-bottom:1px solid rgba(255,255,255,.04);transition:background .15s;display:flex;align-items:center;gap:10px}.msgr-friend-item:hover{background:rgba(255,255,255,.06)}.msgr-avatar{width:32px;height:32px;border-radius:50%;font-size:16px;display:flex;align-items:center;justify-content:center;flex-shrink:0}.msgr-avatar-letter{background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:900;font-size:14px}.msgr-friend-info{flex:1;min-width:0}.msgr-friend-name{font-size:13px;font-weight:600;display:flex;align-items:center;gap:6px}.msgr-real-name{font-weight:400;color:var(--muted);font-size:11px}.msgr-preview{display:block;font-size:11px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:180px}.msgr-preview-unread{color:var(--text);font-weight:600}.msgr-time{display:block;font-size:10px;color:var(--muted)}.msgr-emoji-panel{display:grid;grid-template-columns:repeat(10,1fr);gap:1px;padding:6px;border-top:1px solid var(--border);max-height:100px;overflow-y:auto}.msgr-emoji-panel.msgr-hidden{display:none}.msgr-emoji-pick{background:0 0;border:none;font-size:16px;cursor:pointer;padding:3px;border-radius:4px;text-align:center}.msgr-emoji-pick:hover{background:rgba(255,255,255,.1)}.msgr-emoji-btn,.msgr-mic-btn{background:0 0;border:none;font-size:16px;cursor:pointer;padding:0 4px;flex-shrink:0;opacity:.6;transition:opacity .2s}.msgr-emoji-btn:hover,.msgr-mic-btn:hover{opacity:1}.msgr-mic-active{opacity:1;color:#ef4444;animation:micPulse 1s infinite}@keyframes micPulse{0%,100%{opacity:1}50%{opacity:.4}}body.theme-light .msgr-emoji-pick:hover{background:rgba(0,0,0,.06)}.msgr-unread-dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex-shrink:0}.msgr-chat{flex:1;display:flex;flex-direction:column;min-height:0;overflow:hidden}.msgr-chat-header{display:flex;align-items:center;gap:8px;padding:8px 12px;border-bottom:1px solid var(--border);flex-shrink:0}.msgr-back-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:16px;padding:2px 6px}.msgr-back-btn:hover{color:var(--text)}.msgr-chat-name{font-weight:700;font-size:14px}.msgr-chat-messages{flex:1;overflow-y:auto;padding:10px;min-height:0}.msgr-msg{margin-bottom:6px;max-width:85%;position:relative}.msgr-msg-me{margin-left:auto;text-align:right}.msgr-msg-them{margin-right:auto}.msgr-msg-text{display:inline-block;padding:6px 10px;border-radius:12px;font-size:13px;line-height:1.4}.msgr-msg-me .msgr-msg-text{background:var(--accent);color:#000;border-radius:12px 12px 4px 12px}.msgr-msg-them .msgr-msg-text{background:rgba(255,255,255,.08);border-radius:12px 12px 12px 4px}.msgr-msg-time{display:block;font-size:10px;color:var(--muted);margin-top:2px;transition:opacity .2s,max-height .2s;opacity:1;max-height:20px;overflow:hidden}.msgr-msg-time.msgr-time-hidden{opacity:0;max-height:0;margin:0}.msgr-react-btn{position:absolute;top:2px;opacity:0;background:0 0;border:1px solid var(--border);border-radius:50%;width:20px;height:20px;font-size:11px;line-height:18px;cursor:pointer;color:var(--muted);transition:opacity .15s}.msgr-msg:hover .msgr-react-btn{opacity:1}.msgr-msg-me .msgr-react-btn{left:-24px}.msgr-msg-them .msgr-react-btn{right:-24px}.msgr-react-picker{position:absolute;bottom:100%;display:flex;gap:2px;padding:4px 6px;background:var(--card);border:1px solid var(--border);border-radius:12px;box-shadow:0 4px 12px rgba(0,0,0,.3);z-index:300;white-space:nowrap}.msgr-msg-me .msgr-react-picker{right:0}.msgr-msg-them .msgr-react-picker{left:0}.msgr-react-emoji{background:0 0;border:none;font-size:16px;cursor:pointer;padding:2px 4px;border-radius:4px;transition:background .15s}.msgr-react-emoji:hover{background:rgba(255,255,255,.1)}.msgr-reactions{display:flex;gap:3px;margin-top:2px;flex-wrap:wrap}.msgr-msg-me .msgr-reactions{justify-content:flex-end}.msgr-reaction{display:inline-flex;align-items:center;gap:2px;font-size:13px;background:rgba(255,255,255,.08);border:1px solid var(--border);border-radius:10px;padding:1px 5px;cursor:default}.msgr-reaction-count{font-size:10px;color:var(--muted)}.msgr-chat-input-row{display:flex;gap:6px;padding:8px 10px;border-top:1px solid var(--border);flex-shrink:0}.msgr-chat-input{flex:1;padding:6px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:13px}.msgr-chat-send{padding:6px 12px;border-radius:8px;border:none;background:var(--accent);color:#000;font-weight:700;font-size:12px;cursor:pointer}.msgr-toggle-btn{position:fixed;bottom:88px;right:24px;width:48px;height:48px;border-radius:50%;border:none;background:var(--accent);color:#000;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(0,0,0,.3);z-index:249;transition:transform .2s}.msgr-toggle-btn:hover{transform:scale(1.1)}.msgr-toggle-badge{position:absolute;top:-4px;right:-4px;width:18px;height:18px;border-radius:50%;background:#ef4444;color:#fff;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center}.msgr-read-receipt{text-align:right;font-size:10px;color:var(--muted);padding:0 4px 2px;font-style:italic}.msgr-toast-container{position:fixed;top:16px;right:16px;z-index:10000;display:flex;flex-direction:column;gap:8px;pointer-events:none;max-width:320px}.msgr-toast{pointer-events:auto;cursor:pointer;padding:12px 16px;border-radius:12px;background:var(--card,#1a1a2e);border:1px solid var(--border);box-shadow:0 8px 24px rgba(0,0,0,.4);display:flex;flex-direction:column;gap:2px;animation:msgrToastIn .3s ease}.msgr-toast:hover{border-color:var(--accent)}.msgr-toast-name{font-size:13px;font-weight:700;color:var(--text)}.msgr-toast-text{font-size:12px;color:var(--muted);line-height:1.3}.msgr-toast-out{animation:msgrToastOut .4s ease forwards}@keyframes msgrToastIn{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:translateX(0)}}@keyframes msgrToastOut{from{opacity:1;transform:translateX(0)}to{opacity:0;transform:translateX(40px)}}body.theme-light .msgr-toast{background:#fff;box-shadow:0 8px 24px rgba(0,0,0,.12)}body.theme-light .msgr-panel{box-shadow:0 8px 32px rgba(0,0,0,.12)}body.theme-light .msgr-msg-them .msgr-msg-text{background:rgba(0,0,0,.06)}body.theme-light .msgr-react-emoji:hover{background:rgba(0,0,0,.06)}body.theme-light .msgr-reaction{background:rgba(0,0,0,.04)}body.theme-light .msgr-react-picker{background:#fff}body.theme-light .msgr-search{background:rgba(0,0,0,.03)}body.theme-light .msgr-chat-input{background:rgba(0,0,0,.03)}.friend-chat-translated{display:block;color:var(--accent);font-style:italic;margin-top:2px}.q-feedback-actions{display:flex;gap:8px;align-items:center;margin-top:10px;padding-top:8px;border-top:1px solid var(--border)}.q-flag-btn,.q-rate-btn{background:0 0;border:1px solid var(--border);border-radius:8px;padding:4px 10px;cursor:pointer;font-size:16px;transition:background .2s,border-color .2s;color:var(--text)}.q-rate-btn:hover{background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.q-rate-btn.active{background:rgba(110,231,255,.15);border-color:var(--accent)}.q-flag-btn{margin-left:auto;font-size:14px}.q-flag-btn:hover{background:rgba(248,113,113,.08);border-color:rgba(248,113,113,.3)}.q-flag-form{display:flex;gap:6px;align-items:center;margin-top:8px}.q-flag-reason{flex:1;padding:6px 8px;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:12px}.q-feedback-status{display:block;margin-top:6px;font-size:12px;color:var(--accent)}.quiz-action-row{display:flex;gap:8px;margin-top:12px;justify-content:flex-end}.quiz-back-btn{padding:6px 14px;font-size:12px;font-weight:600;color:var(--muted);border-color:var(--border);border-radius:8px}.quiz-back-btn:hover:not(:disabled){color:var(--accent);border-color:var(--accent)}.quiz-back-btn:disabled{opacity:.4;cursor:default}.quiz-skip-btn{padding:6px 14px;font-size:12px;font-weight:600;color:var(--muted);border-color:var(--border);border-radius:8px}.quiz-skip-btn:hover{color:var(--accent);border-color:var(--accent)}.quiz-mark-btn{padding:6px 14px;font-size:12px;font-weight:600;color:var(--muted);border-color:var(--border);border-radius:8px}.quiz-mark-btn:hover{color:var(--accent);border-color:var(--accent)}.quiz-mark-btn.marked{color:var(--accent);border-color:var(--accent);background:rgba(110,231,255,.1)}.quiz-report-btn{padding:6px 14px;font-size:12px;font-weight:600;color:var(--muted);border-color:var(--border);border-radius:8px}.quiz-report-btn:hover{color:#f97316;border-color:#f97316}.feedback-question-preview{padding:12px 16px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.03);margin-top:6px}.fq-meta{font-size:11px;color:var(--accent);font-weight:600;text-transform:uppercase;letter-spacing:.5px;margin-bottom:6px}.fq-text{font-size:14px;line-height:1.5;margin:0 0 8px}.fq-options{display:flex;flex-direction:column;gap:4px}.fq-opt{font-size:13px;padding:4px 8px;border-radius:6px;background:rgba(255,255,255,.04)}.fq-correct{background:rgba(52,211,153,.12);color:#34d399;font-weight:600}.feedback-issue-type{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}.issue-btn{padding:6px 12px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);font-size:12px;font-weight:600;cursor:pointer;transition:all .15s}.issue-btn:hover{border-color:var(--accent);color:var(--text)}.issue-btn.active{border-color:var(--accent);color:var(--accent);background:rgba(110,231,255,.08)}body.theme-light .feedback-question-preview{background:rgba(0,0,0,.02)}body.theme-light .fq-opt{background:rgba(0,0,0,.03)}body.theme-light .issue-btn{background:rgba(0,0,0,.02)}.quiz-next{margin-top:18px;width:100%;padding:14px;opacity:.5;cursor:not-allowed;transition:opacity .3s}.quiz-next.ready{opacity:1;cursor:pointer}.test-mode-section{border-top:1px solid var(--border);padding-top:16px}.test-mode-toggle-row{display:flex;align-items:center;justify-content:space-between}.test-mode-toggle-row h3{margin:0}.test-mode-desc{color:var(--muted);margin:6px 0 0}.toggle-switch{position:relative;display:inline-block;width:48px;height:26px}.toggle-switch input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(255,255,255,.12);border-radius:26px;cursor:pointer;transition:background .25s}.toggle-slider::before{content:"";position:absolute;width:20px;height:20px;left:3px;bottom:3px;background:#fff;border-radius:50%;transition:transform .25s}.toggle-switch input:checked+.toggle-slider{background:var(--accent)}.toggle-switch input:checked+.toggle-slider::before{transform:translateX(22px)}.test-mode-config{margin-top:12px}.time-select{display:flex;gap:8px;flex-wrap:wrap}.time-btn{padding:8px 16px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:14px;transition:all .2s}.time-btn:hover{border-color:var(--accent);background:rgba(110,231,255,.08)}.time-btn.selected{border-color:var(--accent);background:rgba(110,231,255,.12);color:var(--accent);font-weight:600}.test-timer{font-size:18px;font-weight:700;font-variant-numeric:tabular-nums;color:var(--accent);white-space:nowrap}.test-timer.warning{color:#ff6b6b;animation:timerPulse 1s infinite}@keyframes timerPulse{0%,100%{opacity:1}50%{opacity:.5}}.test-nav-grid{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:16px}.test-nav-cell{width:36px;height:36px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);font-size:13px;font-weight:600;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center}.test-nav-cell:hover{border-color:var(--accent)}.test-nav-cell.answered{background:rgba(110,231,255,.15);color:var(--accent);border-color:rgba(110,231,255,.3)}.test-nav-cell.current{outline:2px solid var(--accent);outline-offset:1px}.test-nav-buttons{display:flex;gap:10px;margin-top:18px}.test-nav-buttons .btn{flex:1;padding:14px}.quiz-option.test-selected{border-color:var(--accent);background:rgba(110,231,255,.12);color:var(--accent)}.review-grid{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0}.review-cell{width:42px;height:42px;border-radius:10px;border:1px solid var(--border);font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;display:flex;align-items:center;justify-content:center}.review-cell.answered{background:rgba(107,207,127,.15);color:#6bcf7f;border-color:rgba(107,207,127,.4)}.review-cell.unanswered{background:rgba(255,71,87,.1);color:#ff6b6b;border-color:rgba(255,71,87,.3)}.review-cell:hover{transform:scale(1.1)}.review-summary{text-align:center;color:var(--muted);margin:12px 0}.review-actions{display:flex;gap:10px}.review-actions .btn{flex:1;padding:14px}.result-title{text-align:center;font-size:24px;margin-bottom:20px}.result-ring-wrap{position:relative;width:140px;height:140px;margin:0 auto 16px}.result-ring{width:100%;height:100%}.result-ring-text{position:absolute;inset:0;display:flex;align-items:center;justify-content:center}.result-pct{font-size:28px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.result-score{text-align:center;font-size:16px;color:var(--muted);margin:0 0 8px}.result-msg{text-align:center;font-weight:700;font-size:16px;margin:0 0 20px}.result-msg.great{color:#6bcf7f}.result-msg.good{color:var(--accent)}.result-msg.okay{color:#ffd93d}.result-msg.needs-work{color:#ff6b6b}.retry-options{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-bottom:12px}.retry-radio-label{display:inline-flex;align-items:center;gap:6px;font-size:12px;color:var(--muted);cursor:pointer;padding:7px 12px;border-radius:10px;background:rgba(255,255,255,.03);border:1px solid var(--border);transition:border-color .2s,background .2s}.retry-radio-label:hover{border-color:rgba(110,231,255,.2)}.retry-radio-label:has(input:checked){border-color:var(--accent);background:rgba(110,231,255,.08);color:var(--text)}.retry-radio-label input[type=radio]{accent-color:var(--accent);width:14px;height:14px;margin:0}body.theme-light .retry-radio-label{background:rgba(0,0,0,.02)}body.theme-light .retry-radio-label:has(input:checked){background:rgba(59,130,246,.08);border-color:var(--accent)}.result-actions{display:flex;gap:12px;justify-content:center}.result-actions .btn{min-width:140px;justify-content:center}.result-review-actions{display:flex;gap:10px;justify-content:center;align-items:center;margin:12px 0 16px;flex-wrap:wrap}.review-toggle-btn{font-size:13px;padding:8px 16px;border-radius:20px}.review-toggle-btn.active{background:var(--accent);color:#0b1220}.free-limit-error{text-align:center;padding:16px;margin:12px 0;border-radius:var(--radius);background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.3);color:#fca5a5}.free-limit-error p{margin:0 0 10px;font-weight:600;font-size:14px}.result-review-section{margin-top:16px;margin-bottom:20px;max-height:500px;overflow-y:auto;border:1px solid var(--border);border-radius:var(--radius);padding:16px;background:rgba(255,255,255,.02)}.result-review-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}.result-review-header h4{margin:0;color:var(--accent);font-size:15px}.result-review-q{padding:14px;border-radius:10px;margin-bottom:12px;border:1px solid var(--border);background:rgba(255,255,255,.02)}.result-review-q:last-child{margin-bottom:0}.review-q-correct{border-left:3px solid #34d399}.review-q-wrong{border-left:3px solid #f87171}.result-review-q-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.result-review-q-num{font-size:12px;font-weight:700;padding:2px 8px;border-radius:10px;background:rgba(255,255,255,.15);color:var(--text)}body.theme-light .result-review-q-num{background:rgba(0,0,0,.08);color:var(--text)}.result-review-q-status{font-size:12px;font-weight:700}.review-q-correct .result-review-q-status{color:#34d399}.review-q-wrong .result-review-q-status{color:#f87171}.result-review-q-text{font-weight:600;font-size:14px;margin-bottom:6px}.result-review-q-domain{color:var(--accent);margin-bottom:8px}.result-review-q-options{list-style:none;padding:0;margin:0 0 8px}.result-review-q-options li{padding:6px 10px;border-radius:8px;margin-bottom:4px;font-size:13px;border:1px solid transparent}.review-opt-correct{border-color:#34d399;background:rgba(52,211,153,.1);color:#34d399}.review-opt-wrong{border-color:#f87171;background:rgba(248,113,113,.1);color:#f87171}.result-review-q-explain{color:var(--muted);font-style:italic;padding:6px 10px;background:rgba(255,255,255,.03);border-radius:8px}body.theme-light .result-review-section{background:rgba(0,0,0,.02)}body.theme-light .result-review-q{background:rgba(0,0,0,.02)}.loading-wrap{text-align:center;padding:40px 20px}.loading-spinner{width:48px;height:48px;border:4px solid rgba(255,255,255,.1);border-top-color:var(--accent);border-radius:50%;margin:0 auto 20px;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{font-weight:700;font-size:16px;margin:0 0 8px}@media (max-width:700px){.exam-select{grid-template-columns:repeat(2,1fr)}.length-select{flex-wrap:wrap}.difficulty-select{flex-wrap:wrap}.quiz-question{font-size:16px}.result-actions{flex-direction:column;align-items:stretch}.result-actions .btn{min-width:auto}.result-review-actions{flex-direction:column;gap:8px}.result-review-actions .btn{min-width:auto;width:100%}.result-review-q-header{flex-direction:column;gap:2px}.mp-lb-table{font-size:12px}.mp-lb-table td,.mp-lb-table th{padding:6px 4px}.mp-podium{gap:6px}.mp-podium-place{padding:12px 4px 10px}.team-result-banner{flex-direction:column;gap:8px;padding:12px}.team-result-pts{font-size:20px}.quiz-diagram-container{padding:8px}.quiz-diagram-container svg{max-height:300px}.quiz-pbq-badge{display:block;margin-left:0;margin-bottom:8px}}@media (max-width:480px){h1{font-size:30px}input{padding:11px 11px}}.paywall-price{text-align:center;margin:24px 0 20px}.paywall-amount{font-size:48px;font-weight:800;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.paywall-period{display:block;font-size:14px;color:var(--muted);margin-top:4px}.paywall-card{text-align:center;max-width:520px;margin:0 auto;border:1px solid rgba(110,231,255,.15);background:linear-gradient(180deg,rgba(110,231,255,.03),transparent 60%)}.paywall-header{margin-bottom:20px}.paywall-header h2{margin:0 0 6px;font-size:22px}.paywall-header p{color:var(--muted);margin:0;font-size:14px}body.theme-light .paywall-card{border-color:rgba(59,130,246,.15);background:linear-gradient(180deg,rgba(59,130,246,.03),transparent 60%)}.paywall-perks{display:grid;grid-template-columns:1fr 1fr;gap:8px 16px;max-width:360px;margin:0 auto 20px;text-align:left}.paywall-perk{font-size:13px;font-weight:600;color:var(--text)}.paywall-features{list-style:none;padding:0;margin:0 0 24px;text-align:left;max-width:340px;margin-left:auto;margin-right:auto}.paywall-features li{padding:6px 0 6px 24px;position:relative;color:var(--muted)}.paywall-features li::before{content:"\2713";position:absolute;left:0;color:var(--accent);font-weight:700}.tier-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px}.tier-card{position:relative;padding:20px 16px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.04);text-align:center;display:flex;flex-direction:column;gap:8px;align-items:center}.tier-card.popular{border-color:var(--accent);background:rgba(110,231,255,.06);box-shadow:0 0 20px rgba(110,231,255,.15)}.tier-badge{position:absolute;top:-10px;left:50%;transform:translateX(-50%);padding:2px 12px;border-radius:20px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#06101b;font-size:11px;font-weight:800;white-space:nowrap}.tier-name{font-weight:700;font-size:15px;margin-top:4px}.tier-price{font-size:32px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.tier-unit{font-size:16px;font-weight:700}.tier-desc{margin-bottom:4px}.tier-buy{width:100%;padding:10px 16px;font-size:14px;margin-top:auto}@media (max-width:600px){.tier-grid{grid-template-columns:1fr;max-width:300px;margin-left:auto;margin-right:auto}}.paywall-trial-section{border-top:1px solid var(--border);padding-top:20px;text-align:center;background:linear-gradient(135deg,rgba(110,231,255,.04),rgba(167,139,250,.04));margin:0 -20px;padding:20px 20px}.btn-link{background:0 0;border:none;color:var(--accent);cursor:pointer;text-decoration:underline;font-family:inherit;padding:0}.btn-link:hover{color:var(--text)}.trial-signup-section{text-align:center;padding:20px 0}.trial-signup-section h4{margin:0 0 6px;font-size:1.1rem}.trial-signup-section .paywall-code-input input{text-align:center;letter-spacing:4px;font-weight:700}.paywall-divider{display:flex;align-items:center;gap:16px;margin:20px 0;color:var(--muted);font-size:.85rem}.paywall-divider::after,.paywall-divider::before{content:"";flex:1;border-top:1px solid var(--border)}.oauth-section{text-align:center}.oauth-buttons{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-top:10px}.oauth-btn{display:inline-flex;align-items:center;gap:8px;padding:10px 18px;border-radius:8px;font-size:.9rem;font-weight:600;text-decoration:none;transition:opacity .2s,transform .1s;border:1px solid var(--border)}.oauth-btn:hover{opacity:.85;transform:translateY(-1px)}.oauth-btn svg{flex-shrink:0}.oauth-google{background:#fff;color:#3c4043}.oauth-microsoft{background:#2f2f2f;color:#fff}.oauth-github{background:#24292e;color:#fff}.remember-device-label{display:flex;align-items:center;gap:6px;cursor:pointer;color:var(--muted)}.remember-device-label input[type=checkbox]{accent-color:var(--accent);width:16px;height:16px;cursor:pointer}.paywall-code-section{border-top:1px solid var(--border);padding-top:20px;text-align:center}.paywall-code-input{display:flex;gap:8px;max-width:380px;margin:10px auto 0}.paywall-code-input input{flex:1;padding:10px 14px;background:var(--bg);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:14px}.code-error{color:#ff6b6b;margin-top:8px}.access-code-display{display:flex;align-items:center;justify-content:center;gap:12px;margin:12px 0 16px}.access-code-display code{font-size:16px;font-weight:700;padding:12px 20px;background:var(--bg);border:2px solid var(--accent);border-radius:12px;color:var(--accent);word-break:break-all}.email-toggle-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;padding:4px;display:inline-flex;align-items:center;transition:color .2s;flex-shrink:0}.email-toggle-btn:hover{color:var(--fg)}.email-toggle-btn .eye-icon.hidden{display:none}.email-mask-wrap{display:flex;align-items:center;gap:8px}.free-banner{background:linear-gradient(135deg,rgba(110,231,255,.1),rgba(167,139,250,.1));border:1px solid rgba(110,231,255,.2);border-radius:10px;padding:10px 16px;text-align:center;font-size:13px;font-weight:600;color:var(--accent);margin-bottom:16px}.free-banner-upgrade{display:inline-block;margin-left:8px;color:var(--text);font-weight:700;font-size:12px;text-decoration:none;padding:2px 10px;background:var(--accent);border-radius:20px;color:#0b1220;transition:opacity .2s}.free-banner-upgrade:hover{opacity:.85}.free-banner-exhausted{color:#f87171;font-weight:700}.profile-status-row{display:flex;align-items:center;gap:8px;padding:8px 0;border-bottom:1px solid var(--border);margin-bottom:6px}.profile-status-select{flex:1;padding:4px 8px;border-radius:6px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:12px}.friend-status-dot{font-size:14px;flex-shrink:0;cursor:default}.nav-secondary-sticky{position:sticky;top:0;z-index:99;background:rgba(11,18,32,.95);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px)}body.theme-light .nav-secondary-sticky{background:rgba(255,255,255,.95)}.nav-secondary-toggle{display:flex;align-items:center;gap:6px;cursor:pointer;flex-shrink:0;margin-left:8px}.nav-secondary-toggle input{display:none}.nav-toggle-slider{width:28px;height:16px;border-radius:8px;background:rgba(255,255,255,.15);position:relative;transition:background .2s}.nav-toggle-slider::after{content:"";position:absolute;top:2px;left:2px;width:12px;height:12px;border-radius:50%;background:var(--muted);transition:transform .2s}.nav-secondary-toggle input:checked+.nav-toggle-slider{background:var(--accent)}.nav-secondary-toggle input:checked+.nav-toggle-slider::after{transform:translateX(12px);background:#fff}.nav-toggle-label{color:var(--muted);font-size:11px;white-space:nowrap}.friend-chat-panel{position:fixed;bottom:20px;right:20px;width:340px;max-height:450px;z-index:300;display:flex;flex-direction:column;border:1px solid var(--border);box-shadow:0 8px 32px rgba(0,0,0,.3)}.friend-chat-header{display:flex;justify-content:space-between;align-items:center;padding:10px 14px;border-bottom:1px solid var(--border)}.friend-chat-header-actions{display:flex;gap:4px;align-items:center}.friend-chat-invite-btn{background:0 0;border:none;cursor:pointer;font-size:16px;padding:2px 4px;border-radius:4px;opacity:.6;transition:opacity .2s,background .2s}.friend-chat-invite-btn:hover{opacity:1;background:rgba(255,255,255,.08)}.friend-chat-open-btn{font-size:16px;padding:4px 8px;min-width:auto}.friend-emoji-btn{background:0 0;border:none;font-size:20px;cursor:pointer;padding:0 6px;flex-shrink:0;opacity:.7;transition:opacity .2s}.friend-emoji-btn:hover{opacity:1}.friend-emoji-panel{display:grid;grid-template-columns:repeat(10,1fr);gap:2px;padding:8px;border-top:1px solid var(--border);max-height:140px;overflow-y:auto}.friend-emoji-panel.hidden{display:none}.emoji-pick{background:0 0;border:none;font-size:18px;cursor:pointer;padding:4px;border-radius:4px;transition:background .15s;text-align:center;line-height:1}.emoji-pick:hover{background:rgba(255,255,255,.1)}body.theme-light .emoji-pick:hover{background:rgba(0,0,0,.06)}.friend-chat-close{background:0 0;border:none;color:var(--muted);font-size:20px;cursor:pointer;padding:0 4px}.friend-chat-close:hover{color:var(--text)}.friend-chat-messages{flex:1;overflow-y:auto;padding:10px;min-height:200px;max-height:300px}.friend-chat-msg{margin-bottom:8px}.friend-chat-msg-name{display:block;font-weight:600;margin-bottom:2px}.friend-chat-msg-text{display:inline-block;padding:6px 10px;border-radius:10px;font-size:13px;max-width:85%;word-break:break-word}.friend-chat-msg-me .friend-chat-msg-text{background:rgba(110,231,255,.12);color:var(--text);margin-left:auto}.friend-chat-msg-them .friend-chat-msg-text{background:rgba(255,255,255,.06);color:var(--text)}.friend-chat-msg-me{text-align:right}.friend-chat-input-row{display:flex;gap:6px;padding:8px 10px;border-top:1px solid var(--border)}.friend-chat-input-row input{flex:1;padding:6px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:13px}body.theme-light .friend-chat-panel{background:#fff}body.theme-light .friend-chat-msg-me .friend-chat-msg-text{background:rgba(59,130,246,.1)}body.theme-light .friend-chat-msg-them .friend-chat-msg-text{background:rgba(0,0,0,.04)}@media(max-width:600px){.friend-chat-panel{width:calc(100vw - 20px);right:10px;bottom:10px}}.friends-section{border-top:1px solid var(--border);padding-top:16px}.friend-add-row{display:flex;gap:8px;margin-top:8px}.friend-add-input{flex:1;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:13px}.friend-item,.friend-request-item{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;margin-bottom:6px;background:rgba(255,255,255,.03)}.friend-avatar{font-size:20px;flex-shrink:0}.friend-info{flex:1;display:flex;flex-direction:column;gap:1px}.friend-request-actions{display:flex;gap:6px;flex-shrink:0}.friend-request-item{background:rgba(110,231,255,.04);border:1px solid rgba(110,231,255,.15)}.friend-name{flex:1;font-weight:600;font-size:13px}.friend-since{font-size:11px}.friend-item-pending{opacity:.6}.friend-remove-btn{background:0 0!important;border:none!important;color:#f87171!important;cursor:pointer;font-size:13px;font-weight:600;padding:4px 10px;border-radius:6px}.friend-remove-btn:hover{background:rgba(248,113,113,.12)!important}.friend-block-btn{background:0 0!important;border:none!important;color:var(--muted)!important;cursor:pointer;font-size:12px;padding:4px 8px;border-radius:6px}.friend-block-btn:hover{color:#f87171!important;background:rgba(248,113,113,.08)!important}.friend-unblock-btn{background:0 0!important;border:1px solid var(--border)!important;color:var(--muted)!important;cursor:pointer;font-size:12px;padding:4px 10px;border-radius:6px}.friend-unblock-btn:hover{color:var(--accent)!important;border-color:var(--accent)!important}.friend-actions{display:flex;gap:6px;flex-shrink:0;align-items:center}.friend-wl{display:block;font-size:11px;margin-top:2px}.friend-w{color:#34d399;font-weight:700}.friend-l{color:#f87171;font-weight:700}.lb-you-badge{display:inline-block;padding:1px 6px;border-radius:4px;font-size:10px;background:rgba(110,231,255,.15);color:var(--accent);font-weight:700;margin-left:4px}.lb-col-vs{font-size:13px}#lbFriendsTable .lb-header-row,#lbFriendsTable .lb-row{grid-template-columns:48px 1fr 100px 100px}body.theme-light .friend-add-input{background:rgba(0,0,0,.03)}body.theme-light .friend-request-item{background:rgba(59,130,246,.04);border-color:rgba(59,130,246,.15)}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;z-index:500;background:rgba(0,0,0,.6);display:flex;align-items:center;justify-content:center;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-card{max-width:360px;width:90%;text-align:center;padding:28px 24px}.access-status{text-align:center;margin-bottom:12px;padding:8px 16px;background:rgba(110,231,255,.06);border-radius:10px;border:1px solid rgba(110,231,255,.15)}.result-upgrade{margin:20px 0;padding:16px;background:linear-gradient(135deg,rgba(110,231,255,.08),rgba(167,139,250,.08));border:1px solid rgba(110,231,255,.2);border-radius:12px;text-align:center}.result-upgrade .btn{margin-top:10px}.interstitial-wrap{text-align:center;padding:20px 0}.interstitial-label{font-size:11px;text-transform:uppercase;letter-spacing:1px;color:var(--muted);margin:0 0 12px}.ad-slot{min-height:250px;margin:0 auto 20px;max-width:336px;border-radius:12px;overflow:hidden}.ad-placeholder{width:100%;height:250px;background:rgba(255,255,255,.04);border:1px dashed var(--border);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:14px}.interstitial-countdown{font-size:14px;color:var(--muted);margin:0 0 14px}.interstitial-countdown strong{color:var(--accent);font-size:18px}#adContinueBtn{min-width:200px;transition:opacity .3s}#adContinueBtn:disabled{opacity:.5;cursor:not-allowed}.interstitial-upgrade{margin-top:16px}.interstitial-upgrade a{color:var(--accent);text-decoration:underline}.modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:200;display:flex;align-items:center;justify-content:center;padding:24px}.modal-card{max-width:440px;width:100%;text-align:center}.modal-card .paywall-code-input{justify-content:center}.modal-username-input{margin-top:12px}.modal-username-hint{margin-top:4px;color:var(--muted)}.modal-username-skip{margin-top:12px}.account-field{margin-bottom:16px}.account-field label{display:block;margin-bottom:4px;color:var(--muted);font-weight:600;text-transform:uppercase;letter-spacing:.5px}.account-value{font-size:16px;margin:0}#usernameDisplay{display:flex;align-items:center;gap:12px}#usernameDisplay .btn-link{flex-shrink:0}body.theme-light .modal-overlay{background:rgba(0,0,0,.45)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:absolute;top:-100%;left:16px;z-index:10000;padding:8px 16px;background:var(--accent);color:#000;font-weight:600;border-radius:0 0 8px 8px;text-decoration:none;transition:top .2s}.skip-link:focus{top:0}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn:focus-visible,.cat-btn:focus-visible,.diff-btn:focus-visible,.exam-btn:focus-visible,.length-btn:focus-visible,.quiz-option:focus-visible,.theme-btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px;box-shadow:0 0 0 4px rgba(110,231,255,.2)}body.theme-light :focus-visible{outline-color:var(--accent)}body.theme-light .btn:focus-visible,body.theme-light .cat-btn:focus-visible,body.theme-light .diff-btn:focus-visible,body.theme-light .exam-btn:focus-visible,body.theme-light .length-btn:focus-visible,body.theme-light .quiz-option:focus-visible,body.theme-light .theme-btn:focus-visible{box-shadow:0 0 0 4px rgba(59,130,246,.2)}.mp-entry-grid{display:flex;gap:24px;align-items:stretch}.mp-entry-box{flex:1;text-align:center;padding:16px;border-radius:var(--radius);background:rgba(255,255,255,.02);border:1px solid var(--border);transition:border-color .3s}.mp-entry-box:hover{border-color:rgba(110,231,255,.15)}.mp-entry-divider{display:flex;align-items:center;color:var(--muted);font-size:14px;padding:0 8px}@media(max-width:600px){.mp-entry-grid{flex-direction:column}.mp-entry-divider{justify-content:center;padding:0}}.mp-option-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:6px}.mp-opt-btn{padding:8px 16px;border-radius:10px;border:1px solid var(--border);background:0 0;color:var(--text);cursor:pointer;font-size:14px;transition:all .15s;text-align:center}.mp-opt-btn .diff-mult{display:block;font-size:11px;font-weight:600;color:var(--muted);white-space:nowrap;margin-top:2px}.mp-opt-btn:hover{border-color:var(--accent)}.mp-opt-btn.active{background:rgba(110,231,255,.12);color:var(--accent);border-color:var(--accent);font-weight:600}.mp-submit-answer{width:100%;margin-top:10px;padding:12px;font-size:15px}.mp-gen-overlay{position:absolute;inset:0;z-index:10;border-radius:var(--radius);background:rgba(11,18,32,.92);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center}.mp-gen-content{text-align:center;padding:24px}.mp-gen-content h3{margin:16px 0 8px;font-size:20px}.mp-gen-status{color:var(--muted);margin-bottom:16px}.mp-gen-bar-track{width:200px;height:6px;border-radius:3px;background:rgba(255,255,255,.08);margin:0 auto;overflow:hidden}.mp-gen-bar-fill{height:100%;border-radius:3px;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .5s ease}.mp-gen-time{margin-top:8px}body.theme-light .mp-gen-overlay{background:rgba(240,242,245,.92)}.mp-player-results{display:flex;flex-wrap:wrap;gap:8px;margin:12px 0;padding:10px;border-radius:10px;background:rgba(255,255,255,.03)}.mp-pr-item{font-size:13px;font-weight:600;padding:4px 10px;border-radius:8px}.mp-pr-correct{color:#34d399;background:rgba(52,211,153,.1)}.mp-pr-wrong{color:#f87171;background:rgba(248,113,113,.1)}.mp-lobby-header{display:flex;justify-content:space-between;align-items:flex-start;flex-wrap:wrap;gap:12px}.mp-room-code{font-family:monospace;font-size:24px;letter-spacing:4px;color:var(--accent);background:var(--bg);padding:4px 12px;border-radius:8px}.mp-lobby-settings{color:var(--muted)}.mp-player-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,1fr));gap:8px;margin-top:8px}.mp-player-card{padding:10px 12px;border-radius:10px;background:var(--bg);border:1px solid var(--border);text-align:center;font-size:14px}.mp-player-name{font-weight:600}.mp-player-you{color:var(--accent);font-size:12px}.mp-player-dc{color:var(--danger,#ff6b6b);font-size:11px}.mp-captain-badge{color:#fbbf24;font-size:11px;font-weight:700}.mp-vote-count{display:block;font-size:11px;color:var(--accent);margin-top:2px}.mp-tally{font-size:12px;font-weight:600;white-space:nowrap}.mp-costudy-review{margin-top:24px}.mp-costudy-review h4{margin-bottom:12px}.mp-review-item{padding:16px;margin-bottom:12px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.02)}.mp-review-q-num{font-size:11px;font-weight:700;color:var(--accent);text-transform:uppercase;margin:0 0 4px}body.theme-light .mp-review-item{background:rgba(0,0,0,.02)}.mp-costudy-tally{font-size:13px;color:var(--muted);margin-top:6px;text-align:center}.mp-exam-title{font-size:12px;font-weight:700;color:var(--accent);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;padding-bottom:6px;border-bottom:1px solid var(--border)}.mp-question-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}.mp-score-badge{font-weight:700;color:var(--accent);font-size:16px}.mp-question-text{font-size:18px;line-height:1.5;margin:16px 0}.mp-timer-bar{width:100%;height:8px;background:var(--border);border-radius:4px;overflow:hidden;margin-bottom:4px}.mp-timer-fill{height:100%;border-radius:4px;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:none}.mp-timer-fill.timer-urgent{background:linear-gradient(90deg,#ff6b6b,#ff4757)}.mp-options{display:flex;flex-direction:column;gap:10px}.mp-option-btn{width:100%;padding:14px 16px;border-radius:12px;border:1px solid var(--border);background:var(--bg);color:var(--text);cursor:pointer;font-size:15px;text-align:left;transition:all .15s}.mp-option-btn:hover:not(:disabled){border-color:var(--accent);background:rgba(110,231,255,.05)}.mp-option-btn:disabled{cursor:default;opacity:.7}.mp-option-btn.mp-selected{border-color:var(--accent);background:rgba(110,231,255,.12)}.mp-option-label{display:inline-block;width:24px;height:24px;line-height:24px;text-align:center;border-radius:6px;background:var(--border);font-weight:700;font-size:13px;margin-right:8px}.mp-answered-dots{display:flex;gap:6px;justify-content:center;margin-top:8px}.mp-answered-dot{width:10px;height:10px;border-radius:50%;background:var(--border)}.mp-answered-dot.done{background:var(--accent)}.mp-result-correct{padding:12px 16px;border-radius:12px;background:rgba(34,197,94,.12);color:#22c55e;font-weight:700;font-size:18px;text-align:center}.mp-result-wrong{padding:12px 16px;border-radius:12px;background:rgba(239,68,68,.12);color:#ef4444;font-weight:700;font-size:18px;text-align:center}.mp-review-explanation{margin-top:16px}.mp-review-q{font-weight:600;margin-bottom:10px}.mp-review-options{display:flex;flex-direction:column;gap:6px;margin-bottom:10px}.mp-review-opt{padding:8px 12px;border-radius:8px;border:1px solid var(--border);font-size:14px}.mp-review-opt.mp-review-correct{border-color:#22c55e;background:rgba(34,197,94,.08);color:#22c55e}.mp-review-opt.mp-review-wrong{border-color:#ef4444;background:rgba(239,68,68,.08);color:#ef4444}.mp-review-exp{color:var(--muted);font-size:14px}.mp-leaderboard{overflow-x:auto}.mp-lb-table{width:100%;border-collapse:collapse;font-size:14px;margin-top:8px}.mp-lb-table th{text-align:left;padding:8px 10px;border-bottom:1px solid var(--border);color:var(--muted);font-weight:600;font-size:12px;text-transform:uppercase}.mp-lb-table td{padding:8px 10px;border-bottom:1px solid var(--border)}.mp-lb-table tr.mp-lb-you td{color:var(--accent);font-weight:600}.mp-lb-score{font-weight:700;text-align:right!important}.mp-lb-table th:last-child{text-align:right}.mp-podium{display:flex;align-items:flex-end;justify-content:center;gap:12px;margin:24px auto 0;max-width:400px}.mp-podium-place{flex:1;text-align:center;border-radius:12px 12px 0 0;padding:16px 8px 12px;background:var(--bg);border:1px solid var(--border);border-bottom:none;position:relative}.mp-podium-1{order:2;min-height:160px}.mp-podium-2{order:1;min-height:120px}.mp-podium-3{order:3;min-height:90px}.mp-podium-bar{position:absolute;bottom:0;left:0;right:0;height:4px;border-radius:0 0 2px 2px}.mp-podium-1 .mp-podium-bar{background:linear-gradient(90deg,#fbbf24,#f59e0b)}.mp-podium-2 .mp-podium-bar{background:linear-gradient(90deg,#94a3b8,#cbd5e1)}.mp-podium-3 .mp-podium-bar{background:linear-gradient(90deg,#d97706,#b45309)}.mp-podium-medal{margin-bottom:8px}.mp-medal{display:inline-block;padding:4px 10px;border-radius:8px;font-weight:700;font-size:14px}.mp-medal.gold{background:#fbbf24;color:#000}.mp-medal.silver{background:#94a3b8;color:#000}.mp-medal.bronze{background:#d97706;color:#000}.mp-podium-name{font-weight:600;font-size:14px;margin-top:4px}.mp-podium-score{font-size:12px;color:var(--muted);margin-top:2px}.mp-stats-card{margin-top:20px;padding:16px;border-radius:12px;background:var(--bg);border:1px solid var(--border)}.mp-stats-grid{display:flex;gap:24px;justify-content:center;margin-top:12px;flex-wrap:wrap}.mp-stat{text-align:center}.mp-stat-val{display:block;font-size:24px;font-weight:700;color:var(--accent)}.mp-stat-label{font-size:12px;color:var(--muted)}body.theme-light .mp-opt-btn.active{background:rgba(59,130,246,.1);color:var(--accent)}body.theme-light .mp-room-code{background:var(--card)}body.theme-light .mp-player-card{background:var(--card)}body.theme-light .mp-option-btn{background:var(--card)}body.theme-light .mp-podium-place{background:var(--card)}body.theme-light .mp-stats-card{background:var(--card)}.mp-report-section{border-top:1px solid var(--border);padding-top:12px}.mp-report-form{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.mp-report-input{flex:1;min-width:120px;padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:13px}.mp-report-select{padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:13px}.mp-report-btn{background:rgba(248,113,113,.1)!important;border-color:rgba(248,113,113,.3)!important;color:#f87171!important}.mp-report-btn:hover{background:rgba(248,113,113,.2)!important}body.theme-light .mp-report-input{background:rgba(0,0,0,.03)}body.theme-light .mp-report-select{background:var(--card)}.mp-skip-vote-btn{border-style:dashed!important;opacity:.7}.mp-skip-vote-btn:hover{opacity:1}.mp-live-pick{display:inline-block;margin-left:8px;padding:1px 6px;border-radius:8px;background:rgba(110,231,255,.12);color:var(--accent);font-size:10px;font-weight:700;vertical-align:middle;animation:fadeInPick .3s ease}@keyframes fadeInPick{from{opacity:0;transform:scale(.8)}to{opacity:1;transform:scale(1)}}body.theme-light .mp-live-pick{background:rgba(59,130,246,.1);color:var(--accent)}.mp-room-chat{border-top:1px solid var(--border);padding-top:12px}.mp-chat-toggle{cursor:pointer;font-size:13px;font-weight:600;color:var(--accent);list-style:none;-webkit-user-select:none;user-select:none}.mp-chat-toggle::-webkit-details-marker{display:none}.mp-chat-messages{max-height:180px;min-height:60px;overflow-y:auto;padding:8px;border:1px solid var(--border);border-radius:8px;background:rgba(0,0,0,.15);margin:8px 0}.mp-chat-msg{font-size:12px;line-height:1.4;padding:3px 0;word-break:break-word}.mp-chat-msg-me{color:var(--accent)}.mp-chat-msg-them{color:var(--text)}.mp-chat-msg strong{font-weight:700;margin-right:4px}.mp-chat-input-row{display:flex;gap:6px}.mp-chat-input{flex:1;padding:6px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:12px;font-family:inherit}.mp-chat-input:focus{outline:0;border-color:var(--accent)}body.theme-light .mp-chat-messages{background:rgba(0,0,0,.03)}body.theme-light .mp-chat-input{background:rgba(0,0,0,.02)}.mp-game-panel{border-top:1px solid var(--border);padding-top:10px}.mp-game-panel.hidden{display:none}.mp-game-panel-players{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding:0 0 8px;font-size:12px}.mp-gp-player{display:inline-block;padding:2px 8px;border-radius:10px;font-size:11px;font-weight:600}.mp-gp-online{background:rgba(52,211,153,.12);color:#34d399}.mp-gp-offline{background:rgba(248,113,113,.08);color:#f87171;opacity:.6}.mp-gp-pick{margin-left:4px;padding:1px 5px;border-radius:6px;background:rgba(110,231,255,.15);color:var(--accent);font-size:10px;font-weight:700}body.theme-light .mp-gp-online{background:rgba(16,185,129,.1);color:#059669}body.theme-light .mp-gp-offline{background:rgba(239,68,68,.06);color:#dc2626}.mp-game-panel-header{display:flex;align-items:center;justify-content:space-between;gap:8px}.mp-game-panel-header .mp-game-panel-players{flex:1}.mp-leave-game-btn{background:0 0;border:1px solid var(--border);border-radius:8px;color:var(--muted);font-size:11px;font-weight:600;padding:4px 10px;cursor:pointer;white-space:nowrap;transition:color .2s,border-color .2s}.mp-leave-game-btn:hover{color:#f87171;border-color:#f87171}.mp-stuck-banner{padding:10px 14px;border-radius:10px;margin-bottom:12px;background:rgba(249,115,22,.08);border:1px solid rgba(249,115,22,.2);display:flex;align-items:center;justify-content:space-between;gap:8px}.mp-stuck-banner p{margin:0;color:#f97316}.mp-stuck-banner .btn{white-space:nowrap}.mp-lobby-live{display:inline-block;padding:1px 6px;border-radius:4px;background:rgba(52,211,153,.15);color:#34d399;font-size:9px;font-weight:700;text-transform:uppercase;margin-left:6px;vertical-align:middle}.mp-ready-badge{color:#34d399;font-size:14px}.mp-notready-badge{color:var(--muted);font-size:14px}.mp-kick-btn{margin-left:auto;background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:14px;padding:2px 6px;border-radius:4px}.mp-kick-btn:hover{color:#f87171;background:rgba(248,113,113,.1)}.mp-result-skip{color:var(--muted);font-weight:700;font-size:16px}.costudy-votes{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0;padding:8px;border-radius:8px;background:rgba(255,255,255,.03)}.costudy-vote{font-size:12px;font-weight:600;padding:4px 10px;border-radius:8px}.costudy-vote-correct{background:rgba(52,211,153,.15);color:#34d399}.costudy-vote-wrong{background:rgba(248,113,113,.15);color:#f87171}.costudy-vote-skip{background:rgba(255,255,255,.06);color:var(--muted)}.mp-friend-invite-list{display:flex;flex-direction:column;gap:4px}.mp-invite-friend-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:6px 10px;border-radius:8px;background:rgba(255,255,255,.03)}.mp-mm-range-row{display:flex;align-items:center;gap:8px}.mp-mm-select{padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:13px;font-weight:600}body.theme-light .mp-mm-select{background:var(--card)}.mp-online-indicator{display:flex;align-items:center;gap:8px;justify-content:center;margin-top:16px;padding:8px 14px;border-radius:10px;background:rgba(255,255,255,.03);border:1px solid var(--border)}.mp-online-dot{width:8px;height:8px;border-radius:50%;background:#34d399;box-shadow:0 0 6px rgba(52,211,153,.5);animation:onlinePulse 2s ease-in-out infinite}@keyframes onlinePulse{0%,100%{opacity:1}50%{opacity:.5}}body.theme-light .mp-online-indicator{background:rgba(0,0,0,.02)}.mp-matchmaking-section{margin-top:20px;padding-top:20px;border-top:1px solid var(--border)}.mp-mm-divider{text-align:center;color:var(--muted);font-size:13px;margin-bottom:16px;position:relative}.mp-mm-divider::after,.mp-mm-divider::before{content:"";position:absolute;top:50%;width:calc(50% - 60px);height:1px;background:var(--border)}.mp-mm-divider::before{left:0}.mp-mm-divider::after{right:0}.mp-mm-config{margin-top:16px}.mp-mm-row{margin-bottom:12px}.mp-lobby-browser{max-height:300px;overflow-y:auto;margin-top:12px}.mp-lobby-item{display:flex;align-items:center;gap:12px;padding:10px 14px;border:1px solid var(--border);border-radius:10px;margin-bottom:6px;transition:border-color .2s}.mp-lobby-item:hover{border-color:var(--accent)}.mp-lobby-info{flex:1;display:flex;flex-direction:column;gap:2px}.mp-lobby-slots{font-weight:700;font-size:14px;color:var(--accent);flex-shrink:0}.mm-find-btn{font-size:15px;padding:12px 32px;background:linear-gradient(135deg,var(--accent),var(--accent2));border:none;color:#0b1220;font-weight:700}.mm-find-btn:hover{transform:scale(1.02);filter:brightness(1.1)}.mm-found-title{font-size:22px;margin-bottom:16px;animation:mmFoundPulse 1s ease-in-out}@keyframes mmFoundPulse{0%{transform:scale(.8);opacity:0}50%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}.mm-accept-players{display:flex;align-items:center;justify-content:center;gap:12px;flex-wrap:wrap;margin:16px 0}.mm-accept-player{padding:10px 16px;border-radius:12px;background:rgba(255,255,255,.06);border:1px solid var(--border);font-weight:600;font-size:14px;display:flex;align-items:center;gap:6px}.mm-accept-vs{font-size:16px;font-weight:800;color:var(--accent)}.mm-accept-check{font-size:14px}.mm-accept-waiting{font-size:14px;opacity:.6}.mm-accept-timer-wrap{margin:16px auto;max-width:260px}.mm-accept-timer-bar{height:6px;border-radius:3px;background:rgba(255,255,255,.08);overflow:hidden}.mm-accept-timer-fill{height:100%;border-radius:3px;width:100%;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .2s linear}.mm-accept-actions{display:flex;gap:12px;justify-content:center}.mm-accept-btn{min-width:140px;font-size:15px}.mm-decline-btn{min-width:100px}.mm-queue-animation{position:relative;width:100px;height:100px;margin:24px auto}.mm-pulse-ring{position:absolute;inset:0;border-radius:50%;border:3px solid var(--accent);opacity:.3;animation:mmPulse 2s ease-in-out infinite}.mm-pulse-icon{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:36px}@keyframes mmPulse{0%{transform:scale(.8);opacity:.3}50%{transform:scale(1.2);opacity:.8}100%{transform:scale(.8);opacity:.3}}.mm-queue-status{font-size:16px;font-weight:600;margin:16px 0 4px}.team-badge{display:inline-block;padding:2px 8px;border-radius:8px;font-size:11px;font-weight:700;text-transform:uppercase}.team-badge.small{padding:1px 6px;font-size:10px}.team-a{background:rgba(96,165,250,.2);color:#60a5fa;border:1px solid rgba(96,165,250,.3)}.team-b{background:rgba(251,146,60,.2);color:#fb923c;border:1px solid rgba(251,146,60,.3)}.mp-team-banner{display:flex;align-items:center;justify-content:center;gap:12px;margin-bottom:12px;font-size:14px;font-weight:600}.mp-player-card.team-a{border-left:3px solid #60a5fa}.mp-player-card.team-b{border-left:3px solid #fb923c}.team-result-banner{display:flex;align-items:center;justify-content:center;gap:16px;padding:16px;margin:16px 0;border-radius:var(--radius);background:rgba(255,255,255,.04);border:1px solid var(--border)}.team-score-side{text-align:center;flex:1}.team-result-pts{display:block;font-size:24px;font-weight:800;margin-top:6px;color:var(--accent)}.team-result-vs{font-size:16px;font-weight:700;color:var(--text);padding:0 12px}body.theme-light .team-a{background:rgba(96,165,250,.1)}body.theme-light .team-b{background:rgba(251,146,60,.1)}.domain-breakdown{margin-top:24px;padding:20px;border-radius:var(--radius);background:rgba(255,255,255,.03);border:1px solid var(--border)}.domain-breakdown h4{margin:0 0 16px 0;font-size:16px;color:var(--accent)}.domain-row{display:grid;grid-template-columns:1fr 120px 80px 70px;gap:8px;align-items:center;padding:8px 0;border-bottom:1px solid rgba(255,255,255,.04)}.domain-row:last-child{border-bottom:none}.domain-label{font-size:13px;color:var(--text);line-height:1.3}.domain-bar-wrap{height:8px;border-radius:4px;background:rgba(255,255,255,.06);overflow:hidden}.domain-bar{height:100%;border-radius:4px;transition:width .6s ease}.domain-bar-great{background:linear-gradient(90deg,#34d399,#6ee7b7)}.domain-bar-good{background:linear-gradient(90deg,#60a5fa,#93c5fd)}.domain-bar-okay{background:linear-gradient(90deg,#fbbf24,#fcd34d)}.domain-bar-weak{background:linear-gradient(90deg,#f87171,#fca5a5)}.domain-score{font-size:12px;color:var(--muted);text-align:right;white-space:nowrap}.domain-mastery{font-size:11px;color:var(--muted);text-align:right;opacity:.7}.domain-row-weak .domain-label{color:#f87171}.domain-row-weak .domain-score{color:#f87171}@media(max-width:640px){.domain-row{grid-template-columns:1fr;gap:4px}.domain-bar-wrap{width:100%}.domain-mastery,.domain-score{text-align:left}}body.theme-light .domain-breakdown{background:rgba(0,0,0,.02)}body.theme-light .domain-bar-wrap{background:rgba(0,0,0,.06)}body.theme-light .domain-row{border-bottom-color:rgba(0,0,0,.06)}.objectives-exam{margin-bottom:32px}.objectives-exam h3{color:var(--accent);margin-bottom:12px}.domain-list{list-style:none;padding:0;margin:0}.domain-list li{padding:10px 16px;border-bottom:1px solid var(--border);display:flex;justify-content:space-between;align-items:center}.domain-list li{flex-wrap:wrap}.domain-list li:last-child{border-bottom:none}.domain-weight{color:var(--accent);font-weight:600;font-size:14px;flex-shrink:0}.domain-link{color:inherit;text-decoration:none;font-weight:500;transition:color .15s ease}.domain-link:hover{color:var(--accent);text-decoration:underline}.domain-subtopics{flex-basis:100%;margin-top:10px}.domain-subtopics>summary{cursor:pointer;color:var(--muted);font-size:13px;padding:4px 0;list-style:none;user-select:none}.domain-subtopics>summary::-webkit-details-marker{display:none}.domain-subtopics>summary:hover{color:var(--accent)}.domain-subtopics[open]>summary{color:var(--accent)}.subtopic-list{list-style:none;padding:8px 0 4px 12px;margin:0;display:flex;flex-direction:column;gap:4px;border-left:2px solid var(--border)}.subtopic-list li{display:block;padding:6px 10px;border-bottom:none;border-radius:6px;transition:background .15s ease}.subtopic-list li:hover{background:rgba(110,231,255,.06)}.subtopic-link{color:var(--text);text-decoration:none;font-size:13px;display:block}.subtopic-link:hover{color:var(--accent)}.topic-focus-banner{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;margin-bottom:16px;border-radius:10px;background:rgba(110,231,255,.08);border:1px solid rgba(110,231,255,.3);font-size:14px}.topic-focus-banner strong{color:var(--accent)}.backload-stopped-notice{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:10px 14px;margin:0 0 12px;border-radius:10px;background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.3);font-size:13px;color:var(--text)}.cert-mastery-summary{margin:12px 0;padding:12px 16px;border-radius:var(--radius);background:rgba(255,255,255,.03);border:1px solid var(--border)}.cert-mastery-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.cert-mastery-label{font-size:13px;font-weight:600;color:var(--muted)}.cert-mastery-pct{font-size:16px;font-weight:800}.cert-mastery-great{color:#34d399}.cert-mastery-good{color:#60a5fa}.cert-mastery-okay{color:#fbbf24}.cert-mastery-weak{color:#f87171}.cert-mastery-bar-track{height:8px;border-radius:4px;background:rgba(255,255,255,.06);overflow:hidden}.cert-mastery-bar{height:100%;border-radius:4px;transition:width .6s ease}.cert-mastery-bar-great{background:linear-gradient(90deg,#34d399,#6ee7b7)}.cert-mastery-bar-good{background:linear-gradient(90deg,#60a5fa,#93c5fd)}.cert-mastery-bar-okay{background:linear-gradient(90deg,#fbbf24,#fcd34d)}.cert-mastery-bar-weak{background:linear-gradient(90deg,#f87171,#fca5a5)}.cert-mastery-detail{display:block;margin-top:4px;color:var(--muted)}.cert-test-stats{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px;padding-top:8px;border-top:1px solid var(--border)}.cert-test-stat{font-size:12px;color:var(--muted)}.cert-test-stat strong{color:var(--text)}.lb-diff-dot{font-size:10px;font-weight:700;margin-left:4px}body.theme-light .cert-mastery-summary{background:rgba(0,0,0,.02)}body.theme-light .cert-mastery-bar-track{background:rgba(0,0,0,.06)}.domain-mini-mastery{display:flex;align-items:center;gap:6px;margin-left:auto;flex-shrink:0}.domain-mini-bar-track{display:inline-block;width:50px;height:6px;border-radius:3px;background:rgba(255,255,255,.06);overflow:hidden;vertical-align:middle}.domain-mini-bar{display:block;height:100%;border-radius:3px;transition:width .4s ease}.domain-mini-bar-great{background:#34d399}.domain-mini-bar-good{background:#60a5fa}.domain-mini-bar-okay{background:#fbbf24}.domain-mini-bar-weak{background:#f87171}.domain-mini-pct{font-size:11px;font-weight:700;min-width:28px;text-align:right}.domain-mini-detail{font-size:10px;min-width:30px;text-align:right}.domain-reset-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:14px;padding:0 4px;opacity:.5;transition:opacity .2s,color .2s}.domain-reset-btn:hover{opacity:1;color:#f87171}body.theme-light .domain-mini-bar-track{background:rgba(0,0,0,.06)}.domain-list li{flex-wrap:wrap;gap:6px}.profile-dropdown{position:relative;flex-shrink:0;order:9}.profile-btn{display:flex;align-items:center;gap:8px;background:var(--card);border:1px solid var(--border);border-radius:50px;padding:4px 14px 4px 4px;cursor:pointer;color:var(--text);font-weight:700;font-size:13px;transition:background .2s,border-color .2s}.profile-btn:hover{border-color:var(--accent)}.profile-avatar{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:900;font-size:13px;flex-shrink:0;line-height:1}.profile-avatar-emoji{background:rgba(255,255,255,.1);font-size:18px;color:inherit}.profile-name{max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-panel{display:none;position:absolute;top:calc(100% + 8px);right:0;width:280px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:200;overflow:hidden}.profile-dropdown.open .profile-panel{display:block}.profile-panel-header{display:flex;align-items:center;gap:12px;padding:16px;border-bottom:1px solid var(--border)}.profile-panel-avatar{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:900;font-size:16px;flex-shrink:0;line-height:1}.profile-panel-info{min-width:0}.profile-panel-name{font-weight:700;font-size:15px;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-panel-email{color:var(--muted);margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.profile-level-badge{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:50%;font-size:11px;font-weight:900;line-height:1;flex-shrink:0;margin-left:2px}.level-tier-bronze{background:linear-gradient(135deg,#cd7f32,sienna);color:#fff}.level-tier-silver{background:linear-gradient(135deg,silver,#8a8a8a);color:#1a1a2e}.level-tier-gold{background:linear-gradient(135deg,gold,#daa520);color:#1a1a2e}.level-tier-platinum{background:linear-gradient(135deg,#e5e4e2,#b0c4de);color:#1a1a2e;box-shadow:0 0 8px rgba(176,196,222,.5)}.level-tier-diamond{background:linear-gradient(135deg,#b9f2ff,#00d4ff,#7b68ee);color:#0b1220;box-shadow:0 0 12px rgba(0,212,255,.6)}.profile-xp-section{padding:12px 16px;border-bottom:1px solid var(--border)}.profile-xp-header{display:flex;align-items:center;gap:8px;margin-bottom:6px}.profile-xp-level{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;font-size:12px;font-weight:900;flex-shrink:0}.profile-xp-title{font-weight:700;font-size:13px;color:var(--text)}.profile-xp-total{margin-left:auto;font-size:12px;color:var(--muted);font-weight:600}.profile-xp-bar{height:6px;border-radius:3px;background:var(--border);overflow:hidden}.profile-xp-fill{height:100%;border-radius:3px;transition:width .6s ease}.profile-xp-fill.level-tier-bronze{background:linear-gradient(90deg,#cd7f32,#daa520)}.profile-xp-fill.level-tier-silver{background:linear-gradient(90deg,#a0a0a0,#d0d0d0)}.profile-xp-fill.level-tier-gold{background:linear-gradient(90deg,#daa520,gold)}.profile-xp-fill.level-tier-platinum{background:linear-gradient(90deg,#8faabe,#e5e4e2)}.profile-xp-fill.level-tier-diamond{background:linear-gradient(90deg,#00d4ff,#7b68ee)}.profile-xp-next{margin-top:4px;color:var(--muted);font-size:11px}.xp-reward{text-align:center;margin:16px 0;padding:16px;background:rgba(255,255,255,.04);border-radius:var(--radius);border:1px solid var(--border);animation:xpSlideIn .5s ease}@keyframes xpSlideIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.xp-reward-earned{font-size:24px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.xp-reward-level{display:flex;align-items:center;justify-content:center;gap:8px;margin:8px 0}.xp-reward-badge{display:inline-flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;font-size:14px;font-weight:900}.xp-reward-title{font-weight:700;font-size:14px;color:var(--text)}.xp-reward-bar{height:8px;border-radius:4px;background:rgba(255,255,255,.08);overflow:hidden;max-width:200px;margin:8px auto}.xp-reward-fill{height:100%;border-radius:4px;transition:width 1s ease}.xp-reward-fill.level-tier-bronze{background:linear-gradient(90deg,#cd7f32,#daa520)}.xp-reward-fill.level-tier-silver{background:linear-gradient(90deg,#a0a0a0,#d0d0d0)}.xp-reward-fill.level-tier-gold{background:linear-gradient(90deg,#daa520,gold)}.xp-reward-fill.level-tier-platinum{background:linear-gradient(90deg,#8faabe,#e5e4e2)}.xp-reward-fill.level-tier-diamond{background:linear-gradient(90deg,#00d4ff,#7b68ee)}.xp-reward-text{color:var(--muted);margin-top:4px}.level-up-modal{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.7);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);opacity:0;transition:opacity .3s ease}.level-up-modal.visible{opacity:1}.level-up-content{text-align:center;padding:40px 48px;background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:0 20px 60px rgba(0,0,0,.5);transform:scale(.8);transition:transform .3s ease}.level-up-modal.visible .level-up-content{transform:scale(1)}.level-up-modal.milestone .level-up-content{border-color:var(--accent);box-shadow:0 0 40px rgba(110,231,255,.2),0 20px 60px rgba(0,0,0,.5)}.level-up-icon{font-size:48px;margin-bottom:8px;animation:levelBounce .6s ease}@keyframes levelBounce{0%,100%{transform:scale(1)}50%{transform:scale(1.3)}}.level-up-heading{font-size:22px;font-weight:900;color:var(--text);margin-bottom:12px;text-transform:uppercase;letter-spacing:1px}.level-up-badge{display:inline-flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;font-size:28px;font-weight:900;margin:8px auto}.level-up-title{font-size:18px;font-weight:700;color:var(--accent);margin:8px 0}.level-up-tier{font-size:13px;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:2px;margin-bottom:8px}.level-up-dismiss{margin-top:16px;padding:10px 32px}.profile-cert-section{padding:10px 16px;border-bottom:1px solid var(--border)}.profile-cert-label{color:var(--muted);font-weight:600;margin-bottom:6px}.profile-cert-grid{display:flex;flex-wrap:wrap;gap:6px}.profile-cert-badge{display:flex;align-items:center;gap:4px;padding:4px 8px;border-radius:20px;background:rgba(255,255,255,.06);border:1px solid var(--cert-color,var(--border));font-size:11px;cursor:default}.profile-cert-icon{font-size:14px}.profile-cert-exam{font-weight:700;color:var(--text);white-space:nowrap}.cert-badge-modal{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.75);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);opacity:0;transition:opacity .3s ease}.cert-badge-modal.visible{opacity:1}.cert-badge-content{text-align:center;padding:40px 48px;background:var(--card);border:2px solid var(--cert-color,var(--accent));border-radius:16px;box-shadow:0 0 40px rgba(0,0,0,.4),0 0 80px color-mix(in srgb,var(--cert-color,var(--accent)) 30%,transparent);transform:scale(.8);transition:transform .3s ease}.cert-badge-modal.visible .cert-badge-content{transform:scale(1)}.cert-badge-icon{font-size:56px;margin-bottom:4px;animation:certBounce .7s ease}@keyframes certBounce{0%{transform:scale(0) rotate(-20deg)}60%{transform:scale(1.2) rotate(5deg)}100%{transform:scale(1) rotate(0)}}.cert-badge-heading{font-size:18px;font-weight:900;color:var(--text);text-transform:uppercase;letter-spacing:1px;margin-bottom:12px}.cert-badge-shield{display:inline-flex;align-items:center;justify-content:center;width:80px;height:80px;margin:8px auto;border-radius:50%;background:conic-gradient(from 0deg,var(--cert-color),transparent 70%,var(--cert-color));box-shadow:0 0 24px color-mix(in srgb,var(--cert-color) 40%,transparent);position:relative}.cert-badge-shield::before{content:"";position:absolute;inset:4px;border-radius:50%;background:var(--card)}.cert-badge-pct{position:relative;z-index:1;font-size:22px;font-weight:900;color:var(--cert-color)}.cert-badge-exam{font-size:20px;font-weight:900;color:var(--text);margin-top:12px}.cert-badge-label{font-size:15px;font-weight:700;color:var(--cert-color);margin:4px 0}.cert-badge-desc{font-size:13px;color:var(--muted);margin-bottom:4px}.cert-badge-dismiss{margin-top:16px;padding:10px 32px}.profile-picker-toggle{display:flex;align-items:center;justify-content:space-between;width:100%;padding:10px 16px;border:none;background:0 0;color:var(--muted);font-size:13px;font-weight:600;cursor:pointer;transition:color .2s}.profile-picker-toggle:hover{color:var(--text)}.profile-picker-chevron{transition:transform .2s ease}.profile-picker-toggle.open .profile-picker-chevron{transform:rotate(180deg)}.profile-picker-submenu{max-height:0;overflow:hidden;transition:max-height .25s ease}.profile-picker-submenu.open{max-height:360px;overflow-y:auto}.profile-picker-grid{display:flex;flex-wrap:wrap;gap:6px;padding:4px 16px 12px}.profile-picker-item{width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid transparent;cursor:pointer;background:rgba(255,255,255,.06);font-size:16px;transition:border-color .2s,transform .15s}.profile-picker-item:hover{transform:scale(1.15);border-color:rgba(255,255,255,.2)}.profile-picker-item.selected{border-color:var(--accent);box-shadow:0 0 8px rgba(110,231,255,.3)}.profile-picker-letters{font-size:11px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220}.profile-bg-label{padding:8px 16px 4px;color:var(--muted);font-weight:600}.profile-bg-grid{display:flex;flex-wrap:wrap;gap:5px;padding:2px 16px 10px}.profile-bg-item{width:24px;height:24px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:border-color .2s,transform .15s}.profile-bg-item:hover{transform:scale(1.2);border-color:rgba(255,255,255,.3)}.profile-bg-item.selected{border-color:var(--accent);box-shadow:0 0 6px rgba(110,231,255,.3)}.profile-bg-none{display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.06);color:var(--muted);font-size:11px;font-weight:700}body.theme-light .profile-bg-none{background:rgba(0,0,0,.06)}.profile-panel-links{border-top:1px solid var(--border);padding:8px}.profile-panel-links a,.profile-panel-links button{display:block;width:100%;text-align:left;padding:10px 12px;border-radius:10px;font-size:14px;font-weight:600;color:var(--text);background:0 0;border:none;cursor:pointer;text-decoration:none;transition:background .2s}.profile-panel-links a:hover,.profile-panel-links button:hover{background:rgba(255,255,255,.06)}.profile-logout-btn{color:#f87171!important}.profile-logout-btn:hover{color:#fca5a5!important}.notif-bell-wrap{position:relative;flex-shrink:0;order:11}.notif-bell-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;padding:6px;display:flex;align-items:center;position:relative;transition:color .2s}.notif-bell-btn:hover{color:var(--text)}.notif-badge{position:absolute;top:0;right:0;min-width:16px;height:16px;border-radius:8px;background:#f87171;color:#fff;font-size:10px;font-weight:700;display:flex;align-items:center;justify-content:center;padding:0 4px;line-height:1}.notif-panel{position:absolute;top:calc(100% + 8px);right:0;width:300px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:200;max-height:400px;overflow:hidden;display:flex;flex-direction:column}.notif-panel-header{display:flex;justify-content:space-between;align-items:center;padding:12px 14px;border-bottom:1px solid var(--border);font-size:14px}.notif-header-btns{display:flex;gap:8px}.notif-list{overflow-y:auto;max-height:340px}.notif-item{display:flex;gap:10px;padding:10px 14px;border-bottom:1px solid rgba(255,255,255,.04);cursor:pointer;transition:background .15s;position:relative}.notif-delete-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:16px;padding:0 4px;opacity:.5;flex-shrink:0;align-self:center}.notif-delete-btn:hover{opacity:1;color:#f87171}.notif-action-btn{padding:3px 8px;border-radius:6px;border:1px solid var(--accent);background:rgba(110,231,255,.08);color:var(--accent);cursor:pointer;font-size:11px;font-weight:600;flex-shrink:0;align-self:center;transition:background .2s}.notif-action-btn:hover{background:rgba(110,231,255,.2)}.notif-action-done{border-color:#34d399;color:#34d399;background:rgba(52,211,153,.08)}.notif-item:hover{background:rgba(255,255,255,.04)}.notif-item:last-child{border-bottom:none}.notif-item-unread{background:rgba(110,231,255,.04)}.notif-icon{font-size:18px;flex-shrink:0;padding-top:2px}.notif-content{flex:1;min-width:0}.notif-msg{font-size:13px;display:block;line-height:1.4}.notif-time{color:var(--muted);display:block;margin-top:2px}body.theme-light .notif-panel{background:#fff}body.theme-light .notif-item:hover{background:rgba(0,0,0,.03)}body.theme-light .notif-item-unread{background:rgba(59,130,246,.04)}@media(max-width:600px){.notif-panel{width:260px;right:-40px}}.account-locked-banner{text-align:center;padding:24px;border:2px solid rgba(248,113,113,.3);border-radius:var(--radius);background:rgba(248,113,113,.05)}.account-locked-banner p{color:var(--muted);margin:8px 0}.account-danger-zone{border-top:1px solid var(--border);padding-top:12px}.account-delete-btn{background:rgba(248,113,113,.1)!important;border-color:rgba(248,113,113,.3)!important;color:#f87171!important;font-size:13px}.account-delete-btn:hover{background:rgba(248,113,113,.2)!important;border-color:#f87171!important}.account-avatar-section{margin-top:20px}.oauth-links-section{display:flex;flex-direction:column;gap:8px}.oauth-link-row{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:10px;background:rgba(255,255,255,.04)}.oauth-link-icon{display:flex;align-items:center;flex-shrink:0}.oauth-link-label{font-weight:600;flex:1}.oauth-link-status{font-size:12px;padding:2px 8px;border-radius:12px}.oauth-link-status.linked{background:rgba(46,204,113,.15);color:#2ecc71}.oauth-link-btn,.oauth-unlink-btn{font-size:13px;cursor:pointer}.oauth-unlink-btn{color:var(--muted)}.oauth-unlink-btn:hover{color:#e74c3c}.oauth-link-success{color:#2ecc71;font-weight:600;margin:0 0 4px;animation:fadeIn .3s ease}@keyframes fadeIn{from{opacity:0;transform:translateY(-4px)}to{opacity:1;transform:translateY(0)}}.account-avatar-grid{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px}.account-avatar-option{width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;border:2px solid transparent;cursor:pointer;background:rgba(255,255,255,.06);font-size:22px;transition:border-color .2s,transform .15s}.account-avatar-option:hover{transform:scale(1.12);border-color:rgba(255,255,255,.2)}.account-avatar-option.selected{border-color:var(--accent);box-shadow:0 0 10px rgba(110,231,255,.25)}.account-avatar-letters{font-size:15px;font-weight:900;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220}.account-avatar-upload{color:var(--muted);overflow:hidden}.account-avatar-upload-img{width:100%;height:100%;object-fit:cover;border-radius:50%}.badges-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:10px}.badge-item{display:flex;flex-direction:column;align-items:center;gap:4px;padding:14px 10px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.03);text-align:center}.badge-icon{font-size:28px;line-height:1}.badge-name{font-size:12px;font-weight:700;color:var(--text)}.badge-earned{border-color:rgba(110,231,255,.25);background:rgba(110,231,255,.06)}.badge-locked{opacity:.35;filter:grayscale(1)}.badge-credly-link{color:var(--accent);text-decoration:underline;font-size:10px}.badges-credly-row{display:flex;gap:8px;align-items:center}.badges-credly-row input{flex:1}.badge-picker{display:flex;gap:6px;flex-wrap:wrap}.badge-pick{padding:6px 12px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);cursor:pointer;font-size:12px;font-weight:600;font-family:inherit;transition:border-color .2s,background .2s}.badge-pick:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.15)}.badge-pick-active{border-color:var(--accent);background:rgba(110,231,255,.1);color:var(--accent)}.public-profile-header{display:flex;gap:16px;align-items:center}.public-profile-avatar{width:64px;height:64px;border-radius:50%;font-size:28px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:900;flex-shrink:0}.public-profile-name{margin:0;font-size:24px}.public-profile-meta{display:flex;gap:10px;align-items:center;margin-top:4px}.public-profile-level{font-weight:700;font-size:13px;color:var(--accent);background:rgba(110,231,255,.1);padding:2px 8px;border-radius:6px}.public-profile-display-badge{font-size:14px}.mp-badge-icon{font-size:14px;margin-left:4px;vertical-align:middle}body.theme-light .badge-item{background:rgba(0,0,0,.02)}body.theme-light .badge-earned{background:rgba(59,130,246,.06);border-color:rgba(59,130,246,.2)}body.theme-light .badge-pick{background:rgba(0,0,0,.03)}body.theme-light .badge-pick:hover{background:rgba(0,0,0,.06)}body.theme-light .badge-pick-active{background:rgba(59,130,246,.1);border-color:var(--accent)}body.theme-light .profile-btn{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.1)}body.theme-light .profile-btn:hover{background:rgba(0,0,0,.08)}body.theme-light .profile-panel{background:var(--card);border-color:var(--border)}body.theme-light .profile-picker-item{background:rgba(0,0,0,.04)}body.theme-light .profile-panel-links a:hover,body.theme-light .profile-panel-links button:hover{background:rgba(0,0,0,.04)}body.theme-light .profile-cert-badge{background:rgba(0,0,0,.04)}body.theme-light .cert-badge-content{background:#fff;border-color:var(--cert-color,rgba(0,0,0,.12));box-shadow:0 0 40px rgba(0,0,0,.1),0 0 60px color-mix(in srgb,var(--cert-color,var(--accent)) 15%,transparent)}body.theme-light .profile-xp-bar,body.theme-light .xp-reward-bar{background:rgba(0,0,0,.08)}body.theme-light .xp-reward{background:rgba(0,0,0,.03)}body.theme-light .level-up-content{background:#fff;border-color:rgba(0,0,0,.12);box-shadow:0 20px 60px rgba(0,0,0,.15)}body.theme-light .account-avatar-option{background:rgba(0,0,0,.04)}@media(max-width:768px){.profile-name{display:none}.profile-btn{padding:4px}.profile-panel{right:-8px;width:260px}}.more-dropdown{position:relative;flex-shrink:0;order:9}.signin-btn{display:flex;align-items:center;gap:6px;background:rgba(110,231,255,.06);border:1px solid var(--accent);border-radius:50px;padding:6px 14px;cursor:pointer;color:var(--accent);font-weight:700;font-size:13px;transition:background .2s,border-color .2s,box-shadow .2s;box-shadow:0 0 8px rgba(110,231,255,.25),0 0 20px rgba(110,231,255,.1);animation:signinGlow 2.5s ease-in-out infinite}@keyframes signinGlow{0%,100%{box-shadow:0 0 8px rgba(110,231,255,.25),0 0 20px rgba(110,231,255,.1)}50%{box-shadow:0 0 12px rgba(110,231,255,.4),0 0 30px rgba(110,231,255,.15)}}.signin-btn:hover{background:rgba(110,231,255,.12);box-shadow:0 0 16px rgba(110,231,255,.5),0 0 40px rgba(110,231,255,.2)}.signin-btn svg{flex-shrink:0}.more-panel{display:none;position:absolute;top:calc(100% + 8px);right:0;width:280px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);z-index:200;padding:16px}.more-dropdown.open .more-panel{display:block}.signin-panel-header{font-size:14px;font-weight:800;color:var(--text);margin-bottom:12px;text-align:center}.signin-oauth-row{display:flex;justify-content:center;gap:10px;margin-bottom:10px}.signin-oauth-btn{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:10px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);transition:background .2s,border-color .2s;cursor:pointer}.signin-oauth-btn:hover{background:rgba(255,255,255,.12);border-color:rgba(255,255,255,.2)}.signin-divider{display:flex;align-items:center;gap:10px;margin:10px 0;color:var(--muted);font-size:12px;font-weight:600}.signin-divider::after,.signin-divider::before{content:"";flex:1;height:1px;background:var(--border)}.signin-email-row{display:flex;gap:6px}.signin-email-input{flex:1;padding:8px 10px;border-radius:8px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--text);font-size:13px;outline:0;transition:border-color .2s}.signin-email-input:focus{border-color:var(--accent)}.signin-email-btn{padding:8px 14px;font-size:13px;white-space:nowrap}.signin-error{color:#f87171;margin-top:6px;font-size:12px}.signin-create-row{text-align:center;margin-top:12px;padding-top:10px;border-top:1px solid var(--border)}.signin-create-link{font-size:13px;font-weight:700;color:var(--accent);text-decoration:none}.signin-create-link:hover{text-decoration:underline}body.theme-light .signin-btn{background:rgba(0,0,0,.04)}body.theme-light .signin-oauth-btn{background:rgba(0,0,0,.04);border-color:rgba(0,0,0,.1)}body.theme-light .signin-oauth-btn:hover{background:rgba(0,0,0,.08)}body.theme-light .signin-email-input{background:rgba(0,0,0,.03)}body.theme-light .more-panel{background:var(--card);border-color:var(--border)}@media(max-width:768px){.more-btn-label{display:none}.signin-btn{padding:8px;border-radius:50%}.more-panel{right:-8px;width:260px}}.blog-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;max-width:900px;margin:0 auto}.blog-card{text-decoration:none;color:var(--text);transition:border-color .3s,transform .2s,box-shadow .3s;display:flex;flex-direction:column;max-width:none;margin:0}.blog-card:hover{border-color:rgba(110,231,255,.25);transform:translateY(-3px);box-shadow:0 4px 20px rgba(110,231,255,.08)}.blog-card-title{font-size:17px;font-weight:700;margin-bottom:10px;color:var(--text);line-height:1.3}.blog-card-excerpt{margin-bottom:auto;padding-bottom:12px;line-height:1.6;flex:1}.blog-card-meta{display:flex;gap:6px;color:var(--muted);padding-top:12px;border-top:1px solid var(--border);font-size:12px}body.theme-light .blog-card:hover{border-color:rgba(59,130,246,.25);box-shadow:0 4px 20px rgba(59,130,246,.08)}.blog-content{line-height:1.7;font-size:15px}.blog-content h2{color:var(--accent);margin:28px 0 12px;font-size:20px}.blog-content h3{margin:24px 0 10px;font-size:17px}.blog-content p{margin:0 0 16px}.blog-content ol,.blog-content ul{margin:0 0 16px;padding-left:24px}.blog-content li{margin-bottom:6px}.blog-content strong{color:var(--text)}.blog-post-meta{color:var(--muted);font-size:14px}.blog-cta{background:rgba(110,231,255,.03);border-color:rgba(110,231,255,.15)}.blog-nav{margin-bottom:24px}body.theme-light .blog-cta{background:rgba(59,130,246,.03);border-color:rgba(59,130,246,.1)}.pathway-exam-select{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:24px}.pathway-exam-btn{display:flex;align-items:flex-start;gap:12px;text-align:left;padding:16px;border-radius:14px;border:1px solid var(--border);background:rgba(255,255,255,.03);color:var(--text);cursor:pointer;font-weight:700;font-size:13px;transition:all .15s;font-family:inherit}.pathway-exam-info{display:flex;flex-direction:column;gap:2px}.pathway-exam-name{font-size:15px;font-weight:800}.pathway-exam-codes{color:var(--muted)}.pathway-exam-jobs{font-size:11px;line-height:1.3;margin-top:4px}.pathway-exam-salary{font-size:12px;font-weight:700;color:#34d399;margin-top:2px}.pathway-section-header{display:flex;justify-content:space-between;align-items:center;padding:12px 0;margin-top:16px;border-bottom:2px solid var(--accent)}.pathway-section-header h2{margin:0;font-size:18px}.pathway-section-pct{color:var(--muted);font-weight:600}.pathway-exam-btn:hover{border-color:rgba(110,231,255,.3);background:rgba(110,231,255,.05)}.pathway-exam-btn.active{border-color:var(--accent);background:rgba(110,231,255,.1)}.pathway-exam-icon{width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:900;font-size:12px}.pathway-header{margin-bottom:20px}.pathway-overall-progress{margin-top:8px}.pathway-progress-bar-track{height:10px;border-radius:5px;background:rgba(255,255,255,.06);overflow:hidden}.pathway-progress-bar-fill{height:100%;border-radius:5px;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .4s ease}.pathway-chapter{margin-bottom:16px;border:1px solid var(--border);border-radius:var(--radius);padding:16px;background:rgba(255,255,255,.02)}.pathway-chapter-complete{border-color:rgba(52,211,153,.3)}.pathway-chapter-header{display:flex;justify-content:space-between;align-items:center;gap:12px}.pathway-chapter-info{flex:1}.pathway-chapter-info h3{margin:0 0 8px;font-size:16px}.pathway-weight{color:var(--muted);font-weight:400;font-size:13px}.pathway-chapter-progress-bar{height:6px;border-radius:3px;background:rgba(255,255,255,.06);overflow:hidden;margin-bottom:4px}.pathway-chapter-fill{height:100%;border-radius:3px;background:linear-gradient(90deg,#34d399,#6ee7b7)}.pathway-check{font-size:24px}.pathway-lessons{margin-top:12px}.pathway-lesson{display:flex;align-items:center;gap:12px;padding:10px 12px;border-bottom:1px solid rgba(255,255,255,.04)}.pathway-lesson:last-child{border-bottom:none}.pathway-lesson-recommended{color:var(--accent);font-weight:600;font-size:11px}.pathway-lesson-status{flex-shrink:0;width:24px;text-align:center}.pathway-lesson-icon{font-size:16px}.pathway-lesson-current{color:var(--accent)}.pathway-lesson-info{flex:1;min-width:0}.pathway-lesson-title{font-size:13px;display:block}.pathway-lesson-score{color:#34d399;display:block;margin-top:2px}.pathway-lesson-complete .pathway-lesson-title{color:var(--muted)}.pathway-start-btn{flex-shrink:0}body.theme-light .pathway-chapter{background:rgba(0,0,0,.02)}body.theme-light .pathway-exam-btn{background:rgba(0,0,0,.02)}body.theme-light .pathway-chapter-progress-bar,body.theme-light .pathway-progress-bar-track{background:rgba(0,0,0,.06)}@media(max-width:600px){.pathway-exam-select{grid-template-columns:1fr}}.faq-category{margin-bottom:32px}.faq-category-title{font-size:18px;color:var(--accent);margin-bottom:12px;padding-bottom:8px;border-bottom:1px solid var(--border)}.faq-item{margin-bottom:8px;cursor:pointer}.faq-question{font-weight:700;font-size:15px;padding:14px 16px;list-style:none;display:flex;align-items:center;justify-content:space-between}.faq-question::after{content:"+";font-size:20px;font-weight:400;color:var(--muted);transition:transform .2s}details[open] .faq-question::after{content:"\2212";transform:rotate(180deg)}.faq-answer{padding:0 16px 16px;font-size:14px;line-height:1.6;color:var(--muted)}.faq-answer p{margin:0 0 10px}.faq-answer ul{margin:0 0 10px;padding-left:20px}.faq-answer li{margin-bottom:4px}.faq-answer strong{color:var(--text)}.faq-answer a{color:var(--accent)}.faq-bottom{margin-top:32px}.faq-bottom p{margin:0}body.theme-light .faq-category-title{border-bottom-color:rgba(0,0,0,.1)}.history-stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;text-align:center}.history-stat-value{font-size:24px;font-weight:800;color:var(--accent)}.history-stat-label{margin-top:4px;color:var(--muted)}.history-filter{display:flex;flex-wrap:wrap;gap:8px;margin:16px 0;justify-content:center}.history-filter-btn{font-size:12px;padding:6px 14px;border-radius:20px}.history-filter-btn.selected{background:var(--accent);color:#0b1220}.history-card{margin-bottom:12px;transition:border-color .3s,transform .2s}.history-card:hover{border-color:rgba(110,231,255,.2);transform:translateY(-2px)}.history-card-header{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.history-score{font-size:18px;font-weight:800;white-space:nowrap}.history-score.great{color:#34d399}.history-score.good{color:#60a5fa}.history-score.okay{color:#fbbf24}.history-score.needs-work{color:#f87171}.history-domains{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}.history-domain-tag{font-size:11px;padding:3px 8px;border-radius:6px;background:rgba(255,255,255,.06);color:var(--muted)}.domain-tag-weak{color:#f87171;background:rgba(248,113,113,.08);border:1px solid rgba(248,113,113,.2)}.history-review-btns{display:flex;align-items:center;gap:8px;margin-top:10px}.history-review-sep{color:var(--border);font-size:12px}.history-review-toggle.active-review{color:var(--accent);font-weight:700}.history-review{margin-top:12px;max-height:400px;overflow-y:auto}.history-q-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:6px}.history-q-num{font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px;background:rgba(255,255,255,.08);color:var(--muted)}.history-q-badge{font-size:11px;font-weight:700;padding:2px 8px;border-radius:10px}.badge-correct{color:#34d399;background:rgba(52,211,153,.1)}.badge-wrong{color:#f87171;background:rgba(248,113,113,.1)}.history-question-wrong{border-left:3px solid #f87171;padding-left:12px}.history-question{padding:12px 0;border-top:1px solid var(--border)}.history-q-text{font-weight:600;font-size:14px;margin-bottom:6px}.history-q-domain{color:var(--accent);margin-bottom:8px}.history-q-options{list-style:none;padding:0;margin:0 0 8px}.history-q-options li{padding:6px 10px;border-radius:8px;margin-bottom:4px;font-size:13px;border:1px solid transparent}.history-opt-correct{border-color:#34d399;background:rgba(52,211,153,.1);color:#34d399}.history-opt-wrong{border-color:#f87171;background:rgba(248,113,113,.1);color:#f87171}.history-q-explain{color:var(--muted);font-style:italic;padding:6px 10px;background:rgba(255,255,255,.03);border-radius:8px}@media(max-width:600px){.history-stats-grid{grid-template-columns:repeat(2,1fr)}}.obj-fab{position:fixed;bottom:24px;right:24px;z-index:150;width:52px;height:52px;border-radius:50%;border:none;cursor:pointer;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;display:flex;align-items:center;justify-content:center;box-shadow:0 4px 16px rgba(0,0,0,.3);transition:transform .2s,opacity .2s}.obj-fab:hover{transform:scale(1.1)}.obj-fab.hidden{opacity:0;pointer-events:none;transform:scale(.8)}.obj-overlay{position:fixed;inset:0;z-index:149;background:rgba(0,0,0,.45);opacity:0;pointer-events:none;transition:opacity .3s}.obj-overlay.open{opacity:1;pointer-events:auto}.obj-sidebar{position:fixed;top:0;right:0;z-index:151;width:400px;max-width:100vw;height:100vh;background:var(--card);border-left:1px solid var(--border);box-shadow:-4px 0 24px rgba(0,0,0,.3);transform:translateX(100%);transition:transform .3s ease,width .3s ease;display:flex;flex-direction:column;overflow:hidden;outline:0}.obj-sidebar.open{transform:translateX(0)}.obj-sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);flex-shrink:0}.obj-sidebar-title{font-weight:800;font-size:16px;color:var(--text)}.obj-sidebar-close{background:0 0;border:none;color:var(--muted);font-size:24px;cursor:pointer;padding:0 4px;line-height:1}.obj-sidebar-close:hover{color:var(--text)}.obj-sidebar-content{flex:1;overflow-y:auto;padding:12px 0}.obj-exam{border-bottom:1px solid var(--border)}.obj-exam-header{display:flex;align-items:center;gap:8px;width:100%;padding:14px 20px;border:none;background:0 0;color:var(--text);font-size:14px;font-weight:700;cursor:pointer;text-align:left;transition:background .2s}.obj-exam-header:hover{background:rgba(255,255,255,.04)}.obj-chevron{font-size:10px;color:var(--muted);width:14px;flex-shrink:0}.obj-exam-body{padding:0 20px 16px 20px}.obj-exam-body.hidden{display:none}.obj-domain{margin-bottom:12px}.obj-domain-header{display:flex;align-items:center;justify-content:space-between;width:100%;padding:6px 0;border:none;background:0 0;color:var(--text);font-size:13px;font-weight:600;cursor:pointer;text-align:left}.obj-domain-header:hover{color:var(--accent)}.obj-domain-weight{font-size:11px;font-weight:700;color:var(--accent);background:rgba(110,231,255,.08);padding:2px 8px;border-radius:6px;flex-shrink:0}.obj-mastery-row{display:flex;align-items:center;gap:8px;margin-top:4px}.obj-mastery-bar-wrap{flex:1;height:6px;border-radius:3px;background:rgba(255,255,255,.08);overflow:hidden}.obj-mastery-bar{height:100%;border-radius:3px;transition:width .4s ease}.obj-bar-great{background:linear-gradient(90deg,#34d399,#10b981)}.obj-bar-good{background:linear-gradient(90deg,#60a5fa,#3b82f6)}.obj-bar-okay{background:linear-gradient(90deg,#fbbf24,#f59e0b)}.obj-bar-weak{background:linear-gradient(90deg,#f87171,#ef4444)}.obj-mastery-pct{font-size:11px;color:var(--muted);min-width:32px;text-align:right}.obj-subtopics{list-style:none;padding:4px 0 0 16px;margin:0}.obj-subtopics.hidden{display:none}.obj-subtopics li{font-size:12px;color:var(--muted);padding:3px 0;line-height:1.4;position:relative;padding-left:12px}.obj-subtopics li::before{content:"\2022";position:absolute;left:0;color:var(--border)}.obj-guide-section{margin-bottom:0}.obj-guide-body{padding:0 20px 12px 20px}.obj-guide-body.hidden{display:none}.obj-guide-link{display:flex;align-items:center;gap:8px;padding:8px 10px;border-radius:8px;margin:2px 0;font-size:13px;font-weight:600;color:var(--text);text-decoration:none;transition:background .15s}.obj-guide-link:hover{background:rgba(255,255,255,.06)}.obj-guide-link svg{flex-shrink:0;color:var(--accent)}.obj-guide-divider{border-top:1px solid rgba(255,255,255,.06);margin:16px 0 12px}.obj-pdf-link{display:block;font-size:12px;color:var(--accent);padding:8px 0 4px;text-decoration:none;font-weight:600}.obj-pdf-link:hover{text-decoration:underline}.obj-sidebar.obj-sidebar-pdf{width:600px}.obj-pdf-viewer{display:flex;flex-direction:column;height:100%;padding:16px 20px}.obj-pdf-back-btn{background:0 0;border:none;color:var(--accent);font-size:13px;font-weight:600;cursor:pointer;padding:0 0 8px;text-align:left;align-self:flex-start}.obj-pdf-back-btn:hover{text-decoration:underline}.obj-pdf-title{font-size:14px;font-weight:700;color:var(--text);margin:0 0 12px}.obj-pdf-iframe{flex:1;width:100%;border:1px solid var(--border);border-radius:8px;background:#fff;min-height:400px}.obj-pdf-fallback{font-size:12px;color:var(--muted);margin:8px 0 0;text-align:center}.obj-pdf-fallback a{color:var(--accent)}body.theme-light .obj-sidebar{background:var(--card);border-color:var(--border)}body.theme-light .obj-exam-header:hover{background:rgba(0,0,0,.03)}body.theme-light .obj-mastery-bar-wrap{background:rgba(0,0,0,.06)}body.theme-light .obj-overlay{background:rgba(0,0,0,.25)}@media(max-width:700px){.obj-sidebar{width:100vw}.obj-sidebar.obj-sidebar-pdf{width:100vw}.obj-fab{bottom:16px;right:16px;width:48px;height:48px}}.chat-sidebar{position:fixed;top:0;left:0;z-index:153;width:var(--chat-width,400px);max-width:100vw;height:calc(100vh / var(--zoom,1));background:var(--card);border-right:1px solid var(--border);box-shadow:4px 0 24px rgba(0,0,0,.3);transform:translateX(-100%);transition:transform .3s ease;display:flex;flex-direction:column;overflow:hidden;outline:0}.chat-sidebar.open{transform:translateX(0)}.chat-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);flex-shrink:0}.chat-mascot{width:104px;height:104px;border-radius:50%;margin-right:10px;flex-shrink:0;object-fit:cover;object-position:center 30%;border:2px solid rgba(110,231,255,.3)}.chat-header-name{display:flex;flex-direction:column}.chat-header-title{font-weight:800;font-size:16px;color:var(--text)}.chat-header-lang{font-size:11px;color:var(--muted)}.chat-nav-mascot{width:72px;height:72px;border-radius:50%;object-fit:cover;object-position:center 30%;border:2px solid rgba(110,231,255,.3);box-shadow:0 0 10px rgba(110,231,255,.3),0 0 20px rgba(110,231,255,.15);animation:mascotGlow 2.5s ease-in-out infinite}@keyframes mascotGlow{0%,100%{box-shadow:0 0 10px rgba(110,231,255,.3),0 0 20px rgba(110,231,255,.15)}50%{box-shadow:0 0 14px rgba(110,231,255,.5),0 0 28px rgba(110,231,255,.25)}}.chat-close-btn{background:0 0;border:none;color:var(--muted);font-size:24px;cursor:pointer;padding:0 4px;line-height:1}.chat-header-btns{display:flex;align-items:center;gap:8px}.chat-clear-btn,.chat-memory-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;padding:2px;line-height:1;display:flex;align-items:center}.chat-clear-btn:hover,.chat-memory-btn:hover{color:var(--text)}.chat-msg-checkbox{position:absolute;top:8px;left:8px;width:16px;height:16px;accent-color:var(--accent);cursor:pointer;z-index:5}.chat-msg{position:relative}.chat-select-bar{display:flex;gap:6px;padding:8px;background:rgba(255,255,255,.04);border-radius:8px;margin-bottom:8px;position:sticky;top:0;z-index:10}.chat-select-bar .btn{font-size:11px;padding:4px 10px}.chat-close-btn:hover{color:var(--text)}.chat-memories-overlay{position:absolute;top:0;left:0;right:0;bottom:0;z-index:20;background:var(--bg);overflow-y:auto}.chat-memories-panel{padding:16px}.chat-memories-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.chat-memories-close{background:0 0;border:none;color:var(--muted);font-size:22px;cursor:pointer;padding:0 4px;line-height:1}.chat-memories-close:hover{color:var(--text)}.chat-memories-title{font-weight:600;font-size:.95rem;margin:0;color:var(--text)}.chat-memories-empty{color:var(--muted);font-size:.85rem}.chat-memory-item{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 10px;margin-bottom:6px;border-radius:8px;background:rgba(255,255,255,.05);font-size:.85rem;color:var(--text)}body.theme-light .chat-memory-item{background:rgba(0,0,0,.04)}.chat-memory-text{flex:1;word-break:break-word}.chat-memory-delete{background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:1.1rem;padding:0 2px;line-height:1;flex-shrink:0}.chat-memory-delete:hover{color:var(--danger,#e74c3c)}.chat-memories-clear-all{margin-top:12px;width:100%;padding:8px;border:1px solid var(--muted);border-radius:8px;background:0 0;color:var(--muted);cursor:pointer;font-size:.82rem}.chat-memories-clear-all:hover:not(:disabled){color:var(--danger,#e74c3c);border-color:var(--danger,#e74c3c)}.chat-memories-clear-all:disabled{opacity:.4;cursor:not-allowed}.chat-history-overlay{position:absolute;top:0;left:0;right:0;bottom:0;z-index:20;background:var(--bg);overflow-y:auto}.chat-history-panel{padding:16px}.chat-history-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.chat-history-title{font-weight:600;font-size:.95rem;margin:0;color:var(--text)}.chat-history-close{background:0 0;border:none;color:var(--muted);font-size:22px;cursor:pointer;padding:0 4px;line-height:1}.chat-history-close:hover{color:var(--text)}.chat-history-toggle-row{padding:10px 12px;border-radius:10px;margin-bottom:12px;background:rgba(255,255,255,.04);border:1px solid var(--border)}.chat-history-toggle-label{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--text);cursor:pointer}.chat-history-toggle{width:16px;height:16px;cursor:pointer;accent-color:var(--accent)}.chat-history-toggle-hint{display:block;font-size:11px;color:var(--muted);margin-top:4px;line-height:1.4}body.theme-light .chat-history-toggle-row{background:rgba(0,0,0,.03)}.chat-history-item{display:flex;align-items:center;gap:8px;padding:10px 12px;margin-bottom:6px;border-radius:8px;background:rgba(255,255,255,.04);cursor:pointer;transition:background .15s}.chat-history-item:hover{background:rgba(255,255,255,.08)}.chat-history-current{border-left:3px solid var(--accent)}body.theme-light .chat-history-item{background:rgba(0,0,0,.03)}body.theme-light .chat-history-item:hover{background:rgba(0,0,0,.06)}.chat-history-item-info{flex:1;min-width:0}.chat-history-item-title{display:block;font-size:13px;font-weight:600;color:var(--text);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.chat-history-item-meta{display:block;font-size:11px;color:var(--muted);margin-top:2px}.chat-history-delete-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;font-size:16px;padding:2px 4px;flex-shrink:0}.chat-history-delete-btn:hover{color:#f87171}.chat-history-clear-all{margin-top:8px;width:100%;padding:8px;border:1px solid var(--muted);border-radius:8px;background:0 0;color:var(--muted);cursor:pointer;font-size:12px}.chat-history-clear-all:hover{color:#f87171;border-color:#f87171}.chat-history-btn{background:0 0;border:none;color:var(--muted);cursor:pointer;padding:4px;border-radius:4px;display:flex;align-items:center;justify-content:center}.chat-history-btn:hover{color:var(--text);background:rgba(255,255,255,.08)}.chat-resize-handle{position:absolute;top:0;right:-4px;width:8px;height:100%;cursor:col-resize;z-index:1;background:0 0}.chat-resize-handle.dragging,.chat-resize-handle:hover{background:var(--accent);opacity:.3}.chat-messages{flex:1;overflow-y:auto;padding:16px 16px 8px;display:flex;flex-direction:column;gap:10px}.chat-empty{color:var(--muted);font-size:14px;text-align:center;margin-top:40px}.chat-msg{max-width:85%;padding:10px 14px;border-radius:14px;font-size:13px;line-height:1.5;word-wrap:break-word}.chat-msg-user{align-self:flex-end;background:linear-gradient(135deg,var(--accent),#4f8eff);color:#fff;border-bottom-right-radius:4px}.chat-msg-ai{align-self:flex-start;background:rgba(255,255,255,.06);color:var(--text);border-bottom-left-radius:4px;border:1px solid var(--border)}.chat-msg-ai code.chat-code{background:rgba(0,0,0,.2);padding:1px 5px;border-radius:4px;font-size:12px}.chat-list{margin:6px 0;padding-left:20px;font-size:13px;line-height:1.5}.chat-list li{margin-bottom:3px}.chat-hr{border:none;border-top:1px solid rgba(255,255,255,.1);margin:8px 0}.chat-h2{display:block;font-size:15px;margin:8px 0 4px}.chat-h3{display:block;font-size:14px;margin:6px 0 3px}body.theme-light .chat-hr{border-top-color:rgba(0,0,0,.1)}.chat-typing{display:flex;gap:4px;padding:12px 16px}.chat-dot{width:8px;height:8px;border-radius:50%;background:var(--muted);animation:chatBounce .6s infinite alternate}.chat-dot:nth-child(2){animation-delay:.2s}.chat-dot:nth-child(3){animation-delay:.4s}@keyframes chatBounce{to{opacity:.3;transform:translateY(-4px)}}.chat-action-btn{display:inline-block;margin:6px 4px 2px 0;padding:6px 14px;background:var(--accent);color:#000;border:none;border-radius:8px;font-size:12px;font-weight:700;cursor:pointer;transition:opacity .2s}.chat-action-btn:hover{opacity:.85}.chat-retry-btn{display:inline-flex;align-items:center;gap:4px;margin:8px 0 0;padding:4px 10px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:6px;color:var(--muted);font-size:11px;font-weight:600;cursor:pointer;transition:color .2s,border-color .2s,background .2s}.chat-retry-btn:hover{color:var(--accent);border-color:var(--accent);background:rgba(110,231,255,.06)}.chat-retry-btn svg{flex-shrink:0}body.theme-light .chat-retry-btn{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.1)}body.theme-light .chat-retry-btn:hover{background:rgba(0,0,0,.06);border-color:var(--accent)}.chat-hw-image-wrap{margin:8px 0}.chat-hw-image{display:block;text-decoration:none;color:inherit;border-radius:10px;overflow:hidden;background:rgba(255,255,255,.04);border:1px solid var(--border);transition:border-color .2s}.chat-hw-image:hover{border-color:var(--accent)}.chat-hw-image img{width:100%;max-height:200px;object-fit:contain;display:block;background:rgba(255,255,255,.02)}.chat-hw-caption{display:block;padding:6px 10px;color:var(--muted);font-size:11px;text-align:center}.chat-video-link{display:flex;align-items:center;gap:10px;padding:8px;margin:8px 0;border-radius:10px;background:rgba(255,255,255,.06);text-decoration:none;color:inherit;transition:background .2s}.chat-video-link:hover{background:rgba(255,255,255,.12)}.chat-video-icon{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border-radius:10px;flex-shrink:0;background:linear-gradient(135deg,var(--accent),var(--accent2));color:var(--bg)}.chat-video-info{display:flex;flex-direction:column;justify-content:center;min-width:0}.chat-video-title{font-size:13px;font-weight:700;color:var(--text);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.chat-video-channel{font-size:11px;color:var(--muted);margin-top:2px}.chat-quick-actions{padding:0 16px 12px;display:flex;flex-direction:column;gap:8px}.chat-quick-actions.hidden{display:none}.chat-quick-btn{width:100%;padding:12px 16px;background:rgba(255,255,255,.04);border:1px solid var(--border);border-radius:10px;color:var(--text);font-size:13px;text-align:left;cursor:pointer;transition:background .2s,border-color .2s}.chat-quick-btn:hover{background:rgba(255,255,255,.08);border-color:var(--accent)}.chat-input-area{display:flex;align-items:flex-end;gap:8px;padding:12px 16px;border-top:1px solid var(--border);flex-shrink:0}.chat-input{flex:1;resize:none;border:1px solid var(--border);border-radius:10px;padding:10px 14px;background:rgba(255,255,255,.04);color:var(--text);font-size:13px;font-family:inherit;line-height:1.4;outline:0;transition:border-color .2s;max-height:120px}.chat-input:focus{border-color:var(--accent)}.chat-input::placeholder{color:var(--muted)}.chat-mic-btn{width:36px;height:36px;border-radius:50%;border:1px solid var(--border);background:rgba(255,255,255,.06);color:var(--muted);cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:background .2s,color .2s,border-color .2s}.chat-mic-btn:hover{color:var(--text);border-color:var(--accent)}.chat-mic-btn.recording{background:rgba(239,68,68,.15);border-color:#ef4444;color:#ef4444;animation:micPulse 1s ease-in-out infinite}@keyframes micPulse{0%,100%{opacity:1}50%{opacity:.5}}.chat-mic-btn.hidden{display:none}.chat-send-btn{width:36px;height:36px;border-radius:50%;border:none;background:var(--accent);color:#000;cursor:pointer;display:flex;align-items:center;justify-content:center;flex-shrink:0;transition:opacity .2s}.chat-send-btn:hover{opacity:.85}.chat-send-btn:disabled{opacity:.4;cursor:default}.chat-nav-btn{height:30px;padding:0 12px;border-radius:16px;border:1px solid var(--accent);background:rgba(110,231,255,.08);color:var(--accent);cursor:pointer;display:flex;align-items:center;gap:5px;flex-shrink:0;transition:background .2s,color .2s,border-color .2s;font-size:12px;font-weight:700;font-family:inherit;position:absolute;left:16px;top:50%;transform:translateY(-50%)}.chat-nav-btn:hover{background:var(--accent);color:#000;border-color:var(--accent)}.chat-nav-label{white-space:nowrap}body.theme-light .chat-sidebar{background:var(--card);border-color:var(--border)}body.theme-light .chat-msg-ai{background:rgba(0,0,0,.03)}body.theme-light .chat-msg-ai code.chat-code{background:rgba(0,0,0,.06)}body.theme-light .chat-quick-btn{background:rgba(0,0,0,.02)}body.theme-light .chat-quick-btn:hover{background:rgba(0,0,0,.05)}body.theme-light .chat-input{background:rgba(0,0,0,.02)}body.theme-light .chat-nav-btn{background:rgba(0,0,0,.04);border-color:var(--accent);color:var(--accent)}body.theme-light .chat-nav-btn:hover{background:var(--accent);color:#fff}@media(max-width:700px){.chat-sidebar{width:100vw}.chat-resize-handle{display:none}.chat-nav-label{display:none}.chat-nav-btn{position:static;transform:none;width:30px;padding:0;border-radius:50%;justify-content:center}}.lb-board-tabs{display:flex;gap:4px;margin-bottom:16px}.lb-board-tab{padding:10px 20px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);cursor:pointer;font-weight:700;font-size:14px;transition:all .15s}.lb-board-tab.active{color:var(--accent);background:rgba(110,231,255,.12);border-color:rgba(110,231,255,.4)}.lb-controls{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;margin-bottom:20px}.lb-tabs{display:flex;gap:4px}.lb-tab{padding:8px 18px;border-radius:10px;border:1px solid var(--border);background:rgba(255,255,255,.04);color:var(--muted);cursor:pointer;font-weight:600;font-size:13px;transition:all .15s}.lb-tab.active{color:var(--accent);background:rgba(110,231,255,.08);border-color:rgba(110,231,255,.3)}.lb-select{padding:8px 12px;border-radius:10px;border:1px solid var(--border);background:var(--card);color:var(--text);font-size:13px}.lb-header-row,.lb-row{display:grid;grid-template-columns:48px 1fr 100px 60px 110px 70px;align-items:center;padding:10px 12px;gap:8px;font-size:14px}.lb-header-row{font-weight:700;font-size:12px;text-transform:uppercase;color:var(--muted);border-bottom:1px solid var(--border)}.lb-row{border-bottom:1px solid rgba(255,255,255,.04);transition:background .15s}.lb-row:hover{background:rgba(110,231,255,.04)}.lb-top-1{background:rgba(255,215,0,.06)}.lb-top-2{background:rgba(192,192,192,.04)}.lb-top-3{background:rgba(205,127,50,.04)}.lb-you-row{background:rgba(110,231,255,.08);border-left:3px solid var(--accent)}.lb-col-rank{text-align:center;font-weight:700}.lb-col-user{display:flex;align-items:center;gap:8px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lb-profile-link{color:var(--text);text-decoration:none}.lb-profile-link:hover{color:var(--accent);text-decoration:underline}.lb-avatar{font-size:18px;display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;flex-shrink:0;background:rgba(255,255,255,.06)}body.theme-light .lb-avatar{background:rgba(0,0,0,.04)}.lb-col-score{font-weight:600}#lbXpTable .lb-header-row,#lbXpTable .lb-row{grid-template-columns:48px 1fr 80px 100px 1fr}.lb-col-level{text-align:center}.lb-level-badge{display:inline-block;padding:4px 10px;border-radius:8px;background:linear-gradient(135deg,var(--accent),var(--accent2));color:#0b1220;font-weight:800;font-size:12px}.lb-col-xp{font-weight:600;font-variant-numeric:tabular-nums}.lb-xp-bar{height:8px;border-radius:8px;background:rgba(255,255,255,.08);overflow:hidden}.lb-xp-fill{height:100%;border-radius:8px;background:linear-gradient(90deg,var(--accent),var(--accent2));transition:width .4s}#lbTestTable .lb-header-row,#lbTestTable .lb-row{grid-template-columns:48px 1fr 100px 100px 90px}#lbMpTable .lb-header-row,#lbMpTable .lb-row{grid-template-columns:48px 1fr 120px}.lb-col-wins{font-weight:700;font-size:16px}.lb-test-badge{display:inline-block;padding:2px 6px;border-radius:4px;background:rgba(167,139,250,.2);color:var(--accent2);font-size:10px;font-weight:700;letter-spacing:.5px;vertical-align:middle}.lb-xp-badge{display:inline-block;padding:2px 6px;border-radius:4px;background:rgba(110,231,255,.1);color:var(--accent);font-size:10px;font-weight:600;margin-left:4px}@media(max-width:700px){.lb-header-row,.lb-row{grid-template-columns:36px 1fr 70px 90px;font-size:13px}.lb-col-diff,.lb-col-time{display:none}.lb-board-tabs{flex-wrap:wrap}.lb-board-tab{font-size:12px;padding:8px 14px}#lbXpTable .lb-header-row,#lbXpTable .lb-row{grid-template-columns:36px 1fr 60px 80px}.lb-col-xpprog{display:none}#lbTestTable .lb-header-row,#lbTestTable .lb-row{grid-template-columns:36px 1fr 70px 70px}#lbTestTable .lb-col-exam{display:none}#lbMpTable .lb-header-row,#lbMpTable .lb-row{grid-template-columns:36px 1fr 80px}}body.theme-light .lb-board-tab{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.1)}body.theme-light .lb-board-tab.active{background:rgba(59,130,246,.12);border-color:rgba(59,130,246,.4);color:var(--accent)}body.theme-light .lb-tab{background:rgba(0,0,0,.03);border-color:rgba(0,0,0,.1)}body.theme-light .lb-tab.active{background:rgba(59,130,246,.08);border-color:rgba(59,130,246,.3);color:var(--accent)}body.theme-light .lb-select{background:#fff;border-color:rgba(0,0,0,.12)}body.theme-light .lb-row:hover{background:rgba(59,130,246,.04)}body.theme-light .lb-top-1{background:rgba(255,215,0,.08)}body.theme-light .lb-top-2{background:rgba(192,192,192,.06)}body.theme-light .lb-top-3{background:rgba(205,127,50,.06)}body.theme-light .lb-you-row{background:rgba(59,130,246,.08)}body.theme-light .lb-level-badge{color:#fff}body.theme-light .lb-xp-bar{background:rgba(0,0,0,.08)}.study-section-heading{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--muted);margin:24px 0 0;padding-bottom:6px;border-bottom:1px solid var(--border)}.study-section-heading:first-of-type{margin-top:12px}.study-mode-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-top:16px}.study-mode-card{display:flex;flex-direction:column;align-items:center;gap:8px;padding:24px 16px;border-radius:16px;border:1px solid var(--border);background:rgba(255,255,255,.03);cursor:pointer;transition:all .15s;text-align:center;color:var(--text);font-family:inherit}.study-mode-card:hover{border-color:var(--accent);background:rgba(110,231,255,.05);transform:translateY(-2px)}.study-domain-select{width:100%;padding:8px 12px;border-radius:8px;border:1px solid var(--border);background:var(--bg);color:var(--text);font-size:13px;margin-top:4px}.study-domain-select option{background:var(--bg);color:var(--text)}body.theme-light .study-domain-select{background:#fff}body.theme-light .study-domain-select option{background:#fff;color:#333}.study-mode-icon{font-size:32px}.study-mode-link{text-decoration:none}.study-mode-link:hover{text-decoration:none}.study-mode-disabled{opacity:.5;cursor:not-allowed;pointer-events:none}.study-section-subhead{margin:6px 0 0}.study-badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:11px;font-weight:600;background:rgba(110,231,255,.1);color:var(--accent);margin-top:4px;max-width:100%;white-space:normal;text-align:center}.study-progress{display:flex;justify-content:space-between;margin-bottom:16px}.study-card-container{perspective:800px;cursor:pointer;min-height:250px}.study-card{position:relative;width:100%;min-height:250px;transform-style:preserve-3d;transition:transform .5s ease}.study-card.flipped{transform:rotateY(180deg)}.study-card-back,.study-card-front{position:absolute;inset:0;backface-visibility:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 24px;border-radius:16px;border:1px solid var(--border);background:rgba(255,255,255,.04)}.study-card-back{transform:rotateY(180deg);background:rgba(110,231,255,.04)}.study-question-text{font-size:18px;line-height:1.5;text-align:center}.study-answer-text{font-size:20px;font-weight:700;color:var(--accent);text-align:center}.study-explanation{margin-top:12px;text-align:center;color:var(--text)}.study-tap-hint{margin-top:16px;font-size:18px;font-weight:700;color:var(--accent)}.study-actions{display:flex;justify-content:center;gap:12px;margin-top:16px}.study-action-btn{padding:10px 24px;border-radius:12px;border:1px solid var(--border);background:rgba(255,255,255,.04);cursor:pointer;font-size:14px;font-weight:600;transition:all .15s;color:var(--text);font-family:inherit}.study-action-btn.study-right:hover{border-color:#6bcf7f;background:rgba(107,207,127,.1)}.study-action-btn.study-wrong:hover{border-color:#e06c75;background:rgba(224,108,117,.1)}.study-nav{display:flex;justify-content:center;gap:8px}.study-results-stats{display:flex;justify-content:center;gap:32px;margin:24px 0}.study-stat{display:flex;flex-direction:column;align-items:center;gap:4px}.study-stat-num{font-size:28px;font-weight:700;color:var(--accent)}body.theme-light .study-mode-card{background:rgba(0,0,0,.02)}body.theme-light .study-mode-card:hover{background:rgba(59,130,246,.05);border-color:var(--accent)}body.theme-light .study-card-back,body.theme-light .study-card-front{background:rgba(0,0,0,.02)}body.theme-light .study-card-back{background:rgba(59,130,246,.04)}body.theme-light .study-action-btn{background:rgba(0,0,0,.02)}