:root{--bg-main:#060b14;--card-bg:#0b1322;--card-border:#1a273f;--text-main:#f1f5f9;--text-muted:#94a3b8;--text-heading:#fff;--input-bg:#121d33;--input-border:#223454;--opt-bg:#121d33;--opt-border:#223454;--opt-hover:#1e2e4c;--opt-text:#e2e8f0;--accent-blue:#3b82f6;--accent-green:#10b981;--accent-red:#ef4444;--q-font-size:16px}*{box-sizing:border-box}body{background:var(--bg-main);color:var(--text-main);justify-content:center;min-height:100vh;margin:0;padding:16px;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;display:flex;overflow-x:hidden}.app-layout{gap:16px;width:100%;max-width:1550px;display:flex}.card{background:var(--card-bg);border:1px solid var(--card-border);border-radius:20px;flex:1;width:100%;height:fit-content;padding:24px;position:relative;box-shadow:0 25px 50px -12px #000000b3}.top-status-bar{border:1px solid var(--card-border);background:#0f192b;border-radius:12px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:16px;padding:10px 14px;font-size:12.5px;display:flex}.slide-viewer-panel{background:var(--card-bg);border:1px solid var(--card-border);border-radius:20px;flex-direction:column;flex:1.15;height:92vh;display:none;position:sticky;top:16px;overflow:hidden;box-shadow:0 20px 40px #000c}.slide-viewer-panel.open{display:flex}.slide-header{border-bottom:1px solid var(--card-border);background:#0f192b;justify-content:space-between;align-items:center;gap:8px;padding:12px 16px;display:flex}.slide-frame-container{background:#060b14;width:100%;height:100%;display:flex}.slide-embed{border:none;width:100%;height:100%}.tab-nav{border-bottom:1px solid var(--card-border);gap:8px;margin-bottom:16px;padding-bottom:12px;display:flex}.tab-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:10px;padding:8px 14px;font-size:13px;font-weight:700}.tab-btn:hover{color:#fff;background:#162238}.tab-btn.active{color:#60a5fa;background:#3b82f626;border-color:#3b82f6}.tab-pane{display:none}.tab-pane.active{display:block}textarea{background:var(--input-bg);border:1.5px solid var(--input-border);width:100%;height:180px;color:var(--text-main);resize:vertical;border-radius:12px;padding:14px;font-family:monospace;font-size:13px}textarea:focus{border-color:var(--accent-blue);outline:none}.btn-row{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}.btn-primary{color:#fff;cursor:pointer;background:linear-gradient(135deg,#2563eb,#1d4ed8);border:none;border-radius:10px;width:100%;padding:12px 18px;font-size:14px;font-weight:700}.btn-secondary{color:#cbd5e1;cursor:pointer;background:#142035;border:1px solid #223454;border-radius:10px;padding:9px 13px;font-size:12.5px;font-weight:600}.btn-tiny{cursor:pointer;color:#cbd5e1;background:#142035;border:1px solid #243553;border-radius:8px;padding:5px 9px;font-size:12px;font-weight:600}.badge{color:#94a3b8;background:#142035;border:1px solid #223454;border-radius:8px;padding:5px 10px;font-size:12px;font-weight:700}.q-text{font-size:var(--q-font-size);color:var(--text-heading);white-space:pre-wrap;margin-bottom:16px;font-weight:600;line-height:1.6}.option-row{align-items:stretch;gap:8px;margin:8px 0;display:flex}.option-btn{text-align:left;background:var(--opt-bg);border:1.5px solid var(--opt-border);font-size:calc(var(--q-font-size) - 1.5px);cursor:pointer;color:var(--opt-text);-webkit-user-select:none;user-select:none;border-radius:10px;flex:1;align-items:flex-start;padding:12px 16px;line-height:1.4;display:flex}.option-btn:hover:not(:disabled){background:var(--opt-hover);border-color:#3b82f6}.option-btn.eliminated{opacity:.35;text-decoration:line-through;background:#090e18!important}.option-btn.correct{font-weight:700;color:#a7f3d0!important;background:#053b2d!important;border-color:#10b981!important}.option-btn.incorrect{color:#fecaca!important;background:#5c1414!important;border-color:#ef4444!important}.eliminate-toggle-btn{background:var(--opt-bg);border:1.5px solid var(--opt-border);cursor:pointer;min-width:68px;color:var(--text-muted);border-radius:8px;flex:none;padding:0 10px;font-size:12px;font-weight:600;transition:background .15s,border-color .15s,color .15s}.eliminate-toggle-btn:hover:not(:disabled){color:#fecaca;background:#25131a;border-color:#ef4444}.eliminate-toggle-btn.active{color:#fecaca;background:#351316;border-color:#dc2626}.eliminate-toggle-btn:disabled{cursor:not-allowed;opacity:.55}.feedback-box{border-radius:12px;margin-top:16px;padding:16px;font-size:13.5px;line-height:1.5;display:none}.feedback-box.show{display:block}.feedback-box.correct-bg{color:#d1fae5;background:#04291f;border:1.5px solid #059669}.feedback-box.incorrect-bg{color:#fee2e2;background:#3b0c0c;border:1.5px solid #dc2626}.ai-assistant-container{background:#0f172a;border:1.5px solid #334155;border-radius:12px;margin-top:14px;padding:14px;display:none}.ai-assistant-container.show{display:block}.ai-header{justify-content:space-between;align-items:center;margin-bottom:10px;display:flex}.ai-quick-btn{color:#93c5fd;cursor:pointer;background:#1e293b;border:1px solid #475569;border-radius:8px;padding:6px 11px;font-size:12px;font-weight:600}.ai-quick-btn:hover{color:#fff;background:#334155}.ai-output-box{color:#e2e8f0;white-space:pre-wrap;background:#020617;border:1px solid #1e293b;border-radius:8px;margin-top:10px;padding:12px;font-size:13px;line-height:1.6;display:none}.ai-output-box.show{display:block}.palette-grid{flex-wrap:wrap;gap:4px;max-height:100px;display:flex;overflow-y:auto}.palette-btn{cursor:pointer;color:#94a3b8;background:#142035;border:1px solid #223454;border-radius:6px;justify-content:center;align-items:center;width:28px;height:28px;font-size:11.5px;font-weight:700;display:inline-flex}.palette-btn.current{transform:scale(1.08);color:#fff!important;border-color:#3b82f6!important}.palette-btn.correct{color:#a7f3d0!important;background:#064e3b!important}.palette-btn.incorrect{color:#fecaca!important;background:#7f1d1d!important}.pdf-search-input{color:#fff;background:#142035;border:1px solid #223454;border-radius:10px;width:100%;margin-bottom:12px;padding:9px 12px;font-size:13px}.pdf-search-input:focus{border-color:#3b82f6;outline:none}.question-set-panel{border:1px solid var(--card-border);background:#0f192b;border-radius:10px;gap:8px;margin:12px 0;padding:12px;display:grid}.question-set-row{gap:8px;min-width:0;display:flex}.question-set-row input,.question-set-row select{color:#f1f5f9;background:#142035;border:1px solid #223454;border-radius:8px;flex:1;min-width:0;padding:9px 10px;font-size:12.5px}.question-set-row input:focus,.question-set-row select:focus{border-color:#3b82f6;outline:none}.pdf-list-container{max-height:380px;padding-right:4px;overflow-y:auto}.pdf-list-item{border:1px solid var(--card-border);background:#0f192b;border-radius:10px;justify-content:space-between;align-items:center;margin-bottom:6px;padding:10px 14px;display:flex}.notes-drawer{z-index:300;background:#0b1322;border-left:1px solid #1a273f;flex-direction:column;width:min(500px,100vw);height:100vh;padding:18px;transition:right .3s;display:flex;position:fixed;top:0;right:-520px;box-shadow:-10px 0 35px #000000d9}.notes-drawer.open{right:0}.folder-select-bar{border:1px solid var(--card-border);background:#0f192b;border-radius:10px;align-items:center;gap:6px;margin-bottom:10px;padding:8px;display:flex}.folder-select-bar select{color:#f1f5f9;background:#142035;border:1px solid #223454;border-radius:8px;outline:none;flex:1;padding:6px 10px;font-size:13px}.note-tabs-container{border-bottom:1px solid #1a273f;gap:6px;margin-bottom:10px;padding-bottom:8px;display:flex;overflow-x:auto}.note-tabs-container::-webkit-scrollbar{height:4px}.note-tabs-container::-webkit-scrollbar-thumb{background:#223454;border-radius:4px}.note-tab-btn{color:var(--text-muted);cursor:pointer;white-space:nowrap;background:#142035;border:1px solid #223454;border-radius:8px;padding:5px 11px;font-size:12px;font-weight:600}.note-tab-btn:hover{color:#fff;background:#1a2942}.note-tab-btn.active{color:#60a5fa;background:#3b82f62e;border-color:#3b82f6}.note-editor-title{border:1.5px solid var(--input-border);color:#fff;background:#121d33;border-radius:8px;width:100%;margin-bottom:8px;padding:8px 12px;font-size:13.5px;font-weight:700}.note-editor-title:focus{border-color:var(--accent-blue);outline:none}.note-editor-content{border:1.5px solid var(--input-border);color:#f1f5f9;resize:none;background:#121d33;border-radius:10px;flex:1;height:auto;padding:12px;font-family:inherit;font-size:13px;line-height:1.5}.note-editor-content:focus{border-color:var(--accent-blue);outline:none}.hidden{display:none!important}.modal-overlay{z-index:500;background:#000000b3;justify-content:center;align-items:center;width:100vw;height:100vh;display:none;position:fixed;top:0;left:0}.modal-overlay.open{display:flex}.modal-box{background:#0f192b;border:1px solid #334155;border-radius:14px;width:350px;padding:20px;box-shadow:0 15px 35px #000c}.modal-box input{color:#fff;background:#121d33;border:1.5px solid #334155;border-radius:8px;width:100%;margin:12px 0;padding:10px;font-size:13.5px}.modal-box input:focus{border-color:#3b82f6;outline:none}.dedication-overlay{z-index:700;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#030712d6}.dedication-card{text-align:center;background:radial-gradient(at top,#be185d2e,#0000 62%),#0f192b;border:1px solid #f472b661;border-radius:22px;width:min(440px,100vw - 32px);padding:30px 26px 24px;animation:.42s cubic-bezier(.2,.8,.2,1) both dedication-enter;box-shadow:0 24px 70px #0000008c,0 0 36px #ec48991f}.dedication-heart{background:linear-gradient(145deg,#ec489938,#6366f129);border:1px solid #f472b659;border-radius:18px;place-items:center;width:58px;height:58px;margin:0 auto 15px;font-size:28px;display:grid}.dedication-kicker{color:#f9a8d4;letter-spacing:.2em;margin:0 0 9px;font-size:10px;font-weight:800}.dedication-title{color:#fff;margin:0;font-size:clamp(20px,5vw,25px);line-height:1.35}.dedication-note{color:#cbd5e1;margin:12px 0 22px;font-size:14px}.dedication-close{color:#fff;cursor:pointer;background:linear-gradient(135deg,#ec4899,#be185d);border:0;border-radius:10px;min-width:150px;padding:10px 20px;font-size:13px;font-weight:700;box-shadow:0 8px 20px #be185d40}.dedication-close:hover{filter:brightness(1.1)}.web-auth-overlay{z-index:3000;background:#02060cf7;place-items:center;padding:18px;display:grid;position:fixed;inset:0}.web-auth-card{border:1px solid var(--card-border);background:var(--card-bg);border-radius:18px;width:min(440px,100%);padding:26px;box-shadow:0 24px 60px #0000008c}.web-auth-card h1{color:#fff;margin:0 0 10px;font-size:21px}.web-auth-card p{color:var(--text-muted);font-size:13px;line-height:1.55}.web-auth-card label{color:#cbd5e1;margin:14px 0 6px;font-size:13px;display:block}.web-auth-card input{border:1px solid var(--input-border);background:var(--input-bg);color:#fff;border-radius:9px;width:100%;padding:11px 12px}.web-auth-card button{color:#fff;cursor:pointer;background:#2563eb;border:0;border-radius:9px;width:100%;margin-top:16px;padding:11px;font-weight:700}.web-auth-card button:disabled{opacity:.65;cursor:wait}.web-auth-status{color:#fca5a5;min-height:20px;font-size:12px}@keyframes dedication-enter{0%{opacity:0;transform:translateY(10px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}@media (prefers-reduced-motion:reduce){.dedication-card{animation:none}}@media (width<=900px){body{padding:10px}.app-layout{flex-direction:column;max-width:100%}.card{border-radius:16px;padding:16px}.slide-viewer-panel{height:min(72vh,760px);min-height:420px;position:relative;top:auto}}@media (width<=560px){body{padding:0}.card{border-left:0;border-right:0;border-radius:0;padding:13px}.top-status-bar{align-items:flex-start}.tab-nav{overflow-x:auto}.tab-btn{white-space:nowrap}.pdf-list-item{flex-direction:column;align-items:flex-start}.pdf-list-item>div{flex-wrap:wrap;width:100%}.slide-viewer-panel{border-radius:0;min-height:55vh}}