:root{--bg: #0f1419;--surface: #1a2332;--surface2: #243044;--text: #e8edf4;--muted: #8b9cb3;--accent: #4f8cff;--accent-hover: #3a7aef;--success: #34d399;--danger: #f87171;--warning: #fbbf24;--radius: 12px;font-family:Segoe UI,system-ui,-apple-system,sans-serif;line-height:1.5;color:var(--text);background:var(--bg)}:root[data-theme=light]{--bg: #f4f6fa;--surface: #ffffff;--surface2: #e6ebf3;--text: #16202e;--muted: #5b6b80;--accent: #2563eb;--accent-hover: #1d4ed8;--success: #059669;--danger: #dc2626;--warning: #b45309}:root[data-theme=show]{--bg: #1a0b2e;--surface: #2b1250;--surface2: #3d1c6e;--text: #fdf6ff;--muted: #b39ddb;--accent: #ffb302;--accent-hover: #e69f00;--success: #4ade80;--danger: #ff5c8a;--warning: #ffd34d}:root[data-theme=light],:root[data-theme=show]{color:var(--text);background:var(--bg)}:root[data-theme=show] button,:root[data-theme=show] .btn{color:#2b1250}*{box-sizing:border-box}body{margin:0;min-height:100vh}a{color:var(--accent);text-decoration:none}button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border:none;border-radius:var(--radius);background:var(--accent);color:#fff;font-size:15px;font-weight:600;cursor:pointer;transition:background .15s}button:hover,.btn:hover{background:var(--accent-hover)}button.secondary,.btn.secondary{background:var(--surface2);color:var(--text)}button.danger{background:var(--danger)}button:disabled{opacity:.5;cursor:not-allowed}input,textarea,select{width:100%;padding:10px 14px;border:1px solid var(--surface2);border-radius:var(--radius);background:var(--surface);color:var(--text);font-size:15px}input:focus,textarea:focus,select:focus{outline:2px solid var(--accent);border-color:transparent}label{display:block;margin-bottom:6px;font-size:14px;color:var(--muted)}.container{max-width:960px;margin:0 auto;padding:24px}.card{background:var(--surface);border-radius:var(--radius);padding:24px;margin-bottom:16px}.card h2,.card h3{margin-top:0}.form-group{margin-bottom:16px}.error{color:var(--danger);font-size:14px;margin-top:8px}.nav{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;background:var(--surface);border-bottom:1px solid var(--surface2)}.nav-brand{font-size:20px;font-weight:700;color:var(--text)}.nav-links{display:flex;gap:16px;align-items:center}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:16px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}@media(max-width:640px){.grid-2,.grid-3{grid-template-columns:1fr}}.quiz-list{list-style:none;padding:0;margin:0}.quiz-list li{display:flex;align-items:center;justify-content:space-between;padding:16px;background:var(--surface2);border-radius:var(--radius);margin-bottom:8px}.actions{display:flex;gap:8px;flex-wrap:wrap}.display-screen{min-height:100vh;background:linear-gradient(135deg,var(--bg) 0%,var(--surface) 100%);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;text-align:center}.display-code{font-size:72px;font-weight:800;letter-spacing:8px;color:var(--accent);margin:16px 0}.display-pin{font-size:48px;font-weight:700;color:var(--warning);margin:8px 0 24px}.display-question{font-size:36px;max-width:900px;margin:24px 0}.scoreboard{width:100%;max-width:600px}.scoreboard-row{display:flex;justify-content:space-between;padding:12px 20px;background:var(--surface);border-radius:var(--radius);margin-bottom:8px;font-size:20px}.scoreboard-row.leader{border:2px solid var(--warning)}.join-screen{min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px}.join-card{width:100%;max-width:400px}.option-btn{width:100%;margin-bottom:12px;padding:16px;font-size:18px}.option-btn.selected{background:var(--success);color:#000;font-weight:600}.host-controls{display:flex;gap:8px;flex-wrap:wrap;margin-top:16px}.pending-list{list-style:none;padding:0}.pending-item{display:flex;align-items:center;justify-content:space-between;padding:12px;background:var(--surface2);border-radius:var(--radius);margin-bottom:8px}.lobby-list{list-style:none;padding:0}.lobby-list li{padding:8px 12px;background:var(--surface2);border-radius:8px;margin-bottom:4px}.badge{display:inline-block;padding:4px 10px;border-radius:20px;font-size:12px;font-weight:600;background:var(--surface2);color:var(--muted)}.badge.active{background:var(--success);color:#000}.editor-round{border:1px solid var(--surface2);border-radius:var(--radius);padding:16px;margin-bottom:16px}.question-item{background:var(--bg);border-radius:8px;padding:12px;margin-bottom:8px}.qr-code{background:#fff;border-radius:8px;padding:12px;margin:16px auto;display:flex;align-items:center;justify-content:center}.qr-code svg{width:100%;height:100%;display:block}.media-play{display:block;margin:12px auto 0;font-size:20px;padding:14px 28px}.hint{display:block;margin-top:4px;font-size:12px;color:var(--muted)}.countdown{position:relative;display:inline-flex;align-items:center;justify-content:center;flex-shrink:0}.countdown-value{position:absolute;font-weight:700;font-variant-numeric:tabular-nums}.question-media{margin:16px auto;max-width:100%}.question-media img,.question-media video{max-width:100%;max-height:42vh;border-radius:var(--radius);display:block;margin:0 auto}.question-media audio{width:min(480px,100%)}.media-thumb{max-height:120px;border-radius:8px;display:block;margin-top:8px}.reaction-bar{display:flex;gap:8px;flex-wrap:wrap;justify-content:center;margin-top:16px}.reaction-btn{font-size:26px;line-height:1;padding:10px 12px;background:var(--surface2);border-radius:var(--radius);min-width:52px}.reaction-btn:hover:not(:disabled){background:var(--surface)}.reaction-layer{position:fixed;top:0;right:0;bottom:0;left:0;pointer-events:none;overflow:hidden;z-index:50}.reaction-float{position:absolute;bottom:8%;font-size:44px;animation:reaction-rise 2.6s ease-out forwards}@keyframes reaction-rise{0%{opacity:0;transform:translateY(0) scale(.6)}15%{opacity:1;transform:translateY(-40px) scale(1.1)}to{opacity:0;transform:translateY(-58vh) scale(1)}}@media(prefers-reduced-motion:reduce){.reaction-float{animation-duration:1.2s;animation-timing-function:linear}}.score-adjust{display:flex;align-items:center;gap:4px}.score-adjust button{padding:2px 8px;font-size:13px;background:var(--surface2);min-width:32px}.scoreboard-row .score-adjust{margin-left:12px}