:root{--bg: #f4f6f8;--surface: #ffffff;--surface-2: #eef2f5;--text: #17222c;--muted: #5b6b78;--border: #d5dde3;--primary: #0f3d5e;--primary-2: #1b5a86;--accent: #f5a623;--ok: #1f8a4c;--ok-bg: #e3f4ea;--err: #c0392b;--err-bg: #fbe6e3;--warn-bg: #fff4dc;--a0: #e21b3c;--a1: #1368ce;--a2: #d89e00;--a3: #26890c;--radius: 12px;--shadow: 0 1px 2px rgba(15, 30, 45, .08), 0 4px 16px rgba(15, 30, 45, .06);color-scheme:light}@media(prefers-color-scheme:dark){:root{--bg: #0f151b;--surface: #18212a;--surface-2: #212c37;--text: #e7edf2;--muted: #9aabb8;--border: #2e3b47;--primary: #5aa9de;--primary-2: #7dbde8;--ok-bg: #163524;--err-bg: #3d1d1a;--warn-bg: #3a2f14;--shadow: none;color-scheme:dark}}*{box-sizing:border-box}html,body{margin:0;background:var(--bg);color:var(--text);font:16px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif;-webkit-text-size-adjust:100%}a{color:var(--primary-2)}h1,h2,h3{line-height:1.2;margin:0 0 .6em}h1{font-size:1.6rem}h2{font-size:1.25rem}h3{font-size:1.05rem}p{margin:0 0 .8em}.topbar{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:12px;padding:10px 16px;background:#0f3d5e;color:#fff}.topbar a{color:#fff;text-decoration:none}.brand{font-weight:700;letter-spacing:.02em;display:flex;align-items:center;gap:8px}.brand img{width:26px;height:26px}.topbar nav{display:flex;gap:4px;margin-left:auto;flex-wrap:wrap;justify-content:flex-end}.topbar nav a{padding:6px 10px;border-radius:8px;font-size:.95rem}.topbar nav a.active,.topbar nav a:hover{background:#ffffff24}.live-dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:#ff4d4f;margin-right:6px;animation:pulse 1.2s infinite}@keyframes pulse{50%{opacity:.3}}.page{max-width:1100px;margin:0 auto;padding:20px 16px 60px}.page.narrow{max-width:460px}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}.card+.card{margin-top:16px}.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(260px,1fr))}.stack>*+*{margin-top:12px}.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.spacer{flex:1}.muted{color:var(--muted)}.small{font-size:.875rem}.center{text-align:center}label{display:block;font-weight:600;font-size:.9rem;margin-bottom:4px}input,select,textarea{width:100%;font:inherit;padding:10px 12px;border:1px solid var(--border);border-radius:10px;background:var(--surface);color:var(--text)}input:focus,select:focus,textarea:focus{outline:2px solid var(--primary-2);outline-offset:0;border-color:transparent}input[type=checkbox]{width:20px;height:20px;padding:0;accent-color:var(--primary)}button,.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font:inherit;font-weight:600;padding:10px 16px;border-radius:10px;border:1px solid var(--border);background:var(--surface);color:var(--text);cursor:pointer;text-decoration:none;min-height:44px}button.primary,.btn.primary{background:var(--primary);border-color:var(--primary);color:#fff}button.accent{background:var(--accent);border-color:var(--accent);color:#1d1300}button.danger{color:var(--err)}button.small,.btn.small{min-height:34px;padding:6px 10px;font-size:.875rem}button:disabled{opacity:.5;cursor:default}.alert{padding:10px 14px;border-radius:10px;background:var(--err-bg);color:var(--err)}.alert.ok{background:var(--ok-bg);color:var(--ok)}.alert.warn{background:var(--warn-bg);color:inherit}.badge{display:inline-block;font-size:.75rem;font-weight:700;padding:2px 8px;border-radius:999px;background:var(--surface-2);color:var(--muted)}.badge.ok{background:var(--ok-bg);color:var(--ok)}.badge.err{background:var(--err-bg);color:var(--err)}.lecture-card{display:block;color:inherit;text-decoration:none}.lecture-card .num{font-size:.8rem;font-weight:700;color:var(--muted)}.lecture-card:hover{border-color:var(--primary-2)}.tabs{display:flex;gap:6px;border-bottom:1px solid var(--border);margin-bottom:16px;overflow-x:auto}.tabs button{border:none;border-bottom:3px solid transparent;border-radius:0;background:none;min-height:42px;white-space:nowrap}.tabs button.active{border-bottom-color:var(--accent)}.slide-viewer{background:#000;border-radius:var(--radius);overflow:hidden;position:relative;-webkit-user-select:none;user-select:none}.slide-viewer img{display:block;width:100%;aspect-ratio:16 / 9;object-fit:contain;background:#000}.slide-viewer:fullscreen{display:flex;align-items:center}.slide-viewer:fullscreen img{height:100vh;aspect-ratio:auto}.slide-nav{position:absolute;top:0;bottom:0;width:30%;background:none;border:none;min-height:0}.slide-nav.prev{left:0}.slide-nav.next{right:0}.thumbs{display:flex;gap:6px;overflow-x:auto;padding:8px 0}.thumbs img{height:54px;border-radius:4px;border:2px solid transparent;cursor:pointer}.thumbs img.active{border-color:var(--accent)}.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:10px}table{border-collapse:collapse;width:100%;font-size:.92rem}th,td{padding:8px 10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:middle}th{background:var(--surface-2);font-weight:600;white-space:nowrap}td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}tr:last-child td{border-bottom:none}.cell-input{width:84px;padding:6px 8px;text-align:right}.cell-cost{font-size:.75rem;color:var(--muted);display:block;text-align:right}td.bad{background:var(--err-bg)}td.good{background:var(--ok-bg)}.kpis{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:10px}.kpi{background:var(--surface-2);border-radius:10px;padding:10px 12px}.kpi .v{font-size:1.3rem;font-weight:700;font-variant-numeric:tabular-nums}.kpi .l{font-size:.8rem;color:var(--muted)}.live{min-height:calc(100vh - 56px);display:flex;flex-direction:column}.live-head{display:flex;align-items:center;gap:10px;padding:10px 16px;font-weight:600}.live-body{flex:1;display:flex;flex-direction:column;padding:0 16px 16px;gap:14px}.q-text{font-size:1.3rem;font-weight:700;text-align:center;padding:14px;background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow)}.answers{display:grid;grid-template-columns:1fr 1fr;gap:10px;flex:1}@media(max-width:520px){.answers{grid-template-columns:1fr}}.answer{color:#fff;border:none;border-radius:var(--radius);font-size:1.1rem;font-weight:700;min-height:72px;padding:14px;display:flex;align-items:center;justify-content:flex-start;gap:12px;text-align:left}.answer .shape{font-size:1.4rem;width:28px;flex:none;text-align:center}.answer.a0{background:var(--a0)}.answer.a1{background:var(--a1)}.answer.a2{background:var(--a2)}.answer.a3{background:var(--a3)}.answer.selected{outline:4px solid var(--text);outline-offset:2px}.answer.dim{opacity:.35}.answer.right{outline:4px solid var(--ok);outline-offset:2px}.timer{min-width:52px;height:52px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;background:#6c2bd9;color:#fff;font-size:1.3rem;font-weight:800}.big-feedback{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;border-radius:var(--radius);padding:24px;color:#fff;font-size:1.2rem}.big-feedback.right{background:var(--a3)}.big-feedback.wrong{background:var(--a0)}.big-feedback.neutral{background:var(--primary)}.big-feedback .huge{font-size:2.4rem;font-weight:800}.leader{display:flex;justify-content:space-between;padding:12px 16px;border-radius:10px;background:var(--surface);box-shadow:var(--shadow);font-weight:600;font-size:1.1rem}.leader+.leader{margin-top:8px}.podium{display:flex;align-items:flex-end;justify-content:center;gap:12px;margin-top:20px}.podium .step{width:min(30vw,200px);text-align:center;color:#fff;border-radius:10px 10px 0 0;padding:12px 6px;font-weight:700}.podium .p1{background:#d4a017;height:220px}.podium .p2{background:#8e9aa6;height:170px}.podium .p3{background:#b0703c;height:130px}.wordcloud{display:flex;flex-wrap:wrap;gap:8px 16px;justify-content:center;align-items:center;padding:20px;background:var(--surface);border-radius:var(--radius);min-height:200px}.wordcloud span{font-weight:700;line-height:1.1}.bars{display:flex;gap:12px;align-items:flex-end;height:180px;justify-content:center}.bars .bar{width:70px;border-radius:8px 8px 0 0;color:#fff;font-weight:800;text-align:center;padding-top:4px;min-height:30px}.host{min-height:100vh;display:flex;flex-direction:column;background:var(--bg)}.host .q-text{font-size:clamp(1.4rem,3vw,2.4rem);padding:24px}.host .answer{font-size:clamp(1.1rem,2vw,1.7rem);min-height:90px}.host-bar{display:flex;gap:10px;align-items:center;padding:10px 16px;background:var(--surface);border-bottom:1px solid var(--border);flex-wrap:wrap}.qr-big{background:#fff;padding:16px;border-radius:var(--radius);display:inline-block}.qr-big canvas,.qr-big img{display:block;width:min(60vh,80vw);height:auto}.players-cloud{display:flex;flex-wrap:wrap;gap:8px;justify-content:center}.players-cloud span{background:var(--surface);border-radius:999px;padding:6px 14px;font-weight:600;box-shadow:var(--shadow)}.md p:last-child{margin-bottom:0}.md table{width:auto}