:root{color-scheme:dark;--bg:#10151e;--panel:#192230;--text:#f2f5fa;--muted:#afbdce;--accent:#7dd3fc;--line:#344052;--coral:#ffadbc}
*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 85% 0,#20475b40,transparent 55%),var(--bg);color:var(--text);font-family:system-ui,-apple-system,'Hiragino Kaku Gothic ProN',sans-serif;line-height:1.75}a{color:inherit}button,input,select,textarea{font:inherit}button{min-height:44px;padding:10px 17px;border:1px solid #4a6075;border-radius:10px;background:#243446;color:var(--text);cursor:pointer;touch-action:manipulation}button:hover:not(:disabled){background:#30485e;border-color:var(--accent)}button:disabled{opacity:.45;cursor:default}button.primary{background:var(--accent);border-color:var(--accent);color:#102a38;font-weight:750}button.quiet{background:transparent;color:var(--muted)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:4px}[hidden]{display:none!important}h1{font-size:clamp(26px,3vw,36px);line-height:1.5;letter-spacing:-.04em;margin:0 0 16px}h1:focus{outline:none}h2{font-size:19px;line-height:1.6;margin:0 0 12px}p{margin:0 0 16px}.muted,.fine{color:var(--muted)}.fine{font-size:12px}.eyebrow{font-size:11px;font-weight:750;color:var(--accent);letter-spacing:.18em;margin:0 0 16px}.welcome{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,1fr);gap:40px;align-items:start;padding-bottom:40px}.welcome>*{min-width:0}.actions{display:flex;flex-wrap:wrap;gap:12px;margin:24px 0 16px}.preview{border:1px solid #466073;border-radius:24px;background:linear-gradient(150deg,#203345,#141c29);padding:24px;position:relative;overflow:hidden}.preview-top{display:flex;justify-content:space-between;color:var(--accent);font-size:10px;letter-spacing:.14em}.preview svg{width:100%;display:block;margin:20px 0}.preview-caption{margin:0;color:#c0d5e3;font-size:13px;text-align:center}.steps{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);padding:0;margin:0 0 24px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.steps li{padding:22px 16px 22px 0}.steps b,.steps span{display:block;font-size:13px}.steps b{color:var(--accent);margin-bottom:6px}.steps span{color:var(--muted)}.static-entry{margin:18px 0 24px;font-size:13px}.static-entry summary{color:var(--muted);cursor:pointer}.static-entry p{margin:12px 0}.task-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:22px 26px;margin-bottom:24px}.task-card p:last-child{margin:0}.target-dot{display:inline-block;width:14px;height:14px;border-radius:50%;background:var(--coral);vertical-align:-1px;margin-right:5px}.scene-wrap{position:relative;max-width:800px;margin:0 auto;border:1px solid #465a70;border-radius:18px;overflow:hidden;background:#131e2c}.scene-wrap canvas{display:block;width:100%;aspect-ratio:8/5;height:auto}.stage-header{max-width:800px;display:flex;justify-content:space-between;align-items:center;gap:12px;margin:0 auto 14px}.stage-header p{font-size:13px;margin:0;color:var(--muted)}.stage-header strong{color:var(--coral)}.time{font-variant-numeric:tabular-nums;font-size:13px;white-space:nowrap;color:var(--accent)}.countdown{position:absolute;inset:0;display:grid;place-content:center;text-align:center;background:#131e2cf2;pointer-events:none}.countdown strong{font-size:72px;line-height:1.2;color:var(--accent)}.countdown p{color:var(--muted);font-size:14px;margin:12px 0 0}progress{display:block;accent-color:var(--accent);width:min(100%,800px);height:4px;margin:14px auto 0}.stage-bottom{max-width:800px;margin:16px auto 0;display:flex;align-items:center;justify-content:space-between;gap:14px}.stage-bottom p{margin:0;font-size:12px;color:var(--muted)}.answer-layout{display:grid;grid-template-columns:1fr 1fr;gap:32px}.answer-panel{padding:28px;border-radius:18px;background:var(--panel);border:1px solid var(--line)}label.field{display:block;font-weight:650;margin-bottom:12px}input[type=number]{width:100%;max-width:180px;font-size:36px;font-weight:750;padding:10px 18px;border-radius:12px;border:1px solid #60748c;background:#101925;color:var(--coral)}fieldset{border:0;padding:0;margin:28px 0 20px;min-width:0}legend{font-weight:650;margin-bottom:10px}.radio-row{display:flex;gap:10px;flex-wrap:wrap}.radio-row label{display:flex;align-items:center;gap:8px;min-height:44px;padding:8px 12px;border:1px solid #506077;border-radius:10px;cursor:pointer}.radio-row label:has(input:checked){background:#274156;border-color:var(--accent)}input[type=radio]{accent-color:var(--accent);width:17px;height:17px}textarea{display:block;width:100%;min-height:90px;resize:vertical;padding:12px;border:1px solid #506077;border-radius:10px;background:#101925;color:var(--text)}.observation-note{display:flex;flex-direction:column;justify-content:center;padding:16px}.observation-note .large-number{color:#7dd3fc55;font-size:100px;line-height:1.1;letter-spacing:-.08em;font-weight:800}.observation-note h2{margin-top:20px}.result-lead{font-size:18px;color:#d1e6f2;max-width:700px}.metrics{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:24px 0}.metric{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:20px}.metric span{display:block;font-size:12px;color:var(--muted)}.metric strong{display:block;font-size:32px;font-weight:750;color:var(--accent);margin:6px 0}.metric small{font-size:13px}.finding{border-left:3px solid var(--coral);background:#ffadbc0b;padding:22px 26px;margin:24px 0}.finding h2{color:var(--coral)}.finding p:last-child{margin:0}.playback{border:1px solid var(--line);border-radius:18px;padding:24px;margin:28px 0;background:#141d29}.playback-heading{display:flex;justify-content:space-between;align-items:center;gap:15px;margin-bottom:16px}.playback-heading h2,.playback-heading p{margin:0}.replay-controls{max-width:800px;margin:16px auto 0}.seek-label{display:flex;justify-content:space-between;gap:10px;font-size:12px;color:var(--muted)}input[type=range]{width:100%;accent-color:var(--accent);min-height:36px;cursor:pointer}.control-row{display:flex;align-items:center;flex-wrap:wrap;gap:10px;margin:10px 0}.control-row select{background:var(--panel);color:var(--text);border:1px solid #506077;border-radius:8px;padding:9px;min-height:44px}.control-row label{font-size:13px}.control-row .toggle-label{display:flex;align-items:center;gap:7px}.toggle-label input{accent-color:var(--coral);width:18px;height:18px}.replay-status{min-height:26px;font-size:13px;color:var(--coral);margin:12px 0 0}.explanation{max-width:760px;margin:32px 0}.explanation p{color:var(--muted)}.explanation a{color:var(--accent)}.share-box{border:1px solid var(--line);padding:22px;border-radius:14px;margin-top:28px}.share-box h2{font-size:17px}.share-box p{font-size:13px;color:var(--muted)}.share-box input{background:#101925;border:1px solid #506077;color:var(--text);padding:10px;width:100%;min-width:0;border-radius:8px;font-size:12px}.share-box .actions{margin-bottom:0}#status{font-size:13px;color:var(--accent);margin-top:20px;min-height:24px}#interrupted{max-width:760px}noscript{display:block;padding:20px}
@media(max-width:900px){.welcome{grid-template-columns:1fr;gap:28px}.preview{max-width:420px;width:90%;margin:12px auto}.answer-layout{grid-template-columns:1fr}.observation-note{display:none}}
@media(max-width:600px){.steps{gap:12px}.steps li{padding:18px 0}.steps span{font-size:12px}.task-card,.answer-panel{padding:20px}.metrics{gap:8px}.metric{padding:12px}.metric strong{font-size:26px}.metric span{font-size:11px}.metric:last-child strong{font-size:20px;min-height:39px;display:flex;align-items:center}.finding{padding:18px}.playback{padding:14px}.playback-heading{align-items:flex-start;flex-direction:column;gap:4px}.stage-bottom{align-items:flex-start}.stage-bottom p{max-width:150px}.stage-header p{font-size:12px}.control-row{gap:8px}.control-row button{font-size:12px;padding:9px 12px}.control-row .toggle-label{width:100%}.share-box{padding:18px}.result-lead{font-size:16px}.scene-wrap{border-radius:12px}.time{font-size:12px}}

@media(max-width:600px){.metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.metric:last-child{grid-column:1/-1;display:flex;align-items:center;justify-content:space-between;gap:12px}.metric:last-child strong{min-height:0;margin:0;white-space:nowrap}.metric:last-child span{max-width:65%;font-size:12px}}
.actions>a.button-link{display:inline-flex;align-items:center;min-height:44px;padding:10px 17px;border-radius:10px;background:var(--accent);color:#102a38;font-weight:750;text-decoration:none}