/* Quiet gallery chrome; the room and its lesson share the first viewport. */
header,main,footer{width:min(1480px,calc(100% - 64px))}
header{padding:12px 0;gap:20px}.brand{gap:18px;flex-wrap:wrap}.brand span{font-size:11px;font-weight:500;color:var(--muted);letter-spacing:.08em}
.settings{gap:18px}.languages{font-size:12px;gap:12px}.theme-label{font-size:12px}.theme-label select{font-size:12px;max-width:130px;padding:8px}
.intro{max-width:none;padding:25px 0 22px;display:flex;justify-content:space-between;align-items:center;gap:30px}h1{font-size:clamp(25px,2.8vw,40px);margin:0;line-height:1.4}.intro>p:last-child{font-size:14px;max-width:38ch;margin:0}
.layout{grid-template-columns:minmax(0,1fr) 330px;gap:24px;align-items:start}.room{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:var(--surface)}
.scene{height:auto;aspect-ratio:1.28;background:#d8cbbb;isolation:isolate}.scene #stage{inset:0}.scene:has(canvas){cursor:grab}.scene:active:has(canvas){cursor:grabbing}#poster{display:block;pointer-events:none}#poster img{display:block;width:100%;height:100%;object-fit:contain}
.room-tools{padding:12px 16px 4px;gap:8px}.room-tools button{font-size:13px;flex:1 1 auto;padding:10px 12px}#status{margin:8px 18px 10px;min-height:22px;font-size:12px;color:var(--muted)}
.view-settings{border-top:1px solid var(--line);margin:0 16px}.view-settings summary,.reading-note summary{cursor:pointer;min-height:44px;padding:12px 0;font-size:13px;color:var(--ink)}summary:focus-visible{outline:3px solid var(--accent);outline-offset:2px}
.orbit-controls{border:0;padding:0 0 14px;margin:0;min-width:0}.orbit-controls legend{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.orbit-controls p{font-size:12px;color:var(--muted);margin:0 0 12px}.angle-sliders{display:grid;grid-template-columns:1fr 1fr;gap:24px}.angle-sliders label{font-size:13px}.angle-sliders output{float:right;font-variant-numeric:tabular-nums}.angle-sliders input{display:block;width:100%;height:44px;margin:0;accent-color:var(--accent);cursor:pointer}.angle-sliders input:focus-visible{outline:3px solid var(--accent)}.angle-buttons{display:flex;flex-wrap:wrap;gap:8px}.angle-buttons button,.scene-options button,.scene-options select{font-size:12px}.angle-buttons [aria-pressed=true]{background:var(--ink);color:var(--paper)}.scene-options{padding:0 0 14px;display:flex;gap:10px;align-items:center;flex-wrap:wrap}.scene-options label{display:flex;align-items:center;gap:8px;font-size:12px}.notice{font-size:11px;padding:10px 18px 14px;border-top:1px solid var(--line);line-height:1.65;margin:0}
.lesson{border:0;border-radius:0;background:transparent;padding:10px 0}.lesson-kicker{font-size:11px;color:var(--muted);letter-spacing:.07em;margin:0 0 12px}.lesson h2{font-size:23px;font-weight:600;margin:0 0 22px}.lesson-card{display:grid;grid-template-columns:24px 1fr;gap:10px;border-top:1px solid var(--line);padding:18px 0}.number{font-size:11px;color:var(--muted);padding-top:6px;font-variant-numeric:tabular-nums}.phrase{font-size:25px;line-height:1.6;margin:0;font-weight:550;white-space:normal;letter-spacing:-.04em}.closing{font-size:24px}.romaji{font-size:12px;margin:4px 0 8px}.gloss{font-size:14px;margin:8px 0}.hint{font-size:13px;margin:8px 0 0;line-height:1.8}.board-example{font-size:19px;border-left:2px solid var(--accent);padding-left:12px;margin:14px 0 8px}.audio-tools{margin-top:12px}.audio-tools>div{display:flex;gap:8px}.audio-tools button{font-size:12px;padding:8px 10px}.disclosure{font-size:11px;line-height:1.7;margin:0;padding-top:14px}.reading-note p{font-size:12px;color:var(--muted);margin-top:0}.privacy{font-size:12px}footer{margin-top:18px;padding:18px 0 32px;font-size:13px}
@media(min-width:851px){.scene{height:clamp(460px,62vh,700px);aspect-ratio:auto}}
@media(max-width:850px){header,main,footer{width:calc(100% - 28px)}header{padding:10px 0;gap:6px}.brand{font-size:17px;gap:12px}.settings{width:100%;justify-content:space-between;gap:6px}.languages{gap:12px}.theme-label>span{display:none}.theme-label select{max-width:105px}.intro{display:block;padding:20px 0 16px}h1{font-size:27px;line-height:1.45}.intro>p:last-child{font-size:13px;max-width:none;margin:8px 0 0}.layout{grid-template-columns:1fr;gap:22px}.scene{aspect-ratio:1}.room{border-radius:12px}.room-tools{padding:10px 10px 2px;display:grid;grid-template-columns:1fr 1fr;gap:6px}.room-tools button{font-size:12px;padding:8px}.view-settings{margin:0 12px}.angle-sliders{gap:14px}.angle-buttons button{flex:1 1 auto}#status{margin:8px 12px 10px}.notice{padding:10px 12px 12px}.lesson{padding:0 8px}.lesson h2{font-size:23px;margin-bottom:18px}.phrase{font-size:27px}.closing br{display:none}.closing{font-size:24px}.lesson-card{grid-template-columns:24px 1fr;padding:20px 0}.lesson-card .hint{font-size:14px}.privacy{line-height:1.7}}
.angle-sliders input{color:var(--ink);background:transparent}