:root{color-scheme:dark;--paper:#0B1330;--bg:var(--paper);--panel:#121C40;--ink:#E6ECFA;--text:var(--ink);--muted:#9AA6C4;--rule:#26325C;--line:var(--rule);--blue:#3462D6;--chalk:#EAF0FF;--pink:#FF6FB0;--pink-ink:#FF8CC0;--on-pink:#0D1838;--sans:"IBM Plex Sans",system-ui,"Segoe UI",sans-serif;--mono:"IBM Plex Mono",ui-monospace,Consolas,monospace;--display:"Unbounded","Arial Black",system-ui,sans-serif;font:14px/1.5 var(--sans);background:var(--paper);color:var(--ink)}
*{box-sizing:border-box}body{margin:0}button,a,summary{-webkit-tap-highlight-color:transparent}button{font:inherit;color:inherit;cursor:pointer}button:disabled{opacity:.35;cursor:default}a{color:inherit;text-underline-offset:4px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--pink);outline-offset:4px}button{border:1px solid var(--line);background:transparent;border-radius:3px}button:hover:not(:disabled){border-color:var(--pink-ink)}[hidden]{display:none!important}
.topbar{max-width:1440px;margin:auto;padding:20px 40px;display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line)}.brand{display:block;line-height:0;flex-shrink:0}.brand img{width:194px;height:40px}.app-name{color:var(--muted);font-size:12px}.modes{margin-left:auto;display:flex;gap:4px;background:var(--panel);padding:4px;border:1px solid var(--line);border-radius:3px}.modes button{padding:8px 14px;border-color:transparent;color:var(--muted);white-space:nowrap}.modes button[aria-pressed=true]{background:var(--pink);color:var(--on-pink)}
main{max-width:1440px;margin:auto;padding:32px 40px 16px}.intro{display:flex;justify-content:space-between;align-items:center;gap:24px;margin-bottom:28px}h1{font-size:clamp(24px,3vw,34px);line-height:1.2;letter-spacing:-.05em;font-weight:600;margin:0 0 8px}.intro p{color:var(--muted);margin:0;font-size:13px}.stats{display:flex;gap:36px;text-align:right}.stats div{min-width:54px}.stats span{display:block;font-size:11px;color:var(--muted);margin-bottom:4px}.stats strong{font-size:24px;font-weight:500;line-height:1;font-variant-numeric:tabular-nums}.stats #score{color:var(--pink-ink)}
.workbench{display:grid;grid-template-columns:minmax(0,1fr)280px;gap:24px;align-items:start}.terminal{background:var(--panel);border:1px solid var(--line);border-radius:3px;overflow:hidden}.panel-bar{display:flex;justify-content:space-between;gap:12px;align-items:center;padding:12px 20px;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted)}.panel-bar h2{font-size:11px;font-weight:400;margin:0;color:var(--text)}#scene-label{font-size:10px}.stage{position:relative;height:318px;overflow:hidden;background:var(--bg)}#scene{position:absolute;inset:0}#scene>svg{width:100%;height:100%;display:block}.scene-caption{position:absolute;left:20px;bottom:16px;color:var(--muted);font-size:11px;pointer-events:none}.sculpture.solid.animate .piece{animation:build-in .28s ease-out both;animation-delay:calc(var(--piece)*65ms);transform-box:fill-box;transform-origin:center}#points-pop{position:absolute;right:24px;top:20px;font-size:28px;color:var(--pink-ink);font-weight:600}.stage.celebrate #points-pop{animation:score-in 1.2s ease-out both}
.console{padding:12px 20px;background:var(--bg);border-top:1px solid var(--line)}.history{height:34px;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden;color:var(--muted);font-size:10px}.history-row{display:flex;align-items:center;gap:6px;height:22px;flex-shrink:0}.history-row svg{width:18px;height:18px}.history-row .history-result{margin-left:8px}.history-row.ok .history-result{color:var(--pink-ink)}.history-row .history-prompt{color:var(--muted);margin-right:4px}.command{position:relative;display:flex;align-items:center;gap:12px;min-height:64px;padding:8px 0;outline:none;cursor:text}.command:focus-visible{outline:2px solid var(--pink-ink);outline-offset:2px}.prompt{font-size:30px;color:var(--pink-ink);font-weight:600;line-height:1}.queue{display:flex;align-items:center;gap:8px;flex-wrap:wrap;min-width:0}.token{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;color:var(--text);flex-shrink:0}.token svg{width:36px;height:36px}.token.mismatch{color:var(--pink-ink);border-bottom:2px dashed var(--pink)}.plane-cursor{width:32px;height:23px;flex-shrink:0;fill:none;stroke:var(--pink);stroke-width:3.2;animation:cursor 1.06s steps(1,end) infinite}.command-placeholder{color:var(--muted);font-size:12px;pointer-events:none}.input-meta{display:flex;justify-content:space-between;gap:16px;color:var(--muted);font-size:10px;padding-top:6px}.input-meta #queue-count{white-space:nowrap;font-variant-numeric:tabular-nums}
.keyboard{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:10px;padding:16px 20px 12px}.shape-key{position:relative;padding:10px 8px 8px;display:flex;align-items:center;justify-content:center;gap:8px;min-height:64px;color:var(--text);font-size:11px;background:var(--bg)}kbd{font:inherit;line-height:1;color:var(--muted)}.shape-key kbd{position:absolute;top:7px;left:8px;font-size:10px}.key-icon{display:block;line-height:0;color:var(--pink-ink)}.key-icon svg{width:32px;height:32px}.shape-key.pressed{border-color:var(--pink-ink);background:#FF6FB015}.actions{display:flex;gap:12px;padding:0 20px 18px;align-items:center}.quiet{padding:9px 12px;font-size:11px;min-height:40px}.quiet kbd{padding-left:8px}.primary{margin-left:auto;background:var(--pink);color:var(--on-pink);padding:10px 24px;font-size:12px;font-weight:600;min-width:170px;min-height:42px;border-color:var(--pink-ink)}.primary kbd{color:var(--on-pink);margin-left:16px}
.brief{background:var(--bg);border:1px solid var(--line);border-radius:3px;overflow:hidden;padding:20px;min-height:550px;display:flex;flex-direction:column}.brief-top{color:var(--muted);font-size:11px;display:flex;gap:12px;align-items:center;justify-content:space-between}.progress{display:flex;gap:4px}.progress span{height:5px;width:10px;background:var(--line)}.progress span.done{background:var(--pink)}.progress span.current{border:1px solid var(--pink)}.brief h2{font-size:20px;font-weight:500;line-height:1.3;letter-spacing:-.04em;margin:24px 0 8px}.brief>p{color:var(--muted);font-size:11px;margin:0}.blueprint{height:178px;margin:4px 0}.blueprint>svg{width:100%;height:100%;display:block}.target{display:flex;align-items:center;gap:5px;flex-wrap:wrap;min-height:48px;padding:8px 0 16px;border-bottom:1px solid var(--line)}.target-item{position:relative;display:flex;align-items:center;justify-content:center;width:32px;height:36px;color:var(--muted)}.target-item svg{height:30px;width:30px}.target-item.matched{color:var(--pink-ink)}.target-item.matched:after{content:"";position:absolute;bottom:-4px;width:12px;height:2px;background:var(--pink)}.feedback{font-size:12px;line-height:1.6;padding:16px 0 20px;min-height:96px}.feedback.success{color:var(--pink-ink)}.brief-bottom{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:16px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.brief-bottom strong{font-weight:400;color:var(--text)}.text-button{border:0;padding:6px 0;font-size:11px;text-decoration:underline;text-underline-offset:4px}.finish-free{padding:10px 12px;background:var(--pink);color:var(--on-pink);margin-bottom:16px;border-color:var(--pink-ink)}
.help{margin-top:20px;font-size:11px;color:var(--muted);max-width:800px}.help summary{cursor:pointer;display:inline-block;text-decoration:underline;text-underline-offset:4px}.help p{max-width:90ch;line-height:1.8}footer{max-width:1440px;margin:auto;padding:8px 40px 24px;display:flex;justify-content:space-between;gap:20px;color:var(--muted);font-size:10px}.noscript{padding:20px;text-align:center;color:var(--pink-ink)}
@keyframes cursor{0%,100%{opacity:1}50%{opacity:0}}@keyframes build-in{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes score-in{0%{opacity:0;transform:translateY(6px)}15%,70%{opacity:1;transform:translateY(0)}100%{opacity:0;transform:translateY(-8px)}}
@media(min-width:1500px){.stage{height:390px}.brief{min-height:620px}}
@media(max-width:1050px){.topbar{gap:16px;padding:16px 24px}.app-name{display:none}main{padding:24px}.workbench{grid-template-columns:minmax(0,1fr)240px;gap:16px}.brief{padding:16px}.shape-key{flex-direction:column;gap:4px;font-size:10px}.stats{gap:20px}.keyboard{gap:8px}.command-placeholder{font-size:10px}.desktop-hint{display:none}footer{padding-left:24px;padding-right:24px}}
@media(max-width:760px){.topbar{flex-wrap:wrap;gap:16px}.modes{margin-left:auto}.brand img{width:155px;height:32px}.modes button{padding:7px 10px;font-size:11px}.intro{align-items:flex-start;gap:16px}.intro p{font-size:11px;max-width:30ch}.stats{gap:14px}.stats div{min-width:35px}.stats span{font-size:9px}.stats strong{font-size:18px}.workbench{grid-template-columns:1fr}.brief{grid-row:1;display:grid;grid-template-columns:1fr auto;gap:0 16px;min-height:0;padding:16px}.brief-top{grid-column:1/-1}.brief h2{margin:12px 0 4px;font-size:18px}.brief>p{grid-column:1}.blueprint{display:none}.target{grid-column:2;grid-row:2/4;border:0;padding:0;align-self:center;gap:3px;max-width:160px}.target-item{width:24px;height:28px}.target-item svg{width:24px;height:24px}.feedback{grid-column:1/-1;min-height:0;padding:12px 0;font-size:11px}.brief-bottom{grid-column:1/-1;padding-top:10px}.finish-free{grid-column:1/-1}.stage{height:265px}.panel-bar{padding:10px 16px}.console{padding:8px 16px}.keyboard{padding:12px 16px;gap:8px}.actions{padding:0 16px 16px;gap:8px}.quiet{padding:8px;font-size:10px}.primary{min-width:135px;padding:10px 14px}.command{gap:8px}.token{width:30px;height:32px}.token svg{width:28px;height:28px}.queue{gap:4px}.command-placeholder{max-width:24ch}.plane-cursor{width:26px}.scene-caption{font-size:10px;left:16px}.help{margin-top:16px}footer{font-size:9px;flex-direction:column;gap:6px}}
@media(max-width:420px){.topbar{padding:16px}.brand img{width:145px;height:30px}.modes{width:100%;margin:0}.modes button{flex:1}main{padding:20px 16px 16px}.intro{flex-direction:column;gap:20px}.intro p{max-width:none}.stats{width:100%;justify-content:space-between;text-align:left;gap:24px}.stats span{display:inline;margin-right:8px}.stats strong{font-size:20px}.stats div{display:flex;align-items:baseline}.intro{margin-bottom:20px}.brief{gap:0 8px}.target{max-width:135px;gap:0}.target-item{width:22px}.brief h2{max-width:15ch}.command-placeholder{max-width:21ch;font-size:10px}.input-meta{font-size:9px}.primary{min-width:125px}.primary kbd{margin-left:8px}.quiet kbd{display:none}.shape-key{min-height:70px}.key-icon svg{width:30px;height:30px}footer{padding:8px 16px 20px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}.piece{opacity:1!important;transform:none!important}#points-pop{opacity:1}}

/* Playable lab: scene tools, spatial typing, assisted puzzles, and collection. */
.workbench{grid-template-columns:minmax(0,1fr)300px}
.topbar{padding-top:16px;padding-bottom:16px}
main{padding-top:24px}.intro{margin-bottom:24px}
.stage{height:300px}
.scene-state{position:absolute;left:20px;top:14px;z-index:1;color:var(--muted);pointer-events:none}
.scene-tools{display:flex;gap:8px;align-items:center}
.scene-tools button{font-size:10px;padding:5px 10px;min-height:30px;color:var(--muted)}
.scene-tools button:hover:not(:disabled){color:var(--text)}
@media(max-width:760px){#restore-build{min-height:44px}}
.token{position:relative}
.token>button{position:relative;display:flex;align-items:center;justify-content:center;padding:0;width:100%;height:100%;border-color:transparent;color:inherit}
.token>button:after{content:"×";position:absolute;right:-2px;top:-7px;font-size:12px;color:var(--pink-ink);opacity:0}
.token>button:hover:after,.token>button:focus-visible:after{opacity:1}
.cell-badge{position:absolute;bottom:-3px;right:-3px;background:var(--panel);border:1px solid var(--line);font:9px/1 var(--sans);padding:2px 3px;color:var(--muted);border-radius:2px}
.placement{display:flex;align-items:center;gap:16px;padding:12px 20px 0;font-size:10px;color:var(--muted)}
.placement>div{display:flex;gap:4px}
.placement button{padding:7px 14px;min-height:32px;font-size:10px}
.placement button[aria-pressed=true]{background:var(--pink);color:var(--on-pink);border-color:var(--pink-ink)}
.placement-help{margin-left:auto;font-size:10px;white-space:nowrap}
.brief{min-height:620px}
.progress{gap:3px}.progress span{width:6px}
.blueprint{height:200px}
.formula-bar{display:flex;flex-direction:column;align-items:flex-start;gap:10px;font-size:10px;color:var(--muted);padding:4px 0 12px}
.formula-bar button{font-size:11px;padding:8px 10px;color:var(--text);min-height:34px}
.formula-bar kbd{padding-left:10px;color:var(--pink-ink)}
.target{padding-top:0;gap:4px}.target-item{width:28px}.target-item svg{width:28px}
.feedback{min-height:76px;padding-top:12px;padding-bottom:16px}
.rating{color:var(--pink-ink);font-size:18px;padding-top:12px;letter-spacing:2px}
.collection{margin-top:24px;padding:24px;border:1px solid var(--line);border-radius:3px;background:var(--panel)}
.collection-heading{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.collection h2{font-size:18px;font-weight:500;margin:0;letter-spacing:-.025em}
#collection-total{color:var(--pink-ink);font-size:13px}
.collection-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.result-tile{min-width:0;padding:14px;background:var(--bg);border:1px solid var(--line);border-radius:3px;display:grid;grid-template-columns:24px minmax(0,1fr);gap:10px}
.result-number{color:var(--muted);font-size:11px}
.result-tile strong{font-weight:400;font-size:12px;line-height:1.5}
.result-stars{grid-column:2;color:var(--pink-ink);font-size:16px;letter-spacing:3px}
.quiet,.primary{min-height:44px}
@media(min-width:1500px){.stage{height:360px}.brief{min-height:680px}}
@media(max-width:1050px){
  .workbench{grid-template-columns:minmax(0,1fr)250px;gap:16px}
  .stats{gap:18px}.brief-top{flex-wrap:wrap;gap:8px}
  .placement{gap:10px;padding-left:16px;padding-right:16px}
  .placement button{padding:7px 10px}.placement-help{display:none}
  .collection-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
}
@media(max-width:760px){
  .workbench{grid-template-columns:minmax(0,1fr)}
  .brief{grid-template-columns:minmax(0,1fr)110px;min-height:0;gap:0 12px}
  .brief-top{grid-column:1/-1;grid-row:1;flex-wrap:nowrap}
  .brief h2{grid-column:1;grid-row:2;margin:12px 0 6px;font-size:18px;max-width:none}
  .brief>p{grid-column:1;grid-row:3;font-size:10px}
  .brief .blueprint{display:block;grid-column:2;grid-row:2/6;width:110px;height:140px;align-self:center;margin:0}
  .formula-bar{grid-column:1;grid-row:4;font-size:9px;gap:8px;padding-top:12px;padding-bottom:8px}
  .formula-bar button{font-size:10px;padding:7px 8px;min-height:34px;white-space:nowrap}
  .formula-bar kbd{padding-left:6px}
  .brief .target{grid-column:1;grid-row:5;max-width:none;gap:1px;min-height:0;padding:6px 0 8px;align-self:start}
  .target-item,.target-item svg{width:22px;height:25px}
  .rating{grid-column:1/-1;grid-row:6;padding-top:6px;font-size:16px}
  .feedback{grid-column:1/-1;grid-row:7;padding:12px 0;min-height:0}
  .finish-free{grid-column:1/-1;grid-row:8}
  .brief-bottom{grid-column:1/-1;grid-row:9}
  .stage{height:280px}.scene-state{left:16px;top:12px}
  .panel-bar{padding:10px 12px;gap:8px}.panel-bar h2{font-size:10px}
  .scene-tools{gap:4px}.scene-tools button{font-size:9px;padding:5px 6px;min-height:30px}
  .command{gap:8px}.queue{gap:8px 5px;padding:4px 0}
  .placement{padding-top:12px;gap:12px}.placement>span{font-size:9px}
  .placement button{min-height:36px;padding:7px 12px}
  .collection{padding:16px}.collection-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
  .result-tile{padding:10px;grid-template-columns:18px minmax(0,1fr);gap:6px}
  .result-tile strong{font-size:10px}.result-stars{font-size:14px}
}
@media(max-width:420px){
  .stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;text-align:left}
  .stats div{display:block;min-width:0}.stats span{display:block;margin:0 0 4px;font-size:10px}
  .stats strong{font-size:20px}.intro{gap:20px}
  .brief{grid-template-columns:minmax(0,1fr)96px;gap:0 8px}
  .brief .blueprint{width:96px;height:132px}.brief h2{font-size:17px}
  .progress{gap:2px}.progress span{width:5px}
  .placement{gap:8px;padding-left:12px;padding-right:12px}.placement button{padding:7px 10px}
  .cell-badge{font-size:8px;padding:2px}.scene-caption{max-width:calc(100% - 32px)}
}

/* Every visible ground tile is a playable cell. */
.keyboard{grid-template-columns:repeat(6,minmax(0,1fr))}
.shape-key{flex-direction:column;gap:4px;min-height:78px;padding-top:20px}
.shape-key>kbd{left:8px;right:8px;display:flex;justify-content:space-between}
.shape-key>kbd>span{color:var(--pink-ink)}
.modes{flex-wrap:wrap}.modes button{padding:8px 10px;font-size:12px}
.topbar{gap:20px}.app-name{font-size:10px}
.run-note{margin:14px 20px 0;color:var(--muted);font-size:10px}
.stock{font-size:10px;color:var(--pink-ink);font-variant-numeric:tabular-nums}
.shape-key:has(.stock:not([hidden])){min-height:98px}
.daily-result{margin-top:24px;padding:24px;border:1px solid var(--pink);border-radius:3px;background:var(--panel);display:grid;grid-template-columns:1fr 1fr;gap:20px}
.daily-result h2{font-size:20px;font-weight:500;margin:0 0 8px;letter-spacing:-.03em}
.daily-result p{font-size:11px;color:var(--muted);margin:0;max-width:36ch}
#daily-card{margin:0;padding:16px;background:var(--bg);border:1px solid var(--line);color:var(--pink-ink);font:12px/1.8 var(--sans);white-space:pre-wrap;overflow-wrap:anywhere;user-select:text}
.result-actions{grid-column:1/-1;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.result-actions button{font-size:11px;padding:10px 14px;min-height:44px}
#share-status{font-size:11px;color:var(--muted)}
.brief .blueprint{position:relative;background:none;border:0;padding:0;cursor:zoom-in}
.brief .blueprint:after{content:"Inspect ↗";position:absolute;bottom:0;right:0;font-size:9px;color:var(--muted)}
#blueprint-zoom{width:min(560px,calc(100vw - 32px));max-height:calc(100dvh - 32px);padding:20px;border:1px solid var(--line);border-radius:3px;background:var(--bg);color:var(--text)}
#blueprint-zoom::backdrop{background:#0B1330e0}
.modal-bar{display:flex;gap:16px;align-items:center;justify-content:space-between}
.modal-bar h2{font-size:18px;font-weight:500;letter-spacing:-.03em;margin:0}
.modal-bar button{padding:8px 12px;font-size:11px;min-height:44px;white-space:nowrap}
.modal-bar kbd{margin-left:8px}
#zoom-scene{height:min(62dvh,520px)}#zoom-scene svg{width:100%;height:100%;display:block}
#blueprint-zoom>p{font-size:11px;color:var(--muted);margin:0;line-height:1.6}
body:not([data-mode=challenge]) #scene [data-cell],body:not([data-mode=challenge]) #scene [data-piece-cell]{cursor:pointer}
body:not([data-mode=challenge]) #scene [data-cell]:hover{fill-opacity:.18}
body:not([data-mode=challenge]) .stage{height:350px}
.target-item>.cell-badge{font-size:8px;bottom:-1px;right:-1px;padding:1px 2px}
body:not([data-mode=challenge]) .target{gap:7px 5px}
.placement{display:grid;grid-template-columns:minmax(0,1fr) auto auto;gap:20px;padding:16px 20px 0;align-items:center}
.placement>.placement-copy{display:flex;flex-direction:column;gap:8px;min-width:0}
.placement-copy>span:first-child{font-size:12px;color:var(--text)}
.placement-copy strong{margin-left:8px;color:var(--pink-ink);font-size:18px;font-weight:500}
.placement-copy #field-count{font-size:10px}
.placement .placement-help{margin:0;display:block;white-space:normal;font-size:10px}
.placement>.cell-map{display:grid;grid-template-columns:repeat(3,32px);gap:4px}
.placement .cell-map button{position:relative;padding:0;min-height:32px;font-size:10px}
.cell-map button.occupied:after{content:"";position:absolute;width:3px;height:3px;background:var(--pink);bottom:3px;left:calc(50% - 1.5px)}
.cell-map button[aria-pressed=true]:after{background:var(--ink)}
.placement>.move-controls{display:grid;grid-template-columns:repeat(2,40px);gap:4px}
.placement .move-controls button{padding:0;min-height:40px;font-size:17px;display:flex;flex-direction:column;justify-content:center;align-items:center;line-height:1.1;gap:3px}
.move-controls kbd{font-size:10px;color:var(--muted)}
body[data-mode=sandbox] #scene [data-cell],body[data-mode=sandbox] #scene [data-piece-cell]{cursor:pointer}
body[data-mode=sandbox] #scene [data-cell]:hover{fill-opacity:.18}
body[data-mode=sandbox] .stage{height:350px}
.cell-badge{min-width:19px;text-align:center}
@media(max-width:1050px){.placement{gap:12px;padding:14px 16px 0}.placement-copy>span:first-child{font-size:10px}.placement-copy strong{margin-left:4px}.placement-copy .placement-help{font-size:9px}}
@media(max-width:760px){
  .modes{width:100%;margin:0}.modes button{flex:1 1 calc(33.333% - 8px);font-size:11px;min-height:40px}
  .run-note{margin:14px 16px 0;font-size:9px}
  .daily-result{padding:16px;grid-template-columns:minmax(0,1fr);gap:16px}
  #daily-card{font-size:11px;padding:12px}.daily-result h2{font-size:18px}
  body:not([data-mode=challenge]) .stage{height:320px}
  body[data-mode=spatial] .brief .blueprint,body[data-mode=kit] .brief .blueprint,body[data-mode=daily] .brief .blueprint{width:124px;height:156px}
  body[data-mode=spatial] .brief,body[data-mode=kit] .brief,body[data-mode=daily] .brief{grid-template-columns:minmax(0,1fr)124px}
  .keyboard{grid-template-columns:repeat(3,minmax(0,1fr))}
  body[data-mode=sandbox] .stage{height:320px}
  body[data-mode=sandbox] .terminal{grid-row:1}
  body[data-mode=sandbox] .brief{grid-row:auto}
  .placement{grid-template-columns:1fr auto;gap:12px;padding:14px 16px 0}
  .placement>.placement-copy{grid-column:1/-1;flex-direction:row;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:6px 12px}
  .placement-copy>span:first-child{font-size:11px}.placement-copy .placement-help{flex-basis:100%;font-size:10px}
  .placement>.cell-map{grid-template-columns:repeat(3,44px)}
  .placement .cell-map button{min-height:44px}
  .placement>.move-controls{grid-template-columns:repeat(2,44px)}
  .placement .move-controls button{min-height:44px}
}
@media(pointer:coarse) and (min-width:761px){
  .placement>.cell-map{grid-template-columns:repeat(3,44px)}
  .placement .cell-map button{min-height:44px}
  .placement>.move-controls{grid-template-columns:repeat(2,44px)}
  .placement .move-controls button{min-height:44px}
}

/* Geometry alphabet: three physical rows with a selectable touch layout. */
.keyboard-toolbar{display:flex;justify-content:space-between;gap:12px;align-items:center;margin:18px 20px 0;padding-top:16px;border-top:1px solid var(--line)}
.keyboard-toolbar h2{font-size:11px;font-weight:400;margin:0;color:var(--muted)}
.keyboard-toolbar>div{display:flex;gap:4px}
.keyboard-toolbar button{font-size:10px;padding:7px 10px;min-height:34px;color:var(--muted)}
.keyboard-toolbar button[aria-pressed=true]{color:var(--pink-ink);border-color:var(--pink-ink);background:#FF6FB00b}
.keyboard-shell{overflow-x:auto;overscroll-behavior-inline:contain;scrollbar-color:var(--line) var(--bg)}
.geometry-keyboard{display:block;min-width:640px;padding:16px 20px 12px}
.keyboard-row{display:grid;grid-template-columns:repeat(var(--keys),minmax(0,1fr));gap:6px;margin:0 var(--inset) 6px}
.geometry-keyboard .shape-key{min-width:0;min-height:86px;padding:21px 3px 7px;font-size:9px;gap:4px;border-bottom-width:3px;transition:background-color 70ms,color 70ms;overflow:hidden}
.geometry-keyboard .shape-key>kbd{top:6px;left:7px;right:7px;color:var(--text);font-size:13px}
.geometry-keyboard .shape-key>kbd>span{font-size:9px;color:var(--muted)}
.geometry-keyboard .key-icon svg{width:32px;height:32px}
.geometry-keyboard .key-label{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.geometry-keyboard .shape-key.last-used{border-color:var(--pink-ink)}
.geometry-keyboard .shape-key.pressed,.geometry-keyboard .shape-key.tapped{background:var(--pink);color:var(--on-pink);border-color:var(--pink-ink);border-bottom-color:var(--pink-ink)}
.geometry-keyboard .shape-key.pressed>kbd,.geometry-keyboard .shape-key.tapped>kbd,.geometry-keyboard .shape-key.pressed .key-icon,.geometry-keyboard .shape-key.tapped .key-icon,.geometry-keyboard .shape-key.pressed>kbd>span,.geometry-keyboard .shape-key.tapped>kbd>span{color:var(--on-pink)}
.geometry-keyboard .shape-key:disabled.pressed{background:#FF6FB030;opacity:.7;color:var(--muted)}
.geometry-keyboard.compact{min-width:0;display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:6px}
.geometry-keyboard.compact .keyboard-row{display:contents}
.geometry-keyboard.compact .shape-key{min-height:82px}
.geometry-keyboard .shape-key:has(.stock:not([hidden])){min-height:98px}
.key-readout{display:flex;align-items:center;gap:12px;margin:0 20px;padding:10px 12px;background:var(--bg);border:1px solid var(--line);border-radius:3px;min-height:58px}
#key-preview{width:32px;height:32px;flex-shrink:0;color:var(--pink-ink)}#key-preview svg{width:100%;height:100%}
.key-readout>div{display:flex;flex-direction:column;gap:3px;min-width:0}.key-readout strong{font-size:12px;font-weight:500;color:var(--pink-ink)}.key-readout div>span{font-size:10px;color:var(--muted)}
.keyboard-layout-note{margin:8px 20px 14px;font-size:9px;color:var(--muted)}
.actions .pressed,[data-move].pressed,#hint.pressed{background:var(--pink);border-color:var(--pink-ink);color:var(--on-pink)}
.token-letter{position:absolute;top:-5px;left:0;font:9px/1 var(--sans);color:var(--pink-ink);pointer-events:none}
.target-item>.token-letter{font-size:8px;top:-2px;left:0}
@media(max-width:760px){
  .keyboard-toolbar{margin:16px 12px 0}.keyboard-toolbar h2{font-size:10px}
  .keyboard-toolbar button{min-height:40px;padding:8px;font-size:9px}
  .geometry-keyboard{padding:12px}.geometry-keyboard.compact{gap:5px}
  .geometry-keyboard.compact .shape-key{min-height:80px;font-size:8px}
  .geometry-keyboard.compact .key-icon svg{width:29px;height:29px}
  .geometry-keyboard .shape-key>kbd{font-size:12px;left:5px;right:5px}
  .key-readout{margin:0 12px}.keyboard-layout-note{margin:8px 12px 14px;line-height:1.6}
}
@media(max-width:360px){.geometry-keyboard.compact{grid-template-columns:repeat(5,minmax(0,1fr))}}