:root{color-scheme:dark;--mint:#72ffe0;--gold:#ffdf86;--muted:#b9c5dc;--line:#8292bc44}*{box-sizing:border-box}body{margin:0;background:radial-gradient(ellipse at 60% 0,#292150,#090f24 60%);color:#f2f5ff;font:16px system-ui,-apple-system,sans-serif}button,input,select{font:inherit}button,a{touch-action:manipulation}button{min-width:44px;min-height:44px;padding:10px 14px;background:#242f4c;border:1px solid #899dba55;border-radius:14px;color:inherit;cursor:pointer;font-weight:750}button:hover{border-color:var(--mint)}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--gold);outline-offset:3px}button:disabled{opacity:.6;cursor:default}.primary{background:var(--mint);color:#102839;border-color:var(--mint)}a{color:var(--mint)}p{line-height:1.55}.topbar{display:flex;align-items:center;gap:20px;max-width:1200px;margin:auto;padding:16px 20px;flex-wrap:wrap}.brand{display:flex;align-items:center;gap:12px;color:inherit;text-decoration:none;font-weight:900;line-height:1.1}.brand small{display:block;font-size:10px;margin-top:7px;color:var(--gold);letter-spacing:1px}.topbar nav{display:flex;gap:5px;flex:1;justify-content:flex-end}.topbar nav button{padding:8px;font-size:13px}main{max-width:1120px;margin:0 auto;padding:16px}.panel{background:#17213bd9;border:1px solid var(--line);border-radius:26px;padding:28px}.hero{display:grid;grid-template-columns:1fr 200px;gap:24px;align-items:center}.hero h1{font-size:clamp(30px,5vw,58px);line-height:1.05;margin:12px 0}.eyebrow{font:800 12px ui-monospace,monospace;letter-spacing:1px;color:var(--gold)}.hero img{width:100%;filter:drop-shadow(0 16px 25px #0008)}.hero-actions,.practice-select{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.small{font-size:13px;color:var(--muted)}.panel h2{margin-top:28px}.practice-select select{flex:1;min-width:200px}.status:empty{display:none}.status{color:var(--gold)}input,select{min-height:48px;min-width:0;border-radius:10px;background:#0f1930;border:1px solid #8b9abd88;color:inherit;padding:10px;width:100%}.arena{background:#111a32;border:1px solid var(--line);border-radius:22px;padding:14px}.hud{display:flex;gap:12px;align-items:center;flex-wrap:wrap;margin-bottom:12px}.hud-title{flex:1}.hud-title small{display:block;color:var(--gold);font:750 10px ui-monospace,monospace}.hud-title strong{font-size:20px}.hud-metrics{display:flex;gap:16px;color:var(--mint);font:800 13px ui-monospace,monospace}.hud-tools{display:flex;gap:5px}.hud-tools button{padding:6px}.board-wrap{position:relative;border-radius:16px;overflow:hidden;background:#090f25}#board{display:block;width:100%;aspect-ratio:16/9;outline:none}.controls{display:flex;justify-content:space-between;gap:8px;margin-top:12px}.steering{display:flex;gap:8px}.steering button{font-size:24px;width:64px}.action-controls{display:flex;gap:8px}.feedback{color:var(--gold);margin:12px 0 0}.pause-overlay{position:absolute;inset:0;background:#101831cc;display:none;align-items:center;justify-content:center;flex-direction:column;z-index:2}.pause-overlay.visible{display:flex}.footer{text-align:center;padding:30px 16px;color:var(--muted);font-size:12px}.sr-only{position:absolute;clip-path:inset(50%);width:1px;height:1px;overflow:hidden}.music-button{font-size:20px}.music-button small{display:block;font-size:9px}
dialog{background:#17213b;color:inherit;border:1px solid #9faedb;border-radius:20px;padding:16px;width:min(780px,96vw);max-height:94dvh;box-shadow:0 25px 100px #000b}dialog::backdrop{background:#080d21db;backdrop-filter:blur(6px)}.dialog-head{display:flex;align-items:center;gap:12px;justify-content:space-between;flex:none}.dialog-head h2{font-size:20px;margin:3px 0}.dialog-head small{color:var(--mint);font-size:11px}.dialog-head>button{font-size:24px;padding:0}.dialog-footer{display:flex;justify-content:space-between;gap:8px;flex:none}.scroll-copy{max-height:70dvh;overflow:auto;padding-right:6px;font-size:14px}#workshop[open]{display:flex;flex-direction:column;gap:10px;max-height:94dvh}#work-body{overflow:auto;min-height:0;flex:1;padding:3px}.step-label{font:750 11px ui-monospace,monospace;color:var(--gold);margin:4px 0 8px}#work-body h3{margin:4px 0 8px;font-size:19px}.task{margin:6px 0 12px;font-size:15px}.equation{font:850 clamp(18px,4vw,28px) ui-monospace,monospace;color:var(--gold);text-align:center;background:#0b142d;border-radius:14px;padding:14px;line-height:1.5}.tokens{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin:14px 0}.token{font:850 24px ui-monospace,monospace;background:#203f52;min-width:70px;min-height:64px;position:relative}.selected{background:#7affdd33!important;border:2px solid var(--mint)!important}.token small{display:block;font:750 11px system-ui;margin-top:3px}.socket{border:2px dashed var(--gold);background:#584a2422}.mini-actions{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}.mini-actions button{flex:1;max-width:220px}.hint{color:var(--muted);font-size:13px}.estimate-row{display:grid;grid-template-columns:48px 1fr 48px;gap:8px;align-items:center;margin:12px 0}.estimate-row input{min-height:48px;padding:0;accent-color:var(--mint);width:100%}.estimate-output{display:block;text-align:center;color:var(--mint);font:850 26px ui-monospace,monospace}.range-labels{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin:0 55px}.fraction-bar{display:flex;width:160px;height:20px;border:2px solid var(--mint);border-radius:5px;overflow:hidden;margin:10px auto}.fraction-bar i{flex:1;border-right:1px solid #17213b;background:var(--mint)}.fraction-bar i:last-child{border-right:0}#work-notice{font-size:13px;line-height:1.4;color:var(--gold);margin:0;max-height:60px;overflow:auto;flex:none}#work-notice:empty{display:none}.passport{display:flex;gap:6px;justify-content:center;flex-wrap:wrap}.passport button{font-size:22px;min-width:58px}.passport button.done{background:#416854}.score-big{font:900 42px ui-monospace,monospace;color:var(--gold)}.summary-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.summary-grid article{padding:12px;border:1px solid var(--line);border-radius:13px}.summary-grid p{font-size:12px}.record-form,.filters{display:grid;grid-template-columns:1fr 1.7fr .7fr;gap:12px}.record-form label,.filters label{display:block;margin-bottom:5px;font-size:13px}.record-form>p,.record-form>button{grid-column:1/-1}.table-scroll{overflow:auto;margin-top:20px}table{border-collapse:collapse;width:100%;min-width:560px}td,th{text-align:left;padding:14px 8px;border-bottom:1px solid var(--line)}.empty{padding:20px;color:var(--muted)}
/* The shared stage rotates into landscape when native fullscreen is unavailable. */
.arcade-expanded{overflow:hidden;overscroll-behavior:none}.arena.immersive{position:fixed;inset:0;z-index:1000;width:100vw;height:100dvh;padding:0;margin:0;border:0;border-radius:0;background:#090f25}.landscape-stage{position:absolute;inset:0;width:100%;height:100%;overflow:hidden;--edge-left:max(12px,env(safe-area-inset-left));--edge-right:max(12px,env(safe-area-inset-right));--edge-top:max(8px,env(safe-area-inset-top));--edge-bottom:max(8px,env(safe-area-inset-bottom))}.landscape-stage.rotated{inset:auto;left:50%;top:50%;width:100dvh;height:100vw;transform:translate(-50%,-50%) rotate(90deg)}.immersive .board-wrap{position:absolute;inset:0;display:flex;justify-content:center;align-items:center;border-radius:0}.immersive .hud{position:absolute;z-index:3;top:var(--edge-top);left:var(--edge-left);display:block;max-width:calc(100% - 260px);padding:7px 10px;border-radius:14px;pointer-events:none;margin:0}.immersive .hud-title small{font-size:9px}.immersive .hud-title strong{font-size:14px}.immersive .hud-metrics{font-size:11px;margin-top:3px}.immersive .hud-tools{position:absolute;right:var(--edge-right);top:var(--edge-top);z-index:4;gap:4px}.immersive .hud-tools button{width:44px;height:46px;padding:0;display:flex;align-items:center;justify-content:center;flex-direction:column}.immersive .hud-tools small{font-size:9px}.immersive .controls{position:absolute;inset:0;pointer-events:none;z-index:3;margin:0}.immersive .controls button{pointer-events:auto}.immersive .steering{position:absolute;left:var(--edge-left);bottom:var(--edge-bottom)}.immersive .steering button{width:64px;height:64px;border-radius:50%;font-size:28px}.immersive .action-controls{position:absolute;right:var(--edge-right);bottom:var(--edge-bottom);align-items:end}.immersive #jump{width:88px;height:70px;border-radius:40px}.immersive #interact{max-width:170px;font-size:13px;min-height:50px}.immersive button,.immersive .hud{background:#8093b42b;border:1px solid #d6e6ff66;box-shadow:inset 0 1px 1px #ffffff38,0 8px 25px #0003;backdrop-filter:blur(13px);-webkit-backdrop-filter:blur(13px);color:#fff}.immersive .primary{background:#a4ffeacf;color:#12303c;text-shadow:none}.immersive .control-note,.immersive .feedback{display:none}.immersive .pause-overlay button{background:#9effe9;color:#12303c}.immersive dialog{width:min(780px,calc(100% - 16px));max-height:calc(100% - 12px);position:absolute;inset:0;margin:auto;background:#16213beF}.immersive #workshop[open]{height:calc(100% - 12px);max-height:calc(100% - 12px);padding:8px 14px;gap:6px}.immersive .dialog-head h2{font-size:16px}.immersive #work-body{padding:0 2px}.immersive #work-body h3{font-size:17px}.immersive .task{font-size:13px;margin:4px 0 8px}.immersive .equation{font-size:22px;padding:8px}.immersive .tokens{margin:8px 0}.immersive .token{font-size:22px;min-height:52px}.immersive .estimate-row{margin:6px 0}.immersive #work-notice{font-size:12px;max-height:40px}.immersive .dialog-footer button{min-height:44px;padding:6px 10px;font-size:12px}.immersive .scroll-copy{max-height:calc(100% - 54px)}.immersive #finish{overflow:auto}.immersive #finish h2{margin:5px 0}.immersive #finish p{margin:8px 0}.immersive #finish .score-big{font-size:28px}
.immersive dialog{position:fixed;inset:auto;left:50%;top:50%;transform:translate(-50%,-50%);margin:0;width:min(780px,calc(100vw - 16px));max-height:calc(100dvh - 12px)}.immersive #workshop[open]{height:calc(100dvh - 12px);max-height:calc(100dvh - 12px)}.arcade-portrait dialog[open]{transform:translate(-50%,-50%) rotate(90deg);width:min(780px,calc(100dvh - 16px));max-height:calc(100vw - 12px)}.arcade-portrait #workshop[open]{height:calc(100vw - 12px);max-height:calc(100vw - 12px)}.arcade-portrait .scroll-copy{max-height:calc(100vw - 76px)}
@media(max-width:650px){.topbar{gap:10px;padding:12px}.topbar nav{order:3;flex-basis:100%;justify-content:space-between}.topbar>a:last-child{margin-left:auto}.panel{padding:20px}.hero{grid-template-columns:1fr 95px;gap:12px}.hero h1{font-size:32px}.hero-actions{grid-column:1/-1}.hero p{font-size:14px}.hud-title strong{font-size:17px}.hud-tools{gap:3px}.hud{gap:8px}.hud-metrics{width:100%;order:3}.controls{flex-wrap:wrap}.action-controls{flex:1}.action-controls button{flex:1;font-size:13px}.summary-grid{grid-template-columns:1fr 1fr}.record-form,.filters{grid-template-columns:1fr}.record-form>p,.record-form>button{grid-column:auto}.token{min-width:58px}.task{font-size:14px}.immersive .hud-metrics{width:auto}.immersive .action-controls{width:auto}.immersive .action-controls button{flex:none}}
@media(max-height:340px) and (orientation:landscape),(max-width:340px) and (orientation:portrait){.immersive .hud-title strong{font-size:12px}.immersive .steering button{height:52px;width:52px}.immersive #jump{height:54px;width:78px}.immersive .token{min-height:48px}.immersive .dialog-head small{font-size:10px}.immersive .dialog-head h2{font-size:14px}.immersive .equation{font-size:18px}}