:root{--bg:#0d1117;--panel:#151b23;--panel-raised:#1b222c;--line:#262e3a;--line-soft:#1e2530;--text:#d7dee8;--text-dim:#8895a7;--text-faint:#5d6a7b;--agent:#f5a623;--crystal:#4fd1c5;--pad:#a78bfa;--good:#4ade80;--bad:#f87171;--tok-op:#7dd3fc;--tok-control:#c084fc;--tok-sensor:#4fd1c5;--tok-label:#f5a623;--tok-comment:#5d6a7b;--mono:ui-monospace, "SF Mono", "JetBrains Mono", "Fira Code", Menlo, Consolas, monospace;--sans:ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--radius:8px;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*{box-sizing:border-box}body{background:var(--bg);color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0;font-size:15px;line-height:1.55}h1,h2,h3{margin:0;font-weight:600;line-height:1.25}code{font-family:var(--mono);background:var(--panel-raised);color:var(--tok-op);border-radius:4px;padding:.1em .35em;font-size:.9em}.app{max-width:1500px;margin:0 auto;padding:28px 24px 64px}.masthead{border-bottom:1px solid var(--line);flex-wrap:wrap;align-items:baseline;gap:18px;margin-bottom:24px;padding-bottom:20px;display:flex}.masthead h1{font-family:var(--mono);letter-spacing:.22em;font-size:22px;font-weight:600}.masthead-mark{color:var(--agent);margin-right:4px}.masthead-tagline{color:var(--text-dim);margin:0;font-size:14px}.layout{grid-template-columns:1fr;gap:24px;display:grid}@media (width<=899px){.stage{order:1}.workbench{order:2}.rail{order:3}}@media (width>=900px){.layout{grid-template-columns:220px minmax(0,1fr)}}@media (width>=1280px){.layout{grid-template-columns:220px minmax(0,1fr) minmax(0,1fr)}}.rail,.stage,.workbench{flex-direction:column;gap:18px;min-width:0;display:flex}.levels ol{flex-direction:column;gap:2px;margin:0;padding:0;list-style:none;display:flex}.level{width:100%;color:var(--text-dim);font:inherit;text-align:left;cursor:pointer;background:0 0;border:0;border-left:2px solid #0000;border-radius:0 4px 4px 0;grid-template-columns:auto 1fr auto;align-items:baseline;gap:10px;padding:7px 10px;font-size:13.5px;display:grid}.level:hover{background:var(--panel);color:var(--text)}.level.is-current{background:var(--panel);border-left-color:var(--agent);color:var(--text)}.level-number{font-family:var(--mono);color:var(--text-faint);font-size:11px}.level.is-solved .level-number{color:var(--good)}.level-score{font-family:var(--mono);color:var(--text-faint);font-size:11px}.savemenu{border-top:1px solid var(--line);padding-top:16px}.savemenu h2{text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint);font-size:12px}.savemenu-note{color:var(--text-dim);margin:6px 0 10px;font-size:12.5px}.savemenu-buttons{flex-wrap:wrap;gap:6px;display:flex}.savemenu-status{color:var(--good);margin:10px 0 0;font-size:12.5px}.brief{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}.brief-head{flex-wrap:wrap;align-items:baseline;gap:12px;margin-bottom:10px;display:flex}.brief h2{font-size:19px}.brief-teaches{font-family:var(--mono);color:var(--agent);background:#f5a6231a;border:1px solid #f5a62340;border-radius:999px;padding:2px 9px;font-size:11.5px}.brief p{color:var(--text-dim);margin:0 0 12px;font-size:14px}.brief code{color:var(--tok-op)}.objectives{color:var(--text);margin:0 0 12px;padding-left:18px;font-size:13.5px}.objectives li::marker{color:var(--pad)}.par{font-family:var(--mono);color:var(--text-faint);margin:0;font-size:12px}.viewport{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);flex:auto;justify-content:center;align-items:center;min-height:260px;padding:20px;display:flex}.world{max-width:100%;height:auto}.board{fill:#080a0e}.cell{fill:#202a38}.pad{fill:#a78bfa1f;stroke:var(--pad);stroke-width:1.5px}.crystal{fill:var(--crystal)}.marker{stroke:#6b788a;stroke-width:1.75px;stroke-linecap:round;fill:none}.agent{transition-property:transform;transition-timing-function:ease-in-out}.glide-slow{transition-duration:.17s}.glide-medium{transition-duration:.11s}.glide-fast{transition-duration:50ms}.glide-instant{transition-duration:0s}.agent-body{fill:var(--agent);stroke:#201603;stroke-width:1.25px;stroke-linejoin:round}.controls{flex-wrap:wrap;align-items:center;gap:16px;display:flex}.controls-transport,.controls-speed{gap:6px;display:flex}.button{font:inherit;border:1px solid var(--line);background:var(--panel-raised);color:var(--text);cursor:pointer;border-radius:6px;padding:7px 14px;font-size:13.5px}.button:hover:not(:disabled){background:#222b36;border-color:#36404f}.button:disabled{opacity:.4;cursor:default}.button-primary{background:var(--agent);border-color:var(--agent);color:#1a1204;font-weight:600}.button-primary:hover:not(:disabled){background:#ffb734;border-color:#ffb734}.button-small{padding:5px 10px;font-size:12px}.button-quiet{color:var(--text-dim);background:0 0}.chip{font-family:var(--mono);border:1px solid var(--line);color:var(--text-faint);cursor:pointer;background:0 0;border-radius:5px;padding:5px 9px;font-size:11.5px}.chip.is-on{color:var(--text);background:var(--panel-raised);border-color:#3b4757}.counters{gap:18px;margin:0 0 0 auto;display:flex}.counters div{text-align:right}.counters dt{text-transform:uppercase;letter-spacing:.09em;color:var(--text-faint);font-size:10.5px}.counters dd{font-family:var(--mono);color:var(--text);margin:0;font-size:17px}.status{border-radius:var(--radius);border:1px solid var(--line);background:var(--panel);min-height:46px;padding:12px 16px;font-size:13.5px}.status ul{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.status-line{font-family:var(--mono);color:var(--text-faint);margin-right:4px;font-size:12px}.status-idle{color:var(--text-dim)}.status-error,.status-crashed{color:#fca5a5;border-color:#f8717159}.status-halted{color:#f7c469;border-color:#f5a6234d}.status-won{color:#86efac;background:#4ade800d;border-color:#4ade8066}.editor{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);flex:auto;grid-template-columns:auto minmax(0,1fr);min-height:420px;display:grid;overflow:hidden}.editor-gutter,.editor-code,.editor-input{font-family:var(--mono);tab-size:2;border:0;margin:0;padding:14px 0;font-size:13px;line-height:1.65}.editor-gutter{text-align:right;color:var(--text-faint);background:var(--line-soft);-webkit-user-select:none;user-select:none;padding-left:12px;padding-right:10px;overflow:hidden}.editor-body{position:relative;overflow:hidden}.editor-code{white-space:pre;pointer-events:none;color:var(--text);padding-left:12px;padding-right:12px;position:absolute;inset:0;overflow:hidden}.editor-input{color:#0000;width:100%;height:100%;caret-color:var(--agent);resize:none;white-space:pre;background:0 0;outline:none;padding-left:12px;padding-right:12px;position:absolute;inset:0;overflow:auto}.editor-input::selection{background:#7dd3fc40}.editor-line{min-height:1.65em;margin-left:-12px;margin-right:-12px;padding-left:12px;padding-right:12px;display:block}.editor-gutter .editor-line{margin:0;padding:0}.editor-line.is-active{box-shadow:inset 2px 0 0 var(--agent);background:#f5a62321}.editor-gutter .editor-line.is-active{color:var(--agent);background:#f5a6231a}.editor-line.has-error{background:#f871711a}.editor-gutter .editor-line.has-error{color:var(--bad)}.tok-op{color:var(--tok-op)}.tok-control{color:var(--tok-control)}.tok-sensor{color:var(--tok-sensor)}.tok-label,.tok-ref{color:var(--tok-label)}.tok-comment{color:var(--tok-comment);font-style:italic}.reference{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);margin-top:24px;padding:18px 20px}.reference h2{text-transform:uppercase;letter-spacing:.1em;color:var(--text-faint);font-size:12px}.reference-note{color:var(--text-dim);margin:8px 0 16px;font-size:13px}.reference-grid{grid-template-columns:1fr;gap:18px;display:grid}@media (width>=620px){.reference-grid{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}}.reference-section h3{color:var(--text);margin-bottom:8px;font-size:12px}.reference dl{flex-direction:column;gap:7px;margin:0;display:flex}.reference-row dt{margin:0}.reference-row dd{color:var(--text-dim);margin:1px 0 0;font-size:12.5px;line-height:1.45}.reference-row code{color:var(--tok-op);background:0 0;padding:0;font-size:12.5px}.colophon{border-top:1px solid var(--line);margin-top:40px;padding-top:18px}.colophon p{max-width:68ch;color:var(--text-faint);margin:0;font-size:12.5px}.colophon code{color:var(--text-dim);background:0 0;padding:0}:focus-visible{outline:2px solid var(--tok-op);outline-offset:2px}@media (prefers-reduced-motion:reduce){.agent{transition:none}}