:root{color-scheme:dark;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;color:#ededed;background:#111;--background: #111;--panel: #181818;--cell: #222;--line: #555;--muted: #aaa;--green: #69c886;--yellow: #d5b548;--gray: #999;--red: #bd3c3c;--blue: #64b5d3}*{box-sizing:border-box}body{margin:0;min-width:320px;min-height:100vh;background:var(--background)}button,input{border:1px solid var(--line);background:#101010;color:inherit;font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.45}button:focus-visible,input:focus-visible{outline:2px solid var(--blue);outline-offset:-2px}#app{width:min(1800px,100%);margin:0 auto;padding:18px}.app-header{display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding-bottom:12px;margin-bottom:14px}h1{margin:0;font-size:clamp(1.5rem,3vw,2.4rem);font-weight:650}h2{margin:0;font-size:1rem}h3{margin:0 0 9px;font-size:.82rem;color:#ddd}.language-toggle{min-width:56px;padding:7px 10px}.workspace{display:grid;grid-template-columns:minmax(480px,1fr) 300px 300px;gap:14px;align-items:start}.board-panel,.control-panel,.readme-panel{border:1px solid var(--line);background:var(--panel)}.board-panel{position:relative;min-width:0;padding:10px;overflow:auto}.control-panel,.readme-panel{padding:14px}.settings-header{display:flex;justify-content:space-between;align-items:baseline;padding-bottom:12px}.runtime-state{color:var(--muted);font-size:.7rem;text-align:right}.runtime-state.ready{color:var(--green)}.runtime-state.error{color:#ff7979}.runtime-state.solving{color:var(--yellow)}.board-svg{display:block;width:100%;max-height:calc(100vh - 130px);touch-action:manipulation}.board-backdrop{fill:#181818;stroke:var(--line);stroke-width:1}.cell-surface{fill:var(--cell);stroke:var(--line);stroke-width:1}.board-cell{cursor:pointer}.board-cell:hover .cell-surface{fill:#303030}.optic-connection,.optic-reflector{stroke:#fff;stroke-width:7;stroke-linecap:butt}.optic-absorb{fill:#000;stroke:#555;stroke-width:1}.optic-absorb-all{stroke-width:1}.portal-ring{fill:none;stroke:#fff;stroke-width:5}.clue-control{width:64px;height:64px;border:1px solid var(--line);background:#111;display:grid;grid-template-rows:66% 34%}.clue-control input,.clue-control button{min-width:0;border:0;margin:0}.clue-control input{padding:2px 3px;text-align:center;font-weight:700}.clue.exited .clue-control input{background:var(--green);color:#111}.clue.returned .clue-control input{background:var(--yellow);color:#111}.clue.absorbed .clue-control input{background:var(--gray);color:#111}.clue.exited .number-step-buttons button{background:var(--green);color:#111}.clue.returned .number-step-buttons button{background:var(--yellow);color:#111}.clue.absorbed .number-step-buttons button{background:var(--gray);color:#111}.clue-type-buttons{display:grid;grid-template-columns:33% 33% 34%}.clue-type-buttons button+button{border-left:1px solid var(--line)}.clue-type-buttons .exited{background:var(--green)}.clue-type-buttons .returned{background:var(--yellow)}.clue-type-buttons .absorbed{background:var(--gray)}.clue.is-selected .clue-control{outline:2px solid #fff;outline-offset:-2px}.trace-layer{pointer-events:none}.laser-path{fill:none;stroke:#3fd7c8;stroke-width:4;stroke-linejoin:miter;stroke-linecap:butt;marker-end:url(#laser-arrow)}.laser-jump{fill:none;stroke:#b28ae0;stroke-width:4;stroke-dasharray:8 7}#laser-arrow path{fill:#3fd7c8}.path-status{min-height:1.3rem;margin:7px 0 0;color:var(--muted);font-size:.78rem}.view-toggle{display:flex;position:absolute;z-index:2;top:10px;left:10px}.view-toggle button{padding:5px 9px}.view-toggle button+button{border-left:0}.view-toggle button.active{background:#ddd;color:#111}.control-section{border-top:1px solid var(--line);padding:12px 0}.size-control{display:grid;grid-template-columns:1fr 82px;align-items:center;gap:10px}.size-control label{font-size:.82rem}input[inputmode=numeric]{padding:6px}.number-control{display:grid;grid-template-columns:66% 34%;width:100%;min-width:0;height:100%}.number-control>input{width:100%;min-width:0;height:100%}.number-step-buttons{display:grid;grid-template-rows:50% 50%;min-width:0;height:100%}.number-step-buttons button{width:100%;min-width:0;min-height:0;padding:0;line-height:1}.number-step-buttons button+button{border-top:0}.number-step-buttons button:hover{background:#333}.size-control .number-control{width:82px;height:38px}.clue-control .number-step-buttons{border-left:1px solid var(--line)}.clue-control .number-step-buttons button{border:0}.clue-control .number-step-buttons button+button{border-top:1px solid var(--line)}.clue.exited .number-step-buttons button:hover{background:#86d69d}.clue.returned .number-step-buttons button:hover{background:#e3c96d}.clue.absorbed .number-step-buttons button:hover{background:#b7b7b7}.inventory-list{display:grid;gap:6px}.inventory-item{display:grid;grid-template-columns:38px minmax(0,1fr) 82px;align-items:center;gap:8px;font-size:.76rem}.inventory-glyph{width:38px;height:38px;background:var(--cell);border:1px solid var(--line)}.inventory-item .number-control{width:82px;height:38px}.portal-note p{margin:4px 0 0;color:var(--muted);font-size:.75rem;line-height:1.4}.json-actions{display:grid;grid-template-columns:repeat(3,1fr)}.json-actions button{padding:7px 4px}.json-actions button+button{border-left:0}.solve-button,.reset-button{width:100%;padding:10px;font-weight:700}.solve-button{background:#267b74;border-color:#4db0a7}.solve-button.cancel,.reset-button{background:var(--red);border-color:#e06b6b;color:#fff}.reset-button{margin-top:12px}.message{display:none;margin:10px 0 0;padding:8px;border:1px solid #a84949;color:#ffb8b8;font-size:.75rem;overflow-wrap:anywhere}.message.visible{display:block}.readme-panel h2{padding-bottom:12px}.readme-content{min-height:420px;border-top:1px solid var(--line);padding-top:12px;line-height:1.5}.readme-content h3{margin-top:20px}.readme-content p{margin:0 0 12px;color:#bbb;font-size:.82rem}.visually-hidden{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}@media(max-width:1200px){.workspace{grid-template-columns:minmax(440px,1fr) 300px}.readme-panel{grid-column:1 / -1}.readme-content{min-height:220px}}@media(max-width:760px){#app{padding:8px}.workspace{grid-template-columns:1fr}.readme-panel{grid-column:auto}.board-panel{padding:4px}.board-svg{width:100%;max-height:none}.view-toggle{top:4px;left:4px}}