:root{--lightningcss-light:initial;--lightningcss-dark: ;color-scheme:light;--bg:#f5f1e8;--panel:#fffaf1;--panel-strong:#f0e8dc;--line:#d5c9b9;--line-soft:#e6dccd;--text:#1d252b;--muted:#65727d;--red:#dc443c;--orange:#ff8f24;--yellow:#ffd33d;--green:#2bc16d;--blue:#2d7bff;--white:#f8f3e7;--shadow:0 22px 60px #362b1f29;font-family:Bahnschrift,Segoe UI,sans-serif}*{box-sizing:border-box}html,body,#app{width:100%;height:100%}body{background:linear-gradient(90deg, #2d7bff14 1px, transparent 1px), linear-gradient(0deg, #1d252b0e 1px, transparent 1px), var(--bg);color:var(--text);background-size:48px 48px,48px 48px,auto;margin:0;overflow:hidden}button,input,select{font:inherit}button{border:1px solid var(--line);min-height:40px;color:var(--text);cursor:pointer;background:#fffdf8;border-radius:6px;transition:border-color .16s,background .16s,transform .16s}button:hover{background:#f3eadc;border-color:#9aa6af}button:active{transform:translateY(1px)}button.active{border-color:var(--yellow);color:#7a5300;background:#fff4bd}input[type=text]{border:1px solid var(--line);width:100%;min-width:0;color:var(--text);background:#fffdf8;border-radius:6px;outline:none;padding:0 12px}select{border:1px solid var(--line);width:100%;min-width:0;min-height:40px;color:var(--text);background:#fffdf8;border-radius:6px;outline:none;padding:0 10px}select:focus,input[type=text]:focus{border-color:var(--blue);box-shadow:0 0 0 3px #2d7bff29}input[type=range]{width:100%;min-width:0;accent-color:var(--green)}.app-shell{grid-template-columns:minmax(0,1fr) 372px;height:100svh;min-height:560px;display:grid}.cube-stage{background:radial-gradient(circle at 50% 45%,#ffffffe6,#0000 36%),linear-gradient(135deg,#2bc16d14,#0000 30%),#f5f1e8;min-width:0;min-height:0;position:relative;overflow:hidden}#cube-canvas{touch-action:none;cursor:grab;width:100%;height:100%;display:block}#cube-canvas:active{cursor:grabbing}.stage-head{z-index:1;pointer-events:none;justify-content:space-between;align-items:flex-start;gap:24px;padding:24px 28px 0;display:flex;position:absolute;top:0;left:0;right:0}.eyebrow{color:var(--green);margin:0 0 5px;font-family:Cascadia Code,Consolas,monospace;font-size:12px}h1{margin:0;font-size:32px;font-weight:700;line-height:1}.metrics{flex-wrap:wrap;justify-content:flex-end;align-items:center;gap:8px;max-width:520px;display:flex}.metrics span{min-height:32px;color:var(--muted);background:#fffdf8d1;border:1px solid #1d252b1f;border-radius:6px;align-items:center;padding:0 10px;font-family:Cascadia Code,Consolas,monospace;font-size:12px;display:inline-flex}.metrics strong{color:var(--text);margin-right:5px}.control-rail{border-left:1px solid var(--line);background:linear-gradient(180deg, #dc443c12, transparent 22%), var(--panel);min-width:0;min-height:0;box-shadow:var(--shadow);flex-direction:column;gap:0;display:flex;overflow-y:auto}.control-section,.history-section{border-bottom:1px solid var(--line-soft);padding:20px}.section-title{color:var(--muted);justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px;font-family:Cascadia Code,Consolas,monospace;font-size:12px;display:flex}.section-title span{color:var(--text);font-family:Bahnschrift,Segoe UI,sans-serif;font-size:15px;font-weight:700}.section-title output{text-align:right;min-width:64px;color:var(--yellow)}.segmented{grid-template-columns:repeat(6,minmax(0,1fr));gap:6px;display:grid}.turn-controls{grid-template-columns:repeat(3,minmax(0,1fr));margin-top:12px}.slider-row{color:var(--muted);grid-template-columns:48px minmax(0,1fr) 42px;align-items:center;gap:10px;margin-top:16px;font-size:13px;display:grid}.select-row{color:var(--muted);grid-template-columns:48px minmax(0,1fr);align-items:center;gap:10px;margin-bottom:14px;font-size:13px;display:grid}.slider-row output{color:var(--text);text-align:right;font-family:Cascadia Code,Consolas,monospace}.primary-action{color:#146c3a;background:#e3f7eb;border-color:#2bc16db8;width:100%;margin-top:14px;font-weight:700}.action-grid,.view-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:8px;display:grid}.view-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.algorithm-row{grid-template-columns:minmax(0,1fr) 72px;gap:8px;min-height:42px;display:grid}.error-line{color:#ff8a78;min-height:18px;margin:10px 0 0;font-family:Cascadia Code,Consolas,monospace;font-size:12px;line-height:1.4}#move-history{white-space:pre-wrap;word-break:break-word;border:1px solid var(--line);color:#2f3c44;background:#fffdf8;border-radius:6px;min-height:116px;max-height:220px;margin:0;padding:12px;font-family:Cascadia Code,Consolas,monospace;font-size:12px;line-height:1.55;overflow:auto}@media (width<=920px){body{overflow:auto}.app-shell{grid-template-rows:minmax(420px,58svh) auto;grid-template-columns:1fr;min-height:100svh}.control-rail{border-top:1px solid var(--line);border-left:0;max-height:none}.stage-head{flex-direction:column;gap:14px;padding:18px}h1{font-size:28px}.metrics{justify-content:flex-start}}@media (width<=520px){.app-shell{grid-template-rows:minmax(360px,54svh) auto}.stage-head{padding:14px}h1{font-size:24px}.control-section,.history-section{padding:16px}.segmented,.turn-controls,.action-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.slider-row{grid-template-columns:44px minmax(0,1fr) 40px}}