@charset "UTF-8";:root{--bg: #0e1116;--bg2: #161b22;--card: #1c232d;--line: #2a323d;--text: #e6edf3;--muted: #9aa7b4;--accent: #4f8cff;--accent2: #2ea043;--radius: 14px}*{box-sizing:border-box}html,body{margin:0;height:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:radial-gradient(1200px 600px at 70% -10%,#1b2430,var(--bg));color:var(--text);min-height:100%}.top-bar{display:flex;align-items:center;justify-content:space-between;padding:16px 24px;border-bottom:1px solid var(--line);background:var(--bg2);width:100%}.top-bar-left{display:flex;align-items:center;gap:16px}.top-bar-title{font-size:20px;font-weight:600;color:var(--text);margin:0}.top-bar-right{display:flex;align-items:center;gap:16px}.top-bar-link{font-size:14px;color:var(--muted);text-decoration:none;font-weight:500;transition:color .15s;display:flex;align-items:center;gap:4px}.top-bar-link:hover{color:var(--accent)}.top-bar-donate{font-size:14px;font-weight:600;color:#fff;background:linear-gradient(135deg,#ff4d4f,#c3002f);padding:6px 14px;border-radius:999px;text-decoration:none;transition:filter .15s}.top-bar-donate:hover{filter:brightness(.9)}.top-bar-lang{font-size:13px;font-weight:600;color:var(--text);background:transparent;border:1px solid var(--line);padding:5px 12px;border-radius:999px;cursor:pointer;transition:border-color .15s,color .15s}.top-bar-lang:hover{border-color:var(--accent);color:var(--accent)}.mode-select{display:flex;background:var(--bg);padding:3px;border-radius:999px;border:1px solid var(--line)}.mode-btn{background:transparent;border:none;color:var(--muted);font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px;cursor:pointer;transition:background .15s,color .15s}.mode-btn:hover{color:var(--text)}.mode-btn.active{background:var(--accent);color:#fff}.tagline{margin:4px 0 0;color:var(--muted);font-size:14px}.tagline-container{padding:16px 24px 0;margin:0}.layout{display:grid;grid-template-columns:1fr 380px;gap:20px;padding:16px 24px 40px;align-items:start}@media (max-width: 900px){.layout{grid-template-columns:1fr;padding:12px 16px 30px;gap:16px}.top-bar{padding:10px 12px}.top-bar-title{font-size:16px}.top-bar-link,.top-bar-donate{font-size:12px;padding:5px 10px}.mode-btn{font-size:12px;padding:3px 10px}.tagline-container{padding:12px 16px 0}}@media (max-width: 550px){.top-bar-title{font-size:0}.top-bar-title:before{content:"🧩";font-size:20px}.top-bar-link{display:none!important}.top-bar-right{gap:8px}}.stage{background:linear-gradient(180deg,#11161d,#0c1015);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;position:sticky;top:16px}.cube3d{width:100%;height:480px;touch-action:none;cursor:grab}.cube3d canvas{width:100%!important;height:100%!important;display:block}.cube3d:active{cursor:grabbing}.stage-hint{padding:10px 14px;border-top:1px solid var(--line);color:var(--muted);font-size:13px;text-align:center}@media (max-width: 900px){.stage{position:static;margin-bottom:16px}.cube3d{height:350px}}.panel{display:flex;flex-direction:column;gap:16px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px}.card h2{margin:0 0 6px;font-size:15px;letter-spacing:.3px}.muted{color:var(--muted);font-size:13px;margin:4px 0 12px}.hidden{display:none!important}.palette{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-bottom:14px}.swatch{width:100%;min-width:0;aspect-ratio:1;border-radius:10px;border:3px solid transparent;cursor:pointer;position:relative;transition:transform .08s}.swatch:hover{transform:translateY(-2px)}.swatch.active{border-color:var(--text);box-shadow:0 0 0 2px var(--accent)}.method{display:flex;flex-direction:column;gap:8px}.radio{display:flex;align-items:center;gap:10px;border:1px solid var(--line);border-radius:10px;padding:10px 12px;cursor:pointer}.radio:has(input:checked){border-color:var(--accent);background:#1a2535}.radio span{display:flex;flex-direction:column}.radio small{color:var(--muted);font-size:12px}.radio input{accent-color:var(--accent)}.msg{margin-top:12px;font-size:13px;min-height:18px}.msg.err{color:#ff7b72}.msg.ok{color:#56d364}.msg.info{color:var(--accent)}.btn{border:1px solid var(--line);border-radius:10px;background:var(--bg2);color:var(--text);padding:9px 12px;cursor:pointer;font-size:13px;transition:background .12s,border-color .12s}.btn:hover{border-color:var(--accent)}.btn.ghost{background:transparent}.btn.small{padding:6px 10px;font-size:12px}.btn.primary{background:var(--accent);border-color:var(--accent);color:#fff;font-weight:600}.btn.primary:hover{filter:brightness(1.08)}.btn.big{width:100%;padding:13px;font-size:15px;margin-top:14px}.btn-row{display:flex;gap:8px}.btn-row .btn{flex:1}.play-head{display:flex;align-items:center;justify-content:space-between}.player{margin:14px 0;text-align:center}.counter{font-size:28px;font-weight:700;font-variant-numeric:tabular-nums}.stage-label{color:var(--accent);font-size:14px;min-height:20px;margin:4px 0 12px}.controls{display:flex;justify-content:center;gap:8px;margin-bottom:14px}.ctrl{width:46px;height:46px;border:1px solid var(--line);border-radius:12px;background:var(--bg2);color:var(--text);font-size:16px;cursor:pointer}.ctrl:hover{border-color:var(--accent)}.ctrl.play{background:var(--accent2);border-color:var(--accent2);color:#fff;width:56px}.speed{display:flex;align-items:center;gap:10px;justify-content:center;font-size:13px;color:var(--muted)}.speed input{accent-color:var(--accent)}.moves-head{display:flex;align-items:center;justify-content:space-between;margin:8px 0}.moves-title{font-size:13px;color:var(--muted)}.help-btn{flex-shrink:0;width:22px;height:22px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--muted);font-size:12px;font-weight:700;line-height:1;cursor:pointer}.help-btn:hover{border-color:var(--accent);color:var(--accent)}.help-panel{border:1px solid var(--line);border-radius:10px;background:var(--bg2);padding:10px 12px;margin-bottom:10px;font-size:13px}.help-row{display:flex;gap:8px;padding:2px 0}.help-row b{width:18px;color:var(--accent)}.help-note{margin-top:8px;padding-top:8px;border-top:1px solid var(--line);color:var(--muted);font-size:12px}.moves{display:flex;flex-wrap:wrap;gap:6px;max-height:260px;overflow-y:auto}.stage-group{width:100%}.stage-group .gname{font-size:12px;color:var(--accent);margin:8px 0 6px;font-weight:600}.stage-group .chips{display:flex;flex-wrap:wrap;gap:6px}.chip{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:13px;font-weight:600;padding:5px 9px;border:1px solid var(--line);border-radius:8px;background:var(--bg2);min-width:30px;text-align:center}.chip.done{opacity:.45}.chip.current{background:var(--accent);border-color:var(--accent);color:#fff;transform:scale(1.08)}