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(width>=860px){.panel{max-height:none;padding:12px 14px 12px 6px}}.controls{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:6px 10px 8px;box-shadow:inset 0 1px #fff,0 6px 20px #3c280a0f}.controls h2{letter-spacing:.08em;text-transform:uppercase;color:var(--ink-soft);flex-wrap:wrap;align-items:center;gap:8px;margin:3px 0 1px;font-size:11px;font-weight:700;display:flex}.levels{flex-wrap:nowrap;gap:3px;margin:1px 0 3px;display:flex;overflow-x:auto}.lvl{border:1px solid var(--line-2);color:var(--ink);cursor:pointer;background:0 0;border-radius:6px;flex:none;min-width:28px;height:24px;padding:0 5px;font-size:12px;font-weight:700}.lvl.on{background:var(--accent);border-color:var(--accent);color:#fff}.lvl.done{border-color:var(--gold);color:var(--gold)}.lvl.done.on{background:var(--gold);color:#fff}.lvl.locked{opacity:.35;cursor:not-allowed}.lvl:focus-visible{outline:2px solid var(--water);outline-offset:2px}.ldesc{color:var(--ink);margin:0 0 4px;font-size:12px;line-height:1.3}.ldesc b{font-weight:700}.ldesc .lockline{color:var(--danger);font-weight:600;display:block}.grid{grid-template-columns:1fr 1fr;column-gap:12px;display:grid}.row{border-radius:6px;grid-template-columns:1fr auto auto;align-items:center;column-gap:6px;padding:1px 0;display:grid;position:relative}.row label{white-space:nowrap;text-overflow:ellipsis;color:var(--ink-soft);font-size:11.5px;font-weight:600;overflow:hidden}.row .val{white-space:nowrap;font-size:12.5px;font-weight:600}.row.solving .val{color:var(--water)}.row.impossible .val{color:var(--danger)}.row.locked{background:repeating-linear-gradient(135deg,#0000 0 6px,#c2410c12 6px 8px);padding-left:4px;padding-right:4px}.row.locked label:before{content:"🔒 ";font-size:10px}.row.locked label,.row.locked .val{color:var(--danger)}.row.limited label:after{content:" · " attr(data-limit);color:var(--danger);font-weight:600}.row input[type=range]{width:100%;accent-color:var(--thumb);grid-column:1/-1;height:16px;margin:0}.row.locked input[type=range]{accent-color:var(--danger);opacity:.5}.row input[type=range]:focus-visible{outline:2px solid var(--water);outline-offset:2px;border-radius:6px}.nudge{gap:3px;display:inline-flex}.nudge button{border:1px solid var(--line-2);width:22px;height:20px;color:var(--ink);cursor:pointer;touch-action:manipulation;background:#fff;border-radius:6px;padding:0;font:700 14px/1 Space Grotesk,sans-serif}.nudge button:disabled{opacity:.3;cursor:not-allowed}.nudge button:active:not(:disabled){background:var(--chip)}.presets,.surfaces{flex-wrap:wrap;gap:3px;display:inline-flex}.presets button,.surfaces button{border:1px solid var(--line-2);color:var(--ink);cursor:pointer;text-transform:none;letter-spacing:0;background:#fff;border-radius:6px;padding:2px 8px;font-size:11.5px;font-weight:600}.presets button:hover:not(:disabled),.surfaces button:hover:not(:disabled){border-color:var(--water)}.surfaces button.on{background:var(--accent);border-color:var(--accent);color:#fff}.presets button:disabled,.surfaces button:disabled{opacity:.4;cursor:not-allowed;background:0 0;text-decoration:line-through}.surfaces button:disabled:before{content:"🔒 ";font-size:9px}.surfaces.solving button{opacity:.5}.actionbar{flex-wrap:wrap;align-items:center;gap:6px;margin-top:6px;display:flex}.toggles{gap:4px;display:flex}.toggle{border:1px solid var(--line);cursor:pointer;color:var(--ink-soft);box-shadow:0 3px 0 var(--quiet-sh);background:#fff;border-radius:999px;align-items:center;gap:7px;padding:5px 11px 5px 5px;font-size:12.5px;font-weight:600;transition:color .15s,border-color .15s;display:inline-flex}.toggle .knob{background:#d8d0c0;border-radius:999px;flex:none;width:30px;height:18px;transition:background .18s;position:relative}.toggle .knob:after{content:"";background:#fff;border-radius:50%;width:14px;height:14px;transition:transform 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12px;font-size:12.5px}.btn.quiet:active{box-shadow:0 1px 0 var(--quiet-sh)}.btn.quiet[aria-pressed=true]{background:var(--chip);box-shadow:0 3px #b9ab8e}