.circuit-stage{border:1px solid var(--line,#bbc4b1);background:var(--surface-gradient,#edf0e5);border-radius:var(--radius-lg,8px);max-width:560px;box-shadow:var(--shadow-2,inset 0 1px #fff);margin:0 auto;padding:28px}.circuit-stage button{-webkit-appearance:none;appearance:none;font:inherit;cursor:pointer;border:0;margin:0}.circuit-mono,.circuit-stats strong,.circuit-sizes small{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.circuit-heading{color:#7d826f;justify-content:space-between;align-items:center;gap:12px;display:flex}.circuit-heading .circuit-mono{letter-spacing:.11em;font-size:10px}.circuit-heading h2{color:#374031;letter-spacing:-.03em;margin-top:5px;font-size:18px;font-weight:530}#circuit-rule{color:#6b7361;margin:10px 0 17px;font-size:13px;line-height:1.8}.circuit-console{background:var(--surface-sunk,#e9ece1);border:1px solid var(--line,#c2c9b6);border-radius:var(--radius-md,8px);padding:16px;box-shadow:inset 0 1px 2px #00000008}.circuit-sizes{grid-template-columns:repeat(4,minmax(0,1fr));gap:5px;width:100%;display:grid}.circuit-sizes button{border:1px solid var(--line-strong,#bbc4af);color:#616e56;background:0 0;border-radius:3px;flex-direction:column;justify-content:center;align-items:center;gap:1px;min-height:44px;font-size:12px;display:flex}.circuit-sizes small{opacity:.75;font-size:10px}.circuit-sizes button[data-pressed]{color:#eff0df;background:#3d4c37;border-color:#3d4c37}.circuit-board-switch{color:#66725a;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin:12px 0 10px;font-size:12px;display:flex}.circuit-board-switch>span{align-items:center;gap:5px;display:inline-flex}.circuit-board-switch>div{gap:6px;display:flex}.circuit-board-switch button{color:#5d6e4d;background:0 0;border-radius:3px;align-items:center;gap:4px;min-height:34px;padding:0 10px;font-size:12px;display:inline-flex;border:1px solid var(--line-strong,#bbc4af)!important}.circuit-board-switch button:hover:not(:disabled),.circuit-actions button:hover:not(:disabled){color:#8f552d}.circuit-stats{color:#768169;justify-content:space-between;margin-bottom:10px;font-size:11px;display:flex}.circuit-stats strong{color:#49583e;font-size:21px;font-weight:500}.circuit-board{--circuit-size:5;grid-template-columns:repeat(var(--circuit-size), minmax(0, 1fr));width:min(100%, calc(var(--circuit-size) * 66px));background:#1f2a20;border:1px solid #172117;border-radius:6px;gap:3px;margin:auto;padding:8px;transition:border-color .3s,box-shadow .3s;display:grid;box-shadow:inset 0 2px 6px #0d150e99,0 1px #fff}.circuit-cell{aspect-ratio:1;touch-action:manipulation;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none;background:#2f3d2d;border-radius:4px;min-width:0;position:relative;box-shadow:inset 0 0 0 1px #435240;padding:0!important}.circuit-cell:hover:not([aria-disabled]){background:#364634}.circuit-cell:focus-visible{outline-offset:1px;z-index:1;outline:2px solid #f1d699}.circuit-cell>svg:not(.circuit-lock){width:100%;height:100%;display:block;overflow:visible}.circuit-wire{transform-box:view-box;transform-origin:50%;transition:transform .16s cubic-bezier(.3,.7,.4,1.2)}.circuit-wire line{stroke:#56664d;stroke-width:13px;stroke-linecap:butt;transition:stroke .2s}.circuit-joint{fill:#56664d;transition:fill .2s}.circuit-bulb{fill:#2a3628;stroke:#6f7f62;stroke-width:5px;transition:fill .2s,stroke .2s}.circuit-core{fill:#c98b4a;stroke:#f1d699;stroke-width:4px}.circuit-cell.is-on .circuit-wire line{stroke:#dcba78}.circuit-cell.is-on .circuit-joint{fill:#dcba78}.circuit-cell.is-on .circuit-bulb{fill:#f6d98f;stroke:#fff2cb;filter:drop-shadow(0 0 6px #f3c76caa)}.circuit-cell.is-source{background:#3a3a2a}.circuit-cell.is-locked{box-shadow:inset 0 0 0 1px #8b9e72,inset 0 0 0 4px #24302280}.circuit-lock{color:#b9c79f;position:absolute;top:3px;right:3px}.circuit-cell.is-hint{outline-offset:-2px;outline:2px solid #ffdc99;animation:1.2s ease-in-out infinite circuit-hint}@keyframes circuit-hint{50%{background:#4b4a32}}.circuit-play.is-solved .circuit-board{border-color:#8b9e72;box-shadow:0 0 0 3px #a0b58a40,0 0 26px #f3c76c33}.circuit-play.is-solved .circuit-cell{animation:.7s ease-out both circuit-surge;animation-delay:var(--delay,0s)}@keyframes circuit-surge{0%{background:#2f3d2d}40%{background:#6c5f36}to{background:#33402f}}.circuit-feedback{color:#58694b;text-align:center;justify-content:center;align-items:center;gap:5px;min-height:52px;padding:14px 0 8px;font-size:12px;line-height:1.6;display:flex}.circuit-actions{border-top:1px solid #c6ceba;grid-template-columns:repeat(4,1fr);gap:5px;display:grid}.circuit-actions button{color:#5d6e4d;background:0 0;border-radius:3px;justify-content:center;align-items:center;gap:5px;min-height:44px;font-size:12px;display:flex}.circuit-actions button.is-active{color:#eff0df;background:#3d4c37}.circuit-stage button:disabled{cursor:default;opacity:.45}.circuit-progress{color:#6f7a63;flex-wrap:wrap;justify-content:space-between;gap:10px;margin-top:12px;font-size:11px;display:flex}.circuit-storage{color:#8a9380;margin-top:8px;font-size:11px;display:block}@media (max-width:540px){.circuit-stage{padding:18px 12px}.circuit-console{padding:10px}.circuit-board{gap:2px;padding:5px}.circuit-actions button{gap:3px;font-size:11px}}@media (prefers-reduced-motion:reduce){.circuit-wire,.circuit-cell{transition:none;animation:none!important}}fieldset.circuit-board{min-width:0;margin-inline:auto}