@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600&family=Space+Grotesk:wght@400;500;600&display=swap');
:root{color-scheme:dark;--bg:#10191d;--fg:#e7e9dc;--muted:#93a09d;--line:#2e3c40}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font-family:'DM Sans',sans-serif}main{max-width:1360px;margin:auto;padding:30px 54px}header{display:flex;justify-content:space-between;align-items:center;padding-bottom:26px;border-bottom:1px solid var(--line)}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer;color:inherit;border:1px solid var(--line);background:transparent;border-radius:7px;padding:12px 16px;transition:background .15s}button:hover{background:#26363c}button:focus-visible,a:focus-visible{outline:2px solid #d8fa8f;outline-offset:4px}button:disabled{opacity:.35;cursor:default}.brand{font:600 30px 'Space Grotesk',sans-serif;color:inherit;text-decoration:none;letter-spacing:-2px}.brand span{font-size:13px;color:var(--muted);letter-spacing:0}.edition,.eyebrow,footer,.circuit-label{font-size:10px;letter-spacing:2px;color:var(--muted)}.quiet{border:0;font-size:12px}.intro{display:flex;justify-content:space-between;align-items:end;padding:38px 0 32px}.eyebrow{margin-bottom:16px}h1{font:400 clamp(30px,3.5vw,48px)/1.1 'Space Grotesk',sans-serif;letter-spacing:-2px;margin:0}h1 span{color:#9fad9e}.intro p{font-size:13px;line-height:1.9;color:var(--muted);margin:0 0 5px}.game{display:grid;grid-template-columns:170px minmax(260px,580px) 170px;justify-content:space-between;gap:28px;border-top:1px solid var(--line);padding:30px 0 22px}aside{padding-top:10px}#shapes{display:grid;gap:8px}#shapes button{text-align:left;font-size:13px;border-color:transparent}#shapes button.selected{background:#253438;border-color:#41534e;color:#d8fa8f}.circuit-label{margin:36px 0 16px}.circuit{font-size:12px;margin:14px 0;display:flex;align-items:center;gap:10px}.dot{width:9px;height:9px;border-radius:50%;background:var(--c)}.circuit small{margin-left:auto;color:var(--muted)}.seed{margin-top:30px;color:#61726f;font:10px monospace}.playfield{background:radial-gradient(ellipse at center,#233b3b33,transparent 75%);min-width:0}#board{display:grid;aspect-ratio:1;width:100%;padding:7px;gap:3px;touch-action:manipulation}.tile{position:relative;padding:0;border-radius:12px;border:1px solid #334346;background:#1a282e;aspect-ratio:1;min-width:0;overflow:visible}.tile:hover{background:#24373d;border-color:#69837b;z-index:1}.tile svg{display:block;width:100%;height:100%;overflow:visible}.tile .rotor{transform-origin:50px 50px;transition:transform .17s ease-out}.tile.won{background:#253c35;border-color:#537b60}.tile .strand{fill:none;stroke-linecap:round;stroke-linejoin:round}.tile.checking .bad{fill:#fff;stroke:#ff8076;stroke-width:2;animation:pulse .6s alternate 3}@keyframes pulse{to{r:6}}.moves{margin-bottom:28px}.moves span{font:400 45px 'Space Grotesk';display:block}.moves small{font-size:9px;color:var(--muted);letter-spacing:2px}.right button{width:100%;font-size:12px;margin:0 0 10px;text-align:left}.hint{font-size:11px;line-height:1.9;color:var(--muted);margin-top:24px}footer{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:24px;font-size:9px;letter-spacing:1.4px}dialog{max-width:460px;padding:38px;border:1px solid #54665b;border-radius:18px;background:#18272b;color:var(--fg)}dialog::backdrop{background:#050c10bb;backdrop-filter:blur(5px)}dialog h2{font:400 30px 'Space Grotesk'}dialog p{font-size:14px;line-height:1.8;color:#bac7c1}.close{float:right;padding:4px 10px;font-size:22px} @media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.game{border-top:0;grid-template-columns:190px minmax(260px,580px) 190px;padding-top:32px;align-items:start}
.worlds{padding:16px 12px;border:1px solid #364b4b;border-radius:12px;background:#17262b}
.worlds>.eyebrow{color:#c6d9cb;font-size:11px;letter-spacing:1.6px;margin:0 0 18px 3px}
#shapes{gap:10px}
#shapes button{display:flex;align-items:center;gap:14px;padding:14px 12px;min-height:70px;border:1px solid #405751;background:#203238;color:#d8e4dd}
#shapes button:hover{background:#2d4546;border-color:#91b8a0}
#shapes button.selected{background:#d0e9a6;border-color:#d0e9a6;color:#203228;box-shadow:0 3px 14px #0003}
#shapes button span{font-weight:600;text-align:left}
#shapes button small{display:block;font-size:10px;font-weight:400;opacity:.7;margin-top:5px}
.shape-icon{width:32px;height:32px;flex-shrink:0;fill:currentColor;opacity:.8;pointer-events:none}
.seed{margin:20px 3px 0;color:#99aaa3;font-size:9px;overflow-wrap:anywhere}
.right{padding-top:0}
.circuit-panel{padding:18px 14px;background:#18272b;border:1px solid #354646;border-radius:12px;margin-bottom:25px}
.circuit-panel .circuit-label{margin:0 0 20px;color:#c6d9cb}
.circuit{gap:8px;margin:16px 0}.circuit:last-child{margin-bottom:0}.circuit small{font-size:10px}
@media(max-width:1000px){
 main{padding:24px}.game{grid-template-columns:150px minmax(240px,1fr) 160px;gap:16px}
 #shapes button{gap:10px;padding:12px 8px}.shape-icon{width:25px;height:25px}
 .worlds{padding:14px 8px}.worlds>.eyebrow{font-size:9px}
}
@media(max-width:740px){
 main{padding:18px}header{gap:12px;flex-wrap:wrap}.brand{font-size:27px}
 .game{grid-template-columns:1fr 1fr;gap:18px;padding-top:22px}
 .worlds{grid-column:1;grid-row:1}.right{display:contents}
 .circuit-panel{grid-column:2;grid-row:1;align-self:start;margin:0}
 .playfield{grid-column:1/-1;grid-row:2}
 #shapes{grid-template-columns:1fr 1fr;gap:7px}
 #shapes button{flex-direction:column;align-items:center;gap:7px;min-height:80px;padding:10px 3px;font-size:11px}
 #shapes button span{text-align:center}#shapes button small{display:none}
 .shape-icon{width:24px;height:24px}.seed{display:none}
 .worlds>.eyebrow{font-size:9px;letter-spacing:.8px}
 .moves{margin:0;grid-column:1/-1;display:flex;gap:10px;align-items:baseline}
 .moves span{font-size:28px}.right button{margin:0;text-align:center}
 .hint{grid-column:1/-1;margin:0}.tile{border-radius:8px}
}

/* The completed board remains bright and locked until a new scramble. */
.tile.won:disabled{opacity:1;cursor:default;background:#253c35;border-color:#789b79;box-shadow:inset 0 0 18px #b8e6a012}
.tile.won:hover{z-index:auto;background:#253c35;border-color:#789b79}
.solved .strand[data-color]{filter:drop-shadow(0 0 2px var(--strand));animation:circuit-shine 1.6s ease-out both}
.solved .tile{animation:tile-settle .7s ease-out both}
.circuit-panel.complete{border-color:#a9d8b3;box-shadow:0 0 22px #a9d8b31a}
.circuit-panel.complete .circuit-label{color:#d0e9a6}
.circuit-panel.complete .dot{box-shadow:0 0 8px var(--c)}
.circuit-panel.complete small{color:#d0e9a6}
@keyframes circuit-shine{0%{filter:drop-shadow(0 0 0px var(--strand));stroke-width:4}35%{filter:drop-shadow(0 0 7px var(--strand)) brightness(1.5);stroke-width:5.2}100%{filter:drop-shadow(0 0 2px var(--strand));stroke-width:4}}
@keyframes tile-settle{0%{box-shadow:inset 0 0 0 #d0e9a600}45%{box-shadow:inset 0 0 30px #d0e9a633}100%{box-shadow:inset 0 0 18px #b8e6a012}}

/* A matched port lights its adjoining quarter of the strand. */
.connection-glow{opacity:0;pointer-events:none;transition:opacity .17s ease;filter:drop-shadow(0 0 3px var(--strand)) brightness(1.35)}
.connection-glow.connected{opacity:.85}
[data-port]{transition:filter .17s ease}
[data-port].connected{filter:drop-shadow(0 0 3px var(--strand)) brightness(1.5)}
.strand.circuit-closed{filter:drop-shadow(0 0 3px var(--strand)) brightness(1.25)}
.circuit.closed .dot{box-shadow:0 0 8px var(--c)}
.circuit.closed small{color:#d0e9a6}

#specimen-search{margin-top:22px;padding-top:18px;border-top:1px solid var(--line)}
#specimen-search label{display:block;font-size:12px;color:#d8e4dd;margin-bottom:10px}
.search-row{display:flex;gap:5px;min-width:0}.search-row input{width:0;flex:1;min-width:0;background:#10191d;border:1px solid #4e6762;border-radius:6px;padding:10px 8px;color:var(--fg);font:11px 'DM Sans',sans-serif}
.search-row button{font-size:11px;padding:8px}.search-row input:focus-visible{outline:2px solid #d0e9a6;outline-offset:2px}
#search-error{font-size:11px;color:#f0b9a7;line-height:1.5;margin:8px 0 0;overflow-wrap:anywhere}#search-error:empty{display:none}
.copy-specimen{width:100%;font-size:11px;margin-top:10px;padding:10px 6px;border-color:#4e6762}
.replay{display:flex;align-items:center;gap:8px;margin:0 0 12px}.right .replay button{width:38px;flex:none;text-align:center;margin:0;padding:9px}
#turn-position{flex:1;text-align:center;font:11px monospace;color:#c1cec6}
#share-progress{border-color:#789b79;color:#d0e9a6}
#copy-text{width:100%;min-height:240px;background:#10191d;color:var(--fg);border:1px solid #4e6762;padding:12px;font:12px/1.6 monospace}
@media(max-width:740px){#specimen-search{margin-top:14px;padding-top:12px}.search-row{flex-wrap:wrap}.search-row input{flex-basis:80px}.copy-specimen{font-size:10px}.replay{grid-column:1/-1;margin:0}.right .replay button{width:48px}#turn-position{flex:none;min-width:70px}.worlds .seed{display:block;font-size:8px;margin-top:12px}}

.result-share-slot{height:34px;margin:0 0 14px;display:flex;align-items:center}
.right #share-result{visibility:hidden;width:auto;margin:0;padding:4px 0;border:0;border-radius:0;background:none;color:#d0e9a6;font-size:12px;text-decoration:underline;text-underline-offset:4px}
.result-share-slot.available #share-result{visibility:visible}
.right #share-result:hover{color:#e7ffc8}.right #share-result:disabled{opacity:1}
.seed-help{font-size:10px;line-height:1.5;color:var(--muted);margin:8px 0 0}
@media(max-width:740px){.result-share-slot{grid-column:1/-1;height:34px;margin:0}}

#seed-name{color:#d8e4dd;font-size:11px}#seed-code{display:block;color:#93a09d;margin-top:6px;font-size:9px}#seed-code:empty{display:none}
#random-seed{width:100%;margin-top:8px;padding:8px;font-size:11px;border-color:#4e6762}

/* Actions keep their labels and geometry while clipboard feedback changes. */
.button-icon{width:17px;height:17px;flex:0 0 17px;pointer-events:none}
button:has(>.button-icon){display:flex;align-items:center;justify-content:flex-start;gap:8px;min-height:44px}
button>span{min-width:0}
.share-panel{padding:10px;border:1px solid var(--line);border-radius:10px;background:#17262b;margin-bottom:20px}
#share-heading{margin:4px 6px 10px;font-size:11px;font-weight:500;letter-spacing:1.6px;text-transform:uppercase;color:#c6d9cb}
.share-panel .result-share-slot{height:44px;margin:0 0 6px}
.right .share-panel #share-result,.right .share-panel #share-progress{width:100%;min-height:44px;margin:0;padding:9px 6px;text-align:left;border:0;border-radius:6px;text-decoration:none;color:#d0e9a6;background:transparent}
.right .share-panel button:hover{background:#26363c}
.copy-feedback{min-height:18px;margin:6px 0 0;font-size:11px;line-height:18px;color:#d0e9a6}
#specimen-feedback{text-align:center}
.right .replay button{min-width:44px;min-height:44px}
.circuit-label{overflow-wrap:anywhere}.circuit{flex-wrap:wrap}.dot{flex-shrink:0}
.worlds,.right{min-width:0}.moves{margin-bottom:12px}
header nav{display:flex;flex-wrap:wrap;align-items:center;gap:8px}
@media(min-width:741px) and (max-width:1000px){.game{grid-template-columns:150px minmax(210px,1fr) 180px;gap:14px}main{padding:20px}}
@media(max-width:740px){
 .game{grid-template-columns:minmax(0,1fr);gap:20px}
 .worlds{grid-column:1;grid-row:1}.playfield{grid-column:1;grid-row:2}
 .right{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;grid-column:1;grid-row:3}
 #shapes{grid-template-columns:repeat(4,minmax(0,1fr))}
 #shapes button{min-width:0}
 .circuit-panel{grid-column:1/-1;grid-row:auto;margin:0}
 #circuits{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}
 .circuit{margin:0;gap:6px}.circuit:last-child{margin:0}.circuit small{margin-left:0}
 .circuit-panel .circuit-label{margin-bottom:14px}
 .moves{grid-column:1/-1}.share-panel{grid-column:1/-1;margin:0}
 .right .result-share-slot{margin-bottom:6px;height:44px}
 .right .replay{grid-column:1/-1;margin:0}.right #turn-position{flex:1}
 .right>button{min-height:48px;padding:10px;font-size:12px}
 .hint{grid-column:1/-1}
 #specimen-search{margin-top:12px}.search-row input{font-size:16px}
 #random-seed,.copy-specimen{justify-content:center}
}
@media(max-width:360px){main{padding:12px}.right{grid-template-columns:minmax(0,1fr)}.right>button{grid-column:1}.worlds>.eyebrow{font-size:10px}}