.chess-nav,.chess-page{width:min(1180px,90%);margin-inline:auto}.chess-page{max-width:calc(clamp(400px,100svh - 290px,640px) + 360px)}.chess-nav{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;gap:20px;padding-block:22px;display:flex}.chess-owner{color:var(--muted)}.chess-heading{justify-content:space-between;align-items:end;gap:24px;padding-block:28px 20px;display:flex}.chess-heading .mono{color:var(--muted);margin:0 0 12px}.chess-heading h1{letter-spacing:-.065em;margin:0;font:700 clamp(42px,6vw,58px)/1 Courier New,monospace}.chess-heading h1 span{color:var(--muted)}.chess-heading>p{color:var(--muted);margin:0 0 3px;font-size:14px;line-height:1.8}.chess-game{grid-template-columns:minmax(0,1fr) 330px;align-items:start;gap:30px;display:grid}.board-column{min-width:0}.player-strip{justify-content:space-between;align-items:center;gap:12px;padding-block:12px;font:14px Courier New,monospace;display:flex}.player-identity{align-items:center;gap:12px;display:flex}.player-token{background:var(--ink);width:32px;height:32px;color:var(--paper);place-items:center;font-weight:700;display:grid}.player-token.human{border:1px solid var(--ink);color:var(--ink);background:0 0}.player-strip small{color:var(--muted);margin-left:8px;font-size:11px}.player-tag{color:var(--muted);text-align:right;font-size:10px}.board-frame{box-shadow:5px 5px 0 var(--line);border:4px solid #171717;position:relative}.chess-board{aspect-ratio:1;grid-template-columns:repeat(8,minmax(0,1fr));display:grid}.chess-square{aspect-ratio:1;color:#f5f5f5;cursor:pointer;touch-action:manipulation;background:#686868;border:0;border-radius:0;place-items:center;padding:0;display:grid;position:relative}.chess-square.light{color:#303030;background:#e8e8e8}.chess-square[aria-disabled=true]{cursor:default}.chess-square .piece{pointer-events:none;width:100%;height:100%}.piece img{width:100%;height:100%;display:block}.chess-square.last:after{content:"";opacity:.65;pointer-events:none;border:2px dashed;position:absolute;inset:4%}.chess-square.selected{box-shadow:inset 0 0 0 4px #171717,inset 0 0 0 7px #fff}.chess-square.legal:before{content:"";z-index:1;pointer-events:none;background:#171717;outline:2px solid #fafafa;width:18%;height:18%;position:absolute}.chess-square.legal.occupied:before{background:0 0;border:3px solid #171717;width:86%;height:86%}.chess-square.check{background:repeating-linear-gradient(135deg,#8c8c8c 0 5px,#b4b4b4 5px 10px);box-shadow:inset 0 0 0 4px #171717}.chess-square:focus-visible{outline-offset:-5px;z-index:2;outline:3px solid #fff;box-shadow:inset 0 0 0 8px #171717}.rank-label,.file-label{pointer-events:none;font:700 clamp(9px,1vw,12px)/1 Courier New,monospace;position:absolute}.rank-label{top:5%;left:5%}.file-label{bottom:4%;right:5%}.board-help{color:var(--muted);max-width:66ch;margin:12px 0 0;font:11px/1.7 Courier New,monospace}.game-sidebar{padding-top:56px}.game-panel{border:1px solid var(--line)}.setup-panel{padding:24px}.panel-eyebrow{text-transform:uppercase;letter-spacing:.12em;color:var(--muted);margin:0 0 16px;font:10px Courier New,monospace}.setup-panel h2{letter-spacing:-.05em;font:700 23px/1.25 Courier New,monospace}#game-detail{color:var(--muted);min-height:40px;margin:12px 0 20px;font-size:12px;line-height:1.7}.colour-picker{border:0;gap:8px;margin:0 0 16px;padding:0;display:flex}.colour-picker legend{color:var(--muted);margin-bottom:10px;font:11px Courier New,monospace}.colour-picker label{flex:1;position:relative}.colour-picker input{opacity:0;cursor:pointer;width:100%;height:100%;margin:0;position:absolute}.colour-picker span{border:1px solid var(--line);text-align:center;padding:12px;font:12px Courier New,monospace;display:block}.colour-picker input:checked+span{border:1px solid var(--ink);box-shadow:inset 0 -3px var(--ink)}.colour-picker input:focus-visible+span{outline:2px solid var(--ink);outline-offset:3px}.play-button{background:var(--ink);width:100%;min-height:48px;color:var(--paper);border:1px solid var(--ink);cursor:pointer;box-shadow:3px 3px 0 var(--line);justify-content:space-between;align-items:center;padding:13px 16px;font:700 13px Courier New,monospace;display:flex}.play-button:hover{opacity:.85}.play-button:disabled{opacity:.55;cursor:wait}.download-note{color:var(--muted);margin:16px 0 0;font:10px/1.7 Courier New,monospace}.moves-panel{margin-top:16px}.panel-title{border-bottom:1px solid var(--line);justify-content:space-between;align-items:center;padding:15px 18px;display:flex}.panel-title h2{letter-spacing:0;font:12px Courier New,monospace}.panel-title span{color:var(--muted);font:10px Courier New,monospace}.move-list{height:150px;font:13px/1.8 Courier New,monospace;overflow:auto}.move-list:focus-visible{outline:2px solid var(--ink);outline-offset:-2px}#empty-history{color:var(--muted);text-align:center;padding-top:42px;font-size:11px}#moves{margin:0;padding:8px 0;list-style:none}#moves li{grid-template-columns:42px 1fr 1fr;padding:4px 18px;display:grid}#moves li:nth-child(2n){background:color-mix(in srgb, var(--ink) 5%, transparent)}#moves .move-number{color:var(--muted)}.latest-move{text-underline-offset:4px;font-weight:700;text-decoration:underline}.game-tools{border-top:1px solid var(--line);grid-template-columns:1fr 1fr;gap:3px;padding:7px;display:grid}.game-tools button{color:var(--ink);cursor:pointer;background:0 0;border:0;min-height:38px;padding:10px 5px;font:11px Courier New,monospace}.game-tools button:hover{background:color-mix(in srgb, var(--ink) 7%, transparent)}.game-tools button:disabled{opacity:.35;cursor:default}.model-note{color:var(--muted);margin:18px 0;font-size:11px;line-height:1.9}.model-note a{color:var(--ink);text-underline-offset:3px;margin-top:9px;text-decoration:underline;display:block}.promotion-panel{z-index:4;background:color-mix(in srgb, var(--paper) 96%, transparent);flex-direction:column;justify-content:center;align-items:center;gap:14px;font:14px Courier New,monospace;display:flex;position:absolute;inset:0}.promotion-panel>div{flex-wrap:wrap;justify-content:center;gap:8px;display:flex}.promotion-panel p{margin:0}.promotion-panel button{background:var(--paper);min-height:44px;color:var(--ink);border:1px solid var(--ink);cursor:pointer;text-transform:capitalize;padding:10px}.chess-game [hidden]{display:none!important}.chess-footer{border-top:1px solid var(--line);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:14px;margin-top:42px;padding-block:22px;font-size:10px;display:flex}@media (width<=850px){.chess-game{grid-template-columns:minmax(0,1fr) 280px;gap:22px}.setup-panel{padding:18px}}@media (width<=680px){.chess-nav,.chess-page{width:92%}.chess-owner{display:none}.chess-nav{padding-block:14px;font-size:10px}.chess-heading{padding-block:28px 18px}.chess-heading>p{font-size:11px}.chess-heading h1{font-size:44px}.chess-game{grid-template-columns:minmax(0,1fr);gap:20px}.game-sidebar{padding-top:0}.setup-panel{padding:20px}.board-frame{box-shadow:3px 3px 0 var(--line);border-width:3px}.player-strip{padding-block:10px}.chess-footer{margin-top:24px}#game-detail{min-height:0}}