.custom-board-wrapper{position:relative;width:100%;height:100%;max-width:100%;aspect-ratio:1;-webkit-user-select:none;-moz-user-select:none;user-select:none}.custom-board{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);width:100%;height:100%;min-width:0;border-radius:4px;overflow:hidden;box-shadow:0 5px 15px #00000080;position:relative}.square{position:relative;width:100%;height:100%;display:flex;justify-content:center;align-items:center}.square.light{background-color:#f0d9b5}.square.dark{background-color:#b58863}.square.selected{background-color:#ffff0080!important}.piece{width:90%;height:90%;cursor:grab;z-index:2;transition:transform .1s}.piece:active{cursor:grabbing}.move-marker{width:30%;height:30%;background-color:#0003;border-radius:50%;z-index:1}.square.possible-move.dark .move-marker{background-color:#0000004d}.square.possible-move:has(.piece):after{content:"";position:absolute;width:90%;height:90%;border-radius:50%;border:4px solid rgba(0,0,0,.2);box-sizing:border-box}.rank-label{position:absolute;top:2px;left:2px;font-size:10px;font-weight:700;color:inherit;opacity:.8}.file-label{position:absolute;bottom:2px;right:2px;font-size:10px;font-weight:700;color:inherit;opacity:.8}.square.light .rank-label,.square.light .file-label{color:#779556}.square.dark .rank-label,.square.dark .file-label{color:#ebecd0}.game-over-overlay{position:absolute;top:0;left:0;width:100%;height:100%;background:#000000b3;display:flex;flex-direction:column;justify-content:center;align-items:center;color:#fff;z-index:10}.square.hint-square{box-shadow:inset 0 0 0 3px #ffd700cc;animation:pulse-hint 1s ease-in-out infinite}@keyframes pulse-hint{0%,to{box-shadow:inset 0 0 0 3px #ffd700cc}50%{box-shadow:inset 0 0 0 3px gold}}.best-move-arrow-svg{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:10}.square.premove-square{background-color:#ff8c008c!important}