#chessBoardWrap{width:fit-content;margin:6px auto}.chess-board-grid{grid-template-columns:20px repeat(8, var(--chess-cell,44px));grid-template-rows:18px repeat(8, var(--chess-cell,44px));background:#2a3348;border-radius:6px;gap:1px;padding:4px;display:grid;box-shadow:0 0 20px #00000080}.chess-coord{color:#8a9ab8;-webkit-user-select:none;user-select:none;pointer-events:none;justify-content:center;align-items:center;font-size:.68em;display:flex}.chess-coord-corner{background:0 0}.chess-coord-file,.chess-coord-rank{font-weight:600}.chess-cell{cursor:pointer;touch-action:manipulation;border:none;justify-content:center;align-items:center;padding:0;display:flex;position:relative}.chess-cell.light{background:#e8edf5}.chess-cell.dark{background:#7a8aa8}.chess-cell.selected{box-shadow:inset 0 0 0 3px var(--gt-gold)}.chess-cell.target:after{content:"";background:#508cdc8c;border-radius:50%;width:28%;height:28%;position:absolute}.chess-cell.ai-last-from{background:#b8d898!important}.chess-cell.ai-last-to{animation:.7s ease-out aiMovePulse;background:#88c858!important}.chess-cell.ai-move-capture.ai-last-to{box-shadow:inset 0 0 0 3px #ff9800}.chess-cell.king-in-check{animation:1s ease-in-out infinite chessKingCheckPulse;box-shadow:inset 0 0 0 3px #e53935}@keyframes chessKingCheckPulse{0%,to{box-shadow:inset 0 0 0 3px #e53935}50%{box-shadow:inset 0 0 0 3px #ff5252,0 0 10px #e539358c}}.chess-cell.rejected{animation:.45s ease-out chessRejectPulse;box-shadow:inset 0 0 0 3px #e53935}@keyframes chessRejectPulse{0%{box-shadow:inset 0 0 0 3px #ff5252;background:#ffcdd2!important}to{box-shadow:inset 0 0 0 3px #e53935}}.chess-piece{-webkit-user-select:none;user-select:none;pointer-events:none;font-size:clamp(1.4em,6vw,2.2em);line-height:1}.chess-piece.white{color:#fff;text-shadow:0 1px 2px #000000d9,0 0 1px #000}.chess-piece.black{color:#1a1208;text-shadow:0 1px #ffffff40}.chess-message{min-height:1.4em;color:var(--gt-gold);text-align:center;margin-top:6px;font-size:1em;font-weight:700}.chess-message.error{color:#ff8a80}.chess-message.terminal{color:#ffcc80;font-size:1.05em}.chess-ai-move{color:var(--gt-text-muted);text-align:center;max-width:360px;font-size:.85em;line-height:1.45}#chessInfo{flex-direction:column;align-items:center;gap:4px;margin-bottom:4px;font-size:.95em;display:flex}.chess-promo-modal{text-align:center;background:var(--gt-surface);border:1px solid var(--gt-border);border-radius:8px;max-width:360px;margin:8px auto;padding:8px}.chess-promo-label{color:var(--gt-text-muted);margin-bottom:8px;font-size:.88em}.chess-promo-btns{flex-wrap:wrap;justify-content:center;gap:6px;display:flex}.chess-promo-btn{border:2px solid var(--gt-border);background:var(--gt-surface);color:var(--gt-text);cursor:pointer;border-radius:6px;padding:6px 14px;font-size:1em}.chess-promo-btn:hover{border-color:var(--gt-gold);color:var(--gt-gold)}.chess-difficulty-row{justify-content:center;gap:4px;margin-bottom:6px;display:flex}.chess-diff-btn{border:1px solid var(--gt-border);color:var(--gt-text-muted);cursor:pointer;background:0 0;border-radius:4px;padding:3px 10px;font-size:.8em}.chess-diff-btn.active{border-color:var(--gt-gold);color:var(--gt-gold);font-weight:700}