.page-header[data-astro-cid-es2qdrb6]{margin-bottom:var(--space-xl)}.page-header[data-astro-cid-es2qdrb6] h1[data-astro-cid-es2qdrb6]{margin-top:var(--space-sm);font-size:1.75rem;font-weight:700;letter-spacing:-.02em;background:linear-gradient(135deg,#f4c430,#fff4c4,#c9a227);background-clip:text;-webkit-background-clip:text;-webkit-text-fill-color:transparent}.page-header__desc[data-astro-cid-es2qdrb6]{color:var(--color-text-secondary);font-size:1.05rem}.back-link[data-astro-cid-es2qdrb6]{font-size:.85rem;color:var(--color-text-muted);text-decoration:none}.back-link[data-astro-cid-es2qdrb6]:hover{color:var(--color-text);text-decoration:none}.chess-app{--board-light: #e8dab2;--board-dark: #b58863;--board-selected: rgba(244, 196, 48, .55);--board-last-move: rgba(244, 196, 48, .3);--board-check: rgba(255, 50, 50, .6);--board-suggested-from: rgba(100, 200, 255, .45);--board-suggested-to: rgba(100, 200, 255, .55);--dot-color: rgba(0, 0, 0, .25);--capture-ring: rgba(0, 0, 0, .25);--accent-gold: #f4c430;--accent-gold-dim: #c9a227;--accent-green: #6bcb77;--accent-red: #ff6b6b;--accent-blue: #4da6ff;--bg-panel: rgba(18, 18, 42, .6);--bg-panel-hover: rgba(26, 26, 58, .8);--border-subtle-chess: rgba(255, 255, 255, .06);--border-glow: rgba(244, 196, 48, .15);--shadow-lg-chess: 0 8px 32px rgba(0, 0, 0, .6);--shadow-glow: 0 0 20px rgba(244, 196, 48, .1);--board-size: min(75vh, 560px);--border-radius-chess: 12px}.chess-app .app-container{display:flex;justify-content:center;align-items:flex-start;gap:24px;padding:0;max-width:1100px;margin:0 auto}.chess-app .board-area{display:flex;align-items:stretch;gap:16px;flex-shrink:0}.chess-app .eval-bar-container{width:24px;background:#333;border-radius:4px;overflow:hidden;position:relative;display:flex;flex-direction:column;box-shadow:inset 0 2px 8px #00000080;border:1px solid var(--border-subtle-chess)}.chess-app .eval-fill{width:100%;height:50%;background:#fff;transition:height .5s cubic-bezier(.25,.1,.25,1);position:absolute;bottom:0}.chess-app .eval-score{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);font-size:.65rem;font-weight:700;color:#888;z-index:2;mix-blend-mode:difference;pointer-events:none}.chess-app .board-wrapper{flex-shrink:0}.chess-app .chess-board{display:grid;grid-template-columns:repeat(8,1fr);grid-template-rows:repeat(8,1fr);width:var(--board-size);height:var(--board-size);border-radius:6px;overflow:hidden;box-shadow:var(--shadow-lg-chess),var(--shadow-glow);border:2px solid var(--border-glow);user-select:none}.chess-app .square{position:relative;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:background-color .1s ease}.chess-app .square.light{background-color:var(--board-light)}.chess-app .square.dark{background-color:var(--board-dark)}.chess-app .square.selected{background-color:var(--board-selected)!important}.chess-app .square.last-move.light{background-color:#f4c43059}.chess-app .square.last-move.dark{background-color:#f4c43066}.chess-app .square.check{background:radial-gradient(ellipse at center,rgba(255,0,0,.7) 0%,rgba(255,0,0,.3) 40%,transparent 70%)!important}.chess-app .square.suggested-from{background-color:var(--board-suggested-from)!important}.chess-app .square.suggested-to{background-color:var(--board-suggested-to)!important}.chess-app .coord{position:absolute;font-size:.65rem;font-weight:600;pointer-events:none;z-index:2;opacity:.7}.chess-app .rank-label{top:2px;left:3px}.chess-app .file-label{bottom:1px;right:3px}.chess-app .square.light .coord{color:var(--board-dark)}.chess-app .square.dark .coord{color:var(--board-light)}.chess-app .piece{position:absolute;inset:4%;display:flex;align-items:center;justify-content:center;z-index:3;pointer-events:none;transition:opacity .1s}.chess-app .piece-svg{width:100%;height:100%;filter:drop-shadow(0 1px 2px rgba(0,0,0,.3))}.chess-app .move-indicator{position:absolute;width:28%;height:28%;border-radius:50%;background:var(--dot-color);z-index:4;pointer-events:none;top:50%;left:50%;transform:translate(-50%,-50%)}.chess-app .capture-indicator{position:absolute;inset:4%;border-radius:50%;border:3px solid var(--capture-ring);z-index:4;pointer-events:none}.drag-piece{position:fixed;z-index:1000;pointer-events:none;filter:drop-shadow(0 4px 12px rgba(0,0,0,.5));transform:scale(1.1)}.drag-piece .piece-svg{width:100%;height:100%}.chess-app .side-panel{width:280px;display:flex;flex-direction:column;gap:12px;flex-shrink:0}.chess-app .panel-card{background:var(--bg-panel);border:1px solid var(--border-subtle-chess);border-radius:var(--border-radius-chess);padding:16px;box-shadow:var(--shadow-lg-chess);backdrop-filter:blur(8px)}.chess-app .panel-card-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.chess-app .panel-title{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.08em;color:var(--color-text-secondary, #8888a8)}.chess-app .status-card{background:linear-gradient(135deg,var(--bg-panel),rgba(244,196,48,.05));border-color:var(--border-glow)}.chess-app .status-display{display:flex;align-items:center;gap:10px}.chess-app .status-icon{font-size:1.5rem;line-height:1;min-width:28px;text-align:center}.chess-app .status-icon.check{animation:chess-pulse-warning 1s infinite}.chess-app .status-icon.checkmate{animation:chess-bounce-in .5s ease}.chess-app #game-status{font-size:.95rem;font-weight:500}.chess-app .status-meta{display:flex;gap:12px;margin-top:10px;padding-top:10px;border-top:1px solid var(--border-subtle-chess)}.chess-app .meta-item{font-size:.72rem;color:var(--color-text-muted, #55557a)}.chess-app .meta-value{color:var(--color-text-secondary, #8888a8);font-weight:600}.chess-app .move-list-container{max-height:250px;overflow-y:auto;scrollbar-width:thin;scrollbar-color:var(--color-text-muted, #55557a) transparent}.chess-app .move-list-container::-webkit-scrollbar{width:4px}.chess-app .move-list-container::-webkit-scrollbar-thumb{background:var(--color-text-muted, #55557a);border-radius:2px}.chess-app .move-row{display:grid;grid-template-columns:32px 1fr 1fr;gap:4px;padding:3px 6px;border-radius:4px;font-size:.82rem;font-family:Inter,monospace;transition:background .15s}.chess-app .move-row:hover{background:var(--bg-panel-hover)}.chess-app .move-row.latest{background:#f4c43014}.chess-app .move-number{color:var(--color-text-muted, #55557a);font-weight:500}.chess-app .move-notation{font-weight:500}.chess-app .move-notation.black-move{color:var(--color-text-secondary, #8888a8)}.chess-app .empty-moves{text-align:center;color:var(--color-text-muted, #55557a);font-size:.8rem;padding:16px 0;font-style:italic}.chess-app .captured-section{display:flex;flex-direction:column;gap:8px}.chess-app .captured-row{display:flex;align-items:center;gap:6px;min-height:24px}.chess-app .captured-label{font-size:.7rem;color:var(--color-text-muted, #55557a);width:18px;flex-shrink:0;text-align:center;font-weight:600}.chess-app .captured-pieces{display:flex;flex-wrap:wrap;gap:2px;align-items:center}.chess-app .captured-piece{display:inline-flex;width:22px;height:22px}.chess-app .captured-piece .piece-svg{width:100%;height:100%;filter:drop-shadow(0 1px 1px rgba(0,0,0,.4))}.chess-app .no-captures{color:var(--color-text-muted, #55557a);font-size:.8rem}.chess-app .material-advantage{text-align:center;font-size:.75rem;font-weight:600;padding:4px 8px;border-radius:4px;margin-top:4px}.chess-app .material-advantage.white-advantage{background:#ffffff14;color:#ddd}.chess-app .material-advantage.black-advantage{background:#1a1a2e66;color:var(--color-text-secondary, #8888a8)}.chess-app .material-advantage.even{color:var(--color-text-muted, #55557a)}.chess-app .engine-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.chess-app .engine-status{font-size:.7rem;padding:2px 8px;border-radius:10px;background:#ffffff0d;color:var(--color-text-muted, #55557a);transition:all .3s}.chess-app .engine-status.engine-ready{background:#6bcb7726;color:var(--accent-green)}.chess-app .engine-status.engine-fallback{background:#ff6b6b26;color:var(--accent-red)}.chess-app .form-group{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:8px;font-size:.8rem;color:var(--color-text-secondary, #8888a8)}.chess-app .custom-select{flex:1;max-width:170px;padding:5px 8px;background:var(--bg-panel-hover);border:1px solid var(--border-subtle-chess);border-radius:6px;color:var(--color-text, #e8e8f0);font-family:inherit;font-size:.8rem;cursor:pointer;outline:none;transition:border-color .2s}.chess-app .custom-select:hover,.chess-app .custom-select:focus{border-color:var(--accent-gold-dim)}.chess-app .custom-select option{background:var(--bg-panel);color:var(--color-text, #e8e8f0)}.chess-app .actions-card{display:flex;flex-direction:column;gap:8px}.chess-app .btn{display:flex;align-items:center;justify-content:center;gap:6px;padding:10px 16px;border:1px solid var(--border-subtle-chess);border-radius:8px;background:var(--bg-panel-hover);color:var(--color-text, #e8e8f0);font-family:inherit;font-size:.85rem;font-weight:500;cursor:pointer;transition:all .2s ease;width:100%}.chess-app .btn:hover:not(:disabled){background:#ffffff14;border-color:#ffffff1f;transform:translateY(-1px)}.chess-app .btn:active:not(:disabled){transform:translateY(0)}.chess-app .btn:disabled{opacity:.4;cursor:not-allowed}.chess-app .btn-primary{background:linear-gradient(135deg,var(--accent-gold-dim),var(--accent-gold));border-color:var(--accent-gold);color:#1a1a2e;font-weight:600}.chess-app .btn-primary:hover:not(:disabled){background:linear-gradient(135deg,var(--accent-gold),#ffe066);box-shadow:0 2px 12px #f4c4304d}.chess-app .btn-primary.thinking{opacity:.7;pointer-events:none}.chess-app .spinner{display:inline-block;width:14px;height:14px;border:2px solid transparent;border-top-color:#1a1a2e;border-radius:50%;animation:chess-spin .6s linear infinite}.promotion-overlay{position:fixed;inset:0;background:#000000b3;backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;z-index:500}.promotion-dialog{background:var(--bg-panel, rgba(18, 18, 42, .95));border:1px solid var(--border-glow, rgba(244, 196, 48, .15));border-radius:12px;padding:20px;box-shadow:0 8px 32px #0009,0 0 40px #f4c4301a;animation:chess-dialog-in .2s ease}.promotion-title{text-align:center;font-size:.85rem;font-weight:600;color:var(--color-text-secondary, #8888a8);margin-bottom:12px;text-transform:uppercase;letter-spacing:.06em}.promotion-options{display:flex;gap:8px}.promotion-btn{width:60px;height:60px;background:var(--bg-panel-hover, rgba(26, 26, 58, .8));border:2px solid var(--border-subtle-chess, rgba(255, 255, 255, .06));border-radius:8px;cursor:pointer;padding:8px;transition:all .2s ease}.promotion-btn:hover{border-color:var(--accent-gold, #f4c430);background:#f4c4301a;transform:scale(1.08)}.promotion-btn .piece-svg{width:100%;height:100%}@keyframes chess-pulse-warning{0%,to{opacity:1}50%{opacity:.5}}@keyframes chess-bounce-in{0%{transform:scale(.5);opacity:0}60%{transform:scale(1.2)}to{transform:scale(1);opacity:1}}@keyframes chess-spin{to{transform:rotate(360deg)}}@keyframes chess-dialog-in{0%{transform:scale(.9);opacity:0}to{transform:scale(1);opacity:1}}@media(max-width:860px){.chess-app{--board-size: min(85vw, 480px)}.chess-app .app-container{flex-direction:column;align-items:center;padding:0}.chess-app .side-panel{width:100%;max-width:480px}}@media(max-width:480px){.chess-app{--board-size: 95vw}.chess-app .side-panel{max-width:95vw}}