:root{--color-bg:#e8e0d0;--color-panel:#f5f0e1;--color-ink:#3d2914;--color-ink-hover:#5a3d29;--color-muted:#666;--color-btn:#8b7355;--color-btn-hover:#a68a6b;--color-danger:#c0392b;--color-square-light:#f0d9b5;--color-square-dark:#b58863;--color-last-move:#ff69;--color-hover-move-light:#ffe082;--color-hover-move-dark:#ffd54f;--color-win-white:#2c5f2d;--color-win-black:#8b1a1a;--font-body:system-ui, -apple-system, sans-serif;--font-serif:Georgia, serif}*{box-sizing:border-box}body{font-family:var(--font-body);margin:0}h1{color:var(--color-ink);margin:0}.app-root{background-color:var(--color-bg);min-height:100vh;padding:20px}.app-center{justify-content:center;align-items:center;display:flex}.app-loading{color:var(--color-muted);font-size:1.1rem}.app-container{max-width:100%;margin:0 auto}.app-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:20px;display:flex}.app-header h1{font-size:2rem}.app-tagline{color:var(--color-muted);margin:4px 0 0}.header-actions{align-items:center;gap:12px;display:flex}.game-layout{flex-direction:column;gap:20px;display:flex}.board-wrapper{justify-content:center;display:flex}.btn{font-size:.9rem;font-weight:700;font-family:var(--font-body);background-color:var(--color-btn);color:var(--color-panel);cursor:pointer;border:none;border-radius:6px;padding:10px 20px;transition:background-color .2s}.btn:hover{background-color:var(--color-btn-hover)}.btn-danger{background-color:var(--color-danger);color:#fff}.btn-danger:hover{background-color:#a93226}.btn-primary{background-color:var(--color-ink);color:var(--color-panel)}.btn-primary:hover{background-color:var(--color-ink-hover)}.btn-icon{justify-content:center;align-items:center;padding:10px 16px;font-size:1.1rem;display:flex}.btn-start{border-radius:8px;width:100%;margin-top:8px;padding:16px 24px;font-size:1.1rem}.setup-panel{background-color:var(--color-panel);border:2px solid var(--color-ink);border-radius:12px;width:100%;max-width:500px;padding:32px;box-shadow:0 4px 12px #0000001a}.setup-header{text-align:center;margin-bottom:32px}.setup-header h1{font-size:2.5rem}.setup-header p{color:var(--color-muted);margin:8px 0 0}.setup-form{flex-direction:column;gap:20px;display:flex}.field-label{color:var(--color-ink);margin-bottom:8px;font-size:.9rem;font-weight:700;display:block}select{width:100%;font-size:1rem;font-family:var(--font-body);border:2px solid var(--color-ink);color:var(--color-ink);background-color:#fff;border-radius:6px;padding:12px 16px}.checkbox-label{cursor:pointer;color:var(--color-ink);align-items:center;gap:10px;font-size:1rem;display:flex}.checkbox-label input[type=checkbox]{width:20px;height:20px;accent-color:var(--color-ink);cursor:pointer}.modal-overlay{z-index:1000;background-color:#00000080;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-box{background-color:var(--color-panel);border:2px solid var(--color-ink);text-align:center;border-radius:12px;width:90%;padding:32px;box-shadow:0 8px 24px #0003}.modal-box h3{color:var(--color-ink);margin:0 0 16px;font-size:1.3rem}.modal-box p{color:#555;margin:0 0 24px;line-height:1.5}.modal-title-center{text-align:center;margin-bottom:24px!important}.modal-section{text-align:left;margin-bottom:20px}.modal-section .checkbox-label{gap:12px}.setting-hint{color:var(--color-muted);font-size:.85rem;margin:8px 0 0!important}.modal-actions{justify-content:center;gap:12px;display:flex;margin-bottom:0!important}.modal-actions-end{justify-content:flex-end}.game-status{background-color:var(--color-panel);border:2px solid var(--color-ink);font-family:var(--font-serif);border-radius:8px;min-height:60px;padding:12px 16px}.game-status-main{color:var(--color-ink);font-size:1.1rem;font-weight:700}.game-status-sub{color:var(--color-muted);margin-top:4px;font-size:.85rem}.game-winner{margin-top:8px;font-size:1.2rem;font-weight:700}.game-winner.draw{color:var(--color-muted)}.game-winner.white{color:var(--color-win-white)}.game-winner.black{color:var(--color-win-black)}.chess-board{box-sizing:content-box;border:8px solid var(--color-ink);background-color:var(--color-ink);-webkit-user-select:none;user-select:none;border-radius:4px;margin:0 auto;position:relative;box-shadow:0 4px 20px #0000004d}.chess-square{cursor:pointer;justify-content:center;align-items:center;transition:background-color .1s;display:flex;position:relative}.chess-square.light{background-color:var(--color-square-light)}.chess-square.dark{background-color:var(--color-square-dark)}.chess-square.last-move{background-color:var(--color-last-move)}.chess-square.hover-move.light{background-color:var(--color-hover-move-light)}.chess-square.hover-move.dark{background-color:var(--color-hover-move-dark)}.hover-move-indicator,.hover-capture-indicator{pointer-events:none;z-index:5;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}.hover-move-indicator{background-color:#ffc107b3;border-style:solid;border-color:#fbc02d;border-radius:50%}.hover-capture-indicator{background-color:#d8431526;border:3px solid #d84315;border-radius:4px}.rank-coordinate,.file-coordinate{color:#0006;pointer-events:none;-webkit-user-select:none;user-select:none;font-weight:700;position:absolute}.rank-coordinate{top:2px;left:4px}.file-coordinate{bottom:2px;right:4px}.chess-piece{-webkit-user-select:none;user-select:none;pointer-events:none;text-shadow:0 2px 4px #0006;color:#fff;filter:drop-shadow(0 2px 2px #00000080);line-height:1}.chess-piece-white{color:#fff;filter:drop-shadow(0 2px 2px #00000080)}.chess-piece-black{color:#1a1a1a;filter:drop-shadow(0 2px 2px #0000004d)}.chess-piece.animating{z-index:100;position:absolute;transform:translate(-50%,-50%)}.chess-piece.leader{border-style:solid;border-color:var(--color-ink);color:#1a1a1a;filter:drop-shadow(0 2px 2px #0000004d);background-color:#fff;border-radius:50%;justify-content:center;align-items:center;font-weight:700;display:flex;box-shadow:0 2px 6px #0006}.chess-square.dark .rank-coordinate,.chess-square.dark .file-coordinate{color:#fff6}.move-history{max-height:300px;overflow-y:auto}.move-history-table{border-collapse:collapse;width:100%;font-size:.85rem}.move-history-table td{padding:2px 8px}.move-number{text-align:right;width:30px;color:var(--color-muted)}.captured-pieces{flex-direction:column;gap:8px;display:flex}.captured-group h4{margin:0}.captured-list{flex-wrap:wrap;gap:4px;display:flex}.captured-entry{align-items:center;gap:4px;margin:2px;display:flex}.captured-count{font-size:.8rem;font-weight:700}.btn-small{padding:4px 10px;font-size:.75rem}.debug-panel{background-color:var(--color-panel);border:2px solid var(--color-ink);border-radius:8px;width:100%;overflow:hidden}.debug-panel-header{background-color:var(--color-ink);color:var(--color-panel);justify-content:space-between;align-items:center;padding:8px 12px;font-size:.85rem;font-weight:700;display:flex}.debug-panel-json{text-align:left;max-height:300px;color:var(--color-ink);white-space:pre;margin:0;padding:12px;font-family:Courier New,Courier,monospace;font-size:.75rem;line-height:1.4;overflow:auto}