:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light dark;color:#ffffffde;background-color:#242424;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{font-weight:500;color:#646cff;text-decoration:inherit}a:hover{color:#535bf2}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}h1{font-size:3.2em;line-height:1.1}button{border-radius:8px;border:1px solid transparent;padding:.6em 1.2em;font-size:1em;font-weight:500;font-family:inherit;background-color:#1a1a1a;cursor:pointer;transition:border-color .25s}button:hover{border-color:#646cff}button:focus,button:focus-visible{outline:4px auto -webkit-focus-ring-color}@media (prefers-color-scheme: light){:root{color:#213547;background-color:#fff}a:hover{color:#747bff}button{background-color:#f9f9f9}}#root{max-width:1280px;margin:0 auto;padding:2rem;text-align:center}.logo{height:6em;padding:1.5em;will-change:filter;transition:filter .3s}.logo:hover{filter:drop-shadow(0 0 2em #646cffaa)}.logo.react:hover{filter:drop-shadow(0 0 2em #61dafbaa)}@keyframes logo-spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}@media (prefers-reduced-motion: no-preference){a:nth-of-type(2) .logo{animation:logo-spin infinite 20s linear}}.card{padding:2em}.read-the-docs{color:#888}.chess-board{display:flex;flex-direction:column;align-items:center;padding:20px}.board{border:2px solid var(--border-color);padding:0;margin-top:20px;background-color:var(--board-color);position:relative;width:540px;height:600px;box-sizing:border-box;box-shadow:0 5px 15px #00000080}.board:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background-image:linear-gradient(var(--square-border-color) 1px,transparent 1px),linear-gradient(90deg,var(--square-border-color) 1px,transparent 1px);background-size:60px 60px,60px 60px;background-position:0 0,0 0;pointer-events:none}.board:after{content:"";position:absolute;width:100%;height:100%;top:0;left:0;background-image:none;pointer-events:none;z-index:1}.board-text{position:absolute;font-size:24px;font-weight:700;width:100%;text-align:center;top:50%;transform:translateY(-50%);color:var(--border-color);pointer-events:none;z-index:2}.board-row{display:flex}.square{width:60px;height:60px;position:absolute;box-sizing:border-box;cursor:pointer}.square.selected{background-color:#ffff004d}.square.valid-move:before{content:"";position:absolute;width:16px;height:16px;background-color:#00ff00e6;border-radius:50%;z-index:100;left:50%;top:50%;transform:translate(-50%,-50%);box-shadow:0 0 8px 2px #00ff00b3;pointer-events:none}.piece{width:50px;height:50px;border-radius:50%;display:flex;justify-content:center;align-items:center;font-size:20px;cursor:pointer;transition:transform .2s;position:absolute;z-index:5;left:30px;top:30px;transform:translate(-50%,-50%);box-shadow:0 2px 5px #0000004d}.piece:hover{transform:translate(-50%,-50%) scale(1.1)}.controls{display:flex;gap:1rem;margin-bottom:1rem;flex-wrap:wrap;justify-content:center}.controls select,.controls button{padding:.8rem 1.5rem;font-size:1rem;border:2px solid #4CAF50;border-radius:5px;background-color:#fff;color:#4caf50;cursor:pointer;transition:all .3s ease}.controls select:hover,.controls button:hover{background-color:#4caf50;color:#fff}.game-info{margin-top:1rem;text-align:center;font-size:1.1rem;color:#333}.game-info p{margin:.5rem 0;padding:.5rem;border-radius:4px;transition:background-color .3s ease}.game-info p.current-turn{background-color:#4caf5033;font-weight:700;animation:pulse 2s infinite}.game-info p.red-turn{color:#ff4d4d}.game-info p.black-turn{color:#333}@keyframes pulse{0%{box-shadow:0 0 #4caf5066}70%{box-shadow:0 0 0 10px #4caf5000}to{box-shadow:0 0 #4caf5000}}.custom-mode{margin-top:1rem;text-align:center}.preset-layouts{display:flex;gap:1rem;margin-top:1rem;flex-wrap:wrap;justify-content:center}.preset-layout{padding:.8rem 1.5rem;font-size:1rem;border:2px solid #4CAF50;border-radius:5px;background-color:#fff;color:#4caf50;cursor:pointer;transition:all .3s ease}.preset-layout:hover{background-color:#4caf50;color:#fff}.piece.unflipped{background-color:#8b4513;color:transparent;border:2px solid #5c2d0c}.blind-phase-alert{background-color:#fff3cd;color:#856404;padding:.75rem 1.25rem;border:1px solid #ffeeba;border-radius:.25rem;margin-bottom:1rem;text-align:center;width:100%}.check-alert{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background-color:#dc3545e6;color:#fff;padding:1rem 2rem;border-radius:5px;font-size:1.5rem;animation:fadeInOut 2s ease-in-out;z-index:1000;box-shadow:0 0 20px #0000004d}@keyframes fadeInOut{0%{opacity:0;transform:translate(-50%,-50%) scale(.8)}15%{opacity:1;transform:translate(-50%,-50%) scale(1.1)}25%{transform:translate(-50%,-50%) scale(1)}85%{opacity:1}to{opacity:0}}.piece.red{background-color:var(--red-piece-color, #ff4d4d);color:var(--text-color, white);border:2px solid var(--red-piece-border, #cc0000)}.piece.black{background-color:var(--black-piece-color, #333);color:var(--text-color, white);border:2px solid var(--black-piece-border, #000)}button{padding:10px 20px;font-size:16px;background-color:#4caf50;color:#fff;border:none;border-radius:5px;cursor:pointer;margin-bottom:20px}button:hover{background-color:#45a049}.undo-button{background-color:#f0ad4e;border-color:#eea236;color:#fff}.undo-button:disabled{background-color:#ccc;border-color:#bbb;cursor:not-allowed}.undo-button:hover:not(:disabled){background-color:#ec971f;border-color:#d58512}.piece.in-check{animation:check-pulse 1s infinite;box-shadow:0 0 10px red}@keyframes check-pulse{0%{box-shadow:0 0 5px red}50%{box-shadow:0 0 20px red}to{box-shadow:0 0 5px red}}.piece.in-check:not(.was-in-check){animation:check-sound .1s}@keyframes check-sound{0%{transform:scale(1)}to{transform:scale(1)}}.square.soldier-point:before{display:none;content:"";position:absolute;width:8px;height:8px;background-color:var(--square-border-color);border-radius:50%;top:50%;left:50%;transform:translate(-50%,-50%)}.river-border{position:absolute;height:2px;width:100%;background-color:var(--border-color);top:50%;transform:translateY(-50%);opacity:.3;z-index:1}.start-screen{display:flex;flex-direction:column;align-items:center;padding:3rem;max-width:1200px;margin:0 auto;background-color:#f5f5f5;border-radius:10px;box-shadow:0 0 10px #0000001a}.start-screen h1{font-size:2.5rem;color:#333;margin-bottom:2rem}.mode-selection,.theme-selection{width:100%;max-width:600px;margin-bottom:3rem}.mode-selection h2,.theme-selection h2{font-size:1.5rem;color:#444;margin-bottom:1rem;text-align:center}.mode-buttons{display:flex;justify-content:space-around;gap:4rem;flex-wrap:wrap;margin-top:2rem;width:100%;padding:0 2rem}button{padding:.8rem 1.5rem;font-size:1rem;border:2px solid #4CAF50;border-radius:5px;background-color:#fff;color:#4caf50;cursor:pointer;transition:all .3s ease}button:hover,button.selected{background-color:#4caf50;color:#fff}.theme-select{width:100%;max-width:400px;padding:1rem;font-size:1.1rem;border:2px solid #4CAF50;border-radius:5px;background-color:#fff;color:#444;cursor:pointer;margin:0 auto;display:block}.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background-color:#00000080;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:#fff;padding:2rem;border-radius:10px;max-width:600px;width:90%;max-height:80vh;overflow-y:auto;position:relative;box-shadow:0 4px 6px #0000001a}.modal-content h2{font-size:1.5rem;color:#444;margin-bottom:1.5rem;text-align:center}.modal-content ul{padding-left:1.5rem;margin-bottom:1rem}.modal-content li{margin-bottom:.8rem;color:#666;line-height:1.4}.close-button{position:absolute;top:1rem;right:1rem;padding:.5rem 1rem;font-size:.9rem;background-color:#f44336;color:#fff;border:none;border-radius:5px;cursor:pointer;transition:background-color .3s ease}.close-button:hover{background-color:#d32f2f}.button-group{display:flex;flex-direction:column;gap:1.5rem;align-items:center;margin-top:2rem;width:100%;max-width:300px}.button-group button{width:100%;font-size:1.2rem;padding:1rem 2rem;background-color:#4caf50;color:#fff;border:none;border-radius:5px;cursor:pointer;transition:background-color .3s ease}.button-group button:hover{background-color:#45a049}