:root{--color-board-dark: #8B4513;--color-board-light: #DEB887;--color-board-border: #5D3A1A;--color-bar: #654321;--color-point-dark: #2F1810;--color-point-light: #F5DEB3;--color-checker-white: #F5F5F5;--color-checker-white-border: #CCCCCC;--color-checker-black: #1A1A1A;--color-checker-black-border: #333333;--color-primary: #4A90D9;--color-primary-hover: #357ABD;--color-secondary: #6C757D;--color-secondary-hover: #545B62;--color-success: #28A745;--color-danger: #DC3545;--color-warning: #FFC107;--color-bg: #1A1A2E;--color-bg-light: #16213E;--color-text: #EAEAEA;--color-text-muted: #A0A0A0;--color-highlight: rgba(74, 144, 217, .6);--color-highlight-hit: rgba(220, 53, 69, .6);--color-selected: rgba(255, 193, 7, .8);--spacing-xs: .25rem;--spacing-sm: .5rem;--spacing-md: 1rem;--spacing-lg: 1.5rem;--spacing-xl: 2rem;--radius-sm: .375rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px rgba(0, 0, 0, .4);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .5);--transition-fast: .15s ease;--transition-normal: .25s ease;--transition-slow: .4s ease;--font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.25rem;--font-size-xl: 1.5rem}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:var(--font-family);background:var(--color-bg);color:var(--color-text);line-height:1.5;min-height:100vh;overflow-x:hidden}#app{display:flex;flex-direction:column;min-height:100vh;max-width:1200px;margin:0 auto;padding:var(--spacing-md)}.game-header{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md) var(--spacing-lg);background:var(--color-bg-light);border-radius:var(--radius-lg);margin-bottom:var(--spacing-lg);box-shadow:var(--shadow-md)}.game-header h1{font-size:var(--font-size-xl);font-weight:700;background:linear-gradient(135deg,var(--color-board-light),var(--color-primary));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.status-display{display:flex;align-items:center;gap:var(--spacing-md)}.turn-indicator{width:1.5rem;height:1.5rem;border-radius:var(--radius-full);border:2px solid var(--color-text);transition:background-color var(--transition-normal)}.turn-indicator.white{background-color:var(--color-checker-white)}.turn-indicator.black{background-color:var(--color-checker-black)}.game-status{font-size:var(--font-size-md);color:var(--color-text-muted)}.game-container{display:flex;gap:var(--spacing-lg);flex:1}.board-wrapper{flex:1;display:flex;justify-content:center;align-items:flex-start}#game-canvas{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);max-width:100%;height:auto;touch-action:none}.game-controls{display:flex;flex-direction:column;gap:var(--spacing-lg);min-width:180px;padding:var(--spacing-lg);background:var(--color-bg-light);border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}.dice-container{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-md)}.dice-display{display:flex;gap:var(--spacing-sm);min-height:60px;align-items:center;justify-content:center}.die{width:50px;height:50px;background:#fff;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;color:#333;box-shadow:var(--shadow-md);transition:transform var(--transition-fast),opacity var(--transition-normal)}.die.used{opacity:.4;transform:scale(.9)}.die.rolling{animation:diceRoll .3s ease-in-out infinite}@keyframes diceRoll{0%,to{transform:rotate(-5deg) scale(1)}50%{transform:rotate(5deg) scale(1.05)}}.btn{display:inline-flex;align-items:center;justify-content:center;padding:var(--spacing-sm) var(--spacing-lg);font-size:var(--font-size-md);font-weight:600;border:none;border-radius:var(--radius-lg);cursor:pointer;transition:all var(--transition-fast);text-transform:uppercase;letter-spacing:.05em}.btn:disabled{opacity:.5;cursor:not-allowed}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:var(--shadow-sm)}.btn-primary:hover:not(:disabled){background:var(--color-primary-hover);transform:translateY(-2px);box-shadow:var(--shadow-md)}.btn-primary:active:not(:disabled){transform:translateY(0)}.btn-secondary{background:var(--color-secondary);color:#fff}.btn-secondary:hover:not(:disabled){background:var(--color-secondary-hover)}.btn-outline{background:transparent;color:var(--color-text);border:2px solid var(--color-text-muted)}.btn-outline:hover:not(:disabled){border-color:var(--color-primary);color:var(--color-primary)}.btn-roll{width:100%;padding:var(--spacing-md);font-size:var(--font-size-lg)}.action-buttons{display:flex;flex-direction:column;gap:var(--spacing-sm)}.action-buttons .btn{width:100%}.moves-remaining{display:flex;justify-content:space-between;align-items:center;padding:var(--spacing-md);background:#ffffff0d;border-radius:var(--radius-md)}.moves-remaining .label{color:var(--color-text-muted);font-size:var(--font-size-sm)}.moves-remaining .count{font-size:var(--font-size-xl);font-weight:700;color:var(--color-primary)}.modal-container{position:fixed;inset:0;display:flex;align-items:center;justify-content:center;background:#000000b3;z-index:100;backdrop-filter:blur(4px)}.modal-container.hidden{display:none}.modal{background:var(--color-bg-light);border-radius:var(--radius-xl);padding:var(--spacing-xl);max-width:400px;width:90%;text-align:center;box-shadow:var(--shadow-lg);animation:modalIn .3s ease}@keyframes modalIn{0%{opacity:0;transform:scale(.9) translateY(-20px)}to{opacity:1;transform:scale(1) translateY(0)}}.modal h2{font-size:var(--font-size-xl);margin-bottom:var(--spacing-md)}.modal p{color:var(--color-text-muted);margin-bottom:var(--spacing-lg)}.modal-buttons{display:flex;gap:var(--spacing-md);justify-content:center}.victory-modal h2{font-size:2rem;background:linear-gradient(135deg,gold,orange);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.effects-container{position:fixed;inset:0;pointer-events:none;z-index:200}.effects-container canvas{width:100%;height:100%}.loading-screen{position:fixed;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;background:var(--color-bg);z-index:300}.loading-spinner{width:50px;height:50px;border:4px solid var(--color-bg-light);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.loading-text{margin-top:var(--spacing-md);color:var(--color-text-muted)}.noscript-message{max-width:400px;margin:4rem auto;padding:var(--spacing-xl);background:var(--color-bg-light);border-radius:var(--radius-lg);text-align:center}.noscript-message h2{color:var(--color-warning);margin-bottom:var(--spacing-md)}.hidden{display:none!important}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}@media (max-width: 768px){.game-container{flex-direction:column}.game-controls{flex-direction:row;flex-wrap:wrap;justify-content:center;min-width:100%}.dice-container{flex:1;min-width:150px}.action-buttons{flex-direction:row;flex:1}.moves-remaining{flex:0 0 100%}#game-canvas{max-height:50vh}}@media (max-width: 480px){:root{--spacing-md: .75rem;--spacing-lg: 1rem}.game-header{flex-direction:column;gap:var(--spacing-sm);text-align:center}.game-header h1{font-size:var(--font-size-lg)}.btn{padding:var(--spacing-sm) var(--spacing-md);font-size:var(--font-size-sm)}.die{width:40px;height:40px;font-size:1.25rem}}@keyframes shake{0%,to{transform:translate(0)}20%,60%{transform:translate(-5px)}40%,80%{transform:translate(5px)}}.shake{animation:shake .4s ease}@keyframes pulse{0%,to{opacity:.6}50%{opacity:1}}.pulse{animation:pulse 1s ease-in-out infinite}.invalid-move-text{position:absolute;top:50%;left:50%;transform:translate(-50%,-50%) scale(.8);background:var(--color-danger);color:#fff;padding:var(--spacing-sm) var(--spacing-lg);border-radius:var(--radius-lg);font-weight:600;font-size:var(--font-size-lg);opacity:0;pointer-events:none;transition:all var(--transition-normal);z-index:50;box-shadow:var(--shadow-lg)}.invalid-move-text.visible{opacity:1;transform:translate(-50%,-50%) scale(1)}.doubles-indicator{color:var(--color-warning);font-weight:700}.game-mode-modal .mode-buttons{display:flex;gap:var(--spacing-md);margin-top:var(--spacing-lg)}.btn-mode{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-lg);background:#ffffff0d;border:2px solid var(--color-text-muted);border-radius:var(--radius-lg);color:var(--color-text);cursor:pointer;transition:all var(--transition-normal);flex:1}.btn-mode:hover{border-color:var(--color-primary);background:#4a90d91a;transform:translateY(-2px)}.btn-mode .mode-icon{font-size:2rem}.btn-mode .mode-label{font-weight:600;font-size:var(--font-size-lg)}.btn-mode .mode-desc{font-size:var(--font-size-sm);color:var(--color-text-muted)}.ai-thinking{display:flex;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-sm) var(--spacing-md);background:#ffc10733;border-radius:var(--radius-md);color:var(--color-warning);font-weight:500}.ai-thinking:before{content:"";width:12px;height:12px;background:var(--color-warning);border-radius:50%;animation:aiPulse 1s ease-in-out infinite}@keyframes aiPulse{0%,to{opacity:.4;transform:scale(.8)}50%{opacity:1;transform:scale(1.2)}}.compatibility-warning{max-width:500px;margin:4rem auto;padding:var(--spacing-xl);background:var(--color-bg-light);border-radius:var(--radius-lg);text-align:center;box-shadow:var(--shadow-lg)}.compatibility-warning h2{color:var(--color-danger);margin-bottom:var(--spacing-md)}.compatibility-warning ul{list-style:none;margin:var(--spacing-md) 0}.compatibility-warning li{padding:var(--spacing-xs);background:#dc35451a;border-radius:var(--radius-sm);margin-bottom:var(--spacing-xs)}.confirm-modal .modal-buttons{display:flex;gap:var(--spacing-md);justify-content:center;margin-top:var(--spacing-lg)}.cube-container{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-sm);padding:var(--spacing-md);background:#ffffff0d;border-radius:var(--radius-md);transition:all var(--transition-normal)}.cube-display{width:60px;height:60px;background:linear-gradient(145deg,#1a1a2e,#16213e);border:3px solid var(--color-text-muted);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-md),inset 0 2px 4px #0000004d;transition:all var(--transition-normal)}.cube-value{font-size:1.75rem;font-weight:700;color:var(--color-text)}.cube-owner{font-size:var(--font-size-sm);color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.05em}.cube-container.cube-white .cube-display{border-color:var(--color-checker-white);box-shadow:var(--shadow-md),0 0 15px #f5f5f566}.cube-container.cube-black .cube-display{border-color:#666;box-shadow:var(--shadow-md),0 0 15px #64646466}.cube-container.cube-centered .cube-display{border-color:var(--color-primary)}.cube-container.cube-highlighted{background:#4a90d926}.cube-container.cube-highlighted .cube-display{border-color:var(--color-warning);box-shadow:var(--shadow-md),0 0 20px #ffc10780;animation:cubeGlow 1.5s ease-in-out infinite}@keyframes cubeGlow{0%,to{box-shadow:var(--shadow-md),0 0 15px #ffc10766}50%{box-shadow:var(--shadow-md),0 0 25px #ffc107b3}}.cube-container.flipping .cube-display{animation:cubeFlip .3s ease-in-out}@keyframes cubeFlip{0%{transform:rotateY(0)}50%{transform:rotateY(90deg)}to{transform:rotateY(0)}}.btn-warning{background:var(--color-warning);color:#1a1a2e;font-weight:700}.btn-warning:hover:not(:disabled){background:#e0a800;transform:translateY(-2px);box-shadow:var(--shadow-md)}#double-btn{width:100%}.double-modal h2{color:var(--color-warning)}.double-stakes{display:flex;align-items:center;justify-content:center;gap:var(--spacing-lg);margin:var(--spacing-lg) 0;padding:var(--spacing-md);background:#ffffff0d;border-radius:var(--radius-md)}.stake-info{display:flex;flex-direction:column;align-items:center;gap:var(--spacing-xs)}.stake-label{font-size:var(--font-size-sm);color:var(--color-text-muted)}.stake-value{font-size:2rem;font-weight:700;color:var(--color-text)}.stake-value.stake-new{color:var(--color-warning)}.stake-arrow{font-size:1.5rem;color:var(--color-text-muted)}.double-decision{font-weight:600;color:var(--color-text)!important}.double-modal .modal-buttons{display:flex;gap:var(--spacing-md);justify-content:center;margin-top:var(--spacing-lg)}.btn-success{background:var(--color-success);color:#fff}.btn-success:hover:not(:disabled){background:#218838}.btn-danger{background:var(--color-danger);color:#fff}.btn-danger:hover:not(:disabled){background:#c82333}@media (-webkit-min-device-pixel-ratio: 2),(min-resolution: 192dpi){#game-canvas{image-rendering:-webkit-optimize-contrast}}