:root{font-family: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{--bg-color: #f8f8f8;--right-bg-color: #f5f5f5;--text-color: #333;--section-bg: white;--border-color: #ddd;--button-bg: #e0e0e0;--button-hover: #d0d0d0;--button-primary: #4a90e2;--button-danger: #ff6b6b}[data-theme=dark]{--bg-color: #1a1a1a;--right-bg-color: #222;--text-color: #f0f0f0;--section-bg: #2d2d2d;--border-color: #444;--button-bg: #333;--button-hover: #444;--button-primary: #2a5885;--button-danger: #d14545}#root{max-width:100vw;margin:0;padding:0;min-height:100vh;box-sizing:border-box;overflow-x:hidden;background-color:var(--bg-color);color:var(--text-color);font-family:Marcellus,serif}.app-container{display:flex;width:100vw;height:100vh}.left-column{width:50vw;height:100vh;display:flex;justify-content:center;align-items:center;background-color:var(--bg-color)}.right-column{width:50vw;height:100vh;padding:2rem;background-color:var(--right-bg-color);box-sizing:border-box;overflow-y:auto}@media (max-width: 768px){.right-column{width:100vw;height:auto;min-height:50vh;padding:1.5rem;overflow-y:visible}.game-info-container{overflow-y:visible;height:auto}}.theme-toggle{position:absolute;top:1rem;right:3rem;padding:.5rem;background:var(--button-bg);border:none;border-radius:4px;cursor:pointer;color:var(--text-color);z-index:100}.chess-board-container{display:flex;flex-direction:column;width:fit-content;position:relative}.chess-board-and-row-labels{display:flex}.chess-board{display:flex;flex-direction:column;border:2px solid #333;box-shadow:0 0 20px #00000080;width:90vmin;height:90vmin;max-width:800px;max-height:800px}.row{display:flex;flex:1}.square{flex:1;display:flex;justify-content:center;align-items:center;position:relative}.square:after{content:"";display:block;padding-bottom:100%}.piece{font-size:6.75vmin;position:absolute;line-height:1;-webkit-user-select:none;user-select:none}.light{background-color:#f0d9b5}.dark{background-color:#b58863}.piece.black{color:#000}.piece.white{color:#fff;text-shadow:1px 1px 2px rgba(0,0,0,.7)}.square.selected{background-color:#ffff00b3;box-shadow:inset 0 0 3px 2px #00000080}.column-labels{background-color:#b58863;display:flex;flex-direction:row;justify-content:space-around}.row-labels{background-color:#b58863;display:flex;flex-direction:column;justify-content:space-around;padding:5px}.notation-label{color:#5a3921;font-weight:700;font-size:1.6875vmin;font-family:Arial,sans-serif;-webkit-user-select:none;user-select:none}.promotion-modal{position:absolute;inset:0;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:100}.promotion-options{background-color:#f0d9b5;padding:20px;border-radius:10px;text-align:center}.promotion-options h3{margin-top:0;color:#5a3921}.promotion-options button{display:block;width:100%;padding:10px;margin:5px 0;background-color:#b58863;color:#fff;border:none;border-radius:5px;cursor:pointer;font-size:16px}.promotion-options button:hover{background-color:#8c6e56}@media (max-width: 600px){.chess-board{width:95vmin;height:95vmin}.piece{font-size:7.125vmin}.column-labels{padding-left:9.5vmin}.notation-label{font-size:1.78125vmin}}:root{--bg-primary: #f8f8f8;--bg-secondary: #f5f5f5;--text-primary: #333;--text-secondary: #666;--border-color: #ddd;--button-bg: #e0e0e0;--button-bg-hover: #d0d0d0;--button-bg-disabled: #f0f0f0;--button-text: #333;--button-text-disabled: #999;--success: #4caf50;--success-hover: #45a049;--danger: #ff6b6b;--danger-hover: #e05e5e;--primary: #4a90e2;--primary-hover: #3a80d2;--mode-button-active: #4caf50;--mode-button-hover: #e8f5e8;--color-button-white-bg: #f0f0f0;--color-button-white-text: #333;--color-button-black-bg: #333;--color-button-black-text: #fff;--color-button-active-border: #4a90e2;--section-shadow: 0 2px 8px rgba(0, 0, 0, .08);--card-radius: 12px;--transition: all .2s ease}[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #222;--text-primary: #f0f0f0;--text-secondary: #ccc;--border-color: #444;--button-bg: #333;--button-bg-hover: #444;--button-bg-disabled: #2a2a2a;--button-text: #f0f0f0;--button-text-disabled: #777;--success: #2e7d32;--success-hover: #276a2a;--danger: #d14545;--danger-hover: #b33c3c;--primary: #2a5885;--primary-hover: #234a72;--mode-button-active: #2e7d32;--mode-button-hover: #2a2a2a;--color-button-white-bg: #444;--color-button-white-text: #f0f0f0;--color-button-black-bg: #111;--color-button-black-text: #f0f0f0;--color-button-active-border: #4a90e2;--section-shadow: 0 2px 8px rgba(0, 0, 0, .2)}.game-info-container{background-color:var(--bg-secondary);border-radius:var(--card-radius);padding:24px;height:100%;display:flex;flex-direction:column;box-shadow:var(--section-shadow);gap:20px}.game-info-title{text-align:center;margin:0;color:var(--text-primary);font-size:1.8rem;font-weight:700;padding-bottom:16px;border-bottom:2px solid var(--border-color);flex-shrink:0}.game-info-content{display:contents}.game-info-section{background-color:var(--bg-primary);padding:20px;border-radius:var(--card-radius);border:1px solid var(--border-color);box-shadow:var(--section-shadow);transition:var(--transition);flex-shrink:0}.game-info-section h3{margin:0 0 16px;color:var(--text-primary);font-size:1.2rem;font-weight:600;display:flex;align-items:center;gap:8px}.game-info-section h4{margin:0 0 12px;color:var(--text-primary);font-size:1rem;font-weight:500}.game-info-section p{margin:8px 0;color:var(--text-secondary);line-height:1.5}.game-info-button{background-color:var(--button-bg);color:var(--button-text);border:none;border-radius:6px;padding:12px 16px;margin:4px;cursor:pointer;transition:var(--transition);font-size:.9rem;font-weight:500;display:flex;align-items:center;justify-content:center;gap:8px}.game-info-button:hover{background-color:var(--button-bg-hover);transform:translateY(-1px)}.game-info-button:disabled{background-color:var(--button-bg-disabled);color:var(--button-text-disabled);cursor:not-allowed;transform:none}.game-info-button:disabled:hover{background-color:var(--button-bg-disabled);transform:none}.resign-button{background-color:var(--danger);color:#fff}.resign-button:hover{background-color:var(--danger-hover)}.draw-button{background-color:var(--primary);color:#fff}.draw-button:hover{background-color:var(--primary-hover)}.reset-button{background-color:var(--success);color:#fff;width:100%}.reset-button:hover{background-color:var(--success-hover)}.start-game-button{background-color:var(--success);color:#fff;width:100%;padding:14px;font-size:1rem;font-weight:600;margin-top:16px;border-radius:8px}.start-game-button:hover{background-color:var(--success-hover);transform:translateY(-2px)}.captured-pieces{display:flex;flex-direction:column;gap:16px}.captured-pieces-section{display:flex;flex-direction:column;gap:8px}.captured-header{display:flex;align-items:center;justify-content:space-between}.captured-label{font-weight:500;color:var(--text-primary);font-size:.95rem}.captured-pieces-list{display:flex;flex-wrap:wrap;gap:8px;align-items:center;min-height:28px}.captured-piece{font-size:1.4rem;padding:4px 8px;border-radius:4px;display:inline-flex;align-items:center;gap:4px}.no-captured{color:var(--text-secondary);font-style:italic}.white-captured .captured-piece{color:#fff;background-color:#000000b3;border:1px solid rgba(255,255,255,.2)}.black-captured .captured-piece{color:#000;background-color:#ffffffb3;border:1px solid rgba(0,0,0,.2)}.move-history{max-height:200px;overflow-y:auto;background-color:var(--bg-primary);padding:12px;border-radius:6px;font-family:SF Mono,Monaco,Cascadia Code,monospace;font-size:.9rem;border:1px solid var(--border-color)}.move-history-item{display:grid;grid-template-columns:40px 1fr 1fr;gap:8px;padding:4px 0;border-bottom:1px solid var(--border-color)}.move-history-item:last-child{border-bottom:none}.move-number{color:var(--text-secondary);font-weight:500}.move{padding:2px 6px;border-radius:4px}.white-move{background-color:#ffffff1a}.black-move{background-color:#0000001a}.no-moves{text-align:center;color:var(--text-secondary);font-style:italic;margin:0;padding:16px 0}.moves-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.moves-count{font-size:.85rem;color:var(--text-secondary);background-color:var(--bg-secondary);padding:4px 8px;border-radius:12px}.game-info-actions{display:flex;gap:12px}.game-mode-selection{display:flex;gap:12px;margin-bottom:20px}.mode-button{flex:1;padding:16px 12px;border:1px solid var(--border-color);border-radius:8px;background-color:var(--button-bg);color:var(--button-text);cursor:pointer;transition:var(--transition);display:flex;flex-direction:column;align-items:center;gap:8px;font-weight:500}.mode-button.active{background-color:var(--mode-button-active);color:#fff;border-color:var(--mode-button-active)}.mode-button:hover{background-color:var(--mode-button-hover);transform:translateY(-2px)}.mode-button.active:hover{background-color:var(--mode-button-active);opacity:.9}.mode-icon{font-size:1.5rem}.color-selection{margin-bottom:20px}.color-buttons{display:flex;gap:12px;margin-top:12px}.color-button{flex:1;padding:16px 12px;border:2px solid var(--border-color);border-radius:8px;cursor:pointer;transition:var(--transition);font-weight:600;display:flex;align-items:center;justify-content:center;gap:8px}.color-button.white{background-color:var(--color-button-white-bg);color:var(--color-button-white-text)}.color-button.black{background-color:var(--color-button-black-bg);color:var(--color-button-black-text)}.color-button.active{border-color:var(--color-button-active-border);box-shadow:0 0 0 3px #4a90e233}.color-button:hover{transform:translateY(-2px)}.color-swatch{width:20px;height:20px;border-radius:50%;border:2px solid var(--border-color)}.white-swatch{background-color:#f0f0f0}.black-swatch{background-color:#333}.setup-options{display:flex;flex-direction:column;gap:20px}.option-group{display:flex;flex-direction:column;gap:12px}.status-section .status-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.status-item{display:flex;flex-direction:column;gap:4px}.status-label{font-size:.85rem;color:var(--text-secondary);font-weight:500}.status-value{font-weight:600;color:var(--text-primary)}.status-value.white{color:#4a90e2}.status-value.black{color:#f0f0f0}.status-value.check{color:#ff9800}.status-value.checkmate{color:#f44336}.status-value.stalemate{color:#9e9e9e}.status-value.time{font-family:monospace;font-size:1.1rem}.button-icon{font-size:1.1rem}.move-history::-webkit-scrollbar{width:6px}.move-history::-webkit-scrollbar-track{background:transparent;border-radius:3px}.move-history::-webkit-scrollbar-thumb{background:var(--border-color);border-radius:3px}.move-history::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}@media (max-width: 768px){.game-info-container{padding:16px;gap:16px}.game-info-title{font-size:1.5rem;margin-bottom:12px;padding-bottom:12px}.game-info-content{gap:16px}.game-info-section{padding:16px}.game-mode-selection,.color-buttons,.game-info-actions{flex-direction:column}.status-grid{grid-template-columns:1fr!important}.move-history-item{grid-template-columns:30px 1fr 1fr}}.modal-overlay{position:fixed;inset:0;background-color:#000000b3;display:flex;justify-content:center;align-items:center;z-index:1000}.modal-content{background-color:var(--section-bg);border:2px solid var(--border-color);border-radius:8px;padding:20px;max-width:400px;width:90%;box-shadow:0 4px 20px #0000004d}.modal-title{margin:0 0 15px;color:var(--text-color);font-size:1.5rem;font-weight:700}.modal-message{margin:0 0 20px;color:var(--text-color);line-height:1.5}.modal-actions{display:flex;gap:12px;justify-content:flex-end}.modal-button{padding:10px 20px;border:none;border-radius:4px;cursor:pointer;font-weight:700;transition:background-color .2s ease}.modal-button-cancel{background-color:var(--button-bg);color:var(--text-color)}.modal-button-cancel:hover{background-color:var(--button-hover)}.modal-button-confirm{background-color:var(--button-danger);color:#fff}.modal-button-confirm:hover{background-color:#c82333;filter:brightness(.9)}