:root{--bg-color: #ffffff;--text-color: #213547;--border-color: #cccccc;--border-hover-color: #999999;--canvas-bg: #ffffff;--accent-color: #646cff;--accent-hover-color: #535bf2}@media (prefers-color-scheme: dark){:root{--bg-color: #1a1a1a;--text-color: #e6e6e6;--border-color: #444444;--border-hover-color: #666666;--canvas-bg: #2a2a2a;--accent-color: #747bff;--accent-hover-color: #8b93ff}}*{box-sizing:border-box}html{color-scheme:light dark}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh;background-color:var(--bg-color);color:var(--text-color);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,sans-serif;line-height:1.6;font-weight:400;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s ease,color .3s ease}#app{max-width:1280px;margin:0 auto;padding:2rem;text-align:center;background-color:var(--bg-color);border-radius:12px;transition:all .3s ease}.game-title{margin-bottom:1.5rem;font-size:2rem;font-weight:700;color:var(--text-color)}#canvas{border:2px solid var(--border-color);border-radius:8px;background-color:var(--canvas-bg);transition:border-color .3s ease}#canvas:hover{border-color:var(--border-hover-color)}