:root{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.6;color:#1a1a2e;background-color:#f8fafc;--color-primary: #3b82f6;--color-primary-dark: #2563eb;--color-primary-light: #60a5fa;--color-secondary: #8b5cf6;--color-accent: #f59e0b;--color-success: #10b981;--color-player1: #3b82f6;--color-player2: #ef4444;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -2px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -4px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 8px 10px -6px rgba(0, 0, 0, .1);--radius-sm: 6px;--radius-md: 10px;--radius-lg: 16px;--radius-xl: 24px;--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .35s cubic-bezier(.4, 0, .2, 1)}html{scroll-behavior:smooth}body{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{margin:0;display:flex;place-items:center;min-width:320px;min-height:100vh}#app{max-width:700px;margin:0 auto;padding:2rem;text-align:center}h1{font-size:2rem;margin:0 0 1rem;color:#1a1a2e}.board{display:grid;grid-template-columns:repeat(9,1fr);grid-template-rows:repeat(9,1fr);gap:2px;width:450px;height:450px;background:linear-gradient(145deg,#8b4513,#6b3510,#5d3a1a);border:4px solid #4a2c0f;border-radius:8px;margin:0 auto;box-shadow:0 8px 24px #00000040,0 2px 8px #00000026,inset 0 1px #ffffff1a;position:relative}.cell{display:flex;align-items:center;justify-content:center;font-size:28px;cursor:pointer;-webkit-user-select:none;user-select:none;transition:background-color var(--transition-fast),transform var(--transition-fast),box-shadow 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