:root{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;line-height:1.5;font-weight:400;--color-primary: #2563eb;--color-primary-light: #3b82f6;--color-primary-dark: #1d4ed8;--color-accent: #0ea5e9;--color-success: #059669;--color-warning: #d97706;--color-error: #dc2626;--color-gray-25: #fcfcfd;--color-gray-50: #f8fafc;--color-gray-100: #f1f5f9;--color-gray-200: #e2e8f0;--color-gray-300: #cbd5e1;--color-gray-400: #94a3b8;--color-gray-500: #64748b;--color-gray-600: #475569;--color-gray-700: #334155;--color-gray-800: #1e293b;--color-gray-900: #0f172a;--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 2.5rem;--space-3xl: 3rem;--space-4xl: 4rem;--radius-sm: .25rem;--radius-md: .375rem;--radius-lg: .5rem;--radius-xl: .75rem;--radius-2xl: 1rem;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 1px 3px 0 rgba(0, 0, 0, .1), 0 1px 2px 0 rgba(0, 0, 0, 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#00ff004d}.direction-btn:disabled{opacity:.5;cursor:not-allowed}.instructions{background:#ffffff1a;padding:1.5rem;border-radius:12px;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.2)}.instructions h3{margin:0 0 1rem;color:#0f0}.instructions ul{margin:0;padding-left:1.5rem}.instructions li{margin-bottom:.5rem;color:#ccc}.game-over-modal{position:fixed;inset:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:1000}.modal-content{background:linear-gradient(135deg,#1a1a3a,#2a2a5a);padding:2rem;border-radius:16px;text-align:center;border:2px solid #00ff00;box-shadow:0 0 30px #00ff004d;color:#fff}.modal-content h2{margin:0 0 1rem;color:red;font-size:2rem;text-shadow:0 0 10px rgba(255,0,0,.5)}.modal-content p{margin:.5rem 0;font-size:1.2rem}.new-high-score{color:gold;font-weight:700;animation:celebration 1s ease-in-out infinite}@keyframes celebration{0%,to{transform:scale(1)}50%{transform:scale(1.1)}}.play-again-btn{margin-top:1.5rem;padding:1rem 2rem;background:#28a745;color:#fff;border:none;border-radius:8px;font-size:1.2rem;font-weight:700;cursor:pointer;transition:all .3s ease;border:2px solid transparent}.play-again-btn:hover{background:#218838;transform:translateY(-2px)}.play-again-btn:focus{outline:none;border-color:#fff;box-shadow:0 0 0 2px #ffffff4d}@media (max-width: 768px){.arcade-game{padding:.5rem}.game-header h1{font-size:2rem}.game-stats{gap:1rem}.game-container{flex-direction:column;align-items:center}.game-board{grid-template-columns:repeat(20,15px);grid-template-rows:repeat(20,15px)}.cell{width:15px;height:15px}.game-controls{width:100%;max-width:300px}.control-buttons{flex-direction:row;flex-wrap:wrap;justify-content:center}.control-btn{flex:1;min-width:120px}}:root{font-family:Inter,system-ui,Avenir,Helvetica,Arial,sans-serif;line-height:1.5;font-weight:400;color-scheme:light 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