@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700&display=swap');

        :root {
            --bg-color: #050510;
            --grid-line: #1a1a2e;
            --snake-color: #00ff41;
            --snake-glow: 0 0 10px #00ff41, 0 0 20px #00ff41;
            --food-color: #ff0055;
            --food-glow: 0 0 10px #ff0055, 0 0 20px #ff0055;
            --text-color: #00ffff;
            --border-glow: 0 0 15px #00ffff, inset 0 0 15px #00ffff;
        }

        body {
            margin: 0;
            padding: 0;
            background-color: var(--bg-color);
            color: var(--text-color);
            font-family: 'Orbitron', sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            overflow: hidden;
            touch-action: none; /* Prevent scroll on mobile */
        }

        #game-container {
            position: relative;
            box-shadow: 0 0 50px rgba(0, 255, 255, 0.1);
        }

        canvas {
            background-color: #0a0a14;
            border: 2px solid var(--text-color);
            box-shadow: var(--border-glow);
            display: block;
            image-rendering: pixelated;
        }

        #ui-layer {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .score-board {
            padding: 10px 20px;
            font-size: 1.5rem;
            text-shadow: 0 0 5px var(--text-color);
            display: flex;
            justify-content: space-between;
            width: 100%;
            box-sizing: border-box;
        }

        #start-screen, #game-over-screen {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: rgba(5, 5, 16, 0.9);
            border: 1px solid var(--text-color);
            box-shadow: var(--border-glow);
            padding: 2rem;
            text-align: center;
            pointer-events: auto;
            z-index: 10;
            display: flex;
            flex-direction: column;
            gap: 1rem;
            min-width: 250px;
        }

        h1 {
            margin: 0;
            font-size: 2.5rem;
            color: var(--snake-color);
            text-shadow: var(--snake-glow);
            letter-spacing: 2px;
        }

        p {
            margin: 5px 0;
            font-size: 0.9rem;
            opacity: 0.8;
        }

        button {
            background: transparent;
            color: var(--text-color);
            border: 2px solid var(--text-color);
            padding: 10px 20px;
            font-family: 'Orbitron', sans-serif;
            font-size: 1.2rem;
            cursor: pointer;
            transition: all 0.2s;
            text-transform: uppercase;
            box-shadow: 0 0 5px var(--text-color);
            margin-top: 10px;
        }

        button:hover {
            background: var(--text-color);
            color: var(--bg-color);
            box-shadow: 0 0 20px var(--text-color);
        }

        /* Mobile Controls */
        #mobile-controls {
            display: none;
            margin-top: 20px;
            width: 100%;
            max-width: 300px;
            grid-template-columns: 1fr 1fr 1fr;
            grid-template-rows: 1fr 1fr;
            gap: 10px;
            padding: 10px;
        }

        .control-btn {
            background: rgba(0, 255, 255, 0.1);
            border: 1px solid var(--text-color);
            color: var(--text-color);
            height: 60px;
            border-radius: 10px;
            font-size: 1.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            user-select: none;
            cursor: pointer;
        }

        .control-btn:active {
            background: rgba(0, 255, 255, 0.4);
        }

        .up { grid-column: 2; grid-row: 1; }
        .left { grid-column: 1; grid-row: 2; }
        .down { grid-column: 2; grid-row: 2; }
        .right { grid-column: 3; grid-row: 2; }

        @media (max-width: 768px) {
            #mobile-controls {
                display: grid;
            }
            h1 { font-size: 2rem; }
            canvas {
                max-width: 95vw;
                max-height: 60vh;
            }
        }
        
        .hidden {
            display: none !important;
        }