body {
            margin: 0;
            padding: 0;
            background-color: #050505;
            color: #fff;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            overflow: hidden;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            touch-action: none; /* Prevent mobile scrolling */
        }

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

        canvas {
            display: block;
            background: radial-gradient(circle at center, #111 0%, #000 100%);
            border: 2px solid #333;
            border-radius: 4px;
        }

        #ui-layer {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            pointer-events: none;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            padding: 20px;
            box-sizing: border-box;
        }

        .hud-top {
            display: flex;
            justify-content: space-between;
            font-size: 20px;
            font-weight: bold;
            text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
            opacity: 0.8;
        }

        #start-screen, #game-over-screen {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            background: rgba(0, 0, 0, 0.85);
            padding: 40px;
            border-radius: 10px;
            border: 1px solid #444;
            pointer-events: auto;
            backdrop-filter: blur(5px);
            box-shadow: 0 0 30px rgba(0,0,0,0.8);
            min-width: 300px;
        }

        h1 {
            margin: 0 0 20px 0;
            font-size: 3em;
            background: linear-gradient(45deg, #ff00cc, #3333ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 20px rgba(255, 0, 204, 0.3);
        }

        button {
            background: linear-gradient(90deg, #00c6ff, #0072ff);
            border: none;
            padding: 15px 40px;
            color: white;
            font-size: 1.2em;
            font-weight: bold;
            border-radius: 30px;
            cursor: pointer;
            transition: transform 0.1s, box-shadow 0.2s;
            text-transform: uppercase;
            letter-spacing: 2px;
        }

        button:hover {
            transform: scale(1.05);
            box-shadow: 0 0 20px rgba(0, 198, 255, 0.6);
        }

        button:active {
            transform: scale(0.95);
        }

        .hidden {
            display: none !important;
        }

        .controls-hint {
            margin-top: 20px;
            color: #888;
            font-size: 0.9em;
        }

        /* Mobile specific adjustments */
        @media (max-width: 600px) {
            h1 { font-size: 2em; }
            .hud-top { padding: 10px; font-size: 16px; }
        }