body {
            margin: 0;
            padding: 0;
            height: 100vh;
            display: flex;
            justify-content: center;
            align-items: center;
            background: white;
            font-family: 'Arial', sans-serif;
            overflow: hidden;
        }
        #playButton {
            padding: 20px 50px;
            font-size: 24px;
            background: #e0322c;
            color: white;
            border: none;
            border-radius: 8px;
            cursor: pointer;
            box-shadow: 0 4px 8px rgba(0,0,0,0.2);
            transition: all 0.3s ease;
            z-index: 1000;
        }
        .fullscreen-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: white;
            display: flex;
            justify-content: center;
            align-items: center;
            z-index: 999;
        }