body {
            background-color: #0f111a;
            color: #ffffff;
            font-family: sans-serif;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            height: 100vh;
            margin: 0;
        }

        h1 { color: #00ffcc; margin-bottom: 5px; }
        p { color: #8a8ab5; margin-top: 0; margin-bottom: 20px; font-size: 14px; }

        .controls {
            margin-bottom: 20px;
            display: flex;
            gap: 15px;
            align-items: center;
            background: #171925;
            padding: 10px 20px;
            border-radius: 8px;
        }

        .grid {
            display: grid;
            grid-template-columns: repeat(16, 40px);
            gap: 4px;
        }

        .cell {
            width: 40px;
            height: 40px;
            background-color: #202336;
            border-radius: 4px;
            cursor: pointer;
            transition: background 0.1s;
        }

        /* Zustand: Aktiviertes Kästchen */
        .cell.active {
            background-color: #00ffcc;
            box-shadow: 0 0 8px rgba(0, 255, 204, 0.5);
        }

        /* Zustand: Der Abspielbalken läuft gerade durch */
        .cell.playing {
            outline: 2px solid #ffffff;
        }

        button {
            background: #00ffcc;
            border: none;
            padding: 10px 20px;
            font-weight: bold;
            border-radius: 4px;
            cursor: pointer;