ansform: translateX(-50%);
            background: rgba(0,0,0,0.7);
            padding: 10px 20px;
            border-radius: 25px;
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255,255,255,0.2);
            z-index: 1000;
        }

        .presentation-title {
            color: white;
            font-size: 18px;
            font-weight: bold;
            margin: 0;
        }

        .exit-btn {
            position: fixed;
            top: 20px;
            right: 20px;
