body {
            font-family: Arial, sans-serif;
            margin: 0;
            overflow: hidden;
            background-color: #000;
        }
        .background-video {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: -1;
            filter: brightness(0.8) blur(3px);
            transition: opacity 2s;
        }
        .countdown {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            text-align: center;
            color: #fff;
            text-shadow: 0 0 10px rgba(0, 0, 0, 0.7);
            transition: opacity 2s;
        }
        .countdown h1 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }
        .time {
            font-size: 4rem;
            font-weight: bold;
            text-align: center;
        }
        .time.red {
            color: red;
        }
        .fade-out {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: #fff;
            opacity: 0;
            transition: opacity 2s;
            z-index: 10;
        }
        .message {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            color: #fff;
            font-size: 2rem;
            text-align: center;
            opacity: 0;
            z-index: 20;
            transition: opacity 2s, transform 2s;
        }