body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: Arial, sans-serif;
    overflow: hidden;
    position: relative;
}

.video-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
}

#background-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.conttext {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.countdown {
    font-size: 48px;
    color: white;
    background-color: black;
    padding: 20px;
    border-radius: 10px;
    animation: colorChange 1s infinite alternate;
}

@keyframes colorChange {
    0% {
        color: white;
        background-color: black;
    }
    50% {
        color: black;
        background-color: white;
    }
    100% {
        color: white;
        background-color: black;
    }
}