html {
    width: 100%;
    height: 100%;
    margin: 0;
    background-color: #000;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-self: center;
    overflow: hidden;

}

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

#backgroundVideo {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    object-fit: cover;
}

#fallingCats {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.cat {
    width: 50px;
    animation: fall 3s linear;
    position: absolute;
}

@keyframes bigfall {
    from {
        transform: translateY(0) rotate(0deg);
    } to {
        transform: translateY(100vh) rotate(720deg);
    }
}

@keyframes fall {
    from {
        transform: rotate(45deg);
    } to {
        transform: translateY(100vh) rotate(45deg);
    }
}


.bigcat {
    width: 100px;
    animation: bigfall 1s linear;
    position: absolute;
}