#chocolate-rain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
}

.drop {
    position: absolute;
    width: 50px;
    height: auto;
    opacity: 0.7;
    animation: fall linear infinite;
}