footer {
    position: relative;
    overflow: hidden;
}

.ball {
    position: absolute;
    width: 9px;
    height: 9px;
    background-color: #111827;
    border-radius: 50%;
    will-change: transform;
}

@media (prefers-reduced-motion: reduce) {
    .ball {
        animation: none;
    }
}