.ribbon {
    position: fixed;
    bottom: -50px;
    pointer-events: none;
    animation: rise linear infinite;
    z-index: 9999;
}

@keyframes rise {
    0% {
        transform: translateY(0);
        opacity: 1;
    }
    100% {
        transform: translateY(-110vh);
        opacity: 0;
    }
}