.falling-banners {
    position: fixed;
    top: -200px;
    left: 0;
    width: 100%;
    pointer-events: none;
    z-index: 9999;
}

.banner {
    position: absolute;
    width: 180px;
    height: 80px;
    animation: fall 10s linear infinite;
}

.banner:nth-child(1) {
    left: 15%;
    animation-delay: 0s;
}

.banner:nth-child(2) {
    left: 45%;
    animation-delay: 3s;
}

.banner:nth-child(3) {
    left: 75%;
    animation-delay: 6s;
}

@keyframes fall {
    0% {
        transform: translateY(-200px) rotate(0deg);
        opacity: 1;
    }

    90% {
        opacity: 1;
    }

    100% {
        transform: translateY(120vh) rotate(15deg);
        opacity: 0;
    }
}