body {
    background: linear-gradient(-45deg, #f59173, #fa8db7, #7ad9fc, #76ffdf);
    background-size: 500% 500%;
    animation: gradient 30s ease infinite;
}

@keyframes gradient {
    0% {
        background-position: 0% 50%;
    }
    50% {
        background-position: 100% 50%;
    }
    100% {
        background-position: 0% 50%;
    }
}