.fade-in {
    animation: fadeIn 0.8s ease-in-out;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
body > div {
    opacity: 0;
    animation: fadeIn 0.8s ease-in-out forwards;
}
.transform {
    transition: all 0.3s ease;
}