@keyframes fadeSlideIn {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

body, header, section, div, h1, h2, h3, h4, p, a, img, button {
    animation: fadeSlideIn 0.6s ease-in-out;
}