html{scroll-behavior:smooth}.fade-in{opacity:0;transform:translateY(20px);transition:opacity .6s ease-out,transform .6s ease-out}.fade-in.visible{opacity:1;transform:translateY(0)}.hero h1{animation:fadeInDown 1s ease}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}