section{height:100vh}#section-1{background-color:#fcc}#section-2{background-color:#cfc}#section-3{background-color:#ccf}.fade-in{opacity:0;transition:opacity 1s ease-in-out}.slide-right{transform:translateX(-100%)}.slide-left,.slide-right{transition:transform 1s ease-in-out}.slide-left{transform:translateX(100%)}.in-view{opacity:1;transform:none}