index.css

#firefox,#learn,#ltext,#select,.l{position:absolute}@keyframes rotate{0%{transform:translate(-50%,-50%) rotate(0)}100%{transform:translate(-50%,-50%) rotate(360deg)}}@keyframes heading{0%{top:25%;font-size:24pt}100%{top:26%;font-size:18pt}}@keyframes heading2{0%{top:26%;font-size:18pt}100%{top:15%;font-size:14pt}}@keyframes fadeout{0%{opacity:1;visibility:visible}100%{opacity:0;visibility:hidden}}@keyframes fadeoutb{0%{opacity:1}100%{opacity:.6}}body{margin:0;padding:0;font-family:sans-serif;background-color:#2E8B57;animation:fadeout 1s reverse}#firefox,#selectout,.btn{padding:10px 20px}.l{left:50%;top:50%;border-radius:50%;border:3px solid transparent;border-left:3px solid #fff;animation:rotate 2s infinite linear}#l1,#l2,#l3{animation-timing-function:ease-in-out}#l1,#l4{animation-direction:reverse}#l0{width:100px;height:100px;animation-duration:1.5s}#l1{width:120px;height:120px;animation-duration:2.3s}#l2{width:140px;height:140px;animation-duration:2.5s;animation-direction:alternate}#l3{width:160px;height:160px;animation-duration:2.7s}#l4{width:180px;height:180px;animation-duration:2.1s}#l5{width:200px;height:200px;animation-duration:3s}#ltext{text-align:center;box-sizing:border-box;width:100%;color:#fff;animation:heading 1s ease-out 4s forwards;top:25%;font-size:24pt}#load{animation:fadeoutb .9s ease-out 4s forwards;z-index:-1}#select{top:32%;left:35%;width:30%;height:50%;text-align:center;opacity:0;animation:fadeout .8s ease-out 4.5s forwards reverse;z-index:5}#selectout{margin:5px 5px 10px;background:#e60026;color:#fff;border-radius:5px;opacity:0;visibility:hidden}#firefox{top:0;left:0;width:100%;background:#e60026;color:#fff;border-bottom-left-radius:5px;border-bottom-right-radius:5px;text-align:center}.btn{border-radius:40px;font-family:Arial;color:#2E8B57;background:#fff;font-size:20px;margin:3px;border:none;transition:background-color .5s}.btn:hover{background:#b3e6c9}#learn{top:20%;left:25%;width:50%;height:50%;text-align:center;opacity:0}hr{border-left:none;border-right:none;border-bottom:none;border-top:1px solid #000}