.loader{border:3px solid #f3f3f3;border-top:3px solid #3498db;border-radius:50%;width:60px;height:60px;-webkit-animation:spin 1s linear infinite;animation:spin 1s linear infinite;position:fixed;left:calc(50% - 30px);top:calc(50vh - 30px)}@-webkit-keyframes spin{0%{-webkit-transform:rotate(0);transform:rotate(0)}100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}@keyframes spin{0%{-webkit-transform:rotate(0);transform:rotate(0)}100%{-webkit-transform:rotate(360deg);transform:rotate(360deg)}}