.custom-spinner{width:30px;height:30px;border:4px solid #f3f3f3;border-top-color:#3498db;border-radius:50%;animation:spin 1s linear infinite;position:absolute;top:50%;left:50%;transform:translate(-50%,-50%)}@keyframes spin{0%{transform:rotate(0deg)}to{transform:rotate(1turn)}}