#loading-overlay {
    position: absolute;
    width: 100%;
    height:100%;
    left: 0;
    top: 0;
    display: none;
    align-items: center;
    background-color: #000;
    z-index: 999;
    opacity: 0.5;
}
.loading-icon{ position:absolute;border-top:2px solid #fff;border-right:2px solid #fff;border-bottom:2px solid #fff;border-left:2px solid #767676;border-radius:25px;width:25px;height:25px;margin:0 auto;position:absolute;left:50%;margin-left:-20px;top:50%;margin-top:-20px;z-index:4;-webkit-animation:spin 1s linear infinite;-moz-animation:spin 1s linear infinite;animation:spin 1s linear infinite;}
@-moz-keyframes spin { 100% { -moz-transform: rotate(360deg); } }
@-webkit-keyframes spin { 100% { -webkit-transform: rotate(360deg); } }
@keyframes spin { 100% { -webkit-transform: rotate(360deg); transform:rotate(360deg); } }