@keyframes spinner {
    to {transform: rotate(360deg);}
}
 
@-webkit-keyframes spinner {
    to {-webkit-transform: rotate(360deg);}
}
 
.spinner {
    min-width: 40px;
    min-height: 40px;
}
 
.spinner:before {
    content: 'Loading...';
    position: absolute;
    width: 20px;
    height: 20px;
}
 
.spinner:not(:required):before {
    content: '';
    border-radius: 100%;
    border-top: 4px solid #03ade0;
    border-right: 2px solid transparent;
    animation: spinner .6s linear infinite;
    -webkit-animation: spinner .6s linear infinite;
}