1@keyframes spinner {
2    to {transform: rotate(360deg);}
3}
4
5.lazy-loading:before {
6    content: '';
7    box-sizing: border-box;
8    position: absolute;
9    top: 50%;
10    left: 50%;
11    width: 30px;
12    height: 30px;
13    margin-top: -15px;
14    margin-left: -15px;
15    border-radius: 50%;
16    border: 1px solid #ccc;
17    border-top-color: #07d;
18    animation: spinner .6s linear infinite;
19}
20