.loading {
    position: relative;
    opacity:0.5;
    pointer-events: none;
}
.loading:before {
    content:'\f021';
    display:inline-block;
    animation: fa-spin 2s infinite linear;
    position: absolute;
    top:10px;
    left:50%;
    margin-left:-50px;
    text-align: center;
    font: normal normal normal 14px/1 FontAwesome;
    font-size: 100px;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
    z-index: 1;
}