.loading {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: #4fa2af;
    opacity: 0.8;
    display: none;
}

.loader {
    left: 50%;
    margin-left: -4em;
    font-size: 10px;
    border: .8em solid rgba(218, 219, 223, 1);
    border-left: .8em solid #f7cc2b;
    animation: spin 1.1s infinite linear;
}

    .loader, .loader:after {
        border-radius: 50%;
        width: 8em;
        height: 8em;
        display: block;
        position: absolute;
        top: 50%;
        margin-top: -4.05em;
    }

@keyframes spin {
    0% {
        transform: rotate(360deg);
    }

    100% {
        transform: rotate(0deg);
    }
}