.loader {
    display: none;
    width: 48px;
    height: 48px;
    border: 5px solid #eceeef;
    border-bottom-color: #FFF;
    border-radius: 50%;
    animation: rotation 1s linear infinite;
    margin: 0 0 10px auto;
}
.loader.active {
    display: block;
}
@keyframes rotation {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}