.loader {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loader>img {
    max-width:100%;
    max-height:100%;
    position:absolute;
    top:0; left:0; right:0; bottom:0;
    margin:auto;
}

.loader.hidden {
    animation: fadeOut 1s;
    animation-fill-mode: forwards;
}