.loader {
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(255,255,255,0.8);
    z-index: 9999;
    display: flex;
    justify-content: center;
    align-items: center;
}

.loader:after {
    font-size: 20px;
    color: #000;
}