body.login::before {
    display: block;
    content: "";

    background-image: var(--login-background-image);
    background-repeat: no-repeat;
    background-position: center center;
    background-attachment: fixed;
    background-size: cover;

    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    z-index: -1;
    opacity: 0.25;
}