body {
    background-image: url('/veterinaria/public/img/login-background.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
 }

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}