body {
    background-color: #000;
    margin: 0;
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: url('/img/bg-esteban.jpeg') no-repeat center center;
    background-size: cover;
    filter: grayscale(80%);
    z-index: -1;
    pointer-events: none;
}