body {
    display: block;
}

#welcome {
    float: right;
    text-decoration: none;
}

#welcome > pre {
    color: white;
    font-size: 1.1vw;
    font-family: Arial;
    margin: 10ex;
    text-shadow: 0 0 20px black;
}

#cloud {
    background: url("nubes.png");
    background-size: cover;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999;
    pointer-events: none;
}