h1 {
    font-family: sans-serif;
    color: chocolate;
    text-align: center;
    font-size: 35px;
    text-shadow: rgb(150, 150, 150) 3px 3px 5px;
}

div {
   
    margin-left: 4vw;
    margin-right: auto;
}   
    
    

section {
    display: inline-block;
}

body {
    background-image: url("imagenes/fondo-agua.jpg");
    background-size: 100vw 100vw;
   
    background-attachment: fixed;
    margin: 0;
}

.footer {
    background-color: grey;
    padding: 1em 0;
    text-align: center;
    position: absolute;
    bottom: 0;
    width: 100%;
}