body {
    background-image: url("fondo.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}

header {
    display: inline-block;
    background-color: white;
    border: 2px solid blue;
    border-radius: 0.3em;
    text-align: center;
    height: 30%;
    width: 100%;
    box-sizing: initial;
}

nav {
    display: inline-block;
    background-color: white;
    border: 2px solid blue;
    border-radius: 0.3em;
    text-align: center;
    margin-top: 5px;
    height: 30%;
    width: 100%;
    box-sizing: initial;
}

section {
    display: inline-block;
    background-color: white;
    border: 2px solid blue;
    border-radius: 0.3em;
    margin-top: 2px;
    height: 30%;
    width: 100%;
    box-sizing: initial;
}

footer {
    display: inline-block;
    border: 2px solid blue;
    background-color: white;
    border-radius: 0.3em;
    margin-top: 300px;
    height: 30%;
    width: 100%;
    box-sizing: initial;
}

h1 {
    color: blue;
    text-align: center;
    font-size: medium;
}

h2 {
    color: blue;
    text-align: center;
}

h4 {
    color: blue;
    text-align: center;
}