h1 {
    text-align: center;
}

h2 {
    text-align: center;
}

nav { 
    text-align: center;
}

img {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

iframe {
    display: block;
    margin-left: auto;
    margin-right: auto;
}
audio {
    display: block;
    margin-left: auto;
    margin-right: auto;
}

footer {
    text-align: center;
}

a {
    color: #FFFFFF;
}


body {
    background-color: #0000FF;
    color: #FF00FF;
    font-family: Arial, sans-serif;
    margin: 10px;
    text-align: center;
}