body {
    font-family: "Times New Roman", Times, serif;
    background-color: #c0c0c0;
    margin: 20px;
    line-height: 1.4;
}

main {
    background-color: #ffffff;
    padding: 20px;
    border: 4px ridge #ffff00;
    max-width: 800px;
    margin: auto;
}

nav {
    background-color: #000080;
    color: #ffffff;
    margin-bottom: 20px;
    padding: 8px;
    text-align: center;
}

nav a {
    color: #ffff00;
    font-weight: bold;
}

h1 {
    color: #ff0000;
    text-align: center;
}

h2,
h3,
h4 {
    color: #000080;
}

hr {
    border: 0;
    border-top: 2px dotted #000080;
}