body {
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f5f8ff;
    color: #222;
}
header {
    background-color: #007BFF;
    color: white;
    padding: 1em 0;
    text-align: center;
}
nav {
    background: #0056b3;
    display: flex;
    justify-content: center;
    padding: 0.5em;
}
nav a {
    color: white;
    margin: 0 1em;
    text-decoration: none;
}
main {
    padding: 2em;
}
footer {
    background: #003974;
    color: white;
    text-align: center;
    padding: 1em 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}