body {
    font-family: Tahoma, Verdana, Arial, sans-serif;
    max-width: 800px;
    margin: 0 auto;
    background-color: #f0f8ff;
    color: #003366;
    padding: 10px;
}

header, footer {
    text-align: center;
    background-color: #99ccff;
    padding: 10px;
    border-radius: 10px;
    margin-bottom: 20px;
}

nav a {
    margin: 0 10px;
    color: #003366;
    text-decoration: none;
    font-weight: bold;
}

nav a:hover {
    color: #ff6600;
}

h1 {
    color: #0066cc;
}

h2 {
    color: #004080;
}

img {
    display: block;
    margin: 10px auto;
    border-radius: 10px;
}