body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background: #f9f9f9;
    color: #333;
}
header {
    background-color: #2c3e50;
    padding: 20px;
    color: white;
    text-align: center;
}
nav {
    background-color: #34495e;
    padding: 10px;
    text-align: center;
}
nav a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
}
main {
    padding: 20px;
}
footer {
    background-color: #ecf0f1;
    text-align: center;
    padding: 15px;
    font-size: 14px;
}