---

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f6f8;
    color: #333;
}

header {
    background-color: #2c3e50;
    padding: 15px 30px;
}

nav a {
    color: #ffffff;
    text-decoration: none;
    font-weight: bold;
    margin-right: 20px;
}

main {
    max-width: 800px;
    margin: 40px auto;
    padding: 25px;
    background: #ffffff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

footer {
    text-align: center;
    padding: 20px;
    font-size: 0.9em;
    color: #777;
}