body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background-color: #4CAF50;
    color: white;
    padding: 1rem;
    text-align: center;
}

header nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 1rem;
}

header nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: bold;
}

main {
    padding: 2rem;
}

section {
    margin-bottom: 2rem;
    padding: 1rem;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

footer {
    text-align: center;
    padding: 1rem;
    background-color: #333;
    color: white;
}