body {
    font-family: Arial, sans-serif;
    margin: 0;
    background-color: #f4f4f4;
    text-align: center;
}

/* Header */

header {
    background-color: #333;
    color: white;
    padding: 20px 0;
}

/* Navigation */

nav ul {
    list-style: none;
    padding: 0;
    margin: 15px 0 0 0;
    display: flex;
    justify-content: center;
    gap: 30px;
}

nav a {
    color: white;
    text-decoration: none;
    font-size: 16px;
}

nav a:hover {
    text-decoration: underline;
}

/* Main Content */

main {
    padding: 40px;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    border: none;
    background-color: #0077cc;
    color: white;
    cursor: pointer;
}

button:hover {
    background-color: #005fa3;
}

/* Footer */

footer {
    margin-top: 40px;
    padding: 20px;
    background-color: #ddd;
    padding: 20px;
}