body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f9f9f9;
}

header {
    background-color: #333;
    padding: 10px 0;
}

nav ul {
    list-style-type: none;
    display: flex;
    justify-content: center;
    margin: 0;
    padding: 0;
}

nav li {
    margin: 0 15px;
}

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

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

section {
    padding: 40px;
    text-align: center;
}

h1, h2 {
    color: #333;
}

button {
    padding: 10px 20px;
    font-size: 16px;
    cursor: pointer;
    margin-top: 20px;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 15px 0;
}