body {
    font-family: sans-serif;
    margin: 20px;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background-color: #333;
    color: white;
    padding: 1em 0;
    text-align: center;
    margin-bottom: 20px;
}

main {
    background-color: white;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 3px;
}

h2 {
    color: #555;
    margin-top: 0;
}

ul {
    list-style: disc;
    margin-left: 20px;
}

button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1em;
}

button:hover {
    background-color: #0056b3;
}

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