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

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

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

main {
    padding: 20px;
}

section {
    background: white;
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.1);
}

h2 {
    color: #333;
}

button.toggle-btn {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 10px;
    margin-top: 10px;
    cursor: pointer;
}

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

.content {
    display: none;
    margin-top: 10px;
}

footer {
    text-align: center;
    background-color: #333;
    color: white;
    padding: 10px;
    position: relative;
    bottom: 0;
    width: 100%;
}