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

nav {
    background-color: #333;
    padding: 1rem 0;
}

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

nav ul li {
    margin: 0 1rem;
}

nav ul li a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

nav ul li a:hover {
    background-color: #555;
}

.content {
    max-width: 800px;
    margin: 2rem auto;
    padding: 2rem;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

h1 {
    color: #333;
    text-align: center;
}

h2 {
    color: #555;
    border-bottom: 2px solid #eee;
    padding-bottom: 0.5rem;
}

.content-block {
    margin-top: 2rem;
    padding: 1rem;
    background-color: #f9f9f9;
    border-radius: 6px;
}

ul, ol {
    line-height: 1.6;
}

p {
    line-height: 1.6;
    color: #666;
}