body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f4;
    color: #333;
}

header {
    background: #007BFF;
    color: white;
    padding: 1rem 0;
    text-align: center;
}

h2 {
    margin: 0;
}

main {
    padding: 1rem 2rem;
    background: white;
    margin: 1rem auto;
    max-width: 800px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

section {
    margin-bottom: 2rem;
}

h4 {
    color: #007BFF;
    border-bottom: 2px solid #007BFF;
    padding-bottom: 0.5rem;
}

ul {
    list-style-type: square;
    padding-left: 1.5rem;
}

pre {
    background: #f4f4f4;
    padding: 1rem;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Times New Roman', Times, serif;
}