body {
    font-family:'Times New Roman', Times, serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background-color: #f4f4f9;
    color: #333;
}

header {
    background: #333;
    color: #fff;
    padding: 1rem 0;
    text-align: center;
}

header h2 {
    margin: 0;
    font-size: 2rem;
}

main {
    padding: 2rem;
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
}

section {
    margin-bottom: 2rem;
}

h2 {
    color: #fff9f9;
    border-bottom: 2px solid #ccc;
    padding-bottom: 0.5rem;
    margin-bottom: 1rem;
}

h4 {
    color: #000000;
    margin-top: 1.5rem;
}

p, ul, pre {
    margin-bottom: 1rem;
}

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

pre {
    background: #f8f8f8;
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow-x: auto;
}

code {
    background: #f8f8f8;
    padding: 2px 4px;
    border-radius: 4px;
}

#introduction, #declaration, #access-modify, #example, #memory-layout, #functions, #use-cases {
    padding: 1rem;
    border: 1px solid #ddd;
    border-radius: 8px;
    background-color: #f9f9f9;
}