body {
    font-family: 'Times New Roman', Times, serif;
    background-color: #f4f4f9;
    margin: 0;
    padding: 20px;
    color: #333;
    line-height: 1.6;
}

h2 {
    color: #2c3e50;
    text-align: center;
    font-size: 28px;
    margin-bottom: 20px;
    text-transform: uppercase;
    text-shadow: 1px 1px 2px #ddd;
}

pre {
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    border-radius: 5px;
    padding: 20px;
    font-size: 16px;
    color: #444;
    overflow-x: auto;
}

pre > b {
    color: #2c3e50;
    font-weight: bold;
    font-size: 18px;
}


pre b:contains('Key Concepts of Variables in C:') {
    color: #007bff;
    text-decoration: underline;
}

pre b:contains('Example Program:') {
    color: #28a745;
    text-decoration: underline;
}

pre code {
    font-family: 'Times New Roman', Times, serif;
    background-color: #eaf1f5;
    color: #2d3436;
    padding: 10px;
    display: block;
    border-radius: 5px;
    border: 1px solid #ccd;
    margin: 10px 0;
}

pre span.inline-code {
    font-family: 'Times New Roman', Times, serif;
    background-color: #f0f0f0;
    color: #d35400;
    padding: 2px 5px;
    border-radius: 3px;
    border: 1px solid #ddd;
}

pre ul {
    list-style: circle;
    margin-left: 20px;
    margin-top: 10px;
}

pre ul > li {
    margin: 5px 0;
}

pre b:contains('Data Types:'),
pre b:contains('Variable Types in Detail:') {
    color: #e74c3c;
    font-style: italic;
    font-size: 18px;
}


pre code:contains('#include') {
    color: #8e44ad;
    font-weight: bold;
}

pre code:contains('int'), 
pre code:contains('float'),
pre code:contains('char') {
    color: #2980b9;
    font-weight: bold;
}

pre code:contains('printf') {
    color: #16a085;
    font-weight: bold;
}