body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

strong {
    color: red;
}

h1 {
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

h2 {
    color: #2980b9;
}

.topic {
    background-color: #ecf0f1;
    border-left: 5px solid #3498db;
    padding: 10px;
    margin-bottom: 20px;
}

.topic h3 {
    margin-top: 0;
    color: #2c3e50;
}

#toc {
    background-color: #f9f9f9;
    border: 1px solid #ddd;
    padding: 20px;
    margin-bottom: 20px;
}

#toc h2 {
    margin-top: 0;
}

#toc ul {
    list-style-type: none;
    padding-left: 0;
}

#toc li {
    margin-bottom: 5px;
}

#toc a {
    text-decoration: none;
    color: #3498db;
}

#toc a:hover {
    text-decoration: underline;
}

.code-block {
    position: relative;
    margin-bottom: 20px;
}

pre[class*="language-"] {
    border-radius: 5px;
    border: 1px solid #ddd;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.copy-button {
    position: absolute;
    top: 5px;
    right: 5px;
    padding: 5px 10px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 3px;
    cursor: pointer;
    font-size: 12px;
}

.copy-button:hover {
    background-color: #2980b9;
}

@media (max-width: 600px) {
    body {
        padding: 10px;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 20px;
    }
    
    .topic h3 {
        font-size: 18px;
    }

    pre[class*="language-"] {
        font-size: 14px;
    }
}