* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
    background: #f5f5f5;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
}

.paper {
    background: white;
    padding: 60px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    border-radius: 8px;
}

#content h1 {
    font-size: 2.5em;
    margin-bottom: 0.5em;
    color: #1a1a1a;
    justify-content: center;
    display: flex;
}

#content h2 {
    font-size: 2em;
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    color: #2a2a2a;
}

#content h3 {
    font-size: 1.5em;
    margin-top: 1.2em;
    margin-bottom: 0.5em;
    color: #3a3a3a;
}

#content p {
    margin-bottom: 1.2em;
}

#content ul, #content ol {
    margin-bottom: 1.2em;
    padding-left: 2em;
}

#content li {
    margin-bottom: 0.5em;
}

#content code {
    background: #f4f4f4;
    padding: 2px 6px;
    border-radius: 3px;
    font-family: 'Courier New', monospace;
    font-size: 0.9em;
}

#content pre {
    background: #f4f4f4;
    padding: 15px;
    border-radius: 5px;
    overflow-x: auto;
    margin-bottom: 1.2em;
}

#content pre code {
    background: none;
    padding: 0;
}

#content blockquote {
    border-left: 4px solid #ddd;
    padding-left: 20px;
    margin: 1.2em 0;
    color: #666;
    font-style: italic;
}

#content a {
    color: #0066cc;
    text-decoration: none;
}

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

#content img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 1.5em 0;
}