.markdown-content {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    line-height: 1.6;
    color: #333;
}

.markdown-content h1,
.markdown-content h2,
.markdown-content h3,
.markdown-content h4,
.markdown-content h5,
.markdown-content h6 {
    margin-top: 1.5em;
    margin-bottom: 0.5em;
    color: #2c3e50;
}

.markdown-content p { margin-bottom: 1.2em; }

.markdown-content pre {
    background-color: #f0f4f8;
    border-radius: 6px;
    overflow-x: auto;
    border: 1px solid #d0d7de;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin: 0;
    line-height: 1.1;
}

.markdown-content pre > code {
    display: block;
    padding: 0.5em;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    color: #24292f;
}

.markdown-content :not(pre) > code {
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.9em;
    background-color: #f0f4f8;
    padding: 0.2em 0.4em;
    border-radius: 3px;
    color: #24292f;
}

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

.markdown-content a {
    color: #0366d6;
    text-decoration: none;
}

.markdown-content a:hover {
    text-decoration: underline;
}

.markdown-content blockquote {
    margin: 0;
    padding-left: 1em;
    border-left: 4px solid #dfe2e5;
    color: #6a737d;
}

.markdown-content table {
    border-collapse: collapse;
    width: 100%;
    margin-bottom: 1.2em;
}

.markdown-content table th,
.markdown-content table td {
    padding: 6px 13px;
    border: 1px solid #dfe2e5;
}

.markdown-content table th {
    background-color: #f6f8fa;
}

.markdown-content img {
    max-width: 100%;
    height: auto;
}

.markdown-content hr {
    height: 2px;
    background-color: #e1e4e8;
    border: none;
    margin: 2em 0;
}

body { display: flex; font-family: Arial, sans-serif; }
#sidebar { width: 25%%; background: #f0f0f0; padding: 20px; height: 100vh; overflow-y: auto; }
#content { width: 75%%; padding: 20px; }
.disabled { color: grey; pointer-events: none; text-decoration: none; }
.nav-links { margin-top: 20px; }
.nav-links a { margin: 0 10px; text-decoration: none; color: blue; }