body {
    background-color: #0d1117;
    color: #e6edf3;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    max-width: 900px;
    margin: 40px auto;
    padding: 0 20px;
    line-height: 1.6;
}
h1, h2, h3 { color: #e6edf3; border-bottom: 1px solid #30363d; padding-bottom: 8px; }
code { background: #161b22; padding: 2px 6px; border-radius: 4px; color: #f0883e; }
pre { background: #161b22; padding: 16px; border-radius: 8px; overflow-x: auto; }
pre code { color: #e6edf3; padding: 0; background: none; }
table { border-collapse: collapse; width: 100%; }
td, th { border: 1px solid #30363d; padding: 8px 12px; }
th { background: #161b22; }
blockquote { border-left: 3px solid #3b82f6; margin: 0; padding-left: 16px; color: #8b949e; }
a { color: #58a6ff; }
img { max-width: 100%; }
hr { border-color: #30363d; }