:root {
    --bg: #0d1117;
    --nav-bg: #161b22;
    --card-bg: #161b22;
    --input-bg: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --border-color: #30363d;
    --accent: #7c6aef;
    --hover-bg: rgba(255, 255, 255, 0.05);
    --code-bg: #161b22;
    --popover-bg: #1f262f;
    --popover-shadow: 0 10px 32px rgba(0,0,0,0.55);
}
body { background: var(--bg); color: var(--text-primary); }
.markdown-body a { color: #a78bfa; }
.markdown-body th { background: #21262d; }