:root{--color-text:#1f2328;--color-muted:#656d76;--color-border:#d0d7de;--color-bg:#fff;--color-surface:#f6f8fa;--color-stripe:#fbfcfd;--color-warn-fg:#7d4e00;--color-warn-bg:#fff8c5;--color-warn-border:#d4a72c;--color-error-fg:#cf222e;--color-error-bg:#ffebe9;--color-error-border:#ff8182;--color-accent:#0969da;--color-on-accent:#fff;--space-1:4px;--space-2:8px;--space-3:12px;--space-4:16px;--space-5:24px;--radius:6px;--border:1px solid var(--color-border)}*{box-sizing:border-box}body{font-family:system-ui,-apple-system,Segoe UI,sans-serif;font-size:14px;line-height:1.5;color:var(--color-text);background:var(--color-bg)}body,h1{margin:0}h1{font-size:20px}