:root{--bg:#0b0f17;--surface:#111827;--border:#1f2937;--text:#e5e7eb;--muted:#9ca3af}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;line-height:1.5}body{background:var(--bg);color:var(--text);min-height:100vh}code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,Liberation Mono,monospace}