:root{--color-bg:#ffffff;--color-surface:#f8fafc;--color-border:#e2e8f0;--color-text:#0f172a;--color-text-muted:#64748b;--color-brand:#1e3a8a}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--color-bg);color:var(--color-text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;line-height:1.5}a{color:var(--color-brand);text-decoration:none}a:hover{text-decoration:underline}