*,:after,:before{box-sizing:border-box;margin:0;padding:0}:root{--color-primary:#2563eb;--color-primary-hover:#1d4ed8;--color-bg:#ffffff;--color-bg-secondary:#f8fafc;--color-text:#0f172a;--color-text-secondary:#64748b;--color-border:#e2e8f0;--color-error:#dc2626;--color-success:#16a34a;--radius:8px}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--color-text);background:var(--color-bg);line-height:1.5;-webkit-font-smoothing:antialiased}a{color:var(--color-primary);text-decoration:none}button{cursor:pointer;border:none;font:inherit}