:root{--primary-color:#4f46e5;--primary-hover:#4338ca;--secondary-color:#64748b;--background:#f8fafc;--foreground:#0f172a;--card-bg:#fff;--border-color:#e2e8f0;--error-color:#ef4444;--font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-family);background-color:var(--background);color:var(--foreground);line-height:1.6}a{color:inherit;text-decoration:none}button{cursor:pointer;font-family:inherit}