:root{--primary:#6366f1;--primary-hover:#4f46e5;--bg:#f5f5f5;--card-bg:#fff;--text:#1a1a2e;--text-secondary:#6b7280;--border:#e5e7eb;--error:#ef4444;--success:#22c55e;--radius:12px}*{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}