:root{--bg-primary:#f5f5f5;--bg-secondary:#ffffff;--bg-tertiary:#e8e8e8;--bg-input:#ffffff;--border-subtle:#e0e0e0;--border-focus:#4a90d9;--text-primary:#111111;--text-secondary:#555555;--text-tertiary:#888888;--accent-blue:#0084ff;--accent-blue-hover:#0073e6;--accent-gradient:linear-gradient(135deg,#0084ff,#00c6ff);--accent-success:#00c853;--accent-warning:#ff9800;--accent-error:#ff3b30;--accent-purple:#8b5cf6;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-full:9999px;--sidebar-width:280px;--content-max:720px;--skeleton-bg:#e0e0e0}.dark{--bg-primary:#0a0a0a;--bg-secondary:#1a1a1a;--bg-tertiary:#2a2a2a;--bg-input:#1e1e1e;--border-subtle:#2e2e2e;--border-focus:#4a90d9;--text-primary:#e8e8e8;--text-secondary:#8e8e8e;--text-tertiary:#5a5a5a;--skeleton-bg:#2e2e2e}