:root{--castalia-bg:#ffffff;--castalia-surface:#f8fafc;--castalia-text:#0f172a;--castalia-muted:#64748b;--castalia-accent:#d97706;--castalia-accent-hover:#b45309;--castalia-border:#e2e8f0;--castalia-header-height:4rem;--castalia-radius-sm:0.375rem;--castalia-radius-md:0.75rem;--castalia-radius-lg:1rem;--castalia-radius-xl:1.5rem}.dark,html.dark{--castalia-bg:#0f172a;--castalia-surface:#1e293b;--castalia-text:#f1f5f9;--castalia-muted:#94a3b8;--castalia-accent:#fbbf24;--castalia-accent-hover:#f59e0b;--castalia-border:#334155}