/* Structural defaults shared by every theme. */
:root{
  --color-primary:#1D4ED8;--color-primary-dark:#172554;--color-secondary:#F97316;
  --color-background:#FFFFFF;--color-surface:#F8FAFC;--color-text:#172033;
  --color-muted:#64748B;--color-border:#E2E8F0;--header-background:#FFFFFF;--header-text:#172033;
}