/* Custom primary (header) — ~10% darker than the slate page bg (#21222c).
   palette.primary is "custom", so these win over Material's defaults. */
:root,
[data-md-color-primary="custom"] {
  --md-primary-fg-color:        #0f0f0f;
  --md-primary-fg-color--light: #0f0f0f;
  --md-primary-fg-color--dark:  #000000;
  --md-primary-bg-color:        #ffffff;
  --md-primary-bg-color--light: rgba(255, 255, 255, 0.7);
}