/* Three levels. Borders do most separation work; shadows are ink-tinted, never black. */
:root{
  --elevation-flat:none;
  --elevation-raised:0 1px 2px rgba(13,48,52,0.06), 0 4px 12px rgba(13,48,52,0.08);
  --elevation-overlay:0 12px 40px rgba(13,48,52,0.20);
}
:root[data-theme="dark"], .dark{
  --elevation-raised:0 1px 2px rgba(0,0,0,0.32), 0 4px 12px rgba(0,0,0,0.40);
  --elevation-overlay:0 12px 40px rgba(0,0,0,0.48);
}