:root{
  /* flat. hairlines carry structure; shadow exists only for floating layers */
  --shadow-0:none;
  --shadow-1:none;
  --shadow-2:0 2px 8px rgba(0,0,0,.08);
  --shadow-3:0 12px 32px rgba(0,0,0,.16);
  --shadow-inset:none;
  --shadow-inset-dark:none;
  --glow-alarm:0 0 0 3px rgba(198,54,47,.18);
  --scrim-blur:none;
}