:root{
  /* Depth comes from surface value, not from drop shadow. Panels lift by
     changing --raised to --raised-2. Shadows exist only where an element
     genuinely floats above photography. */
  --shadow-none:none;
  --shadow-float:0 8px 24px rgba(5,8,11,.45);
  --shadow-overlay:0 24px 64px rgba(5,8,11,.62);
  --shadow-inset-line:inset 0 -1px 0 rgba(242,244,246,.10);
  --ring-focus:0 0 0 2px var(--ground),0 0 0 4px var(--volt); /* @kind shadow */
}