/* UI-DATE-001: glass cards establish separate stacking contexts. Elevate only
 * a filter card with an open date popover, so later chart cards cannot cover
 * the calendar. Keep it below the existing header (30) and sidebar (40).
 * No geometry, glass surfaces, date logic or other dropdowns are changed.
 */
#app > .min-h-screen.bg-gray-50 main .card.p-4:has(.date-picker-dropdown) {
  position: relative;
  z-index: 2;
}