.collapse {
  max-height: 0;
  overflow: hidden;
  transition-duration: ~"calc(var(--common-animationDuration-primary) * 2)";
  transition-timing-function: cubic-bezier(0, 1, 0, 1);
  transition-property: max-height;

  &--show {
    max-height: 99em;
    transition-timing-function: ease-in-out;
  }
}