.bottombar {
  position:relative;
  flex: 0 0 auto;             /* grow: 0; shrink: 0; basis: auto; */
  height: var(--footer-height);

  padding-top: var(--bar-padding-y);
  padding-bottom: calc(var(--bar-padding-y) + env(safe-area-inset-bottom));
  padding-left: calc(var(--bar-padding-x) + env(safe-area-inset-left));
  padding-right: calc(var(--bar-padding-x) + env(safe-area-inset-right));

  border-top-width: 1px;
  border-top-style: solid;
  border-top-color: var(--border-color);

  transition:
    background-color var(--theme-transition),
    border-top-color var(--theme-transition),
    box-shadow var(--theme-transition);

  z-index: 1000;
}