consul/ui-v2/app/styles/base/components/menu-panel/layout.scss

%menu-panel {
  position: absolute;
  overflow: hidden;
}
%menu-panel [type='checkbox'] {
  display: none;
}
%menu-panel [type='checkbox'] ~ * {
  transition: transform 150ms, min-height 150ms, max-height 150ms;
  min-height: 0;
}
%menu-panel [type='checkbox']:checked ~ * {
  transform: translateX(calc(-100% - 10px));
  /* this needs to autocalculate */
  /* or be hardcoded */
  /* min-height: 143px; */
}
%menu-panel [role='menuitem']::after {
  float: right;
}
%menu-panel-sub-panel {
  position: absolute;
  top: 0;
  left: calc(100% + 10px);
}
%menu-panel > ul > li > div[role='menu'] {
  @extend %menu-panel-sub-panel;
}
%menu-panel > ul > li > *:not(div[role='menu']) {
  position: relative;
}
%menu-panel:not(.left) {
  right: 0px;
  left: auto;
}
%menu-panel.left {
  left: 0px;
}
%menu-panel:not(.above) {
  top: 28px;
}
%menu-panel.above {
  bottom: 42px;
}
%menu-panel > ul {
  margin: 0;
  padding: 4px 0;
}
%menu-panel > ul,
%menu-panel > ul > li,
%menu-panel > ul > li > * {
  width: 100%;
}
%menu-panel > ul > li > * {
  text-align: left !important;
}
%menu-panel-separator {
  padding-top: 0.35em;
}
%menu-panel-separator:not(:first-child) {
  margin-top: 0.35em;
}
%menu-panel-separator:not(:empty) {
  padding-left: 1em;
  padding-right: 1em;
  padding-bottom: 0.1em;
}
%menu-panel-header {
  padding: 10px;
  padding-left: 36px;
}
/* here the !important is only needed for what seems to be a difference */
/* with the CSS before and after compression */
/* i.e. before compression this style is applied */
/* after compression it is in the source but doesn't seem to get */
/* applied (unless you add the !important) */
%menu-panel .is-active {
  position: relative !important;
}
%menu-panel .is-active > *::after {
  position: absolute;
  top: 50%;
  margin-top: -8px;
  right: 10px;
}
%menu-panel-header::before {
  position: absolute;
  left: 15px;
  top: calc(10px + 0.1em);
}
%menu-panel-header {
  max-width: fit-content;
}
@supports not (max-width: fit-content) {
  %menu-panel-header {
    max-width: 200px;
  }
}