File: engine/modules/contrib/foundation/source/scss/components/_accordion-menu.scss

////
/// @group accordion-menu
////

/// Sets if accordion menus have the default arrow styles.
/// @type Boolean
$accordionmenu-arrows: true !default;

/// Sets accordion menu arrow color if arrow is used.
/// @type Color
$accordionmenu-arrow-color: $primary-color !default;

/// Sets accordion menu arrow size if arrow is used.
/// @type Length
$accordionmenu-arrow-size: 6px !default;

@mixin foundation-accordion-menu {
  @if $accordionmenu-arrows {
    .is-accordion-submenu-parent > a {
      position: relative;

      &::after {
        @include css-triangle($accordionmenu-arrow-size, $accordionmenu-arrow-color, down);
        position: absolute;
        top: 50%;
        margin-top: -1 * ($accordionmenu-arrow-size / 2);
        #{$global-right}: 1rem;
      }
    }

    .is-accordion-submenu-parent[aria-expanded='true'] > a::after {
      transform: rotate(180deg);
      transform-origin: 50% 50%;
    }
  }
}