Dropdown: Centered List

$dropdown-raw-gap: spacing(space-16); // gap used to separate button to dropdown list

.c-dropdown {
  position: relative;
  max-width: remify(340px);
  display: inline-block;
}

.c-dropdown__label {
  @include font-scale(level-3, $font-secondary, regular);
}

.c-dropdown__button {
  @include font-scale(level-3, $font-secondary, regular);
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  background-color: useHSL(--base-100);
  width: 100%;
  border: 0;
  box-sizing: border-box;
  padding: spacing(space-16) spacing(space-24);
  overflow: hidden;
  color: useHSL(--primary-100);
  cursor: pointer;
  box-shadow: inset 0px 0 0px remify(1px) useHSL(--primary-100);
}

.c-dropdown__button:focus,
.c-dropdown__button:focus-within, 
.c-dropdown__button:active {
  outline: 0px solid transparent;
  box-shadow: inset 0px 0 0px remify(1px) useHSL(--highlight-100);

  .c-dropdown__list {
    opacity: 1;
    visibility: visible;
  }

}

.c-dropdown__button-icon {
  margin-left: spacing(space-8);
}

.c-dropdown__button:hover {
  
  .c-dropdown__button-icon {
    color: useHSL(--accent-100);
  }

}

.c-dropdown__list {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: useHSL(--base-100);
  width: remify(340px);
  @include shadow(level-500);
  text-align: left;
  display: none;
  list-style: none;
  // max-height: remify(230px);
  overflow-y: scroll;
  z-index: $zIndex-dropdown-list;
  
  // Styles when dropdown opens in off-canvas nav
  .c-nav--off-canvas & {
    position: relative;
    top: 0;
    left: 0;
    width: 100vw;
    box-shadow: none;
    text-align: left;
    max-height: initial;
    overflow-y: initial;
    margin-left: -#{spacing(space-16)};
  }

}

.c-dropdown.is-open {

  .c-dropdown__list {
    display: block;
  }

  .c-dropdown__button-icon {
    transform: rotate(180deg);
    color: useHSL(--accent-100);
  }

}

.c-dropdown__list-item {
  z-index: 1;
  position: relative;
  color: useHSL(--primary-100);
}

.c-dropdown__link {
  display: block;
  padding: spacing(space-16) spacing(space-24);
  color: inherit;
  text-decoration: none;
  background-color: useHSL(--base-100);
  @include font-scale(level-3, $font-secondary, regular);

  // Styles when dropdown opens in off-canvas nav
  .c-nav--off-canvas & {
    background-color: useHSL(--grey);
    padding: spacing(space-16);
  }

}

.c-dropdown__link:hover {
  background-color: useHSL(--geyser-blue);
}

.c-dropdown__link:focus,
.c-dropdown__link.is-active {
  background-color: useHSL(--primary-100);
  color: useHSL(--base-100);

  // Styles when dropdown opens in off-canvas nav
  .c-nav--off-canvas & {
    background-color: useHSL(--accent-100);
  }

}

/*------------------------------------*
  Raw modifier
*------------------------------------*/
.c-dropdown--raw {
 
  .c-dropdown__button {
    justify-content: initial;
    background-color: transparent;
    box-shadow: none;
    padding: 0;
    font-family: inherit;
  }

  .c-dropdown__button:focus,
  .c-dropdown__button:focus-within, 
  .c-dropdown__button:active {
    @include outline;
  }

  .c-dropdown__list {
    margin-top: $dropdown-raw-gap;
  }
  
}

/*------------------------------------*
  Centered-list modifier
*------------------------------------*/
.c-dropdown--centered-list {
 
  .c-dropdown__list {
    left: 50%;
    transform: translateX(-50%);
    
    // Styles when dropdown opens in off-canvas nav
  .c-nav--off-canvas & {
    left: 0;
    transform: initial;
  }

  }
  
}

/*------------------------------------*
  Nav modifier
*------------------------------------*/
.c-dropdown--nav {

  .c-dropdown__button {
    @extend .c-nav__link;
  }

}

/*------------------------------------*
  No-js version for progressive enhancement
*------------------------------------*/
.no-js {

  .c-dropdown:hover .c-dropdown__list,
  .c-dropdown__button:focus ~ .c-dropdown__list,
  .c-dropdown__button:active ~ .c-dropdown__list {
    display: block;
  }

  .c-dropdown--raw {
    .c-dropdown__button::after {
      content: '';
      display: block;
      width: 100%;
      height: calc(100% + $dropdown-raw-gap);
      background-color: transparent;
      position: absolute;
      top: 0;
      left: 0;
    }
  }

}