@use "../../core/mixin";
@use "../../core/abstract";

/*
---
name: .c-dropdown
category:
  - object/component
  - object/component/dropdown
---
Dropdown component

### html
```html
<div style="min-height: 200px; position: relative">
  <nav id="my-dropdown" class="c-dropdown" role="navigation" aria-hidden="true" aria-labelledby="my-dropdown-btn">
    <div class="c-dropdown__inner">
      <ul class="c-dropdown__menu">
        <li class="c-dropdown__item">
          <div class="c-hamburger-btn" role="button" aria-expanded="false" aria-controls="my-dropdown">
            <div class="c-hamburger-btn__bars">
              <div class="c-hamburger-btn__bar"></div>
              <div class="c-hamburger-btn__bar"></div>
              <div class="c-hamburger-btn__bar"></div>
            </div>
            <div class="c-hamburger-btn__label">MENU</div>
          </div>
        </li>
        <li class="c-dropdown__item"><a href="#">menu</a></li>
        <li class="c-dropdown__item"><a href="#">menu</a></li>
        <li class="c-dropdown__item c-dropdown__item--has-submenu">
          <a href="#">menu</a>
          <button class="c-dropdown__toggle" aria-expanded="false">
            <span class="c-ic-angle-right" aria-hidden="true"></span>
          </button>
          <ul class="c-dropdown__submenu" aria-hidden="true">
            <li class="c-dropdown__subitem"><a href="#">submenu</a></li>
            <li class="c-dropdown__subitem"><a href="#">submenu</a></li>
          </ul>
        </li>
      </ul>
    </div>
  </nav>
</div>

<button id="my-dropdown-btn" class="c-hamburger-btn" aria-expanded="false" aria-controls="my-dropdown">
  <span class="c-hamburger-btn__bars">
    <span class="c-hamburger-btn__bar"></span>
    <span class="c-hamburger-btn__bar"></span>
    <span class="c-hamburger-btn__bar"></span>
  </span>
  <span class="c-hamburger-btn__label">MENU</span>
</button>
```
*/

.c-dropdown {
  @include abstract.dropdown();
}

.c-dropdown {
  @include mixin.transition(bottom, visibility);
  transition-timing-function: ease-in;

  &[aria-hidden="false"] {
    @include mixin.transition(bottom);
    transition-timing-function: ease-out;
  }

  &__menu,
  &__submenu {
    @include mixin.list-unstyled();

    > *:not(:first-child) {
      margin-top: var(--_margin-1);
    }
  }

  &__item,
  &__subitem {
    position: relative;
    overflow: hidden;

    &--has-submenu {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;

      > * {
        flex: 1 1 auto;
      }

      > a {
        padding-right: var(--_padding-1);
        max-width: calc(100% - 42px);
      }

      > .c-dropdown__toggle {
        flex: 0 0 auto;
        width: 42px;
        overflow: hidden;
      }

      > .c-dropdown__submenu {
        flex: 1 1 100%;
      }
    }
  }

  &__submenu {
    margin-top: var(--_margin-1);
    margin-left: var(--_margin-1);

    &[aria-hidden="true"] {
      display: none;
      visibility: hidden;
    }
  }

  &__toggle {
    display: flex;
    align-items: center;
    justify-content: center;

    > .c-ic-angle-right {
      transform: translateY(0);
    }
  }

  &--fixed {
    position: fixed;
  }
}