// Animenu
// -------

// Variables
$baseMenuBackground: #0b2341; // Base color theme
$secondaryMenuBackground: #022a5c; // Secondary color (highlights, triangles...)
$gutter: 18px; // Base gutter

// Latest CSS box model
*,
*:after,
*:before {
  box-sizing: border-box;
}

// The classic hamburger icon
// <button class="animenu__btn">
//   <span class="animenu__btn__bar"></span>
//   <span class="animenu__btn__bar"></span>
//   <span class="animenu__btn__bar"></span>
// </button>
.animenu__btn {
  display: none;
  cursor: pointer;
  background-color: $baseMenuBackground;
  border: 0;
  padding: 10px;
  height: 40px;
  width: 40px;

  &:hover {
    background-color: $secondaryMenuBackground;
  }
}

.animenu__btn__bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: #fff;
  transition: 0.15s cubic-bezier(0.75, -0.55, 0.25, 1.55);

  & + .animenu__btn__bar {
    margin-top: 4px;
  }
}

.animenu__btn--active {
  .animenu__btn__bar {
    margin: 0;
    position: absolute;

    &:nth-child(1) {
      transform: rotate(45deg);
    }

    &:nth-child(2) {
      opacity: 0;
    }

    &:nth-child(3) {
      transform: rotate(-45deg);
    }
  }
}

// Clear some defaults
.animenu {
  display: block;
  ul {
    padding: 0;
    list-style: none;
    font: 0 -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto",
      "Helvetica Neue", Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji",
      "Segoe UI Symbol";
  }

  li,
  a {
    display: inline-block;
    font-size: 17px;
    font-weight: 500;
  }

  a {
    color: lighten($baseMenuBackground, 95%);
    text-decoration: none;
  }
}

// First level -> main menu items
// <nav class="animenu">
//    <ul class="animenu__nav">
//    ...
//    </ul>
//  </nav>
.animenu__nav {
  background-color: $baseMenuBackground;

  > li {
    position: relative;
    border-right: 1px solid lighten($baseMenuBackground, 12%);

    > a {
      padding: $gutter 3 * $gutter;
      text-transform: uppercase;
    }

    &:hover {
      > ul {
        opacity: 1;
        visibility: visible;
        margin: 0;
      }

      > a {
        color: #e26100;
      }
    }

    // Duplicate stuff due to
    // https://www.w3.org/TR/2018/PR-selectors-3-20180911/#grouping
    &:focus-within {
      > ul {
        opacity: 1;
        visibility: visible;
        margin: 0;
      }

      > a {
        color: #fff;
      }
    }
  }

  &__hasDropdown:before {
    content: "";
    position: absolute;
    border: 4px solid transparent;
    border-bottom: 0;
    border-top-color: currentColor;
    top: 50%;
    margin-top: -2px;
    right: 40px;
  }
}

// Second level
// <nav class="animenu">
//    <ul class="animenu__nav">
//      <li>
//        <ul class="animenu__nav__dropdown"></ul>
//      </li>
//    </ul>
//  </nav>
.animenu__nav__dropdown {
  min-width: 100%;
  position: absolute;
  top: 100%;
  left: 0;
  z-index: 1;
  opacity: 0;
  visibility: hidden;
  margin: 2 * $gutter 0 0 0;
  background-color: lighten($baseMenuBackground, 7%);
  transition: margin 0.15s, opacity 0.15s;

  > li {
    width: 100%;
    border-bottom: 1px solid lighten($baseMenuBackground, 15%);

    &:first-child > a:after {
      content: "";
      position: absolute;
      height: 0;
      width: 0;
      left: 50%;
      top: -6px;
      border: 6px solid transparent;
      border-top: 0;
      border-bottom-color: inherit;
    }

    &:last-child {
      border: 0;
    }
  }

  a {
    padding: $gutter;
    width: 100%;
    border-color: lighten($baseMenuBackground, 15%);

    &:hover {
      background-color: $secondaryMenuBackground;
      border-color: $secondaryMenuBackground;
      color: #e26100;
    }

    // Duplicate stuff due to
    // https://www.w3.org/TR/2018/PR-selectors-3-20180911/#grouping
    &:focus-within {
      background-color: $secondaryMenuBackground;
      border-color: $secondaryMenuBackground;
      color: #fff;
    }
  }
}

// The main breakpoint is 767px
// Adjust the first and second levels display
@media screen and (max-width: 767px) {
  .animenu__btn {
    display: inline-block;
  }

  .animenu__nav,
  .animenu__nav__dropdown {
    display: none;
  }

  // First level -> main menu items
  // <nav class="animenu">
  //    <ul class="animenu__nav">
  //    ...
  //    </ul>
  //  </nav>
  .animenu__nav {
    margin: $gutter 0;

    > li {
      width: 100%;
      border-right: 0;
      border-bottom: 1px solid lighten($baseMenuBackground, 25%);

      &:last-child {
        border: 0;
      }

      &:first-child > a:after {
        content: "";
        position: absolute;
        height: 0;
        width: 0;
        left: 1em;
        top: -6px;
        border: 6px solid transparent;
        border-top: 0;
        border-bottom-color: inherit;
      }

      > a {
        width: 100%;
        padding: $gutter;
        border-color: $baseMenuBackground;
        position: relative; //dropdown caret
      }
    }

    a:hover {
      background-color: $secondaryMenuBackground;
      border-color: $secondaryMenuBackground;
      color: #fff;
    }
  }

  // Second level
  // <nav class="animenu">
  //    <ul class="animenu__nav">
  //      <li>
  //        <ul class="animenu__nav__dropdown"></ul>
  //      </li>
  //    </ul>
  //  </nav>
  .animenu__nav__dropdown {
    position: static;
    background-color: lighten($baseMenuBackground, 15%);
    margin: 0;
    transition: none;
    visibility: visible;
    opacity: 1;

    > li:first-child > a:after {
      content: none;
    }

    a {
      padding-left: 2 * $gutter;
      width: 100%;
    }
  }
}

// Expanding the animenu
// <nav class="animenu">
//    <ul class="animenu__nav animenu__nav--active">
//      <li>
//        <ul class="animenu__nav__dropdown"></ul>
//      </li>
//    </ul>
//  </nav>
.animenu__nav--active {
  display: block !important;

  & .animenu__nav__dropdown {
    display: block;
  }
}