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//

// Dropdown menus

// --------------------------------------------------

// Dropdown arrow/caret

.caret {

  display: inline-block;

  width: 0;

  height: 0;

  margin-left: 2px;

  vertical-align: middle;

  border-top:   $caret-width-base dashed;

  border-top:   $caret-width-base solid \9; // IE8

  border-right: $caret-width-base solid transparent;

  border-left:  $caret-width-base solid transparent;

}

// The dropdown wrapper (div)

.dropup,

.dropdown {

  position: relative;

}

// Prevent the focus on the dropdown toggle when closing dropdowns

.dropdown-toggle:focus {

  outline: 0;

}

// The dropdown menu (ul)

.dropdown-menu {

  position: absolute;

  top: 100%;

  left: 0#{'/*rtl:auto*/'};

  z-index: $zindex-dropdown;

  display: none; // none by default, but block on "open" of the menu

  float: left;

  min-width: 160px;

  padding: 5px 0;

  margin: 2px 0 0; // override default ul

  list-style: none;

  font-size: $font-size-base;

  text-align: left; // Ensures proper alignment if parent has it changed (e.g., modal footer)

  background-color: $dropdown-bg;

  border: 1px solid $dropdown-fallback-border; // IE8 fallback

  border: 1px solid $dropdown-border;

  border-radius: $border-radius-base;

  @include box-shadow(0 6px 12px rgba(0,0,0,.175));

  background-clip: padding-box;

  // Aligns the dropdown menu to right

  //

  // Deprecated as of 3.1.0 in favor of `.dropdown-menu-[dir]`

  &.pull-right {

    right: 0;

    left: auto;

  }

  // Dividers (basically an hr) within the dropdown

  .divider {

    @include nav-divider($dropdown-divider-bg);

  }

  // Links within the dropdown menu

  > li > a {

    display: block;

    padding: 3px 20px;

    clear: both;

    font-weight: normal;

    line-height: $line-height-base;

    color: $dropdown-link-color;

    white-space: nowrap; // prevent links from randomly breaking onto new lines

  }

}

// Hover/Focus state

.dropdown-menu > li > a {

  &:hover,

  &:focus {

    text-decoration: none;

    color: $dropdown-link-hover-color;

    background-color: $dropdown-link-hover-bg;

  }

}

// Active state

.dropdown-menu > .active > a {

  &,

  &:hover,

  &:focus {

    color: $dropdown-link-active-color;

    text-decoration: none;

    outline: 0;

    background-color: $dropdown-link-active-bg;

  }

}

// Disabled state

//

// Gray out text and ensure the hover/focus state remains gray

.dropdown-menu > .disabled > a {

  &,

  &:hover,

  &:focus {

    color: $dropdown-link-disabled-color;

  }

  // Nuke hover/focus effects

  &:hover,

  &:focus {

    text-decoration: none;

    background-color: transparent;

    background-image: none; // Remove CSS gradient

    @include reset-filter;

    cursor: $cursor-disabled;

  }

}

// Open state for the dropdown

.open {

  // Show the menu

  > .dropdown-menu {

    display: block;

  }

  // Remove the outline when :focus is triggered

  > a {

    outline: 0;

  }

}

// Menu positioning

//

// Add extra class to `.dropdown-menu` to flip the alignment of the dropdown

// menu with the parent.

.dropdown-menu-right {

  left: auto; // Reset the default from `.dropdown-menu`

  right: 0;

}

// With v3, we enabled auto-flipping if you have a dropdown within a right

// aligned nav component. To enable the undoing of that, we provide an override

// to restore the default dropdown menu alignment.

//

// This is only for left-aligning a dropdown menu within a `.navbar-right` or

// `.pull-right` nav component.

.dropdown-menu-left {

  left: 0;

  right: auto;

}

// Dropdown section headers

.dropdown-header {

  display: block;

  padding: 3px 20px;

  font-size: $font-size-small;

  line-height: $line-height-base;

  color: $dropdown-header-color;

  white-space: nowrap; // as with > li > a

}

// Backdrop to catch body clicks on mobile, etc.

.dropdown-backdrop {

  position: fixed;

  left: 0;

  right: 0;

  bottom: 0;

  top: 0;

  z-index: ($zindex-dropdown - 10);

}

// Right aligned dropdowns

.pull-right > .dropdown-menu {

  right: 0;

  left: auto;

}

// Allow for dropdowns to go bottom up (aka, dropup-menu)

//

// Just add .dropup after the standard .dropdown class and you're set, bro.

// TODO: abstract this so that the navbar fixed styles are not placed here?

.dropup,

.navbar-fixed-bottom .dropdown {

  // Reverse the caret

  .caret {

    border-top: 0;

    border-bottom: $caret-width-base dashed;

    border-bottom: $caret-width-base solid \9; // IE8

    content: "";

  }

  // Different positioning for bottom up menu

  .dropdown-menu {

    top: auto;

    bottom: 100%;

    margin-bottom: 2px;

  }

}

// Component alignment

//

// Reiterate per navbar.less and the modified component alignment there.

@media (min-width: $grid-float-breakpoint) {

  .navbar-right {

    .dropdown-menu {

      right: 0; left: auto;

    }

    // Necessary for overrides of the default right aligned menu.

    // Will remove come v4 in all likelihood.

    .dropdown-menu-left {

      left: 0; right: auto;

    }

  }

}