// Dropdown arrow/caret
.caret {
    display: inline-block;
    width: 0;
    height: 0;
    margin-left: 2px;
    vertical-align: middle;
    border-top:   @caret-width-base solid;
    border-right: @caret-width-base solid transparent;
    border-left:  @caret-width-base solid transparent;
}

// The dropdown wrapper (div)
.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;
    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;
    background-color: @dropdown-bg;
    border: 1px solid @dropdown-fallback-border; // IE8 fallback
    border: 1px solid @dropdown-border;
    .border-radius(@border-radius-base);
    .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 {
        height: 1px;
        margin: ((@line-height-computed / 2) - 1) 0;
        overflow: hidden;
        background-color: @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
.dropdown-menu > .disabled > a {
    &:hover,
    &:focus {
        text-decoration: none;
        background-color: transparent;
        background-image: none; // Remove CSS gradient
        filter: e(%("progid:DXImageTransform.Microsoft.gradient(enabled = false)"));
        cursor: not-allowed;
    }
}

// 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.
//
.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;
}

// 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.

.dropup {
    // Reverse the caret
    .caret {
        border-top: 0;
        border-bottom: @caret-width-base solid;
        content: "";
    }
    // Different positioning for bottom up menu
    .dropdown-menu {
        top: auto;
        bottom: 100%;
        margin-bottom: 1px;
    }
}

