admin/view/stylesheet/sass/bootstrap/_navbar.scss

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//
// Navbars
// --------------------------------------------------


// Wrapper and base class
//
// Provide a static navbar from which we expand to create full-width, fixed, and
// other navbar variations.

.navbar {
  position: relative;
  min-height: $navbar-height; // Ensure a navbar always shows (e.g., without a .navbar-brand in collapsed mode)
  margin-bottom: $navbar-margin-bottom;
  border: 1px solid transparent;

  // Prevent floats from breaking the navbar
  @include clearfix;

  @media (min-width: $grid-float-breakpoint) {
    border-radius: $navbar-border-radius;
  }
}


// Navbar heading
//
// Groups `.navbar-brand` and `.navbar-toggle` into a single component for easy
// styling of responsive aspects.

.navbar-header {
  @include clearfix;

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


// Navbar collapse (body)
//
// Group your navbar content into this for easy collapsing and expanding across
// various device sizes. By default, this content is collapsed when <768px, but
// will expand past that for a horizontal display.
//
// To start (on mobile devices) the navbar links, forms, and buttons are stacked
// vertically and include a `max-height` to overflow in case you have too much
// content for the user's viewport.

.navbar-collapse {
  overflow-x: visible;
  padding-right: $navbar-padding-horizontal;
  padding-left:  $navbar-padding-horizontal;
  border-top: 1px solid transparent;
  box-shadow: inset 0 1px 0 rgba(255,255,255,.1);
  @include clearfix;
  -webkit-overflow-scrolling: touch;

  &.in {
    overflow-y: auto;