GenomeDB/mydata/themes/hardwood/build/scss/_main_header.scss

// Main Header Component
.main-header {
  background-color: #fff;
  border-top: 6px solid theme-color(success);
  box-shadow: 0 2px 3px rgba(#000, .125);

  .nav-link {
    padding: 1rem .4rem;
  }

  .nav-item {
    margin: 0!important;
  }

  .logo-icon {
    font-size: 30px;
    display: block;
    float: left;
    color: theme-color(success);
    height: 48px;
    line-height: 48px;
    border: 2px solid theme-color(success);
    padding: 0 5px;
    border-radius: $border-radius;
    @include media-breakpoint-down(xs) {
      height: 40px;
      line-height: 40px;
      font-size: 24px;
    }
  }

  .logo-wrapper {
    margin-left: 50px;
  }

  .logo-text {
    //letter-spacing: 2px;
    font-weight: bold;
    @include media-breakpoint-down(xs) {
      margin-top: 7px;
      display: inline-block;
    }
  }

  .dropdown-menu {
    min-width: 200px;
    @include media-breakpoint-up(lg) {
      max-height: 500px;
      overflow: auto;
    }
  }

  .dropdown.open > .dropdown-menu {
    display: block;
  }

  > .container {
    @include media-breakpoint-down(xs) {
      margin: 0 5px;
    }
  }

  .navbar-toggler {
    margin-top: 8px;
    @include media-breakpoint-down(xs) {
      margin-top: 4px;
    }
  }
}

.admin-menu-position-fixed {
  z-index: 999999!important;
}

[class*="navbar-toggleable"] {
  @include media-breakpoint-down(md) {
    > .navbar-nav {
      position: relative;
      width: 100%;
      display: block;
      float: none!important;
      .nav-item {
        display: block;
        float: none;
      }
    }
  }
}