startbootstrap/_sass/_navigation.scss

.sb-navbar {

  .navbar-brand {
    font-size: 1.15rem;
    font-weight: 700;
    img {
      height: 3.5rem;
    }
  }

  .navbar-toggler {
    color: $gray-900;
    border: 0;
    padding: 1rem;
    &:focus {
      outline: none;
    }
    &:active {
      color: fade-out($gray-900, 0.5);
    }
  }

  .navbar-nav {
    .nav-item {
      .nav-link {
        font-weight: 700;
        letter-spacing: 0.05rem;
        text-transform: uppercase;
        font-size: 0.8rem;
        line-height: 0.8rem;
        padding: 1rem 0;
        i {
          font-size: 0.9rem;
        }
      }
    }
    .dropdown-menu {
      font-size: 0.85rem;
      .dropdown-header {
        font-size: 0.75rem;
      }
    }
  }

  .tooltip {
    display: none;
  }

  @include media-breakpoint-up(lg) {
    .tooltip {
      display: block;
    }
    .navbar-nav {
      padding-top: 0;
      padding-bottom: 0;
      .nav-item {
        .nav-link {
          padding: 1rem 0.5rem;
          margin-bottom: 0;
        }
        .dropdown-menu {
          top: 50px;
        }
      }
    }
    .dropdown-templates,
    .dropdown-themes {
      padding: 0;
      overflow: hidden;
      left: -212px;
      .dropdown-item {
        border-radius: 0 !important;
      }
      .dropdown-themes-callout {
        width: 20rem;
        .btn-xl {
          font-size: 0.6rem;
          padding: 0.75rem 1rem;
        }
        h5 {
          margin-bottom: 0.25rem;
        }
        p {
          margin-bottom: 2rem;
          font-size: 0.85rem;
          color: fade-out($white, 0.15);
        }
      }
    }
    .dropdown-themes {
      .dropdown-themes-callout {
        background: linear-gradient(to bottom, #{fade-out($black, .5)} 0%,#{fade-out($black, .3)} 75%,$black 100%), url('/assets/img/bg-navbar-dropdown-themes.png');
        background-position: center;
        background-size: cover;
      }
      .dropdown-item:active {
        background-color: $red;
      }
    }
    .dropdown-templates {
      .dropdown-themes-callout {
        background: linear-gradient(to bottom, #{fade-out($black, .5)} 0%,#{fade-out($black, .3)} 75%,$black 100%), url('/assets/img/bg-navbar-dropdown-templates.png');
        background-position: center;
        background-size: cover;
      }
      .dropdown-item:active {
        background-color: $blue;
      }
    }
  }

}