Nav bar button styling

.Header-nav-item:nth-child(4) {
      border: 0px solid red !important;
      background-color: yellow !important;
  text-transform: uppercase !important;
      padding: 20px 30px !important;
      border-radius: 28px;
      font-size: 15px;
      color: #6599ff !important;
  }

.Header-nav-item:nth-child(4):hover, .Header-nav-item:nth-child(4):focus {
      background-color: #6599ff !important;
      color: yellow !important;
  }