.bb {
      display: inline-block;
      position: relative;
      text-decoration: none;
      text-align: center;
    }

    .bb:hover:before {
      content: '';
      width: 100%;
      height: 7%;
      position: absolute;
      left: 0;
      bottom: 0;
      box-shadow: inset 0 -10px 0 #0a58cae1;
    }

    .arrow {
      border: solid black;
      border-width: 0 3px 3px 0;
      display: inline-block;
      padding: 3px;
    }

    .right {
      transform: rotate(-45deg);
      -webkit-transform: rotate(-45deg);
    }