.pbc-btn-disable{
  background: #f8e93d;  /* fallback for old browsers */
  background: -webkit-linear-gradient(to bottom, #383838, #D3D3D3);  /* Chrome 10-25, Safari 5.1-6 */
  background: linear-gradient(to bottom, #383838, #D3D3D3); /* W3C, IE 10+/ Edge, Firefox 16+, Chrome 26+, Opera 12+, Safari 7+ */
  color: rgba(0,0,0,1) !important;
  border-radius: 10px;
  border: 2px solid #000;
  position: relative;
  line-height: 42px;
  font-weight: 900;
  font-size: 18px;
  height: 45px;
  text-align: center;
  letter-spacing: 0;
}