.btnBlock {
  display: flex;
  margin-top: 12px;
}

.mrb {
  margin-right: 15px;
}



@media screen and (max-width: 768px) {
  .btnBlock {
    display: block;
  }
  .mrb {
    margin-right: 0;
    margin-bottom: 15px;
  }
}