.ebook-btn{
  font-weight: 700;
  font-size:16px;
}

@media screen and (max-width: 900px){
  .ebook-col:not(:first-child){
    margin-top:40px;
  }
}
.ebook-btn{
  line-height: 34px;
}

@media screen and (max-width:768px){
  .ebook-col{
    text-align: center;
  }
}