.customer-login-block {
  margin: 0 30px 0 0;
}
.customer-register-block {
  margin: 0 15px 0 15px;
}
.customer-info-block {
  margin: 0 0 0 30px;
}

@media only screen and (max-width: 767px){
  .customer-login-block, .customer-register-block, .customer-info-block {
    margin: 20px 0 20px 0;
  }
}