.parent-column {
  width: 100%;
}
.parent-column:nth-of-type(2) {
  margin-left: 35px;
}

@media screen and (max-width: 677px) {
  .parent-column {
    width: 100%;
  }
  .parent-column:nth-of-type(2) {
    margin-left: 0;
  }
}