form {
  display: flex;
  justify-content: space-around;
}
.row {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.col-half {
  display: flex;
  justify-content: center;
}
.col,
.col-half {
  width: 100%;
}
.hidden {
  display: none;
}
.half {
  width: 50%;
}
.column {
  display: flex;
  flex-direction: column;
}
.image-div {
  width: 80%
}
@media only screen and (min-width: 540px) {
  .col-half {
    width: 50%;
  }
}
@media only screen and (min-width: 1024px) {
  .col-half {
    width: calc(100% / 3)
  }
}