.left-column {
  display: inline-block;
  vertical-align: top;
}

.center-column {
  display: inline-block;
  min-width: 640px;
}

.right-column {
  margin-top: 0;
  margin-left: 85px;
  display: inline-block;
  vertical-align: top;
  width: 230px;
}