.subsite-border-columns {
  display: flex !important;
  align-items: stretch !important;
}

.subsite-border-columns .wp-block-column {
  display: flex !important;
  flex-direction: column !important;
  justify-content: stretch !important;
}

.subsite-border-columns .wp-block-column > * {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

@media (max-width: 781px) {
  .subsite-border-columns .wp-block-column > * {
    text-align: center !important;
  }
}