index.css

.k-link-field .k-button-group {
  margin: 0;
  display: flex;
  flex-direction: row;
  align-items: stretch; }
  .k-link-field .k-button-group .k-button {
    line-height: 1.25rem;
    padding: .5rem;
    border-right: 1px solid #ccc;
    flex: 1; }
    .k-link-field .k-button-group .k-button:last-child {
      border-right: 0; }
    .k-link-field .k-button-group .k-button .k-button-text {
      line-height: 1rem; }