metamask-extension/ui/components/app/transaction-detail/index.scss

.transaction-detail {
  position: relative;

  .transaction-detail-edit {
    text-align: end;
    padding-top: 20px;

    button {
      @include H7;

      color: $primary-1;
      background: transparent;
      border: 0;
      padding-inline-end: 0;
      text-transform: uppercase;
    }
  }

  &-rows &-item:first-child {
    padding-top: 0;
  }

  &-item {
    padding: 20px 0;
    border-bottom: 1px solid $ui-3;

    &:first-child {
      padding-top: 0;
    }

    &:last-child {
      padding-bottom: 0;
      border-bottom: 0;
    }
  }
}