discourse/plugins/poll/assets/stylesheets/desktop/poll-ui-builder.scss

.poll-ui-builder.modal {
  .poll-number {
    margin-right: 10px;

    &:last-of-type {
      margin-right: 0;
    }
  }

  .options {
    display: flex;
    justify-content: space-between;
  }
  .column {
    display: inline-block;
    width: calc(50% - 10px);
  }

  .d-editor-preview {
    margin-top: 5px;
    padding-top: 5px;
    border-top: 1px solid var(--primary-low);
  }
}