Field Groups

<div class="c-field-group">
  <button class="c-button">
    <span class="c-button__label">Button A</span>
  </button>
  <button class="c-button">
    <span class="c-button__label">Button B</span>
  </button>
  <button class="c-button">
    <span class="c-button__label">Button C</span>
  </button>
</div>

<div class="c-field-group c-field-group--merged">
  <button class="c-button">
    <span class="c-button__label">Button A</span>
  </button>
  <button class="c-button">
    <span class="c-button__label">Button B</span>
  </button>
  <button class="c-button">
    <span class="c-button__label">Button C</span>
  </button>
</div>

<div
  class="c-field-group c-field-group--merged c-field-group--breadcrumbs"
>
  <button class="c-button">
    <span class="c-button__label">Button A</span>
  </button>
  <button
    type="primary"
    class="c-button c-button--primary"
  >
    <span class="c-button__label">Button B</span>
  </button>
  <button class="c-button">
    <span class="c-button__label">Button C</span>
  </button>
</div>