Button group

<div class="env-button-group" role="group">
   <button type="button" class="env-button">Default</button>

   <button type="button" class="env-button env-button--primary">Primary</button>

   <button type="button" class="env-button env-button--success">Success</button>

   <button type="button" class="env-button env-button--danger">Danger</button>
</div>