<div className="c-overlay relative">
  <div className="c-overlay__inner relative">
    <div className="c-overlay__header">
      <div className="c-overlay__title">
        <h1>Overlay</h1>
      </div>
      <button className="c-overlay__close">
        <FontAwesomeIcon className="align-middle" icon={faTimes}/>
      </button>
    </div>
    <div className="c-overlay__content">
      <div className="c-box mb-0">
          <div className="c-box__header">Box title</div>
          <div className="p-5">This is an overlay</div>
        </div>
    </div>
  </div>
</div>