<div class="truck">
  <div class="truck__body">
    <div class="truck__body truck__body--top">
      <div class="truck__window">
        <div class="truck__window-glass"></div>
      </div>
    </div>
    <div class="truck__body truck__body--mid">
      <div class="truck__mid-body"></div>
    </div>
    <div class="truck__body truck__body--bottom">
      <div class="truck__underpanel"></div>
      <div class="truck__rear-bumper"></div>
      <div class="truck__side-skirt"></div>
    </div>
  </div>
  <div c