x; bottom: -10px;" data-offset-y="35">
    <div class="inner"></div>
  </div>
</div>

<!-- No overflow, centered in IMCB. -->
<div class="container">
  <div class="item rtl" style="top: -20px; bottom: -10px;" data-offset-y="-15">
    <div class="inner" style="height: 120px;"></div>
  </div>
</div>

<!-- Overflows strong CB edge, shifted. -->
<div class="container">
  <div class="item rtl" style="top: -20px; bottom: -10px;" data-offset-y="-20">
    <div class="inner" style="height: 160px;"></div>
  </div>
</