.chunk { display:none; margin-bottom:20px; }

#nextBtnWrap { text-align:center; margin:1.5rem 0; }

#nextBtn {
  width:2.8rem; height:2.8rem; border-radius:50%;
  border:2px solid #555; background:white;
  display:inline-flex; align-items:center; justify-content:center;
  cursor:pointer; padding:0;
}