/* The ordinary anchor remains available at the page end without JavaScript. */
#eb-sample .back-to-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 52px;
  min-height: 52px;
  margin: 18px auto;
  border: 1px solid #c2538f;
  border-radius: 50%;
  background: #fff5fb;
  color: #8c3c66;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  line-height: 1.3;
}
#eb-sample .back-to-top > span:first-child { font-size: 20px; line-height: 1; }
#eb-sample .back-to-top.is-enhanced {
  position: fixed;
  z-index: 20;
  right: max(16px, env(safe-area-inset-right));
  bottom: calc(16px + env(safe-area-inset-bottom));
  margin: 0;
  box-shadow: 0 3px 12px #6f3a5826;
}
#eb-sample .back-to-top[hidden] { display: none; }
#eb-sample .back-to-top:hover { background: #f6d4e5; }
#eb-sample .back-to-top:focus-visible { outline: 3px solid #c2538f; outline-offset: 4px; }
/* Keep the copyright clear of the floating control at the page end. */
#eb-sample:has(.back-to-top.is-enhanced) footer {
  padding-bottom: calc(44px + env(safe-area-inset-bottom));
}
@media (max-width: 560px) {
  #eb-sample .back-to-top { width: 48px; min-height: 48px; font-size: 9px; }
  #eb-sample .back-to-top.is-enhanced { right: max(12px, env(safe-area-inset-right)); bottom: calc(12px + env(safe-area-inset-bottom)); }
}