.bh-back-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 990;
  width: 54px;
  height: 54px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1px;
  border: 1px solid rgba(255,255,255,.7);
  border-radius: 50%;
  background: #1e6546;
  color: #fff;
  box-shadow: 0 3px 12px rgba(18,58,43,.22);
  font: 700 11px/1.15 sans-serif;
  cursor: pointer;
}
.bh-back-to-top span { font-size: 19px; }
.bh-back-to-top:hover { background: #123a2b; }
.bh-back-to-top:focus-visible { outline: 3px solid #e18d31; outline-offset: 3px; }
@media (max-width: 834px) {
  .bh-back-to-top { right: 14px; bottom: calc(78px + env(safe-area-inset-bottom)); width: 48px; height: 48px; }
}