.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 40;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,.14);
  background: #2f3a2c;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(0,0,0,.22);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity .3s, visibility .3s, transform .3s, background .2s;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { background: #5f7356; transform: translateY(-3px); }
.back-to-top:focus-visible { outline: 2px solid #8fa585; outline-offset: 3px; }
.back-to-top svg { display: block; }
@media (max-width: 560px) {
  .back-to-top { right: 16px; bottom: 16px; width: 44px; height: 44px; }
}
@media (prefers-reduced-motion: reduce) {
  .back-to-top, .back-to-top:hover { transition: opacity .2s; transform: none; }
}
@media (max-width: 560px) {
  .cookie-open .back-to-top { opacity: 0; visibility: hidden; }
}