.back-to-top {
  position: fixed;
  z-index: 150;
  right: calc(20px + env(safe-area-inset-right, 0px));
  bottom: calc(22px + env(safe-area-inset-bottom, 0px));
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  padding: 0;
  border: 1px solid #72e5d8;
  border-radius: 50%;
  background: #102a2f;
  color: #a3fff0;
  box-shadow: 0 8px 28px rgb(0 0 0 / 25%);
  font: 700 30px / 1 Manrope, sans-serif;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
}
.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  background: #1d454b;
}
.back-to-top:focus-visible {
  outline: 3px solid #59e4cb;
  outline-offset: 3px;
}
@media (max-width: 650px) {
  .back-to-top {
    right: calc(15px + env(safe-area-inset-right, 0px));
    bottom: calc(17px + env(safe-area-inset-bottom, 0px));
    width: 46px;
    height: 46px;
    font-size: 27px;
  }
}
@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: none;
  }
}