.scroll-top {
  position: fixed;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  z-index: 30;
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 1px solid var(--control-border);
  border-radius: 50%;
  background: var(--blue-strong);
  color: #fff;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 4px 14px #0003;
}
.scroll-top[hidden] {
  display: none;
}
.scroll-top:hover {
  background: var(--ink);
  color: var(--surface);
}