.back-to-top {
  background: transparent;
  bottom: 28px;
  color: #1f375d;
  height: 48px;
  opacity: 0;
  padding: 9px;
  right: clamp(22px, 6.25vw, 90px);
  transition:
    color 0.3s ease,
    opacity 0.25s ease,
    transform 0.25s ease,
    visibility 0.25s ease;
  visibility: hidden;
  width: 48px;
  z-index: 997;
}

.back-to-top[data-tone="plum"] {
  color: #8b4b8b;
}

.back-to-top[data-active="true"] {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

.back-to-top:focus-visible {
  border-radius: 50%;
  outline: 2px solid currentColor;
  outline-offset: 3px;
}

@media (hover: hover) and (pointer: fine) {
  .back-to-top[data-active="true"]:hover {
    transform: translateY(-3px);
  }
}

@media (width <= 767px) {
  .back-to-top {
    bottom: 18px;
    right: 18px;
  }
}