/* Botão flutuante "voltar ao topo": some até o scroll ser ativado. */
.pl-to-top {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 90;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  /* Vermelho da marca, como o botão principal da home. */
  border: 0;
  background: var(--gradient-action);
  color: var(--color-on-hover);
  display: grid;
  place-items: center;
  box-shadow: 0 6px 16px var(--color-hover-shadow);
  cursor: pointer;
  padding: 0;
  /* Saída (estado base): 160ms e deslocamento curto; a entrada é um pouco mais longa. */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(6px);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out), visibility 0s linear var(--dur-fast), box-shadow .2s;
}

.pl-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out), visibility 0s, box-shadow .2s;
}

.pl-to-top:active {
  transform: scale(.97);
}

.pl-to-top svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@media (hover: hover) {
  .pl-to-top:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px var(--color-hover-shadow);
  }

  .pl-to-top:hover:active {
    transform: scale(.97);
  }
}

@media (max-width: 767px) {
  .pl-to-top {
    right: 14px;
    bottom: 14px;
    width: 40px;
    height: 40px;
  }
}

@media print {
  .pl-to-top {
    display: none;
  }
}