/* ============ BACK TO TOP BUTTON ============
   Fixed, circular button that appears once the page has been
   scrolled down AND the page is actually scrollable. Sits above
   the floating WhatsApp button so the two never overlap. */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 96px;
  z-index: 998;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  border-radius: 50%;
  background: #0f2038;
  color: #fff;
  cursor: pointer;
  box-shadow: 0 8px 22px rgba(15, 32, 56, 0.28);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity .25s ease, transform .25s ease, visibility .25s ease, background .2s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover,
.back-to-top:focus-visible {
  background: var(--sun, #d9a94e);
  color: #0f2038;
}

.back-to-top:focus-visible {
  outline: 2px solid var(--sun, #d9a94e);
  outline-offset: 3px;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

/* Screen-reader-only label (kept translatable via data-i18n) */
.back-to-top .visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 600px) {
  .back-to-top {
    right: 16px;
    bottom: 84px;
    width: 42px;
    height: 42px;
  }
  .back-to-top svg {
    width: 18px;
    height: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: opacity .15s linear, visibility .15s linear;
    transform: none;
  }
}