/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(1.5rem);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

/* WhatsApp floating button */
.wts-float {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: calc(var(--z-backtop) + 1);
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: #25d366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.35);
  transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
}

.wts-float:hover,
.wts-float:focus-visible {
  background: #1ebe57;
  color: #fff;
  transform: translateY(-2px) scale(1.04);
  box-shadow: 0 10px 28px rgba(37, 211, 102, 0.45);
}

.wts-float svg {
  width: 1.65rem;
  height: 1.65rem;
  fill: currentColor;
}

/* Back to top — sits above WhatsApp button */
.back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 5rem;
  z-index: var(--z-backtop);
  width: 2.75rem;
  height: 2.75rem;
  border: 1px solid var(--color-border);
  background: var(--color-pearl);
  color: var(--color-charcoal);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.5rem);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background var(--transition);
  box-shadow: var(--shadow-soft);
}

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

.back-to-top:hover {
  background: var(--color-rose);
  color: var(--color-white);
  border-color: var(--color-rose);
}

.back-to-top svg {
  width: 1rem;
  height: 1rem;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .gallery-item img,
  .nav-mobile,
  .btn,
  .back-to-top,
  .wts-float {
    transition: none;
  }

  .wts-float:hover,
  .wts-float:focus-visible {
    transform: none;
  }
}