/* --- FLOATING WHATSAPP --- */
.floating-whatsapp {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #25D366;
  border-radius: 50%;
  box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
  z-index: var(--z-overlay);
  transition: transform var(--transition-spring), box-shadow var(--transition-base);
  animation: whatsappPulse 2s ease infinite;
}

.floating-whatsapp svg {
  width: 30px;
  height: 30px;
  fill: var(--color-white);
}

.floating-whatsapp:hover {
  transform: scale(1.15);
  box-shadow: 0 6px 25px rgba(37, 211, 102, 0.5);
}

.floating-whatsapp-tooltip {
  position: absolute;
  right: 70px;
  background: var(--color-primary-dark);
  color: var(--color-white);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.floating-whatsapp:hover .floating-whatsapp-tooltip {
  opacity: 1;
}

@keyframes whatsappPulse {
  0%, 100% { box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4); }
  50% { box-shadow: 0 4px 30px rgba(37, 211, 102, 0.6), 0 0 0 10px rgba(37, 211, 102, 0.1); }
}

/* --- BACK TO TOP --- */
.back-to-top {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-24, 100px);
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  z-index: var(--z-overlay);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

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

.back-to-top:hover {
  background: var(--color-primary-light);
  transform: translateY(-3px);
}

.back-to-top svg {
  stroke: var(--color-white);
  fill: none;
  stroke-width: 2;
}

/* --- LIGHTBOX --- */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.95);
  z-index: var(--z-modal);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox-img {
  max-width: 90vw;
  max-height: 80vh;
  object-fit: contain;
  border-radius: var(--radius-md);
  transform: scale(0.9);
  transition: transform var(--transition-base);
}

.lightbox.active .lightbox-img {
  transform: scale(1);
}

.lightbox-close,
.lightbox-prev,
.lightbox-next {
  position: absolute;
  color: var(--color-white);
  font-size: 2rem;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border-radius: 50%;
  transition: background var(--transition-fast);
  z-index: 1;
}

.lightbox-close { top: var(--space-5); right: var(--space-5); }
.lightbox-prev { left: var(--space-5); top: 50%; transform: translateY(-50%); }
.lightbox-next { right: var(--space-5); top: 50%; transform: translateY(-50%); }

.lightbox-close:hover,
.lightbox-prev:hover,
.lightbox-next:hover {
  background: rgba(255,255,255,0.2);
}

.lightbox-caption {
  position: absolute;
  bottom: var(--space-6);
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.7);
  font-size: var(--text-sm);
  text-align: center;
}

/* ============================================
   MOBILE RESPONSIVE STYLES
   ============================================ */