/* === Botón Flotante Scroll to Top === */
.scroll-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
  width: 3.5rem;
  height: 3.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #6B7F59 0%, #8C8557 100%);
  border: 2px solid rgba(232, 226, 213, 0.3);
  border-radius: 50%;
  box-shadow: 0 8px 24px rgba(107, 127, 89, 0.4);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.8);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.scroll-to-top:hover {
  background: linear-gradient(135deg, #7A8E68 0%, #9A9567 100%);
  border-color: rgba(232, 226, 213, 0.5);
  box-shadow: 0 12px 36px rgba(107, 127, 89, 0.6);
  transform: translateY(-5px) scale(1.05);
}

.scroll-to-top:active {
  transform: translateY(-2px) scale(0.98);
}

.scroll-to-top svg {
  width: 1.75rem;
  height: 1.75rem;
  color: #F8F6F2;
  stroke-width: 2.5;
  filter: drop-shadow(0 2px 6px rgba(0, 0, 0, 0.4));
  margin: 0 auto;
  display: block;
}

/* Animación de pulsación sutil */
@keyframes scrollTopPulse {
  0%, 100% {
    box-shadow: 0 8px 24px rgba(107, 127, 89, 0.4);
  }
  50% {
    box-shadow: 0 8px 24px rgba(107, 127, 89, 0.4), 0 0 0 8px rgba(107, 127, 89, 0.15);
  }
}

.scroll-to-top.visible {
  animation: scrollTopPulse 3s ease-in-out infinite;
}

.scroll-to-top:hover {
  animation: none;
}

/* Responsive */
@media (max-width: 767px) {
  .scroll-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 3rem;
    height: 3rem;
  }
  
  .scroll-to-top svg {
    width: 1.5rem;
    height: 1.5rem;
    stroke-width: 2.5;
  }
}