/* CSS para la flecha scroll-top */
#scroll-top-arrow {
  position: fixed;
  left: 24px;
  bottom: 32px;
  width: 48px;
  height: 48px;
  background: #3a4a7c;
  color: #fff;
  border-radius: 50%;
  box-shadow: 0 4px 24px #3a4a7c22;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 1200;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s, background 0.2s, transform 0.2s;
  border: none;
}
#scroll-top-arrow:hover {
  background: #25d366;
  transform: scale(1.08);
}
#scroll-top-arrow svg {
  width: 28px;
  height: 28px;
  display: block;
}
@media (max-width: 600px) {
  #scroll-top-arrow {
    left: 12px;
    bottom: 16px;
    width: 38px;
    height: 38px;
  }
  #scroll-top-arrow svg {
    width: 20px;
    height: 20px;
  }
}