/* HR */

hr {
  border: none;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(255, 255, 255, 0.4), transparent);
}

/* Reset */

.accordion-button, .accordion-button:focus {
  box-shadow: none !important;
  outline: none !important;
}

.accordion-item, .accordion-collapse {
  border: none !important;
}

/* Flecha Bootstrap (sin glitches) */

.accordion-button::after {
  filter: brightness(0) invert(1);
  transition: transform 220ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Abierto */

.accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
}