.accordion collapse {
  border: 0;
}

.accordion-button:focus {
  box-shadow: none;
  border: none;
}

.accordion-button::after {
  width: auto;
  height: auto;
  background-image: none;
  font-weight: 100;
  transform: translateY(-4px);
}

.accordion-button:not(.collapsed)::after {
  width: auto;
  height: auto;
  background-image: none;
  transform: translate(-5px, -4px);
  transform: rotate(0deg);
}