.tab__panel {
  display: none;
}

.tab__panel--active {
  display: block;
}

.tab__btn {
  background: #fafafa;
  border: 1px solid #e0e0e0;
  border-bottom: none;
  cursor: pointer;
}
@media (hover: hover) {
  .tab__btn:hover {
    background: #f0f0f0;
  }
}

.tab__btn--active {
  background: #0f0f0f;
  color: #fff;
}

.tab__panel--active {
  border: 1px solid #e0e0e0;
  background: #fafafa;
  color: #333;
}