Типовые элементы интерфейса — Подсказки (tooltip)

.tooltip-btn {
  position: relative;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 8px;
  background: var(--color-primary);
  color: #fff;
  cursor: pointer;
}

.tooltip-btn::after {
  content: attr(data-tooltip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 0.5rem);
  transform: translateX(-50%) scale(0.9);
  padding: 0.35rem 0.65rem;
  font-size: 0.8125rem;
  white-space: nowrap;
  background: var(--color-dark);
  color: #fff;
  border-radius: 6px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.tooltip-btn:hover::after,
.tooltip-btn:focus-visible::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

.tooltip-btn__hint {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
}

@media (prefers-reduced-motion: reduce) {
  .tooltip-btn::after {
    transition: none;
  }
}