/* Стрелки навигации */
.page-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);

  font-size: 28px;
  color: white;
  background: rgba(0, 0, 0, 0.15);

  width: 30px;
  height: 30px;
  border-radius: 50%;

  display: flex;
  align-items: center;
  justify-content: center;

  cursor: pointer;
  z-index: 999;

  transition: background 0.2s;
}

.page-nav.left {
  left: 12px;
}

.page-nav.right {
  right: 12px;
}

.page-nav:hover {
  background: rgba(0, 0, 0, 0.35);
}