.slider {
  position: relative;
  max-width: 1300px;
  margin: 30px auto ;
  overflow: hidden;
  border-radius: 20px;
  padding-bottom: 50px;
}

.slider__track-wrapper {
  overflow: hidden;
}

.slider__track {
  display: flex;
  transition: transform 0.5s ease;
  justify-content: center;
}

.blog_card {
    flex: 0 0 33.3333%;
    box-sizing: border-box;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    opacity: 1;
    transform: scale(1);
    max-width: 100%;
    height: 569px;
    transition: opacity 0.5s ease, transform 0.5s ease, max-width 0.5s ease, padding 0.5s ease, margin 0.5s ease;
}

.blog_card.hidden {
  opacity: 0;
  transform: scale(0.8);
  max-width: 0;
  padding: 0;
  margin: 0;
  pointer-events: none;
}


/* При ширині менше 1300px - 2 слайди */
@media (max-width: 1300px) {
  .blog_card {
    flex: 0 0 50%;
  }
}

/* При ширині менше 700px - 1 слайд */
@media (max-width: 700px) {
  .blog_card {
    flex: 0 0 100%;
    padding: 0;
  }
}

/* Стрілки за замовчуванням сховані */
.slider__btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0,0,0,0.4);
  border: none;
  color: #fff;
  font-size: 2rem;
  padding: 10px;
  cursor: pointer;
  z-index: 2;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}

.slider__btn.visible {
  opacity: 1;
  pointer-events: auto;
}

.slider__btn--prev {
  left: 10px;
}

.slider__btn--next {
  right: 10px;
}