#main{
  width: 100%;
  height: 100vh;
  position: relative;
}

/* collection-bg */
.collection-bg{
  position: relative;
  width: 100%;
  height: 100%;
}

.collection-bg h1{
  font-size: var(--font-size-XL);
  font-weight: normal;
  position: absolute;
  z-index: 2;
  left: 50%;
  top: 20%;
  transform: translateX(-50%);
}

.collection-bg h1.white{
  color: var(--white);
}

.collection-bg h1.black{
  color: var(--black);
}

.collection-bg__swiper {
  width: 100%;
  height: 100%;
}

.section-1,
.section-2,
.section-3,
.section-4 {
  width: 100%;
  height: 100vh;
  object-fit: cover;
  object-position: top;
}

  .section-1 {
    background-image: url('../assets/images/collection/antioxidant.jpg');
  }
  .section-2 {
    background-image: url('../assets/images/collection/vegan.jpg');
  }
  .section-3 {
    background-image: url('../assets/images/collection/moisture.jpg');
  }
  .section-4 {
    background-image: url('../assets/images/collection/relax.jpg');
  }

/* collection-content */
.collection-content__wrap{
  width: 33.333%;
  /* width: 100%; */
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%,-50%);
  z-index: 3;
  text-align: center;
}

.collection-content__item{
  opacity: 0.5;
}

.collection-content__item.swiper-slide-active{
  opacity: 1;
}

.collection-content__item.white{
  color: var(--white);
  font-weight: normal;
}

.collection-content__item.black{
  color: var(--black);
  font-weight: normal;
}

.item-number{
  font-weight: normal;
  font-size: var(--font-size-XL);
}

.item-title{
  font-size: var(--font-size-L);
  font-weight: normal;
  margin: 10px;
}

.item-text{
  font-size: var(--font-size-S);
  line-height: 1.5;
}

.item-button{
  display: inline-block;
  font-size: var(--font-size-S);
  margin-top: 40px;
  transition: all .2s;
  cursor: pointer;
  padding: 20px 20px;
}

.item-button.white{
  border: 1px solid #fff;
  color: #fff;
}

.collection-content__item.swiper-slide-active .item-button.white{
  background-color: #fff;
  color: #000;
}

.collection-content__item.swiper-slide-active .item-button.black{
  background-color: #000;
  color: #fff;
}

.item-button.black{
  border: 1px solid #000;
  color: #000;
}

.arrow-left{
  position: absolute;
  top: 50%;
  left: -95%;
  z-index: 2;
}

.arrow-right{
  position: absolute;
  top: 50%;
  right: -95%;
  z-index: 2;
}

@media screen and (max-width:900px) {
  .section-1 {
    background-image: url('../assets/images/collection/mobile_antioxidant.jpg');
  }
  .section-2 {
    background-image: url('../assets/images/collection/mobile_vegan.jpg');
  }
  .section-3 {
    background-image: url('../assets/images/collection/mobile_moisture.jpg');
  }
  .section-4 {
    background-image: url('../assets/images/collection/mobile_relax.jpg');
  }

  .collection-content__wrap{
    width: 60%;
  }

  .item-number{
    font-weight: normal;
    font-size: var(--font-size-L);
  }
  
  .item-title{
    font-size: var(--font-size-M);
    font-weight: normal;
    margin: 10px;
  }
  
  .item-text{
    font-size: var(--font-size-XS);
    line-height: 1.5;
  }
  
  .item-button{
    font-size: var(--font-size-XS);
  }
  
  .arrow-left {
    position: absolute;
    top: 50%;
    left: 5%;
  }

  .arrow-right {
    position: absolute;
    top: 50%;
    right: 5%;
    z-index: 2;
  }
}