body{
  background-color: #191919;

}
.gallery{
  width: 900px;
  display:flex;
  overflow-x:scroll ;
}
.gallery div{
  width: 100%;
  display: grid;
  grid-template-columns: auto auto auto;
  grid-gap: 20px;
  padding: 10px;
  flex: none;
}
.gallery div img{
  width: 100%;
  filter: grayscale(100%);
  transition: transform 0.5s;
}
.gallery::-webkit-scrollbar{
  display: none;
}
.gallery-wrap{
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 10% auto;
}
#backBtn, #nextBtn{
  width: 50px;
  cursor: pointer;
  margin: 40px;
}
.gallery div img:hover{
  filter: grayscale(0);
  cursor: pointer;
  transform: scale(1.1);
}