// コンテナ
.instagram-container{
  display: flex;
  flex-wrap: wrap;
  margin: 0 -1px;
}
 
.instagram-item{
  position: relative;
  width: 50%;
  padding: 1px;
  float: left;
}
.instagram-card:before{
  content: "";
  display: block;
  padding-top: 100%;
}

.instagram-card img{
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  margin: auto;
  object-fit: cover;
}

a.instagram-card {
    display: block;
    position: relative;
 }

@media screen and (min-width: 768px){
  .instagram-item {
      width: 25%;
  }
}
 
a.instagram-card{
  display: block;
  position: relative;

}
 
.instagram-card__img{
  max-width: 100%;
  height: auto;
  display: block;
}
}