main {

  overflow: hidden;
  height:100vh;
  width:100vw;
}

.full-size {
  width: 50%;
  margin: 0 auto;
  position: relative;
  height:70%;
}

.full-size img {
  object-fit: cover;
  max-width: 100%;
  height: 100%;
}

.thumbnails {
  width:100%;
}

.thumbnails img{
  width:20%;
}
.thumbnails img{
  filter:blur(4px);
}
.thumbnails img:hover {
  filter:blur(0px);
}