html,
* { box-sizing: border-box; 
}
body 
{ background: #fff;  
}
.galler {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-gap: 0px;
  max-width: 100%;
  margin: 0 auto;
}
.galler img {
 
  object-fit: contain;
  position: relative;
}
@media only screen and (max-width: 1200px) {
  .galler {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media only screen and (max-width: 800px) {
  .galler{
    grid-template-columns: repeat(1, 1fr);
  }
}