.row {
    display: flex;
    flex-wrap: wrap;
    padding: 0 4px;
  }
  
  .column {
    flex: 25%;
    max-width: 33.3%;
    padding: 0 4px;
  }
  
  .column img {
    margin-top: 8px;
    vertical-align: middle;
    width: 100%;
    /* filter: grayscale(1) brightness(0.5); */
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s linear;
  }
  
  .column img:hover {
    /* filter: grayscale(0); */
    filter:grayscale(100%)
  }
  
  @media screen and (max-width: 700px) {
    .column {
      flex: 100%;
      max-width: 100%;
    }
    .column img {
      filter: grayscale(0) brightness(1);
    }
  }