.container__img-holder {
    max-width: 280px;
    display: inline-block;
    vertical-align: top;
    margin-bottom: 20px;
    margin-left: 16px;
    cursor: pointer;
  }
  
  .container .container__img-holder:nth-child(3n+1) {
    margin-left: 0;
  }
  
  .container__img-holder img {
    width: 100%;
    height: 220px;
    display: block;
  }
  
  
  /* Popup Styling */
  .img-popup {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: rgba(255, 255, 255, .5);
    display: flex;
    justify-content: center;
    align-items: center;
    display: none;
  }
  
  .img-popup img {
    max-width: 900px;
    width: 100%;
    opacity: 0;
    transform: translateY(-100px);
    -webkit-transform: translateY(-100px);
    -moz-transform: translateY(-100px);
    -ms-transform: translateY(-100px);
    -o-transform: translateY(-100px);
  }
  
  .close-btn {
    width: 35px;
    height: 30px;
    display: flex;
    justify-content: center;
    flex-direction: column;
    position: absolute;
    top: 20px;
    right: 20px;
    cursor: pointer;
  }
  
  .close-btn .bar {
    height: 4px;
    background: #333;
  }
  
  .close-btn .bar:nth-child(1) {
    transform: rotate(45deg);
  }
  
  .close-btn .bar:nth-child(2) {
    transform: translateY(-4px) rotate(-45deg);
  }
  
  .opened {
    display: flex;
  }
  
  .opened img {
    animation: animatepopup 1s ease-in-out .8s;
    -webkit-animation: animatepopup .3s ease-in-out forwards;
  }
  
  @keyframes animatepopup {
  
    to {
      opacity: 1;
      transform: translateY(0);
      -webkit-transform: translateY(0);
      -moz-transform: translateY(0);
      -ms-transform: translateY(0);
      -o-transform: translateY(0);
    }
  
  }
  
  @media screen and (max-width: 880px) {
  
    .container .container__img-holder:nth-child(3n+1) {
      margin-left: 16px;
    }
  
  }