@media only screen and (max-width: 600px) {
    .columnLeft,
    .columnRight {
        width: 100%;
    }
    .imgIndex {
        display: block;
        width: 100%;
        border: 0px;
        height: auto;
        margin: 0;
        text-align: left;
    }
}
.popup {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    text-align: center;
  }
  
  .popup img {
    max-width: 90%;
    max-height: 90%;
    margin: auto;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
  }

  .cerrar {
    position: absolute;
    top: 10px;
    right: 10px;
    width: 30px;
    height: 30px;
    border: none;
    background-color: transparent;
    font-size: 20px;
    color: #fff;
    cursor: pointer;
  }