app-myapp/app/tab1/tab1.page.scss

page-tab1 {
  .photo-wrapper {
    width: calc(50% - 8px);
    margin-bottom: 8px;
    box-sizing: border-box;
    float: left;
    clear: none;
  }

  .photo-wrapper:nth-child(2n+1) {
    margin-right: 8px;
  }

  .photo-container {
    display: block;
    overflow: hidden;
  }

  ion-img {
    width: 100%;
    height: auto;
    object-fit: cover;
    border-radius: 8px;
    display: block;
    cursor: pointer;
  }
}