.ddAreaUpl {
        height: 40px;
        border: 2px dashed #ccc;
        line-height: 35px;
        text-align: center;
        font-size: 14px;
        background: #f9f9f9;
        margin-bottom: 15px;
      }

      .drag_over {
        color: #000;
        border-color: #000;
      }

      .thumbnail {
        width: 100px;
        height: 100px;
        padding: 2px;
        margin: 2px;
        border: 2px solid lightgray;
        border-radius: 3px;
        float: left;
      }

      .d-none {
        display: none;
      }

      .d-block {
        display: block;
      }

      /* Absolute Center Spinner */
      .loading {
        position: fixed;
        z-index: 999;
        height: 2em;
        width: 2em;
        overflow: visible;
        margin: auto;
        top: 0;
        left: 0;
        bottom: 0;
        right: 0;
      }

      /* Transparent Overlay */
      .loading:before {
        content: "";
        display: block;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.3);
      }