/* LEFT */
      .left {
        width: 35%;
      }

      .section {
        background: #fafafa;
        padding: 15px;
        border-radius: 10px;
        border: 1px solid #eee;
        margin-bottom: 15px;
      }

      label {
        font-size: 13px;
        font-weight: bold;
        display: block;
        margin-bottom: 6px;
      }

      input {
        width: 100%;
        padding: 10px;
        border: 1px solid #ccc;
        border-radius: 6px;
        box-sizing: border-box;
      }

      .btns {
        display: flex;
        gap: 10px;
      }

      .app {
        flex: 1;
        padding: 10px;
        background: linear-gradient(135deg, #0a3d62, #07517d);
        color: #fff;
        border: none;
        border-radius: 5px;
        cursor: pointer;
      }

      /* RIGHT */
      .right {
        width: 65%;
      }

      .preview-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 10px;
        max-height: 75vh;
        overflow: auto;
      }

      .page {
        border: 1px solid #ddd;
        border-radius: 6px;
        overflow: hidden;
        position: relative;
        cursor: pointer;
      }

      .page img {
        width: 100%;
        display: block;
      }

      .page span {
        position: absolute;
        top: 5px;
        right: 5px;
        background: red;
        color: #fff;
        font-size: 12px;
        padding: 2px 6px;
        border-radius: 4px;
        display: none;
      }

      .page.selected span {
        display: block;
      }

      .content {
        display: flex;
        gap: 20px;
        /* padding: 20px; */
      }