.bgs-container{border:1px solid #ddd;padding:12px;background:#fff}.bgs-row{margin-bottom:10px}.bgs-books{display:flex;gap:20px}.bgs-col{flex:1;max-height:220px;overflow:auto;border:1px solid #eee;padding:6px}.bgs-book-item{cursor:pointer;padding:4px 2px;border-bottom:1px solid #f0f0f0}.bgs-book-item:hover{background:#f5f5f5}.bgs-selects input[type=text]{width:45%;padding:6px}.bgs-result{margin-top:12px;padding:10px;border-top:1px dashed #ccc}