.isbn-barcode-container{max-width:500px;margin:20px auto;padding:20px;background:#f8f8f8;border-radius:5px;box-shadow:0 2px 5px rgb(0 0 0 / .1)}.isbn-barcode-form .form-group{display:flex;margin-bottom:15px}.isbn-barcode-form input{flex:1;padding:10px;border:1px solid #ddd;border-radius:4px 0 0 4px;font-size:16px}.isbn-barcode-form button{padding:10px 15px;background:#0073aa;color:#fff;border:none;border-radius:0 4px 4px 0;cursor:pointer;transition:background 0.3s}.isbn-barcode-form button:hover{background:#005177}.isbn-barcode-form button:disabled{background:#ccc;cursor:not-allowed}.error-message{color:#d32f2f;margin-bottom:15px;font-size:14px;display:none}.barcode-result{margin-top:20px;text-align:center}.barcode-image-container{padding:15px;background:#fff;border:1px solid #ddd;border-radius:4px;margin-bottom:15px}.barcode-image-container img{max-width:100%;height:auto}.download-button{display:inline-block;padding:10px 20px;background:#4CAF50;color:#fff;border:none;border-radius:4px;cursor:pointer;font-size:14px;text-decoration:none;transition:background 0.3s}.download-button:hover{background:#388E3C}