added bulk price update feature, allowing users to select multiple products and apply a new price to all of them at once. The bulk action bar now shows the count of selected items and enables the "OK" button only when at least one product is selected.

static/styleIndex.css

@@ -157,26 +157,80 @@ th {
     font-weight: bold;
 }
 
-#new-product-prompt {
-    display: none;
+/* --- BULK ACTIONS PERMANENT BAR --- */
+.bulk-actions {
+    display: flex;
     background: var(--accent);
     color: white;
-    padding: 12px 20px;
+    padding: 10px 20px;
     border-radius: 8px;
-    margin-bottom: 20px;
-    animation: slideDown 0.4s ease;
+    margin-bottom: 15px;
     justify-content: space-between;
     align-items: center;
+    min-height: 60px;
+    box-sizing: border-box;
+    width: 100%;
+}
+
+.bulk-controls {
+    display: flex;
+    align-items: center;
+    gap: 10px;
+    flex-shrink: 0;
+}
+
+/* Override the global 100% width for this specific input */
+.bulk-actions input#bulk-price-input {
+    width: 130px !important;
+    margin: 0 !important;
+    padding: 8px !important;
+    height: 36px !important;
+    background: rgba(0,0,0,0.2) !important;
+    border: 1px solid rgba(255,255,255,0.3) !important;
+    color: white !important;
+}
+
+.bulk-actions button {
+    height: 36px;
+    white-space: nowrap;
+    padding: 0 15px;
+    margin: 0;
+}
+
+/* --- RESPONSIVE DESIGN (MOBILE) --- */
+@media (max-width: 900px) {
+    .main-container {
+        flex-direction: column;
+    }
+    
+    .column {
+        min-width: 100%;
+    }
+
+    .bulk-actions {
+        flex-direction: column;
+        height: auto;
+        padding: 15px;
+        gap: 10px;
+        text-align: center;
+    }
+
+    .bulk-controls {
+        width: 100%;
+        justify-content: center;
+    }
+
+    .bulk-actions input#bulk-price-input {
+        width: 100% !important; /* On mobile, let it be wide */
+    }
+
+    /* Hide barcode on very small screens to save space */
+    td:nth-child(2), th:nth-child(2) {
+        display: none;
+    }
 }
 
 @keyframes slideDown {
-    from {
-        transform: translateY(-20px);
-        opacity: 0;
-    }
-
-    to {
-        transform: translateY(0);
-        opacity: 1;
-    }
-}
+    from { transform: translateY(-20px); opacity: 0; }
+    to { transform: translateY(0); opacity: 1; }
+}