style: refine sidebar tab pills with inset track and depth

Author: abose

src/styles/Extn-SidebarTabs.less

@@ -23,39 +23,52 @@
 #navTabBar {
     display: none;
     align-items: center;
-    gap: 0.25rem;
-    background-color: @bc-ai-sidebar-bg;
-    padding: 0.35rem 0.5rem;
+    gap: 2px;
+    width: fit-content;
+    margin: 0.5rem 0.5rem 0.4rem;
+    padding: 3px;
+    background-color: rgba(0, 0, 0, 0.3);
+    border-radius: 7px;
+    box-shadow: inset 0 1px 1px rgba(0, 0, 0, 0.25);
     user-select: none;
 
     &.has-tabs {
-        display: flex;
+        display: inline-flex;
     }
 }
 
 .sidebar-tab {
     display: inline-flex;
     align-items: center;
-    gap: 0.35rem;
-    padding: 0.25rem 0.7rem;
+    gap: 0.4rem;
+    padding: 0.25rem 0.75rem;
     cursor: pointer;
     color: @project-panel-text-2;
-    font-size: 0.85rem;
-    border-radius: 4px;
-    transition: color 0.15s ease, background-color 0.15s ease;
+    font-size: 0.8rem;
+    font-weight: 500;
+    border-radius: 5px;
+    transition: color 0.15s ease, background-color 0.15s ease, box-shadow 0.15s ease;
 
     i {
-        font-size: 0.75rem;
+        font-size: 0.78rem;
+        opacity: 0.85;
     }
 
-    &:hover {
+    &:hover:not(.active) {
         color: @project-panel-text-1;
-        background-color: rgba(255, 255, 255, 0.06);
+        background-color: rgba(255, 255, 255, 0.04);
     }
 
     &.active {
         color: @project-panel-text-1;
-        background-color: rgba(255, 255, 255, 0.12);
+        background-color: rgba(255, 255, 255, 0.09);
+        box-shadow:
+            0 1px 0 rgba(255, 255, 255, 0.05) inset,
+            0 1px 2px rgba(0, 0, 0, 0.2);
+
+        i {
+            opacity: 1;
+        }
     }
 }