diff --git a/studio/frontend/src/components/app-sidebar.tsx b/studio/frontend/src/components/app-sidebar.tsx
index 58a2d316c9..b25f3965b4 100644
--- a/studio/frontend/src/components/app-sidebar.tsx
+++ b/studio/frontend/src/components/app-sidebar.tsx
@@ -525,53 +525,6 @@ export function AppSidebar() {
           </SidebarGroupContent>
         </SidebarGroup>
 
-        <SidebarGroup
-          data-tour="navbar"
-          className="group-data-[collapsible=icon]:px-0 px-2 pt-[9px] pb-[20px] shrink-0"
-        >
-          <SidebarGroupContent>
-            <SidebarMenu>
-              <NavItem
-                icon={TestTubeOutlineIcon}
-                label={t("shell.navigation.train")}
-                active={
-                  pathname === "/studio" || pathname.startsWith("/studio/")
-                }
-                disabled={chatOnly}
-                onClick={() => {
-                  if (chatOnly) return;
-                  navigate({ to: "/studio" });
-                  closeMobileIfOpen();
-                }}
-              />
-
-              <NavItem
-                icon={ChefHatIcon}
-                label={t("shell.navigation.recipes")}
-                active={isRecipesRoute}
-                onClick={() => {
-                  navigate({ to: "/data-recipes" });
-                  closeMobileIfOpen();
-                }}
-              />
-
-              <NavItem
-                icon={DownloadSquare01Icon}
-                label={t("shell.navigation.export")}
-                active={
-                  pathname === "/export" || pathname.startsWith("/export/")
-                }
-                disabled={chatOnly}
-                onClick={() => {
-                  if (chatOnly) return;
-                  navigate({ to: "/export" });
-                  closeMobileIfOpen();
-                }}
-              />
-            </SidebarMenu>
-          </SidebarGroupContent>
-        </SidebarGroup>
-
         <SidebarContent
           ref={scrollRef}
           className={cn(
@@ -580,6 +533,53 @@ export function AppSidebar() {
             canScrollDown && "can-scroll-down",
           )}
         >
+          <SidebarGroup
+            data-tour="navbar"
+            className="group-data-[collapsible=icon]:px-0 px-2 pt-[9px] pb-[20px]"
+          >
+            <SidebarGroupContent>
+              <SidebarMenu>
+                <NavItem
+                  icon={TestTubeOutlineIcon}
+                  label={t("shell.navigation.train")}
+                  active={
+                    pathname === "/studio" || pathname.startsWith("/studio/")
+                  }
+                  disabled={chatOnly}
+                  onClick={() => {
+                    if (chatOnly) return;
+                    navigate({ to: "/studio" });
+                    closeMobileIfOpen();
+                  }}
+                />
+
+                <NavItem
+                  icon={ChefHatIcon}
+                  label={t("shell.navigation.recipes")}
+                  active={isRecipesRoute}
+                  onClick={() => {
+                    navigate({ to: "/data-recipes" });
+                    closeMobileIfOpen();
+                  }}
+                />
+
+                <NavItem
+                  icon={DownloadSquare01Icon}
+                  label={t("shell.navigation.export")}
+                  active={
+                    pathname === "/export" || pathname.startsWith("/export/")
+                  }
+                  disabled={chatOnly}
+                  onClick={() => {
+                    if (chatOnly) return;
+                    navigate({ to: "/export" });
+                    closeMobileIfOpen();
+                  }}
+                />
+              </SidebarMenu>
+            </SidebarGroupContent>
+          </SidebarGroup>
+
           {!isStudioRoute && chatItems.length > 0 && (
             <Collapsible
               key={isChatRoute ? "chat-route" : "non-chat-route"}
@@ -795,7 +795,12 @@ export function AppSidebar() {
           )}
         </SidebarContent>
 
-        <SidebarFooter className="border-t border-sidebar-border group-data-[collapsible=icon]:border-transparent group-data-[collapsible=icon]:px-0">
+        <SidebarFooter
+          className={cn(
+            "app-sidebar-footer group-data-[collapsible=icon]:px-0",
+            canScrollDown && "can-scroll-down",
+          )}
+        >
           <SidebarMenu>
             <SidebarMenuItem>
               <DropdownMenu>
diff --git a/studio/frontend/src/components/assistant-ui/thread.tsx b/studio/frontend/src/components/assistant-ui/thread.tsx
index 52ba313d74..f87a51ae31 100644
--- a/studio/frontend/src/components/assistant-ui/thread.tsx
+++ b/studio/frontend/src/components/assistant-ui/thread.tsx
@@ -1476,7 +1476,7 @@ const ComposerToolsMenu: FC<{ side?: "top" | "bottom" }> = ({
           aria-label="Tools and attachments"
           className="unsloth-composer-plus"
         >
-          <PlusIcon className="size-6 stroke-[1.75px]" />
+          <PlusIcon className="size-[22px] stroke-2" />
         </button>
       </DropdownMenuTrigger>
       <DropdownMenuContent
@@ -1649,10 +1649,10 @@ const ComposerRightControls: FC<{
                   event.preventDefault();
                 }
               }}
-              className="aui-composer-send size-8 rounded-full disabled:bg-transparent disabled:text-foreground/40 disabled:opacity-100 disabled:pointer-events-none"
+              className="aui-composer-send composer-send-enter size-8 rounded-full disabled:bg-transparent disabled:text-foreground/40 disabled:opacity-100 disabled:pointer-events-none"
               aria-label="Send message"
             >
-              <ArrowUpIcon className="aui-composer-send-icon size-6 stroke-[1.75px]" />
+              <ArrowUpIcon className="aui-composer-send-icon size-[22px] stroke-2" />
             </TooltipIconButton>
           </ComposerPrimitive.Send>
         </AuiIf>
diff --git a/studio/frontend/src/components/ui/sidebar.tsx b/studio/frontend/src/components/ui/sidebar.tsx
index 9c3da94cd2..b7ac26a3d7 100644
--- a/studio/frontend/src/components/ui/sidebar.tsx
+++ b/studio/frontend/src/components/ui/sidebar.tsx
@@ -305,9 +305,8 @@ function Sidebar({
           data-sidebar="sidebar"
           data-slot="sidebar-inner"
           className={cn(
-            "bg-sidebar flex size-full flex-col overflow-hidden border-r border-sidebar-border",
+            "bg-sidebar flex size-full flex-col overflow-hidden",
             "group-data-[variant=floating]:ring-sidebar-border group-data-[variant=floating]:rounded-lg group-data-[variant=floating]:shadow-sm group-data-[variant=floating]:ring-1",
-            hasPinMode && "ring-1 ring-sidebar-border/60",
           )}
         >
           {children}
diff --git a/studio/frontend/src/features/chat/shared-composer.tsx b/studio/frontend/src/features/chat/shared-composer.tsx
index e9cf589f32..07ea55ca70 100644
--- a/studio/frontend/src/features/chat/shared-composer.tsx
+++ b/studio/frontend/src/features/chat/shared-composer.tsx
@@ -1078,7 +1078,7 @@ export function SharedComposer({
                 aria-label="Tools and attachments"
                 className="unsloth-composer-plus"
               >
-                <PlusIcon className="size-6 stroke-[1.75px]" />
+                <PlusIcon className="size-[22px] stroke-2" />
               </button>
             </DropdownMenuTrigger>
             <DropdownMenuContent
@@ -1542,12 +1542,12 @@ export function SharedComposer({
               side="bottom"
               variant="default"
               size="icon"
-              className="size-8 rounded-full disabled:bg-transparent disabled:text-foreground/40 disabled:opacity-100 disabled:pointer-events-none"
+              className="composer-send-enter size-8 rounded-full disabled:bg-transparent disabled:text-foreground/40 disabled:opacity-100 disabled:pointer-events-none"
               onClick={send}
               disabled={!canSend}
               aria-label="Send message"
             >
-              <ArrowUpIcon className="size-6 stroke-[1.75px]" />
+              <ArrowUpIcon className="size-[22px] stroke-2" />
             </TooltipIconButton>
           ) : null}
         </div>
diff --git a/studio/frontend/src/index.css b/studio/frontend/src/index.css
index bc957ad614..59c0e58eaf 100644
--- a/studio/frontend/src/index.css
+++ b/studio/frontend/src/index.css
@@ -537,26 +537,30 @@
   }
 
   .sidebar-sticky-label {
-    @apply sticky top-0 z-20 rounded-none bg-sidebar pt-0 pb-1.5 pl-[18px] pr-4 text-[13px]! font-medium normal-case tracking-[0.04em] text-nav-fg-muted focus-visible:ring-0! focus-visible:outline-none shadow-[0_-8px_0_0_var(--sidebar)] transition-shadow duration-150;
-  }
-  .sidebar-sticky-label.is-scrolled {
-    @apply shadow-[0_-8px_0_0_var(--sidebar),0_0.5px_0_0_var(--sidebar-border)];
+    @apply rounded-none bg-sidebar pt-0 pb-1.5 pl-[18px] pr-4 text-[13px]! font-medium normal-case tracking-[0.04em] text-nav-fg-muted focus-visible:ring-0! focus-visible:outline-none;
   }
 
   .app-sidebar-top-actions {
     position: relative;
     z-index: 25;
-    transition: box-shadow var(--duration-fast) ease-out;
+    background: var(--sidebar);
   }
 
-  .app-sidebar-top-actions.is-scrolled {
-    box-shadow: 0 0.5px 0 0 var(--sidebar-border), 0 10px 18px -18px
-      rgba(0, 0, 0, 0.42);
+  .app-sidebar-top-actions::after {
+    content: "";
+    position: absolute;
+    left: 0;
+    right: 0;
+    bottom: -16px;
+    height: 16px;
+    pointer-events: none;
+    opacity: 0;
+    background: linear-gradient(to bottom, var(--sidebar) 0, transparent 100%);
+    transition: opacity var(--duration-fast) ease-out;
   }
 
-  .dark .app-sidebar-top-actions.is-scrolled {
-    box-shadow: 0 0.5px 0 0 var(--sidebar-border), 0 12px 20px -18px
-      rgba(0, 0, 0, 0.72);
+  .app-sidebar-top-actions.is-scrolled::after {
+    opacity: 1;
   }
 
   .app-sidebar-scroll-region {
@@ -588,6 +592,23 @@
     );
   }
 
+  .app-sidebar-footer {
+    position: relative;
+    z-index: 25;
+    background: var(--sidebar);
+  }
+
+  .app-sidebar-footer.can-scroll-down::before {
+    content: "";
+    position: absolute;
+    left: 0;
+    right: 0;
+    top: -24px;
+    height: 24px;
+    pointer-events: none;
+    background: linear-gradient(to bottom, transparent 0, var(--sidebar) 100%);
+  }
+
   /* Neutral panel input surface — sidesteps the green cast on
 	   `--input` / `--border` (both have a small chroma at hue ~165 in
 	   light mode). Same value drives the preset input pill, the system
@@ -891,6 +912,28 @@
     display: inline-flex;
   }
 
+  .composer-send-enter {
+    animation: composer-send-enter 120ms var(--ease-out-quart) both;
+  }
+
+  @keyframes composer-send-enter {
+    from {
+      opacity: 0;
+      transform: scale(0.92);
+    }
+
+    to {
+      opacity: 1;
+      transform: scale(1);
+    }
+  }
+
+  @media (prefers-reduced-motion: reduce) {
+    .composer-send-enter {
+      animation: none;
+    }
+  }
+
   .composer-input {
     @apply mb-1 min-h-10 w-full resize-none overflow-y-auto bg-transparent px-1.5 py-2 text-[15px] font-[450] leading-6 outline-none placeholder:text-muted-foreground focus-visible:ring-0;
   }
@@ -989,13 +1032,16 @@
   }
 
   .unsloth-composer-plus[data-state="open"] {
-    @apply bg-muted-foreground/15;
     /* Radix's modal menu sets body pointer-events:none; re-enable on the open
 		   trigger so the cursor and click-to-close work. */
     pointer-events: auto;
     cursor: pointer;
   }
 
+  .unsloth-composer-plus[data-state="open"]:hover {
+    background-color: transparent;
+  }
+
   .unsloth-composer-plus[data-state="open"] svg {
     transform: rotate(35deg);
   }
@@ -1055,8 +1101,7 @@
     ) {
     @apply gap-3 pl-4 pr-3 py-2 text-[14px];
     cursor: pointer;
-    /* Pin hover-box radius so dark matches light (same as the container). */
-    border-radius: 1.1rem;
+    border-radius: 12px;
   }
 
   .unsloth-plus-menu [data-slot="dropdown-menu-label"] {