diff --git a/app/src/components/LayoutShell.tsx b/app/src/components/LayoutShell.tsx
index 4c007ec..5ad61f3 100644
--- a/app/src/components/LayoutShell.tsx
+++ b/app/src/components/LayoutShell.tsx
@@ -1,23 +1,36 @@
 "use client";
+import { useEffect } from "react";
 import { SidebarNav } from "./SidebarNav";
 import { WatchlistSidebar } from "./WatchlistSidebar";
 import { SymbolHeader } from "./SymbolHeader";
+import { CollapsibleProvider, useCollapsibleContext } from "@/lib/collapsible-context";
 
 /**
- * Main layout shell for the redesigned terminal.
- * - Desktop (>1024px): Sidebar + Watchlist + Header + Content (3-column)
- * - Tablet (768-1024px): Compact watchlist bar + Header + Content (2-column, sidebar hidden, right column below center)
- * - Mobile (<768px): Header + Content (single column)
+ * Inner component that attaches the global Escape listener.
+ * Wrapped in CollapsibleProvider so all CollapsibleSections can register.
  */
-export function LayoutShell({ children }: { children: React.ReactNode }) {
+function LayoutShellInner({ children }: { children: React.ReactNode }) {
+  const { openSectionId, setOpenSectionId } = useCollapsibleContext();
+
+  // Global Escape listener: collapse the currently open section.
+  useEffect(() => {
+    const handler = (e: KeyboardEvent) => {
+      if (e.key === "Escape" && openSectionId) {
+        e.preventDefault();
+        // Collapse the currently open section by clearing the shared state.
+        // Individual CollapsibleSection Escape handlers also respond to this.
+        setOpenSectionId(null);
+      }
+    };
+    window.addEventListener("keydown", handler, true); // capture phase
+    return () => window.removeEventListener("keydown", handler, true);
+  }, [openSectionId, setOpenSectionId]);
+
   return (
     <div className="min-h-screen bg-[#0a0b0f] text-[#e6e7ec] flex flex-col">
       {/* Symbol Header — always visible */}
       <SymbolHeader />
 
-      {/* Tablet Compact Watchlist Bar — replaces sidebar on tablet */}
-      <CompactWatchlistBar />
-
       {/* Main Content Area */}
       <div className="flex flex-1 overflow-hidden">
         {/* Left Sidebar Navigation — hidden on tablet/mobile */}
@@ -26,88 +39,27 @@ export function LayoutShell({ children }: { children: React.ReactNode }) {
         {/* Watchlist Sidebar — hidden on mobile */}
         <WatchlistSidebar />
 
-        {/* Content + Right Analytics Column */}
-        <div className="flex flex-1 min-w-0">
-          {/* Center Content — full width on tablet/mobile, narrower on desktop */}
-          <main className="flex-1 overflow-y-auto p-4 sm:p-6">
-            <div className="max-w-7xl mx-auto space-y-6">
-              {children}
-            </div>
-          </main>
-
-          {/* Right Analytics Column — drops below center on tablet */}
-          <RightAnalyticsColumn />
-        </div>
+        {/* Content */}
+        <main className="flex-1 overflow-y-auto p-4 sm:p-6">
+          <div className="max-w-7xl mx-auto space-y-6">
+            {children}
+          </div>
+        </main>
       </div>
     </div>
   );
 }
 
 /**
- * Compact horizontal watchlist bar for tablet (768-1024px).
- * Replaces the sidebar on tablet — shows 2-3 symbols with mini-overview.
- * Hidden on desktop and mobile.
+ * Main layout shell for the redesigned terminal.
+ * - Desktop (>1024px): Sidebar + Watchlist + Header + Content (3-column)
+ * - Tablet (768-1024px): Watchlist + Header + Content (2-column, sidebar hidden)
+ * - Mobile (<768px): Header + Content (single column)
  */
-function CompactWatchlistBar() {
+export function LayoutShell({ children }: { children: React.ReactNode }) {
   return (
-    <div className="hidden md:flex items-center gap-3 px-4 py-2 border-b border-[#2a2b3a] bg-[#121318]/95 backdrop-blur-sm overflow-x-auto">
-      {/* Placeholder watchlist items — will be replaced with real data */}
-      <div className="flex items-center gap-2 flex-shrink-0">
-        <span className="text-xs font-bold text-[#e6e7ec]">AAPL</span>
-        <span className="text-xs font-mono text-[#34d399]">+1.2%</span>
-      </div>
-      <div className="flex items-center gap-2 flex-shrink-0">
-        <span className="text-xs font-bold text-[#e6e7ec]">MSFT</span>
-        <span className="text-xs font-mono text-[#34d399]">+0.8%</span>
-      </div>
-      <div className="flex items-center gap-2 flex-shrink-0">
-        <span className="text-xs font-bold text-[#e6e7ec]">NVDA</span>
-        <span className="text-xs font-mono text-[#fbbf24]">-0.3%</span>
-      </div>
-    </div>
-  );
-}
-
-/**
- * Right analytics column containing Filings and Options DD panels.
- * Desktop: flex row with center + right columns side by side
- * Tablet: right column drops below center content (flex column)
- */
-function RightAnalyticsColumn() {
-  return (
-    <div className="hidden lg:flex flex-col w-96 border-l border-[#2a2b3a] bg-[#121318]/50 overflow-y-auto p-4 space-y-4">
-      {/* Collapsible Filings Panel */}
-      <section className="rounded-xl border border-[#2a2b3a] bg-[#121318]">
-        <button
-          className="w-full flex items-center justify-between px-5 py-3 rounded-t-xl hover:bg-[#1a1b24] transition-colors"
-          aria-expanded="false"
-        >
-          <h2 className="text-sm font-semibold text-[#e6e7ec]">SEC Filings</h2>
-          <span className="text-[10px] text-[#5a5b6a]">▼</span>
-        </button>
-        <div className="px-5 pb-5">
-          <p className="text-xs text-[#5a5b6a]">Loading filings...</p>
-        </div>
-      </section>
-
-      {/* Collapsible Options DD Panel */}
-      <section className="rounded-xl border border-[#2a2b3a] bg-[#121318]">
-        <button
-          className="w-full flex items-center justify-between px-5 py-3 rounded-t-xl hover:bg-[#1a1b24] transition-colors"
-          aria-expanded="false"
-        >
-          <h2 className="text-sm font-semibold text-[#e6e7ec]">Options Due Diligence</h2>
-          <span className="text-[10px] text-[#5a5b6a]">▼</span>
-        </button>
-        <div className="px-5 pb-5">
-          <p className="text-xs text-[#5a5b6a]">Loading options data...</p>
-        </div>
-      </section>
-
-      {/* Footer */}
-      <footer className="border-t border-[#2a2b3a] pt-4 mt-4">
-        <p className="text-[11px] text-[#5a5b6a]">Educational analysis, not investment advice.</p>
-      </footer>
-    </div>
+    <CollapsibleProvider>
+      <LayoutShellInner>{children}</LayoutShellInner>
+    </CollapsibleProvider>
   );
 }
diff --git a/app/src/lib/collapsible-context.tsx b/app/src/lib/collapsible-context.tsx
new file mode 100644
index 0000000..6c69269
--- /dev/null
+++ b/app/src/lib/collapsible-context.tsx
@@ -0,0 +1,32 @@
+"use client";
+import { createContext, useContext, useState, type ReactNode } from "react";
+
+/**
+ * Shared context for tracking which CollapsibleSection is currently open.
+ * Used by LayoutShell to implement Escape-to-close across all panels.
+ */
+
+interface CollapsibleContextValue {
+  /** The id of the currently open section, or null if all are collapsed */
+  openSectionId: string | null;
+  /** Set the open section. Pass null to close all. */
+  setOpenSectionId: (id: string | null) => void;
+}
+
+const CollapsibleContext = createContext<CollapsibleContextValue>({
+  openSectionId: null,
+  setOpenSectionId: () => {},
+});
+
+export function CollapsibleProvider({ children }: { children: ReactNode }) {
+  const [openSectionId, setOpenSectionId] = useState<string | null>(null);
+  return (
+    <CollapsibleContext.Provider value={{ openSectionId, setOpenSectionId }}>
+      {children}
+    </CollapsibleContext.Provider>
+  );
+}
+
+export function useCollapsibleContext() {
+  return useContext(CollapsibleContext);
+}