diff --git a/frontend/src/App.tsx b/frontend/src/App.tsx
index bb4aa48..f522f99 100644
--- a/frontend/src/App.tsx
+++ b/frontend/src/App.tsx
@@ -56,7 +56,7 @@ function App() {
         {/* Left Sidebar */}
         <div
           className={`transition-all duration-200 ${
-            leftSidebarOpen ? 'w-64' : 'w-0'
+            leftSidebarOpen ? 'w-60' : 'w-0'
           } overflow-hidden border-r border-border bg-surface`}
         >
           <LeftSidebar
@@ -88,7 +88,7 @@ function App() {
         {/* Right Sidebar */}
         <div
           className={`transition-all duration-200 ${
-            showRightSidebar ? 'w-80' : 'w-0'
+            showRightSidebar ? 'w-72' : 'w-0'
           } overflow-hidden border-l border-border bg-surface`}
         >
           <RightSidebar onCollapse={() => setRightSidebarOpen(false)} />
diff --git a/frontend/src/components/heaps/ActiveHeapCard.tsx b/frontend/src/components/heaps/ActiveHeapCard.tsx
index 23d2cb0..07b4887 100644
--- a/frontend/src/components/heaps/ActiveHeapCard.tsx
+++ b/frontend/src/components/heaps/ActiveHeapCard.tsx
@@ -56,20 +56,20 @@ export function ActiveHeapCard() {
   }))
 
   return (
-    <div className="m-2 rounded-lg border border-border bg-surface-2 shadow-sm">
+    <div className="m-1.5 rounded-md border border-border bg-surface-2 shadow-sm">
       {/* Header — clickable, navigates to the heap section. */}
       <button
         onClick={() =>
           navigateToSection(`heap-${activeHeap.id}`, { heapId: activeHeap.id })
         }
-        className="flex w-full items-center gap-2 rounded-t-lg px-3 py-2 text-left hover:bg-surface-offset"
+        className="flex w-full items-center gap-1.5 rounded-t-md px-2 py-1.5 text-left hover:bg-surface-offset"
         title={`Open "${activeHeap.name}"`}
       >
-        <ShoppingBasket className="h-4 w-4 flex-shrink-0 text-pick" />
-        <span className="min-w-0 flex-1 truncate text-sm font-semibold text-text">
+        <ShoppingBasket className="h-3.5 w-3.5 flex-shrink-0 text-pick" />
+        <span className="min-w-0 flex-1 truncate text-[12px] font-semibold text-text">
           {activeHeap.name}
         </span>
-        <span className="flex h-5 min-w-[24px] items-center justify-center rounded bg-surface px-1.5 text-[11px] font-medium text-text-muted">
+        <span className="flex h-4 min-w-[20px] items-center justify-center rounded bg-surface px-1 text-[10px] font-medium text-text-muted">
           {orderedIds.length}
         </span>
       </button>
@@ -81,7 +81,7 @@ export function ActiveHeapCard() {
        *  so the cacti frame the photos rather than the (transparent) sky. */}
       <div
         key={activeHeap.id}
-        className="relative h-24 overflow-hidden rounded-b-lg px-3 pb-3"
+        className="relative h-20 overflow-hidden rounded-b-md px-2 pb-2"
         style={{
           backgroundImage: `url(${cardBg})`,
           backgroundSize: 'cover',
@@ -117,10 +117,10 @@ export function ActiveHeapCard() {
                     position: 'absolute',
                     left: '50%',
                     top: '50%',
-                    marginLeft: -32, // half of w-16
-                    marginTop: -32,  // half of h-16
+                    marginLeft: -26, // half of w-13
+                    marginTop: -26,  // half of h-13
                   }}
-                  className="h-16 w-16 rounded object-cover shadow-md ring-1 ring-black/40"
+                  className="h-[52px] w-[52px] rounded object-cover shadow-md ring-1 ring-black/40"
                 />
               ))}
             </AnimatePresence>
diff --git a/frontend/src/components/heaps/HeapsPanel.tsx b/frontend/src/components/heaps/HeapsPanel.tsx
index c883362..1e35505 100644
--- a/frontend/src/components/heaps/HeapsPanel.tsx
+++ b/frontend/src/components/heaps/HeapsPanel.tsx
@@ -176,9 +176,10 @@ export function HeapsPanel() {
 
   return (
     <div>
-      {/* Section header */}
+      {/* Section header — eyebrow style to match the LeftSidebar
+       *  library/folders headers. */}
       <div
-        className="group flex cursor-pointer items-center gap-1 rounded px-2 py-1 text-sm text-text hover:bg-surface-2"
+        className="group mt-2 flex cursor-pointer items-center gap-1 px-3 py-1 text-[10px] font-semibold uppercase tracking-[0.14em] text-text-muted hover:text-text"
         onClick={() => setExpanded((v) => !v)}
       >
         <button className="rounded p-0.5 hover:bg-surface-offset">
@@ -188,7 +189,6 @@ export function HeapsPanel() {
             <ChevronRight className="h-3 w-3" />
           )}
         </button>
-        <ShoppingBasket className="h-4 w-4 text-text-muted" />
         <span className="flex-1 truncate">Heaps</span>
         <button
           onClick={(e) => {
@@ -196,7 +196,7 @@ export function HeapsPanel() {
             setCreating(true)
             setExpanded(true)
           }}
-          className="invisible rounded p-0.5 text-text-muted hover:bg-surface-offset hover:text-text group-hover:visible"
+          className="invisible rounded p-0.5 hover:bg-surface-offset hover:text-text group-hover:visible"
           title="New heap"
         >
           <Plus className="h-3 w-3" />
@@ -208,8 +208,8 @@ export function HeapsPanel() {
           {/* Inline create form */}
           {creating && (
             <div
-              className="flex items-center gap-1 px-2 py-1"
-              style={{ paddingLeft: '32px' }}
+              className="flex items-center gap-1 px-2 py-0.5"
+              style={{ paddingLeft: '20px' }}
             >
               <input
                 autoFocus
@@ -224,12 +224,12 @@ export function HeapsPanel() {
                   }
                 }}
                 placeholder="Heap name"
-                className="flex-1 rounded border border-border bg-bg px-2 py-0.5 text-xs text-text focus:border-primary focus:outline-none"
+                className="flex-1 rounded border border-border bg-bg px-2 py-0.5 text-[11px] text-text focus:border-primary focus:outline-none"
               />
               <button
                 onClick={handleCreate}
                 disabled={!newName.trim() || createMutation.isPending}
-                className="rounded bg-primary px-2 py-0.5 text-xs text-white hover:bg-primary/80 disabled:opacity-50"
+                className="rounded bg-primary px-2 py-0.5 text-[11px] text-white hover:bg-primary/80 disabled:opacity-50"
               >
                 Add
               </button>
@@ -238,8 +238,8 @@ export function HeapsPanel() {
 
           {heaps.length === 0 && !creating && (
             <div
-              className="px-2 py-1 text-xs text-text-faint"
-              style={{ paddingLeft: '32px' }}
+              className="px-2 py-0.5 text-[11px] text-text-faint"
+              style={{ paddingLeft: '20px' }}
             >
               No heaps yet
             </div>
@@ -264,7 +264,7 @@ export function HeapsPanel() {
               <div
                 key={heap.id}
                 className={clsx(
-                  'group relative flex cursor-pointer items-center gap-1 rounded px-2 py-1 text-[13px]',
+                  'group relative flex cursor-pointer items-center gap-1 rounded px-2 py-0.5 text-[12px]',
                   isFiltered ? 'bg-primary/20 text-primary' : 'text-text hover:bg-surface-2',
                   // Active-heap row gets a soft primary wash so the
                   // user always knows where Pick / T will land, even
@@ -272,7 +272,7 @@ export function HeapsPanel() {
                   isActive && !isFiltered && 'bg-primary/8 text-text',
                   isDropTarget && 'ring-2 ring-primary bg-primary/10'
                 )}
-                style={{ paddingLeft: '32px' }}
+                style={{ paddingLeft: '20px' }}
                 onClick={() => {
                   if (isRenaming) return
                   navigateToSection(`heap-${heap.id}`, { heapId: heap.id })
@@ -311,7 +311,7 @@ export function HeapsPanel() {
               >
                 <ShoppingBasket
                   className={clsx(
-                    'h-4 w-4 flex-shrink-0',
+                    'h-3.5 w-3.5 flex-shrink-0',
                     isActive || isFiltered ? 'text-primary' : 'text-text-muted'
                   )}
                 />
@@ -361,11 +361,11 @@ export function HeapsPanel() {
                  *  on the name above; the standalone Target indicator
                  *  was making heap counts sit left of the others. */}
                 {heap.photo_count > 0 ? (
-                  <span className="flex h-5 min-w-[24px] flex-shrink-0 items-center justify-center rounded bg-surface-offset px-1.5 text-xs tabular-nums text-text-muted">
+                  <span className="flex h-4 min-w-[20px] flex-shrink-0 items-center justify-center rounded bg-surface-offset px-1 text-[10px] tabular-nums text-text-muted">
                     {heap.photo_count}
                   </span>
                 ) : (
-                  <span className="h-5 min-w-[24px] flex-shrink-0" aria-hidden="true" />
+                  <span className="h-4 min-w-[20px] flex-shrink-0" aria-hidden="true" />
                 )}
                 {!isActive && (
                   <button
diff --git a/frontend/src/components/layout/LeftSidebar.tsx b/frontend/src/components/layout/LeftSidebar.tsx
index e719003..29b7375 100644
--- a/frontend/src/components/layout/LeftSidebar.tsx
+++ b/frontend/src/components/layout/LeftSidebar.tsx
@@ -395,19 +395,31 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
     const isSelected = isItemActive(item.id)
     const acceptsDrop = isDropTarget(item.id)
     const isDropHover = dropTargetId === item.id
+    // Top-level entries (Views, Folders) render as small uppercase
+    // section eyebrows rather than another tree row, so the panel reads
+    // as distinct sections with the actual items beneath them.
+    const isSectionHeader = depth === 0
 
     return (
       <div key={item.id}>
         <div
           className={clsx(
-            'group flex cursor-pointer items-center gap-1 rounded px-2 py-1 text-sm',
-            isSelected ? 'bg-primary/20 text-primary' : 'text-text hover:bg-surface-2',
+            'group flex cursor-pointer items-center gap-1',
+            isSectionHeader
+              ? 'mt-2 px-3 py-1 text-[10px] font-semibold uppercase tracking-[0.14em] text-text-muted hover:text-text'
+              : clsx(
+                  'rounded px-2 py-0.5 text-[12px]',
+                  isSelected ? 'bg-primary/20 text-primary' : 'text-text hover:bg-surface-2'
+                ),
             isDropHover && (item.id === 'discarded'
               ? 'ring-2 ring-reject bg-reject/10'
-              : 'ring-2 ring-primary bg-primary/10'),
-            depth > 0 && 'text-[13px]'
+              : 'ring-2 ring-primary bg-primary/10')
           )}
-          style={{ paddingLeft: `${8 + depth * 16}px` }}
+          style={
+            isSectionHeader
+              ? undefined
+              : { paddingLeft: `${8 + (depth - 1) * 12}px` }
+          }
           onClick={() => {
             if (renamingId === item.id) return
             // Folder rows are always filterable, parent or leaf — clicking
@@ -470,13 +482,19 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
               )}
             </button>
           ) : (
-            <div className="w-4" />
+            !isSectionHeader && <div className="w-3" />
           )}
 
-          {/* Item Icon */}
-          {item.icon && (
-            <span className={clsx('flex-shrink-0', isSelected ? 'text-primary' : 'text-text-muted')}>
-              {item.icon}
+          {/* Item Icon — section headers drop their icon in favor of the
+           *  uppercase eyebrow label. */}
+          {item.icon && !isSectionHeader && (
+            <span
+              className={clsx(
+                'flex-shrink-0',
+                isSelected ? 'text-primary' : 'text-text-muted'
+              )}
+            >
+              <span className="[&>svg]:h-3.5 [&>svg]:w-3.5">{item.icon}</span>
             </span>
           )}
 
@@ -510,13 +528,16 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
           )}
 
           {/* Count Badge — fixed-width slot so counts line up in a column
-           *  across rows regardless of digit count. */}
-          {item.count !== undefined && item.count > 0 ? (
-            <span className="flex h-5 min-w-[24px] flex-shrink-0 items-center justify-center rounded bg-surface-offset px-1.5 text-xs tabular-nums text-text-muted">
-              {item.count}
-            </span>
-          ) : (
-            <span className="h-5 min-w-[24px] flex-shrink-0" aria-hidden="true" />
+           *  across rows regardless of digit count. Section headers skip
+           *  the badge entirely (they're labels, not navigable rows). */}
+          {!isSectionHeader && (
+            item.count !== undefined && item.count > 0 ? (
+              <span className="flex h-4 min-w-[20px] flex-shrink-0 items-center justify-center rounded bg-surface-offset px-1 text-[10px] tabular-nums text-text-muted">
+                {item.count}
+              </span>
+            ) : (
+              <span className="h-4 min-w-[20px] flex-shrink-0" aria-hidden="true" />
+            )
           )}
 
           {/* Folder kebab menu — only on folder rows. Hidden (display:none)
@@ -658,15 +679,17 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
     <div className="flex h-full flex-col bg-surface">
       {/* Header with collapse button. Matches the right sidebar header
        *  so both panels have symmetric affordances. */}
-      <div className="flex h-11 flex-shrink-0 items-center justify-between border-b border-border px-4">
-        <h2 className="text-sm font-semibold text-text">Library</h2>
+      <div className="flex h-9 flex-shrink-0 items-center justify-between border-b border-border px-3">
+        <h2 className="text-[11px] font-semibold uppercase tracking-[0.14em] text-text-muted">
+          Library
+        </h2>
         <button
           onClick={onCollapse}
-          className="rounded p-1 text-text-muted hover:bg-surface-2 hover:text-text"
+          className="rounded p-0.5 text-text-muted hover:bg-surface-2 hover:text-text"
           title="Collapse panel (Tab)"
           aria-label="Collapse panel"
         >
-          <PanelLeftClose className="h-4 w-4" />
+          <PanelLeftClose className="h-3.5 w-3.5" />
         </button>
       </div>
       {/* Active heap card — pinned just below the Library header so
@@ -675,20 +698,20 @@ export function LeftSidebar({ onCollapse, onOpenSettings }: LeftSidebarProps) {
       <ActiveHeapCard />
 
       {/* Tree View */}
-      <div className="flex-1 overflow-y-auto py-2">
+      <div className="flex-1 overflow-y-auto pb-2">
         {libraryTree.map((item) => renderTreeItem(item))}
         <HeapsPanel />
       </div>
 
       {/* Settings entry point — pinned to the bottom of the panel so it
        *  sits out of the way of the library tree but is always reachable. */}
-      <div className="border-t border-border p-2">
+      <div className="border-t border-border p-1.5">
         <button
           onClick={onOpenSettings}
-          className="flex w-full items-center gap-2 rounded px-2 py-1.5 text-sm text-text-muted hover:bg-surface-2 hover:text-text"
+          className="flex w-full items-center gap-2 rounded px-2 py-1 text-[12px] text-text-muted hover:bg-surface-2 hover:text-text"
           title="Settings"
         >
-          <Settings className="h-4 w-4" />
+          <Settings className="h-3.5 w-3.5" />
           Settings
         </button>
       </div>
diff --git a/frontend/src/components/layout/RightSidebar.tsx b/frontend/src/components/layout/RightSidebar.tsx
index c40f1dc..f966dbf 100644
--- a/frontend/src/components/layout/RightSidebar.tsx
+++ b/frontend/src/components/layout/RightSidebar.tsx
@@ -149,26 +149,28 @@ export function RightSidebar({ onCollapse }: RightSidebarProps) {
         : `${selectedPhotos.length} Photos Selected`
 
   const Header = () => (
-    <div className="flex h-11 flex-shrink-0 items-center justify-between border-b border-border px-4">
-      <h2 className="text-sm font-semibold text-text">{headerTitle}</h2>
-      <div className="flex items-center gap-1">
+    <div className="flex h-9 flex-shrink-0 items-center justify-between border-b border-border px-3">
+      <h2 className="text-[11px] font-semibold uppercase tracking-[0.14em] text-text-muted">
+        {headerTitle}
+      </h2>
+      <div className="flex items-center gap-0.5">
         {selectedPhotos.length > 0 && (
           <button
             onClick={clearSelection}
-            className="rounded p-1 text-text-muted hover:bg-surface-2 hover:text-text"
+            className="rounded p-0.5 text-text-muted hover:bg-surface-2 hover:text-text"
             title="Clear selection (Esc)"
             aria-label="Clear selection"
           >
-            <X className="h-4 w-4" />
+            <X className="h-3.5 w-3.5" />
           </button>
         )}
         <button
           onClick={onCollapse}
-          className="rounded p-1 text-text-muted hover:bg-surface-2 hover:text-text"
+          className="rounded p-0.5 text-text-muted hover:bg-surface-2 hover:text-text"
           title="Collapse panel (I)"
           aria-label="Collapse panel"
         >
-          <PanelRightClose className="h-4 w-4" />
+          <PanelRightClose className="h-3.5 w-3.5" />
         </button>
       </div>
     </div>
@@ -206,8 +208,8 @@ export function RightSidebar({ onCollapse }: RightSidebarProps) {
     <div className="flex h-full flex-col bg-surface">
       <Header />
 
-      <div className="space-y-3 border-b border-border p-4">
-        <p className="text-xs text-text-muted">
+      <div className="space-y-2.5 border-b border-border p-3">
+        <p className="text-[11px] text-text-muted">
           Rating, color, and flag apply to all {selectedPhotos.length} selected.
         </p>
 
diff --git a/frontend/src/components/sidebar/PhotoInfoPanel.tsx b/frontend/src/components/sidebar/PhotoInfoPanel.tsx
index 9a2fe81..bed4880 100644
--- a/frontend/src/components/sidebar/PhotoInfoPanel.tsx
+++ b/frontend/src/components/sidebar/PhotoInfoPanel.tsx
@@ -301,7 +301,7 @@ export function PhotoInfoPanel({ photoId, darkTheme = false }: PhotoInfoPanelPro
   return (
     <div className="flex h-full flex-col">
       {/* Edit fields */}
-      <div className="space-y-3 border-b border-border p-4">
+      <div className="space-y-2.5 border-b border-border p-3">
         <div>
           <label className="mb-1 block text-xs text-text-muted">Filename</label>
           <input
@@ -594,16 +594,16 @@ function Section({
     <div className="border-b border-border">
       <button
         onClick={onToggle}
-        className="flex w-full items-center justify-between px-4 py-2 text-sm hover:bg-surface-2"
+        className="flex w-full items-center justify-between px-3 py-1.5 text-[10px] font-semibold uppercase tracking-[0.14em] text-text-muted hover:bg-surface-2 hover:text-text"
       >
-        <span className="font-medium text-text">{title}</span>
+        <span>{title}</span>
         {expanded ? (
-          <ChevronDown className="h-4 w-4 text-text-muted" />
+          <ChevronDown className="h-3 w-3" />
         ) : (
-          <ChevronRight className="h-4 w-4 text-text-muted" />
+          <ChevronRight className="h-3 w-3" />
         )}
       </button>
-      {expanded && <div className="px-4 pb-3">{children}</div>}
+      {expanded && <div className="px-3 pb-2.5">{children}</div>}
     </div>
   )
 }