diff --git a/src/components/AiActionCard.tsx b/src/components/AiActionCard.tsx
index 520499f5..5a3c2d4a 100644
--- a/src/components/AiActionCard.tsx
+++ b/src/components/AiActionCard.tsx
@@ -74,7 +74,7 @@ function DetailBlock({ label, content, isError }: {
     <div style={{ marginTop: 6 }}>
       <div
         className="text-muted-foreground"
-        style={{ fontSize: 10, fontWeight: 600, textTransform: 'uppercase', marginBottom: 2 }}
+        style={{ fontSize: 10, fontWeight: 600, marginBottom: 2 }}
       >
         {label}
       </div>
diff --git a/src/components/CommandPalette.test.tsx b/src/components/CommandPalette.test.tsx
index 3e7634f1..e0974ae5 100644
--- a/src/components/CommandPalette.test.tsx
+++ b/src/components/CommandPalette.test.tsx
@@ -208,7 +208,8 @@ describe('CommandPalette', () => {
       const groupHeaders = screen.getAllByText(
         (_content, el) =>
           el?.tagName === 'DIV' &&
-          el.classList.contains('uppercase') &&
+          el.classList.contains('text-[11px]') &&
+          el.classList.contains('font-medium') &&
           !!el.textContent,
       ).map(el => el.textContent)
 
diff --git a/src/components/CommandPalette.tsx b/src/components/CommandPalette.tsx
index 0197d2e5..d10984e0 100644
--- a/src/components/CommandPalette.tsx
+++ b/src/components/CommandPalette.tsx
@@ -140,7 +140,7 @@ export function CommandPalette({ open, commands, onClose }: CommandPaletteProps)
               runningIndex += items.length
               return (
                 <div key={group}>
-                  <div className="px-4 pb-1 pt-2 text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
+                  <div className="px-4 pb-1 pt-2 text-[11px] font-medium text-muted-foreground">
                     {group}
                   </div>
                   {items.map((cmd, i) => {
diff --git a/src/components/CreateNoteDialog.tsx b/src/components/CreateNoteDialog.tsx
index 0c107a05..01ef422c 100644
--- a/src/components/CreateNoteDialog.tsx
+++ b/src/components/CreateNoteDialog.tsx
@@ -55,7 +55,7 @@ export function CreateNoteDialog({ open, onClose, onCreate, defaultType, customT
         </DialogHeader>
         <form onSubmit={handleSubmit} className="space-y-4">
           <div className="space-y-1.5">
-            <label className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
+            <label className="text-xs font-medium text-muted-foreground">
               Title
             </label>
             <Input
@@ -66,7 +66,7 @@ export function CreateNoteDialog({ open, onClose, onCreate, defaultType, customT
             />
           </div>
           <div className="space-y-1.5">
-            <label className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
+            <label className="text-xs font-medium text-muted-foreground">
               Type
             </label>
             <div className="flex flex-wrap gap-1.5">
diff --git a/src/components/CreateTypeDialog.tsx b/src/components/CreateTypeDialog.tsx
index 14bf7bf2..ebfb72d0 100644
--- a/src/components/CreateTypeDialog.tsx
+++ b/src/components/CreateTypeDialog.tsx
@@ -36,7 +36,7 @@ export function CreateTypeDialog({ open, onClose, onCreate }: CreateTypeDialogPr
         </DialogHeader>
         <form onSubmit={handleSubmit} className="space-y-4">
           <div className="space-y-1.5">
-            <label className="text-xs font-medium uppercase tracking-wide text-muted-foreground">
+            <label className="text-xs font-medium text-muted-foreground">
               Type Name
             </label>
             <Input
diff --git a/src/components/DynamicPropertiesPanel.test.tsx b/src/components/DynamicPropertiesPanel.test.tsx
index 1351266c..8c069b22 100644
--- a/src/components/DynamicPropertiesPanel.test.tsx
+++ b/src/components/DynamicPropertiesPanel.test.tsx
@@ -112,7 +112,7 @@ describe('DynamicPropertiesPanel', () => {
         frontmatter={{ Status: 'Active' }}
       />
     )
-    // Status rendered with CSS text-transform: uppercase, DOM text is still "Active"
+    // Status rendered as sentence case
     expect(screen.getByTestId('status-badge')).toBeInTheDocument()
   })
 
diff --git a/src/components/PulseView.tsx b/src/components/PulseView.tsx
index a072c3cc..21a2c23e 100644
--- a/src/components/PulseView.tsx
+++ b/src/components/PulseView.tsx
@@ -167,7 +167,7 @@ function DayGroup({ label, commits, onOpenNote }: {
         onClick={() => setCollapsed((v) => !v)}
       >
         <Chevron size={12} className="text-muted-foreground" />
-        <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">
+        <span className="text-[11px] font-medium text-muted-foreground">
           {label}
         </span>
         <span className="text-[11px] text-muted-foreground">
diff --git a/src/components/Sidebar.tsx b/src/components/Sidebar.tsx
index 6be6f01b..eae15b62 100644
--- a/src/components/Sidebar.tsx
+++ b/src/components/Sidebar.tsx
@@ -315,7 +315,7 @@ export const Sidebar = memo(function Sidebar({
         {/* Sections header + visibility popover */}
         <div ref={customizeRef} style={{ position: 'relative', padding: '4px 6px 0' }}>
           <div className="flex w-full select-none items-center justify-between" style={{ padding: '4px 16px' }}>
-            <span className="text-[11px] font-semibold uppercase tracking-wider text-muted-foreground">Sections</span>
+            <span className="text-[11px] font-medium text-muted-foreground">Sections</span>
             <button className="flex shrink-0 cursor-pointer items-center justify-center rounded border-none bg-transparent p-0 text-muted-foreground transition-colors hover:text-foreground" style={{ width: 20, height: 20 }} onClick={() => setShowCustomize((v) => !v)} aria-label="Customize sections" title="Customize sections">
               <SlidersHorizontal size={14} />
             </button>
diff --git a/src/components/StatusDropdown.tsx b/src/components/StatusDropdown.tsx
index 89846b34..ff37fb64 100644
--- a/src/components/StatusDropdown.tsx
+++ b/src/components/StatusDropdown.tsx
@@ -13,11 +13,10 @@ export function StatusPill({ status, className }: { status: string; className?:
         color: style.color,
         borderRadius: 16,
         padding: '1px 6px',
-        fontFamily: "'IBM Plex Mono', monospace",
+        fontFamily: "'Inter', sans-serif",
         fontSize: 10,
         fontWeight: 600,
         letterSpacing: '0',
-        textTransform: 'uppercase' as const,
         maxWidth: 160,
       }}
       title={status}
@@ -98,11 +97,10 @@ function StatusOption({
 }
 
 const SECTION_LABEL_STYLE = {
-  fontFamily: "'IBM Plex Mono', monospace",
+  fontFamily: "'Inter', sans-serif",
   fontSize: 9,
   fontWeight: 500,
   letterSpacing: '0',
-  textTransform: 'uppercase' as const,
 }
 
 function SectionLabel({ children }: { children: string }) {
diff --git a/src/components/TagsDropdown.tsx b/src/components/TagsDropdown.tsx
index a5303152..7afeca72 100644
--- a/src/components/TagsDropdown.tsx
+++ b/src/components/TagsDropdown.tsx
@@ -13,11 +13,10 @@ export function TagPill({ tag, className }: { tag: string; className?: string })
         color: style.color,
         borderRadius: 16,
         padding: '1px 6px',
-        fontFamily: "'IBM Plex Mono', monospace",
+        fontFamily: "'Inter', sans-serif",
         fontSize: 10,
         fontWeight: 600,
-        letterSpacing: '1.2px',
-        textTransform: 'uppercase' as const,
+        letterSpacing: '0',
         maxWidth: 160,
       }}
       title={tag}
@@ -90,11 +89,10 @@ function TagOption({
 }
 
 const SECTION_LABEL_STYLE = {
-  fontFamily: "'IBM Plex Mono', monospace",
+  fontFamily: "'Inter', sans-serif",
   fontSize: 9,
   fontWeight: 500,
-  letterSpacing: '1.2px',
-  textTransform: 'uppercase' as const,
+  letterSpacing: '0',
 }
 
 function SectionLabel({ children }: { children: string }) {
diff --git a/src/components/TypeCustomizePopover.test.tsx b/src/components/TypeCustomizePopover.test.tsx
index ca38c831..7c6c8389 100644
--- a/src/components/TypeCustomizePopover.test.tsx
+++ b/src/components/TypeCustomizePopover.test.tsx
@@ -66,9 +66,9 @@ describe('TypeCustomizePopover', () => {
 
   it('renders color, icon, and template sections', () => {
     renderPopover()
-    expect(screen.getByText('COLOR')).toBeInTheDocument()
-    expect(screen.getByText('ICON')).toBeInTheDocument()
-    expect(screen.getByText('TEMPLATE')).toBeInTheDocument()
+    expect(screen.getByText('Color')).toBeInTheDocument()
+    expect(screen.getByText('Icon')).toBeInTheDocument()
+    expect(screen.getByText('Template')).toBeInTheDocument()
     expect(screen.getByText('Done')).toBeInTheDocument()
   })
 
diff --git a/src/components/TypeCustomizePopover.tsx b/src/components/TypeCustomizePopover.tsx
index 215826ba..27438407 100644
--- a/src/components/TypeCustomizePopover.tsx
+++ b/src/components/TypeCustomizePopover.tsx
@@ -75,7 +75,7 @@ export function TypeCustomizePopover({
       onContextMenu={(e) => e.stopPropagation()}
     >
       {/* Color section */}
-      <div className="font-mono-overline mb-2 text-muted-foreground">COLOR</div>
+      <div className="font-mono-overline mb-2 text-muted-foreground">Color</div>
       <div className="flex gap-2 mb-3 flex-wrap">
         {ACCENT_COLORS.map((c) => (
           <button
@@ -92,7 +92,7 @@ export function TypeCustomizePopover({
       </div>
 
       {/* Icon section */}
-      <div className="font-mono-overline mb-2 text-muted-foreground">ICON</div>
+      <div className="font-mono-overline mb-2 text-muted-foreground">Icon</div>
 
       {/* Search input */}
       <div className="relative mb-2">
@@ -136,7 +136,7 @@ export function TypeCustomizePopover({
       </div>
 
       {/* Template section */}
-      <div className="font-mono-overline mb-2 mt-3 text-muted-foreground">TEMPLATE</div>
+      <div className="font-mono-overline mb-2 mt-3 text-muted-foreground">Template</div>
       <textarea
         value={templateText}
         onChange={(e) => handleTemplateChange(e.target.value)}
diff --git a/src/components/inspector/ReferencedByPanel.tsx b/src/components/inspector/ReferencedByPanel.tsx
index a5e8c99a..9aaee690 100644
--- a/src/components/inspector/ReferencedByPanel.tsx
+++ b/src/components/inspector/ReferencedByPanel.tsx
@@ -31,7 +31,7 @@ export function ReferencedByPanel({ items, typeEntryMap, onNavigate }: {
       <div className="flex flex-col gap-2.5">
         {grouped.map(([viaKey, groupEntries]) => (
           <div key={viaKey}>
-            <span className="mb-1 block font-mono text-muted-foreground" style={{ fontSize: 9, fontWeight: 400, letterSpacing: '1.2px', textTransform: 'uppercase', opacity: 0.7 }}>
+            <span className="mb-1 block text-muted-foreground" style={{ fontSize: 9, fontWeight: 400, letterSpacing: '0.02em', opacity: 0.7 }}>
               ← {viaKey}
             </span>
             <div className="flex flex-col gap-0.5">
diff --git a/src/index.css b/src/index.css
index 7d53c7b9..90617754 100644
--- a/src/index.css
+++ b/src/index.css
@@ -149,22 +149,20 @@
   }
 }
 
-/* --- IBM Plex Mono label styles (from typography scale) --- */
+/* --- Label typography (Inter, sentence case) --- */
 /* t8: Section labels, metadata tags — 11px medium */
 .font-mono-label {
-  font-family: 'IBM Plex Mono', monospace;
+  font-family: 'Inter', sans-serif;
   font-size: 11px;
   font-weight: 500;
-  text-transform: uppercase;
 }
 
 /* t9: Overlines, category labels — 10px regular */
 .font-mono-overline {
-  font-family: 'IBM Plex Mono', monospace;
+  font-family: 'Inter', sans-serif;
   font-size: 10px;
   font-weight: 400;
   letter-spacing: 0.02em;
-  text-transform: uppercase;
 }
 
 .referenced-by-panel button:hover {