diff --git a/app/src/main/kotlin/com/shonar/desktop/Theme.kt b/app/src/main/kotlin/com/shonar/desktop/Theme.kt
index 1a231be..763a378 100644
--- a/app/src/main/kotlin/com/shonar/desktop/Theme.kt
+++ b/app/src/main/kotlin/com/shonar/desktop/Theme.kt
@@ -91,31 +91,44 @@ private val ShonarShapes = Shapes(
 
 // Typography hierarchy per the reference: page title 22/700 wide
 // tracking; section 16/600; item title 15/600; body 14; metadata 13
-// muted; labels 12–13.
+// muted; labels 12–13. Line heights are explicit everywhere: the
+// summary is the product's reading surface and 1.0 leading read as a
+// dense wall; each tier now separates by size AND rhythm, not weight
+// alone.
 private val ShonarTypography = Typography(
     headlineSmall = TextStyle(
         fontSize = 22.sp, fontWeight = FontWeight.Bold,
-        letterSpacing = 0.5.sp, color = Shonar.TextPrimary,
+        letterSpacing = 0.5.sp, lineHeight = 28.sp,
+        color = Shonar.TextPrimary,
     ),
     titleMedium = TextStyle(
-        fontSize = 16.sp, fontWeight = FontWeight.SemiBold,
-        color = Shonar.TextPrimary,
+        fontSize = 17.sp, fontWeight = FontWeight.SemiBold,
+        lineHeight = 24.sp, color = Shonar.TextPrimary,
     ),
     titleSmall = TextStyle(
         fontSize = 15.sp, fontWeight = FontWeight.SemiBold,
+        letterSpacing = 0.2.sp, lineHeight = 22.sp,
         color = Shonar.TextPrimary,
     ),
-    bodyLarge = TextStyle(fontSize = 15.sp, color = Shonar.TextPrimary),
-    bodyMedium = TextStyle(fontSize = 14.sp, color = Shonar.TextPrimary),
-    bodySmall = TextStyle(fontSize = 13.sp, color = Shonar.TextSecondary),
+    bodyLarge = TextStyle(
+        fontSize = 16.sp, lineHeight = 25.sp, color = Shonar.TextPrimary,
+    ),
+    bodyMedium = TextStyle(
+        fontSize = 14.sp, lineHeight = 21.sp, color = Shonar.TextPrimary,
+    ),
+    bodySmall = TextStyle(
+        fontSize = 13.sp, lineHeight = 18.sp, color = Shonar.TextSecondary,
+    ),
     labelLarge = TextStyle(
-        fontSize = 14.sp, fontWeight = FontWeight.Medium,
+        fontSize = 14.sp, fontWeight = FontWeight.Medium, lineHeight = 18.sp,
     ),
     labelMedium = TextStyle(
-        fontSize = 13.sp, fontWeight = FontWeight.Medium,
+        fontSize = 13.sp, fontWeight = FontWeight.Medium, lineHeight = 17.sp,
         color = Shonar.TextSecondary,
     ),
-    labelSmall = TextStyle(fontSize = 12.sp, color = Shonar.TextMuted),
+    labelSmall = TextStyle(
+        fontSize = 12.sp, lineHeight = 16.sp, color = Shonar.TextMuted,
+    ),
 )
 
 private val ShonarDarkScheme = darkColorScheme(