diff --git a/.changeset/fruity-cooks-flow.md b/.changeset/fruity-cooks-flow.md
new file mode 100644
index 00000000..23f25d13
--- /dev/null
+++ b/.changeset/fruity-cooks-flow.md
@@ -0,0 +1,6 @@
+---
+"@blockle/blocks-core": patch
+"@blockle/blocks": patch
+---
+
+fix getComponentStyles when using defaults
diff --git a/packages/core/src/theme/getComponentStyles.test.ts b/packages/core/src/theme/getComponentStyles.test.ts
index 0fa93618..f6d4439b 100644
--- a/packages/core/src/theme/getComponentStyles.test.ts
+++ b/packages/core/src/theme/getComponentStyles.test.ts
@@ -47,14 +47,6 @@ describe('getComponentStyles', () => {
     expect(result).toBe('btn-sm');
   });
 
-  it('should apply multiple variant styles', () => {
-    const result = getComponentStyles(testTheme, 'button', {
-      variants: { size: 'large' },
-    });
-
-    expect(result).toBe('btn-lg');
-  });
-
   it('should combine root and variant styles', () => {
     const result = getComponentStyles(testTheme, 'button', {
       root: true,
@@ -332,7 +324,7 @@ describe('getComponentStyles', () => {
     expect(result).toBe('btn-base btn-elevated');
   });
 
-  it('should handle non-existent variant values gracefully', () => {
+  it('should return empty string for non-existent variant values', () => {
     const result = getComponentStyles(testTheme, 'button', {
       variants: { size: 'medium' as unknown as 'small' | 'large' },
     });
@@ -371,4 +363,123 @@ describe('getComponentStyles', () => {
       'btn-base btn-full-width btn-sm btn-primary btn-small-primary',
     );
   });
+
+  it('should return empty string when no style props provided', () => {
+    const result = getComponentStyles(testTheme, 'button', {});
+
+    expect(result).toBe('');
+  });
+
+  it('should ignore variants when component has no variants defined', () => {
+    const minimalTheme = {
+      components: {
+        button: {
+          root: 'btn-base',
+          variants: {},
+        },
+      },
+    } satisfies Partial<Theme> as unknown as Theme;
+
+    const result = getComponentStyles(minimalTheme, 'button', {
+      root: true,
+      variants: { size: 'small' },
+    });
+
+    expect(result).toBe('btn-base');
+  });
+
+  it('should handle compound variants with partial match from defaults', () => {
+    const themeWithCompound = {
+      components: {
+        button: {
+          root: 'btn-base',
+          variants: {
+            size: { small: 'btn-sm', large: 'btn-lg' },
+            intent: { primary: 'btn-primary', secondary: 'btn-secondary' },
+          },
+          defaultVariants: { intent: 'primary' },
+          compoundVariants: [
+            {
+              variants: { size: 'small', intent: 'primary' },
+              style: 'btn-small-primary',
+            },
+          ],
+        },
+      },
+    } satisfies Partial<Theme> as unknown as Theme;
+
+    const result = getComponentStyles(themeWithCompound, 'button', {
+      variants: { size: 'small' },
+    });
+
+    expect(result).toBe('btn-sm btn-primary btn-small-primary');
+  });
+
+  it('should handle empty compoundVariants array', () => {
+    const themeWithEmptyCompound = {
+      components: {
+        button: {
+          root: 'btn-base',
+          variants: {
+            size: { small: 'btn-sm', large: 'btn-lg' },
+          },
+          compoundVariants: [],
+        },
+      },
+    } satisfies Partial<Theme> as unknown as Theme;
+
+    const result = getComponentStyles(themeWithEmptyCompound, 'button', {
+      variants: { size: 'small' },
+    });
+
+    expect(result).toBe('btn-sm');
+  });
+
+  it('should prioritize provided variants over default variants in compound matching', () => {
+    const themeWithCompound = {
+      components: {
+        button: {
+          root: 'btn-base',
+          variants: {
+            size: { small: 'btn-sm', large: 'btn-lg' },
+            intent: { primary: 'btn-primary', secondary: 'btn-secondary' },
+          },
+          defaultVariants: { size: 'large', intent: 'secondary' },
+          compoundVariants: [
+            {
+              variants: { size: 'small', intent: 'primary' },
+              style: 'btn-small-primary',
+            },
+          ],
+        },
+      },
+    } satisfies Partial<Theme> as unknown as Theme;
+
+    const result = getComponentStyles(themeWithCompound, 'button', {
+      variants: { size: 'small', intent: 'primary' },
+    });
+
+    expect(result).toBe('btn-sm btn-primary btn-small-primary');
+  });
+
+  it('should handle mixed string and boolean variants', () => {
+    const mixedTheme = {
+      components: {
+        button: {
+          root: 'btn-base',
+          variants: {
+            size: { small: 'btn-sm', large: 'btn-lg' },
+            disabled: 'btn-disabled',
+            loading: 'btn-loading',
+          },
+        },
+      },
+    } satisfies Partial<Theme> as unknown as Theme;
+
+    const result = getComponentStyles(mixedTheme, 'button', {
+      variants: { size: 'small', disabled: true, loading: false },
+    });
+
+    expect(result).toBe('btn-sm btn-disabled');
+  });
 });
diff --git a/packages/core/src/theme/getComponentStyles.ts b/packages/core/src/theme/getComponentStyles.ts
index c60092b0..90666723 100644
--- a/packages/core/src/theme/getComponentStyles.ts
+++ b/packages/core/src/theme/getComponentStyles.ts
@@ -31,11 +31,6 @@ export function getComponentStyles<T extends keyof ComponentThemesProps>(
     }
   }
 
-  // No variants for component, return early
-  if (!componentVariants) {
-    return classNames.join(' ');
-  }
-
   const defaultVariants = useDefaultVariants ? component.defaultVariants : null;
 
   for (const key in componentVariants) {