diff --git a/frontend-mobile/constants/theme.ts b/frontend-mobile/constants/theme.ts
new file mode 100644
index 0000000..1abd72b
--- /dev/null
+++ b/frontend-mobile/constants/theme.ts
@@ -0,0 +1,58 @@
+export const colors = {
+  // Primary
+  primary: '#007AFF',
+  primaryLight: '#4DA3FF',
+  primaryDark: '#0056CC',
+
+  // Semantic
+  success: '#34C759',
+  danger: '#FF3B30',
+  warning: '#FF9500',
+
+  // Neutral
+  background: '#F2F2F7',
+  card: '#FFFFFF',
+  border: '#E5E5EA',
+  separator: '#C6C6C8',
+
+  // Text
+  text: '#1C1C1E',
+  textSecondary: '#8E8E93',
+  textInverse: '#FFFFFF',
+  textLink: '#007AFF',
+};
+
+export const spacing = {
+  xs: 4,
+  sm: 8,
+  md: 16,
+  lg: 24,
+  xl: 32,
+  xxl: 48,
+};
+
+export const borderRadius = {
+  sm: 8,
+  md: 12,
+  lg: 16,
+  xl: 24,
+};
+
+export const typography = {
+  title: {
+    fontSize: 28,
+    fontWeight: 'bold' as const,
+  },
+  heading: {
+    fontSize: 20,
+    fontWeight: '600' as const,
+  },
+  body: {
+    fontSize: 16,
+    fontWeight: 'normal' as const,
+  },
+  caption: {
+    fontSize: 12,
+    fontWeight: 'normal' as const,
+  },
+};