feat : Librairie de base

src/app/_layout.tsx

@@ -1,5 +1,11 @@
-import { Stack } from "expo-router";
+import { Stack } from 'expo-router';
+
+import { ThemeProvider } from '../theme';
 
 export default function RootLayout() {
-  return <Stack />;
+  return (
+    <ThemeProvider>
+      <Stack />
+    </ThemeProvider>
+  );
 }

src/app/index.tsx

@@ -1,17 +1,48 @@
-import { Text, View, StyleSheet } from "react-native";
+import { StyleSheet, Text, View } from 'react-native';
+
+import '../global.css';
+import { useTheme } from '../theme';
 
 export default function Index() {
+  const { colors, spacing, typography } = useTheme();
+
   return (
     <View style={styles.container}>
-      <Text>Edit src/app/index.tsx to edit this screen.</Text>
-    </View>
+        <Text
+          style={[
+            styles.title,
+            {
+              color: colors.textSecondary,
+              fontFamily: typography.sectionLabel.fontFamily,
+              fontSize: typography.sectionLabel.fontSize,
+              lineHeight: typography.sectionLabel.lineHeight,
+              letterSpacing: typography.sectionLabel.letterSpacing,
+            },
+          ]}>
+          GradientButton variants
+        </Text>
+      </View>
   );
 }
 
 const styles = StyleSheet.create({
+  safeArea: {
+    flex: 1,
+  },
   container: {
     flex: 1,
-    alignItems: "center",
-    justifyContent: "center",
+    paddingHorizontal: 20,
+    paddingTop: 24,
+    justifyContent: 'center',
+  },
+  title: {
+    textTransform: 'uppercase',
+    marginBottom: 20,
+  },
+  stack: {
+    width: '100%',
+  },
+  disabledWrap: {
+    marginTop: 24,
   },
 });

src/global.css

@@ -0,0 +1,3 @@
+@tailwind base;
+@tailwind components;
+@tailwind utilities;

src/theme/ThemeProvider.tsx

@@ -0,0 +1,20 @@
+import { type PropsWithChildren, useMemo } from 'react';
+
+import colors from './colors';
+import spacing, { borderRadius } from './spacing';
+import typography from './typography';
+import { ThemeContext } from './useTheme';
+
+export function ThemeProvider({ children }: PropsWithChildren) {
+  const value = useMemo(
+    () => ({
+      colors,
+      typography,
+      spacing,
+      borderRadius,
+    }),
+    [],
+  );
+
+  return <ThemeContext.Provider value={value}>{children}</ThemeContext.Provider>;
+}

src/theme/colors.ts

@@ -0,0 +1,17 @@
+export const colors = {
+  deepBackground: '#0A0A12',
+  surface: '#14141F',
+  surfaceElevated: '#1E1E2D',
+  border: '#2A2A3C',
+  primary: '#FF2E88',
+  secondary: '#7B3DFF',
+  tertiary: '#28E0F0',
+  success: '#3DDC97',
+  textPrimary: '#F4F4FA',
+  textSecondary: '#9A9AB4',
+  signatureGradient: ['#7B3DFF', '#FF2E88'] as const,
+} as const;
+
+export const signatureGradient = colors.signatureGradient;
+
+export default colors;

src/theme/index.ts

@@ -0,0 +1,16 @@
+import colors from './colors';
+import spacing, { borderRadius } from './spacing';
+import typography from './typography';
+
+export const theme = {
+  colors,
+  typography,
+  spacing,
+  borderRadius,
+} as const;
+
+export * from './ThemeProvider';
+export * from './useTheme';
+export { borderRadius, colors, spacing, typography };
+
+export default theme;

src/theme/spacing.ts

@@ -0,0 +1,18 @@
+export const spacing = {
+  4: 4,
+  8: 8,
+  12: 12,
+  16: 16,
+  24: 24,
+  32: 32,
+} as const;
+
+export const space = spacing;
+
+export const borderRadius = {
+  card: 20,
+  button: 14,
+  chip: 9999,
+} as const;
+
+export default spacing;

src/theme/typography.ts

@@ -0,0 +1,67 @@
+import { Inter_400Regular, Inter_500Medium } from '@expo-google-fonts/inter';
+import { SpaceGrotesk_600SemiBold, SpaceGrotesk_700Bold } from '@expo-google-fonts/space-grotesk';
+import { useFonts } from 'expo-font';
+
+export const fontFamily = {
+  display: 'SpaceGrotesk_600SemiBold',
+  displayBold: 'SpaceGrotesk_700Bold',
+  body: 'Inter_400Regular',
+  bodyMedium: 'Inter_500Medium',
+  mono: 'monospace',
+} as const;
+
+export const typography = {
+  display: {
+    fontFamily: fontFamily.display,
+    fontSize: 40,
+    lineHeight: 48,
+    letterSpacing: -0.8,
+  },
+  screenTitle: {
+    fontFamily: fontFamily.displayBold,
+    fontSize: 26,
+    lineHeight: 32,
+    letterSpacing: -0.6,
+  },
+  cardTitle: {
+    fontFamily: fontFamily.display,
+    fontSize: 18,
+    lineHeight: 24,
+    letterSpacing: -0.2,
+  },
+  sectionLabel: {
+    fontFamily: fontFamily.mono,
+    fontSize: 11,
+    lineHeight: 16,
+    letterSpacing: 0.8,
+    textTransform: 'uppercase' as const,
+  },
+  body: {
+    fontFamily: fontFamily.body,
+    fontSize: 15,
+    lineHeight: 22,
+    letterSpacing: 0,
+  },
+  metadata: {
+    fontFamily: fontFamily.bodyMedium,
+    fontSize: 13,
+    lineHeight: 18,
+    letterSpacing: 0,
+  },
+  digits: {
+    fontFamily: fontFamily.mono,
+    fontSize: 11,
+    lineHeight: 16,
+    letterSpacing: 0.4,
+  },
+} as const;
+
+export const loadFonts = () =>
+  useFonts({
+    SpaceGrotesk_600SemiBold,
+    SpaceGrotesk_700Bold,
+    Inter_400Regular,
+    Inter_500Medium,
+  });
+
+export default typography;

src/theme/useTheme.ts

@@ -0,0 +1,24 @@
+import { createContext, useContext } from 'react';
+
+import colors from './colors';
+import spacing, { borderRadius } from './spacing';
+import typography from './typography';
+
+export type ThemeContextValue = {
+  colors: typeof colors;
+  typography: typeof typography;
+  spacing: typeof spacing;
+  borderRadius: typeof borderRadius;
+};
+
+export const ThemeContext = createContext<ThemeContextValue | undefined>(undefined);
+
+export const useTheme = () => {
+  const context = useContext(ThemeContext);
+
+  if (!context) {
+    throw new Error('useTheme must be used within a ThemeProvider');
+  }
+
+  return context;
+};