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lib/theme/app_text_styles.dart

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+import 'package:flutter/material.dart';
+import 'package:google_fonts/google_fonts.dart';
+import 'app_colors.dart';
+
+/// Typography styles following the design spec
+/// Uses Nunito font family from Google Fonts
+class AppTextStyles {
+  // App Title
+  static final appTitle = GoogleFonts.nunito(
+    fontSize: 24,
+    fontWeight: FontWeight.w700, // Bold
+    color: AppColors.textPrimary,
+  );
+
+  // Timer Display
+  static final timerDisplay = GoogleFonts.nunito(
+    fontSize: 64,
+    fontWeight: FontWeight.w800, // ExtraBold
+    letterSpacing: 2,
+    color: AppColors.textPrimary,
+  );
+
+  // Button Text
+  static final buttonText = GoogleFonts.nunito(
+    fontSize: 18,
+    fontWeight: FontWeight.w600, // SemiBold
+    color: AppColors.white,
+  );
+
+  // Body Text
+  static final bodyText = GoogleFonts.nunito(
+    fontSize: 16,
+    fontWeight: FontWeight.w400, // Regular
+    color: AppColors.textPrimary,
+  );
+
+  // Helper Text
+  static final helperText = GoogleFonts.nunito(
+    fontSize: 14,
+    fontWeight: FontWeight.w300, // Light
+    color: AppColors.textSecondary,
+  );
+
+  // Headline
+  static final headline = GoogleFonts.nunito(
+    fontSize: 20,
+    fontWeight: FontWeight.w600, // SemiBold
+    color: AppColors.textPrimary,
+  );
+
+  // Large number (for focus minutes display)
+  static final largeNumber = GoogleFonts.nunito(
+    fontSize: 32,
+    fontWeight: FontWeight.w700, // Bold
+    color: AppColors.textPrimary,
+  );
+
+  // Encouragement quote (italic)
+  static final encouragementQuote = GoogleFonts.nunito(
+    fontSize: 16,
+    fontWeight: FontWeight.w400,
+    fontStyle: FontStyle.italic,
+    color: AppColors.textSecondary,
+  );
+
+  // Prevent instantiation
+  AppTextStyles._();
+}