Dark mode em upload pdf

docs/USER_GUIDE.md

@@ -17,7 +17,7 @@ Welcome to the AI Study Assistant! This comprehensive guide will help you master
 #### 1. Download and Install
 - **Android**: Download from Google Play Store
 - **iOS**: Download from App Store
-- **Web**: Visit [app.teachit.app](https://app.teachit.app)
+- **Web**: Visit [app.learnit.app](https://app.learnit.app)
 
 #### 2. Create Account
 1. Open the app
@@ -475,8 +475,8 @@ Monitor class performance with:
 - **Tutoring Services**: Additional support
 
 #### Technical Support
-- **Email**: support@teachit.app
-- **Phone**: 1-800-TEACH-IT
+- **Email**: support@learnit.app
+- **Phone**: 1-800-LEARN-IT
 - **Live Chat**: In-app chat support
 - **Community Forum**: User discussions
 
@@ -565,10 +565,10 @@ Monitor class performance with:
 ### Contact Information
 
 #### Support Channels
-- **Email Support**: support@teachit.app
-- **Phone Support**: 1-800-TEACH-IT
+- **Email Support**: support@learnit.app
+- **Phone Support**: 1-800-LEARN-IT
 - **Live Chat**: In-app support
-- **Social Media**: @TeachItApp
+- **Social Media**: @LearnItApp
 
 #### School Support
 - **IT Department**: Technical assistance
@@ -602,10 +602,10 @@ Monitor class performance with:
 - **Esc**: Cancel/close
 
 ### Emergency Contacts
-- **Technical Issues**: support@teachit.app
-- **Account Problems**: admin@teachit.app
-- **Security Concerns**: security@teachit.app
-- **Emergency**: 1-800-TEACH-IT
+- **Technical Issues**: support@learnit.app
+- **Account Problems**: admin@learnit.app
+- **Security Concerns**: security@learnit.app
+- **Emergency**: 1-800-LEARN-IT
 
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