Add UI Design Preview Folder README.md for Card Theme

ui-design/card-themes/README.md

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+# 📦 UI Card Theme Variations
+
+Designed by: **Anushka Varshney**  
+Date: **August 2025**
+
+This folder contains three unique UI card theme previews created as part of [Issue #83](https://github.com/Loop-Hive/ScheduleX/issues/83) for ScheduleX. Each card variation follows the specifications provided in the issue and supports both light and dark modes.
+
+---
+
+## 🌐 Theme Previews
+
+### 1. Glassmorphism
+- 🔲 **Shape**: Rounded
+- 🧊 **Style**: Image background with blur effect
+- 🧥 **Shadow**: Soft glow and elevation
+- 🌗 **Mode**: Light/Dark compatible
+
+### 2. Neumorphism
+- 🔲 **Shape**: Softly rounded edges
+- 💡 **Style**: Raised surface look with inner shadows
+- 🧥 **Shadow**: Deep + soft shadow layering
+- 🎨 **Accent**: Minimalist tones, clean layout
+- 🌗 **Mode**: Best suited for light themes
+
+### 3. Flat Design
+- 🔲 **Shape**: Sharp and flat
+- 💡 **Style**: No shadows, high clarity
+- 🖌️ **Accent**: Bold borders, hover highlights
+- 🌗 **Mode**: Versatile for all themes
+
+---
+
+## 🖼️ File Structure
+
+```bash
+card-themes/
+│
+├── glassmorphism.png
+├── neumorphism.png
+├── flat.png
+└── README.md
+```
+
+---
+
+## ✅ Notes
+
+- Designs are made in **Figma**
+- Exported as `.png` for quick preview
+- Follows responsive layout guidelines
+- Aligned with overall ScheduleX UI direction
+
+---
+
+Thank you! Feel free to review and suggest changes. 😊