Create a next-generation AI-powered YouTube Video Summarizer & Downloader with an ultra-modern, highly interactive, and visually appealing UI. The website must be built using Google Material Design 3 (M3) components to ensure a clean, responsive, and user-friendly experience.

The primary color theme should be a light purple gradient, providing a sleek and futuristic look. The website must use the Inter font for smooth typography, ensuring maximum readability. Additionally, all icons should be sourced from Google Icons, maintaining a professional and familiar interface.

Key Features:

Intelligent YouTube Summarizer:

Users can paste a YouTube video link, and AI will generate a detailed text summary with important timestamps.

The summary should be structured with key takeaways, bullet points, and action items for tutorials or lectures.

Allow users to copy the summary in one click.

YouTube Video & Audio Downloader:

Provide options to download videos in different resolutions (4K, 1080p, 720p, etc.).

Offer audio-only downloads for podcasts or music.

Show real-time progress while downloading.

API Key Management with a Settings Panel:

A settings icon should be present in the top-right corner, leading to an API key setup page.

Users can enter their own YouTube Data API key to prevent limitations.

A toast notification should appear when an API key is successfully set, with a smooth fade-in/out animation.

Modern, Eye-Catching UI Elements:

Use Google Material 3 (M3) components for buttons, cards, modals, and inputs.

Implement a glassmorphic card design for the video details section.

Smooth hover effects and micro-interactions on every button and input field.

Dynamic Dark & Light Mode:

Auto-detect system theme preferences and allow manual switching.

Ensure smooth transitions between dark and light modes with animated toggle switches.

Search & Auto-Suggest Feature:

When a user pastes a link, fetch and display the video title, thumbnail, and duration instantly.

Offer related videos based on the input URL for quick exploration.

Interactive User Experience:

Animated loading skeletons when fetching summaries.

Confetti animation or small celebration pop-up when a download is successful.

Stylish notification badges for new features and updates.

Performance Optimized & SEO Friendly:

Ensure fast page load speeds with lazy loading.

Use meta tags & structured data to improve search visibility.

Mobile-Responsive & PWA Support:

Fully optimized for mobile and tablets.

Here is my example code ""