# Requirements Document

## Introduction

This feature involves creating a standalone desktop YouTube downloader application using Electron, HTML, and Tailwind CSS. The application will allow users to download YouTube videos by entering a URL, with full system integration for file management and binary execution. The design will be based on the provided Figma file, using exact variables and maintaining visual consistency with the design system.

## Requirements

### Requirement 1

**User Story:** As a user, I want to enter a YouTube URL and download the video, so that I can save videos for offline viewing.

#### Acceptance Criteria

1. WHEN a user enters a valid YouTube URL THEN the system SHALL validate the URL format
2. WHEN a user clicks the download button THEN the system SHALL initiate the download process
3. WHEN the download is in progress THEN the system SHALL display a progress indicator
4. WHEN the download completes THEN the system SHALL provide the downloaded file to the user
5. IF an invalid URL is entered THEN the system SHALL display an appropriate error message

### Requirement 2

**User Story:** As a user, I want the application to have an intuitive and visually appealing interface, so that I can easily navigate and use the downloader.

#### Acceptance Criteria

1. WHEN the application loads THEN the system SHALL display a clean, responsive interface matching the Figma design
2. WHEN viewed on different screen sizes THEN the system SHALL maintain proper layout and usability
3. WHEN interactive elements are hovered or focused THEN the system SHALL provide appropriate visual feedback
4. WHEN the application is used THEN the system SHALL use exact color variables and spacing from the Figma design

### Requirement 3

**User Story:** As a user, I want to see download options and quality settings, so that I can choose the appropriate format for my needs.

#### Acceptance Criteria

1. WHEN a valid URL is entered THEN the system SHALL display available download formats and quality options
2. WHEN a user selects a format THEN the system SHALL update the download configuration accordingly
3. WHEN multiple quality options are available THEN the system SHALL present them in a clear, organized manner
4. IF no formats are available THEN the system SHALL display an informative message

### Requirement 4

**User Story:** As a user, I want real-time feedback during the download process, so that I know the status of my download.

#### Acceptance Criteria

1. WHEN a download starts THEN the system SHALL display a progress bar or loading indicator
2. WHEN download progress updates THEN the system SHALL reflect the current progress percentage
3. WHEN an error occurs during download THEN the system SHALL display a clear error message
4. WHEN the download completes successfully THEN the system SHALL show a success confirmation

### Requirement 5

**User Story:** As a developer, I want the application to use exact Figma design variables, so that the implementation matches the design specifications perfectly.

#### Acceptance Criteria

1. WHEN implementing colors THEN the system SHALL use exact color values from Figma variables
2. WHEN implementing spacing THEN the system SHALL use exact spacing values from Figma variables
3. WHEN implementing typography THEN the system SHALL use exact font specifications from Figma variables
4. WHEN implementing components THEN the system SHALL match exact dimensions and styling from Figma