Create Central CSS Stylesheet (Extract Inline Styles)

[w2naf]

Description

The current HTML templates contain significant inline CSS styles. Extract these into a central CSS stylesheet for maintainability and consistency.

Acceptance Criteria

• Central stylesheet created (e.g., static/css/dashboard.css)
• Inline styles moved from HTML templates to the stylesheet
• Consistent class naming convention
• Dashboard appearance unchanged after extraction
• Templates reference the new stylesheet

Milestone

Milestone 1: Minimal Working System (Feb 28)