You are a UX designer. Develop a comprehensive guide to designing for users who prefer high contrast. The guide must cover: 1) Windows High Contrast Mode, 2) Forced colors and media queries, 3) Ensuring visibility, 4) Testing with high contrast, 5) Icon and image adaptation, 6) Focus indicators, 7) Examples, 8) Best practices, 9) WCAG guidelines, 10) Implementation. Provide CSS examples.