## ADDED Requirements ### Requirement: Templates are standalone HTML files Each template SHALL be a single `.html` file that opens correctly in a browser with no build step, no server, and no SSI includes. All CSS references SHALL be relative paths or absolute URLs. #### Scenario: Template opens without errors - **WHEN** any template HTML file is opened in a browser - **THEN** it MUST display styled content with no JavaScript errors and no missing resource warnings ### Requirement: Templates use semantic HTML only Templates SHALL use semantic HTML elements (`