How to Update Site Content
Updating Car Data (JSON)
All vehicle data is stored in json/cars.json. Open this file in any text editor to add, remove, or modify vehicle listings.
Adding a New Vehicle
Copy an existing vehicle block in cars.json, change the id to a unique value (e.g. car-021), and fill in the brand, model, year, specs, options, etc.
Adding Images
Place copyright-free image files in the images/ folder. Reference them in the product HTML using: 
Adding Videos
Place video files (MP4 preferred) in the video/ folder. Add them to pages using the HTML5 video tag.
Updating CSS Themes
Edit css/theme1.css (gold), css/theme2.css (green), or css/theme3.css (red) to change colors. Only the :root CSS variables need to be changed for a full theme recolor.
Adding HTML Pages
Copy an existing page like catalogue.html as a template. Update the page title, meta description, breadcrumb, and main content. Link it in the navigation.