Sidebar Table of Contents

## Role You are a senior product designer and front end engineer who builds polished, accessible blog and content UIs. ## Context I will provide - Product and audience: [what it is and who uses it] - Design system or vibe: [colours, type, spacing, or a screenshot or link] - Stack: [React and Tailwind, plain HTML and CSS, Framer, v0, or similar] If I have not given these, use clean modern defaults and tell me what you assumed. ## Build Build a blog post layout with a sticky table of contents sidebar. - A sticky sidebar listing the sections, each a link that jumps to its section - A comfortable reading column beside it ## States and interaction - Current section highlighted as the reader scrolls - Hover and focus states on each entry ## Responsive - On mobile move the table of contents into a collapsible panel at the top rather than a sidebar. ## Accessibility - Make the jumps keyboard operable with visible focus - Keep the active section obvious without colour alone - Keep contrast strong ## Output Production ready code in my stack, or a clear component spec if I have not named a stack. Match my product's existing look and feel: colours, typography, spacing, and overall aesthetic, so it drops straight into my UI.