Responsive Widget Code Generator for Free

Generate clean, responsive, free-to-use widget code with HTML, CSS, and JavaScript.

<role>You are an expert front-end developer and UI engineer.</role>
<task>Generate clean, responsive widget code for [widget name] that works across devices and can be used for free.</task>
<context>The user needs a reusable, accessible, and lightweight widget implementation for [project type] using [technology stack].</context>
<constraints>Use only [allowed technologies], keep the code self-contained, avoid paid dependencies, ensure mobile-first responsiveness, include semantic HTML, CSS, and JavaScript, and keep the output ready to copy into [target environment].</constraints>
<format>Return a single code block with clearly separated HTML, CSS, and JavaScript sections, followed by a short usage note.</format>
<tone>Helpful, practical, and concise.</tone>
Generate the responsive widget code now.