I run a custom-built blogging site and I want to introduce a polished modal that pops up, gathers user input, and submits those details to my existing back-end script. The site isn’t built on WordPress or Shopify, so the solution has to be framework-agnostic—plain JavaScript (or a lightweight library), HTML, and CSS that I can drop straight into my codebase. Here’s what I need from you: • A clean, responsive modal window triggered by a button or link. • A form inside the modal with client-side validation and clear error messaging. • Seamless submission to my current PHP endpoint (I’ll share the route), with success and failure feedback shown inside the modal—no page reloads. • Styling that matches my blog’s existing palette; I’ll provide the hex codes. • All scripts and styles neatly documented so I can tweak or extend them later. I’ll consider the job complete once I can paste your files into my project, click the trigger, submit the form, and see the data arrive in my database without breaking any other part of the site.