Compound Interest Tool is a lightweight, production-ready HTML/CSS lead generation template built for marketers, founders, and small business owners. It delivers a polished floating card experience focused on turning visitors into subscribers.

Use case: Graphing calculator projecting wealth, gated results. Deploy it on landing pages, product sites, blog posts, or client projects without frameworks or build tools.

What’s included

• Responsive floating card layout (desktop and mobile)
• Email capture form ready to connect to your ESP or API
• Custom brand colors via CSS variables (–accent-color: #047857, –bg-color: #ECFDF5)
• High-resolution preview.png for Gumroad, Etsy, or your storefront
• README.md, listing.txt, LICENSE.txt, and CUSTOMIZATION.md

Quick start: open index.html, edit colors in the :root block, and point the form to Mailchimp, ConvertKit, Brevo, Formspree, or your own backend.