I developed this site using HTML, CSS, JS and a bit of PHP

Modern technologies used

Houdini API - CSS Properties CSS color-mix() CSS light-dark() HTML5 Data Attributes svh and dvh units Dialog element CSS :has() CSS Nesting HTML Inert Attribute CSS @container

Credits

Particles.js Light/dark switch Font Awesome Google reCAPTCHA IP2Location API Lots of MDN and Stack Overflow