HTML5 / CSS3
Every fast site you've ever used got that way with clean HTML and CSS. There's no trick.
The foundation layer, done properly, before any framework enters the room.
Technology
HTML5 / CSS3
What we use it for
Everything. Sites we ship stand on markup we wrote, not a page builder's best guess.
Clean structure is why pages load fast, why screen readers cope, why search engines parse the content, and why a redesign three years from now doesn't mean starting over.
When it's the right call
It's never the wrong call. It's the floor everything else stands on, and the real question is how much needs to sit on top.
Some sites need nothing else, and those are often the fastest things on the internet. When someone quotes you a heavy framework for a simple site, ask what the framework is for. We ask ourselves the same question on every build.
Where this fits
HTML5 / CSS3 builds live inside our website design and development work. That page has the process, the proof, and the plain answers.