Robust web applications require back end service software to provide data processing power and separation from front-facing web servers. This gives added security and essential usability and performance benefits.
Responsive web pages use CSS and HTML components to deliver appropriately scaled and selected content to devices with varying screen sizes.
We have a long-established practice of developing generic software so many of our designs and components can readily be re-purposed. If you have a web project you're about to start, talk to us first to see if we have building blocks you can re-use.