HTML (HyperText Markup Language) is the standard language used to create the content and structure of a web page—like the headings, paragraphs, and images. CSS (Cascading Style Sheets) is the language used to style that HTML, controlling the colors, fonts, layout, and overall visual appearance.

1. Semantic HTML uses tags that describe the meaning of the content. For example, using <nav> for a navigation menu instead of a generic <div>. This is vital for accessibility, as it helps screen readers understand the page structure, and for SEO, as it provides clear context to search engines.

1. Responsive design is the practice of using flexible layouts and CSS media queries to make a website automatically adapt its layout to fit the screen size of the device it's being viewed on. This ensures a great user experience whether someone is on a large desktop or a small smartphone.

1. Yes, this is one of our core services. We specialize in taking static design files from any major design tool (like Figma, Sketch, or Adobe Photoshop) and meticulously hand-coding them into a high-quality, fully functional, and interactive website.

1. Yes. We perform rigorous cross-browser testing as a standard part of our development process. We test our code on all modern web browsers, including Chrome, Firefox, Safari, and Edge, to ensure a consistent and reliable experience for all your visitors.

1. Our HTML/CSS service is focused on creating the front-end "presentation" layer of your website. We can deliver these static files to your team to integrate with your own back-end system, or we can work with our in-house back-end developers (who are experts in PHP, Python, .NET, etc.) to build a complete, full-stack application for you.