Users rarely praise a fast site, but they leave slow ones. Performance is part of the experience, from the first byte to the last interaction. Start with a budget: how many kilobytes and how many seconds are acceptable? Measure on real devices and treat regressions like bugs. Fast products feel...

Accessible design is good design. Clear contrast, sensible headings and keyboard-friendly controls help everyone, not only people with disabilities. Test with a screen reader, navigate with the keyboard and check colour contrast early. Fixing issues in the design stage costs almost nothing. Aim...

Designing for small screens forces useful constraints: clear priorities, simple navigation and fast loading. Then enhance for larger displays with more space, richer layouts and better use of the pointer. The best experiences feel right on every...