Mobile-First Design with CSS

Mobile-First Design with CSS — a practical guide to CSS mobile-first design with clear examples you can reuse in real projects.

CSS Tutorial Series (83/109). Prefer one article? Read the complete CSS tutorial.

Short description

Mobile-first usually yields simpler CSS and better progressive enhancement.

Mobile-first

.cards { display: grid; gap: 1rem; }
@media (min-width: 900px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
}