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Next.js 15 Fullstack Web Apps · Lesson

Responsive Design and Dark Mode

Build layouts that adapt to any screen with mobile-first breakpoints and add a polished, user-aware dark mode using CSS variables and Tailwind.

Mobile-First Thinking

Responsive design means one layout that adapts to phones, tablets, and desktops. The modern approach is mobile-first: style the small screen first, then add enhancements for larger ones.

Media Queries

The CSS @media rule applies styles only above (or below) a width. Mobile-first uses min-width breakpoints.

.grid { display: block; }
@media (min-width: 768px) {
  .grid { display: grid; grid-template-columns: 1fr 1fr; }
}

All lessons in this course

  1. CSS Modules and Global Styles
  2. Integrating Tailwind CSS
  3. Component Libraries and Theming
  4. Responsive Design and Dark Mode
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