More than 60% of global web traffic comes from mobile devices. Starting your design system from a desktop layout and shrinking it is no longer sufficient; mobile must be the primary canvas.

1. Touch-Target Sizing

Ensure interactive components like buttons, links, and form fields are easily tapable. A minimum target size of 44x44px avoids user frustration and is a core requirement for web accessibility compliance.

2. Responsive Performance

Mobile networks are often slower and less stable. Compressing image assets, implementing lazy loading, and loading CSS efficiently ensures your site displays instantly, even on 3G connections.