css-responsive

Responsive design uses media queries to apply different styles based on the device’s screen size or other criteria.

@media type and (feature: value) {
  /* styles */
}

The type can be screen, print, speech, or all.

• screen is for screens, print is for printer previews
  The feature can be width, height, orientation, aspect-ratio, resolution, color, monochrome, grid, scan, update, or overflow-block.
• the max-width indicates the CSS will only be applied if the screen is less than or equal to the specified width.
  • max-width is often used when designing a desktop first website and adding mobile design via query
    The media type and feature are combined with and operator.

Media query can also be a separated file and linked to the HTML file using the link tag.

<link rel="stylesheet" media="screen and (max-width: 600px)" href="small.css">