Difference between CSS and CSS3 - CSS vs CSS3

Year Released

1996

2005

Media Queries

Doesn’t support

Supports responsive web design

Browser Support

No support for modern browsers, but it still works
on older versions of Explorer or Chrome

Supported fully by all modern browsers

Compatibility Between Versions

Not compatible with CSS3

Backward compatible with CSS

Block Support

Supports single blocks only

Supports multi-column text blocks

Animation Use

It only allows basic animations and doesn't
support transformation, text animation, transition,
or 3D animations

It offers advanced animations and many customization options. It also supports text animation, transformation, and transition

Responsive Design

It doesn’t support media queries, thus not ideal
for making responsive designs

Works with media queries, thus allowing responsive web design

Module Use

It doesn’t have modules

Can group CSS codes into convenient modules

Color Format

It uses an old standard color format

It offers different gradient colors and schemes like RGBA, HSLA, HSL, etc.

Performance

It provides average performance and requires
high memory usage

It offers fast, excellent performance and doesn’t use as much memory