Can I use
?

CSS 2.1 selectors

- REC

Basic CSS selectors including: * (universal selector), > (child selector), :first-child, :link, :visited, :active, :hover, :focus, :lang(), + (adjacent sibling selector), [attr], [attr="val"], [attr~="val"], [attr|="bar"], .foo (class selector), #foo (id selector)

Chrome

  1. 4 - 116: Supported
  2. 117: Supported
  3. 118 - 120: Supported

Edge

  1. 12 - 116: Supported
  2. 117: Supported

Safari

  1. 3.1 - 16.5: Supported
  2. 16.6: Supported
  3. 17.0 - TP: Supported

Firefox

  1. 2 - 116: Supported
  2. 117: Supported
  3. 118 - 120: Supported

Opera

  1. 9 - 101: Supported
  2. 102: Supported

IE

  1. 5.5: Not supported
  2. 6: Not supported (but has polyfill available)
  3. 7 - 10: Supported
  4. 11: Supported

Chrome for Android

  1. 117: Supported

Safari on iOS

  1. 3.2 - 16.6: Supported
  2. 17.0: Supported
  3. 17.1: Supported

Samsung Internet

  1. 4 - 21: Supported
  2. 22: Supported

Opera Mini

  1. all: Supported

Opera Mobile

  1. 10 - 12.1: Supported
  2. 73: Supported

UC Browser for Android

  1. 15.5: Supported

Android Browser

  1. 2.1 - 4.4.4: Supported
  2. 117: Supported

Firefox for Android

  1. 117: Supported

QQ Browser

  1. 13.1: Supported

Baidu Browser

  1. 13.18: Supported

KaiOS Browser

  1. 2.5: Supported
  2. 3: Supported

Support for :visited styling varies across browsers due to security concerns.

Resources:
Selectivizr: Polyfill for IE6-8
WebPlatform Docs
Detailed support information
Examples of advanced selectors