CSS finally adds vertical centering in 2024
Supported since: Chrome: 123 | Firefox: 125 | Safari: 17.4
CSS3 (~2009-2012):
Level 3 CSS specs as defined by the CSSWG. (immutable)
CSS4 (~2013-2018):
Essential features that were not part of CSS3 but are already a fundamental part of CSS.
CSS5 (~2019-2024):
Newer features whose adoption is steadily growing.
CSS6 (~2025+):
Early-stage features that are planned for future CSS.
