css-cheatsheet.md

Pseudo Classes - (:) specifies a special state of an element

:not, :active, :focus, :hover, :matches, :any-link
:(first, nth, last)-child, :nth-last-child
:(first, nth, last)-of-type, :nth-last-of-type

Pseudo Elements - (::) specifies a specific part of an element

::before, ::after, ::selection, ::first-letter, ::first-line

Animations

animation-(name, duration, timing-function, delay, iteration-count, direction, fill-mode, play-state)

declaration:

@keyframes <name> {
  from { ... }
  to { ... }
  50% { ... }
  25%, 75% { ... }
}

usage:

animation: <duration> <name>;