click-area
The .click-area class makes a parent completely clickable based on the presence of a single, direct <a> child.
visually-hidden
The .visually-hidden class allows you to hide an element for the users eye, but still be readable for screen readers.
Transition
Classes that enable you to set CSS transitions on all transitional attributes of an element, as shown below.
css.transition-100/200/300/400/500 {
transition: all 100ms/200ms/300ms/400ms/500ms ease;
}Aspect ratio
.ratio-vid: sets the aspect ratio to 9/16..ratio-auto: sets the aspect ratio toauto..ratio-square: sets the aspect ratio to 1/1.
nth-child
Feo CSS enables you to use the --nth-child custom property to determine the nth-of-type value. This is a numeric value going between 1 to 10, and can be used for various things. You will thank me later when you need it.