Variants

Prefix any class with a variant to apply it only under that condition. Variants stack, as in @md:h:tuo:4.

Breakpoints

Apply a class from a viewport width up. Each breakpoint covers its width & every width above it.

@xs:tuo:4	From 32rem up.
@sm:tuo:4	From 40rem up.
@md:tuo:4	From 48rem up.
@lg:tuo:4	From 64rem up.
@xl:tuo:4	From 80rem up.
@xxl:tuo:4	From 96rem up.

Containers

Apply a class from a container's width up, not the viewport's. Mark the parent with ct:is first.

@c:xs:tuo:4	Container from 32rem up.
@c:sm:tuo:4	Container from 40rem up.
@c:md:tuo:4	Container from 48rem up.
@c:lg:tuo:4	Container from 64rem up.
@c:xl:tuo:4	Container from 80rem up.
@c:xxl:tuo:4	Container from 96rem up.

Media

Apply a class when the device or the page matches a condition, or on the first frame an element renders.

@pc:tuo:4	On a touch screen.
@prm:tuo:4	With reduced motion on.
@st:tuo:4	On the first frame.

States

Apply a class only while the element is in a state, such as hovered, focused or checked.

h:tuo:4	On :hover.
f:tuo:4	On :focus.
fv:tuo:4	On :focus-visible.
a:tuo:4	On :active.
d:tuo:4	On :disabled.
fc:tuo:4	On :first-child.
c:tuo:4	On :checked.
e:tuo:4	On :empty.
fw:tuo:4	On :focus-within.
i:tuo:4	On :invalid.
in:tuo:4	On :indeterminate.
lc:tuo:4	On :last-child.
nc:tuo:4	On :nth-child.
r:tuo:4	On :required.
ro:tuo:4	On :read-only.
v:tuo:4	On :valid.

Pseudo Elements

Style a part of the element rather than the element itself, such as its placeholder or the selected text.

a::tuo:4	On ::after.
b::tuo:4	On ::before.
p::tuo:4	On ::placeholder.
s::tuo:4	On ::selection.

Negative

Put a minus after the colon to negate a value.

tuo:-4

A minus after the colon.