Variants

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

Breakpoints

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

@xs:tdl:o	From 32rem up.
@sm:tdl:o	From 40rem up.
@md:tdl:o	From 48rem up.
@lg:tdl:o	From 64rem up.
@xl:tdl:o	From 80rem up.
@xxl:tdl:o	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:tdl:o	Container from 32rem up.
@c:sm:tdl:o	Container from 40rem up.
@c:md:tdl:o	Container from 48rem up.
@c:lg:tdl:o	Container from 64rem up.
@c:xl:tdl:o	Container from 80rem up.
@c:xxl:tdl:o	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:tdl:o	On a touch screen.
@prm:tdl:o	With reduced motion on.
@st:tdl:o	On the first frame.

States

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

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

Pseudo Elements

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

a::tdl:o	On ::after.
b::tdl:o	On ::before.
p::tdl:o	On ::placeholder.
s::tdl:o	On ::selection.