@acusti/styling
Exports Style, which is a React component that renders a CSS style string
as a <style> element in the <head> of the document optionally specified
by props.ownerDocument. Keeps a per-document global registry of styles
being rendered so that the same string of CSS will only be rendered as a
single <style> element, no matter how many times the <Style> element
with that string appears in the React component tree.
Also exports useful CSS string literals, such as SYSTEM_UI_FONT which can
be used as font-family: ${SYSTEM_UI_FONT}; to specify the appropriate UI
font for the current OS and browser.