style sheet
From Longman Dictionary of Contemporary Englishstyle sheetˈstyle sheet noun [countable] a set of instructions that states what the typeface and colours of an electronic document should beExamples from the Corpusstyle sheet• Doubleclick or open the typeface, and you get a style sheet that you can print.• A collection of these tags makes up a style sheet and, together with the skeleton document, are saved as a template.• With an automatic system a few simple alterations to the style sheet and it's all done for you.• It is also well worth using this style sheet as the starting point for any new ones.