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    Cascading Style Sheets (CSS)

    Web design & developmentCascading Style SheetsPrevious table term: css
    Editorially reviewed on: 2 sources
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    The short answer · 11 words

    In short

    CSS controls the appearance, spacing and layout of a web page.

    Flow-alerta.cab (2026): Cascading Style Sheets (CSS). https://flow-alerta.cab/en/glossar/cascading-style-sheets-css. Editorially reviewed on: 09 October 2026.

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    Practical

    Helps with designing, building and operating digital products and services that can be checked.

    Possible example: A design system defines font sizes and spacing for mobile devices and desktop computers.

    Possible application in small and medium-sized businesses: A design system defines font sizes and spacing for mobile devices and desktop computers.

    At a glance

    Core
    A styling language for the visual formatting of web pages, including layout, colours, typography and responsive design.
    Use
    Helps with designing, building and operating digital products and services that can be checked.
    Example
    Possible example: A design system defines font sizes and spacing for mobile devices and desktop computers.
    Limits
    Fixed dimensions or poor contrast make content difficult to use.

    In context

    HyperText Markup Language (HTML)

    HTML defines the meaning and structure of web content.

    JavaScript

    JavaScript is a programming language for interactive web content and other applications.

    Lazy Loading

    Lazy Loading loads suitable content only when needed.

    Questions about this term

    What does Cascading Style Sheets (CSS) mean?

    CSS controls the appearance, spacing and layout of a web page.

    What mistakes should be avoided?

    Fixed dimensions or poor contrast make content difficult to use.

    All details and background

    A styling language for the visual formatting of web pages, including layout, colours, typography and responsive design.

    ELI5 – Explained simply

    Like clothing and arrangement for the HTML framework.

    Why it matters in practice

    Helps with designing, building and operating digital products and services that can be checked.

    Example

    Possible example: A design system defines font sizes and spacing for mobile devices and desktop computers.

    Pitfalls and limits

    • Fixed dimensions or poor contrast make content difficult to use.

    Origin & history

    CSS Level 1 was published as a W3C Recommendation on 17 December 1996. The language is now developed in individual modules; CSS1 is a historical source here.

    Use in mid-sized companies

    • Possible application in small and medium-sized businesses: A design system defines font sizes and spacing for mobile devices and desktop computers.

    Related terms

    Matching Flow-alerta service

    Websites & web applicationsWebsites & web applications

    Matching tool / use case

    View use casesUse case: website prototype and technical assessment

    Sources

    Quellen geprüft am 09.10.2026. Redaktionelle Anwendungsbeispiele sind hypothetisch; kein Nachweis realer Kundenergebnisse.

    Editorially reviewed on:

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