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Documentation officielleCSS
Langage de feuilles de style pour définir l'apparence et la mise en page des pages web
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CSS (Cascading Style Sheets) est un langage déclaratif qui décrit la présentation des documents HTML : couleurs, polices, marges, mise en page et animations. Il permet de séparer le contenu de sa mise en forme et d'adapter l'affichage à différents écrans. Développé notamment par Håkon Wium Lie et Bert Bos, il est aujourd'hui maintenu par le CSS Working Group du W3C.
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