Is CSS case sensitive?

[Sankara Vignesh]

CSS in the website designing which has the case sensitive format or not, please discuss about it !

[24x7servermanag]

CSS is not case sensitive but other part that is font families, URLs and some other part in the CSS is case sensitive. Classes, attributes are case sensitive in CSS.

[myhealth]

The case sensitivity of document language element names, attribute names, and attribute values in selectors depends on the document language. ... In quirks mode CSS class and id names are case insensitive. In standards mode they are case sensitive

[stellasweety]

CSS is not case sensitive but rather other part that is textual style families, URLs and some other part in the CSS is case delicate. Classes, qualities are case delicate in CSS.

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[ajay49560]

Hii
Last time I have been attending my css session. I had read that the css class are case sensitive and I also know that the CSS is different from Css . But suddenly my mind click & i had a trick and I tried to change the case structure on many classes. This experience is very interesting for me. But I have some doubt on my triks and work.
So, any of u guys have any knowledge about css and html. So plz help me if u can.

[SAP Online]

CSS is not case study. It is very easy to use. There are a lots of video based tutorials available on the planet about CSS

[Micha]

The case sensitivity of document language element names, attribute names, and attribute values in selectors depends on the document language. ... In quirks mode CSS class and id names are case insensitive

[Nirala]

No, CSS is not case sensitive

[dennis123]

CSS selectors are generally case-insensitive; this includes class and ID selectors. But HTML class names are case-sensitive (see the attribute definition), and that's causing a mismatch in your second example. ... If the document type defined class names as case-insensitive, then you would have a match regardless.