What is CSS.

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CSS:-"CASCADING STYLE SHEET" allows us to apply formatting and styling to the HTML that builds our web page. CSS can control many elements of our web pages: colour, fonts, alignment, border, background, spacing, margins, and much more.

STYLE SHEETS:-

• Each elements on a page has a style defined for it.
• The style is defined by a set of attribute: value pairs.
• Style attributes can control:

1. font properties
2. Background properties 
3. Box related properties
4. list properties

WAYS TO DEFINE STYLES:-

1. INLINE STYLE SHEET:- Style is defined as an attribute of the element in place. Use this for "one-off" or special styles.
2. INTERNAL STYLE SHEET:-Styles defined in the head portion of web page. Use this if you don't have very many web pages, or for styles that are useful only for the given page.
3. EXTERNAL STYLE SHEET:- Styles defined in a separate file. Use this to centralize style definitions and provide uniformity across all pages of a website.