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The Cascading Style Sheets (CSS) specification describes how elements of web pages are displayed by graphical browsers. Section 4 of the CSS1 specification defines a "formatting model" that gives block-level elements—such as p and blockquote—a width and height, and three levels of boxes surrounding it: padding, borders, and margins. [4]
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An HTML element is a type of HTML (HyperText Markup Language) document component, one of several types of HTML nodes (there are also text nodes, comment nodes and others). [ vague ] The first used version of HTML was written by Tim Berners-Lee in 1993 and there have since been many versions of HTML.
To demonstrate specificity Inheritance Inheritance is a key feature in CSS; it relies on the ancestor-descendant relationship to operate. Inheritance is the mechanism by which properties are applied not only to a specified element but also to its descendants. Inheritance relies on the document tree, which is the hierarchy of XHTML elements in a page based on nesting. Descendant elements may ...
CSS flex-box layout is a particular way to specify the layout of HTML pages. One of the most defining features of the flex layout is its ability to form-fit, based on its viewing environment. Flex boxes can adjust in size—either decreasing, to avoid unnecessarily monopolizing space, or increasing to make room for contents to fit within its ...
In typography, a margin is the area between the main content of a page and the page edges. [1] The margin helps to define where a line of text begins and ends. When a page is justified the text is spread out to be flush with the left and right margins.
margin:0 0 0.5em 1em; This style prevents text from running straight to the template by saving blank space. It should be used on boxes which are floated right (using float: right; ). margin:0 1em 0.5em 0; This performs the same function as the style directly above, but should be used for boxes which are floated left (using float: left; ).
The first style sheet resets were released around 2004, [2] and many consisted of resetting the margins and padding of all elements: * { padding : 0 ; margin : 0 ; } However, the first reset style sheet, created in 2004 by Tantek Çelik , included additional features such as setting all font sizes to 1em and removing link underlines and borders.