The lack of good ways to vertically center elements in CSS has been a dark blemish on its reputation for pretty much its entire existence. What makes matters worse is the techniques that do work for vertical centering are obscure and unintuitive, while the obvious choices like vertical-align:middle never seem to work when you need them. The current landscape of vertical centering options ranges from negative margins to display:table-cell to ridiculous hacks involving full-height pseudo-elements.
The position property specifies the type of positioning method used for an element static, relative, fixed, absolute or sticky. The position property specifies the type of positioning method used for an element. Elements are then positioned using the top, bottom, left, and right properties.
A card is a flexible and extensible content container. It includes options for headers and footers, a wide variety of content, contextual background colors, and powerful display options. Similar functionality to those components is available as modifier classes for cards.
The margin property sets the margins for an element, and is a shorthand property for the following properties:. Top and bottom margins of elements are sometimes collapsed into a single margin that is equal to the largest of the two margins. This does not happen on horizontal left and right margins!
The CSS margin properties are used to create space around elements, outside of any defined borders. With CSS, you have full control over the margins. There are properties for setting the margin for each side of an element top, right, bottom, and left.
The CSS border properties allow you to specify the style, width, and color of an element's border. The border-style property specifies what kind of border to display. The border-style property can have from one to four values for the top border, right border, bottom border, and the left border. The border-width property specifies the width of the four borders.
The containing block of an element is defined as follows:. In paged media, an absolutely positioned element is positioned relative to its containing block ignoring any page breaks as if the document were continuous. The element may subsequently be broken over several pages.