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margin-left

Area on which CSS margin-left applyThe margin-left CSS property sets the margin space required on the left side of a box associated with an element. A negative value is also allowed.
CSS CSS Property Layout Reference

writing-mode

The writing-mode property defines whether lines of text are laid out horizontally or vertically and the direction in which blocks progress.
CSS CSS Property Layout Reference

::after (:after)

The CSS ::after pseudo-element matches a virtual last child of the selected element. It is typically used to add cosmetic content to an element by using the content CSS property. This element is inline by default.
CSS CSS Pseudo-element Layout Reference Web

::selection

The ::selection CSS pseudo-element applies rules to the portion of a document that has been highlighted (e.g. selected with the mouse or another pointing device) by the user.
CSS CSS Pseudo-element Layout Reference Web

:active

The :active CSS pseudo-class matches when an element is being activated by the user. It allows the page to give a feedback that the activation has been detected by the browser. When interacting with a mouse, this is typically the time between the user presses the mouse button and releases it. The :active pseudo-class is also typically matched when using the keyboard tab key. It is frequently used on <a> and <button> HTML elements, but may not be limited to just those.
CSS CSS Pseudo-class Layout Reference Web

:checked

The :checked CSS pseudo-class selector represents any radio (<input type="radio">), checkbox (<input type="checkbox">) or option (<option> in a <select>) element that is checked or toggled to an on state. The user can change this state by clicking on the element, or selecting a different value, in which case the :checked pseudo-class no longer applies to this element, but will to the relevant one.
CSS CSS Pseudo-class Layout Reference Web

:disabled

The :disabled CSS pseudo-class represents any disabled element. An element is disabled if it can't be activated (e.g. selected, clicked on or accept text input) or accept focus. The element also has an enabled state, in which it can be activated or accept focus.
CSS CSS Pseudo-class Layout Reference Web

:empty

The :empty pseudo-class represents any element that has no children at all. Only element nodes and text (including whitespace) are considered. Comments or processing instructions do not affect whether an element is considered empty or not.
CSS CSS Pseudo-class Layout Reference Web

:enabled

The :enabled CSS pseudo-class represents any enabled element. An element is enabled if it can be activated (e.g. selected, clicked on or accept text input) or accept focus. The element also has an disabled state, in which it can't be activated or accept focus.
CSS CSS Pseudo-class Layout Reference Web

:first-child

The :first-child CSS pseudo-class represents any element that is the first child element of its parent.
CSS CSS Pseudo-class Layout Reference Web

:first-of-type

The :first-of-type CSS pseudo-class represents the first sibling of its type in the list of children of its parent element.
CSS CSS Pseudo-class Layout Reference Web

:focus

The :focus CSS pseudo-class is applied when an element has received focus, either from the user selecting it with the use of a keyboard or by activating with the mouse (e.g. a form input).
CSS CSS Pseudo-class Layout Reference Web

:lang

The :lang CSS pseudo-class matches elements based on the language the element is determined to be in. In HTML, the language is determined by a combination of the lang attribute, the <meta> element, and possibly by information from the protocol (such as HTTP headers). For other document types there may be other document methods for determining the language.
CSS CSS Pseudo-class Layout Reference Web

:last-of-type

The :last-of-type CSS pseudo-class represents the last sibling with the given element name in the list of children of its parent element.
CSS CSS Pseudo-class Layout Reference Web

:nth-child

The :nth-child(an+b) CSS pseudo-class matches an element that has an+b-1 siblings before it in the document tree, for a given positive or zero value for n, and has a parent element. More simply stated, the selector matches a number of child elements whose numeric position in the series of children matches the pattern an+b.
CSS CSS Pseudo-class Layout Reference Web

:nth-last-of-type

The :nth-last-of-type CSS pseudo-class matches an element that has an+b-1 siblings with the same element name after it in the document tree, for a given positive or zero value for n, and has a parent element. See :nth-child for a more thorough description of the syntax of its argument.
CSS CSS Pseudo-class Layout Reference Web

:nth-of-type

The :nth-of-type(an+b) CSS pseudo-class matches an element that has an+b-1 siblings with the same element name before it in the document tree, for a given positive or zero value for n, and has a parent element. See :nth-child for a more thorough description of the syntax of its argument. This is a more flexible and useful pseudo selector if you want to ensure you're selecting the same type of tag no matter where it is inside the parent element, or what other different tags appear before it.
CSS CSS Pseudo-class Layout Reference Web

:only-of-type

The :only-of-type CSS pseudo-class represents any element that has no siblings of the given type.
CSS CSS Pseudo-class Layout Reference Web