The @media rule is used to define different style rules for different media types/devices.
In CSS2 this was called media types, while in CSS3 it is called media queries.
Media queries look at the capability of the device, and can be used to check many things, such as:
width and height of the viewport
width and height of the device
orientation (is the tablet/phone in landscape or portrait mode?)
resolution
and much more
Syntax: < link rel="stylesheet" media="mediatype and | not | only (media feature)" href="mystylesheet.css" >
https://www.w3schools.com/cssref/css3_pr_mediaquery.asp
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The @media rule is used in media queries to apply different styles for different media types/devices.
Media queries can be used to check many things, such as:
width and height of the viewport
width and height of the device
orientation (is the tablet/phone in landscape or portrait mode?)
resolution
Using media queries are a popular technique for delivering a tailored style sheet (responsive web design) to desktops, laptops, tablets, and mobile phones.
You can also use media queries to specify that certain styles are only for printed documents or for screen readers (mediatype: print, screen, or speech).
In addition to media types, there are also media features. Media features provide more specific details to media queries, by allowing to test for a specific feature of the user agent or display device. For example, you can apply styles to only those screens that are greater, or smaller, than a certain width.
CSS Syntax
@media not|only mediatype and (mediafeature and|or|not mediafeature) {
CSS-Code;
}
https://www.w3schools.com/cssref/css3_pr_mediaquery.asp