Cascading Style Sheets (CSS as the familiar acronym) is a Web technology that provides extra possibilities in the area of text and formatting in addition to HTML.
It can also be used to change the style of the letters, ie color, font, size, etc., independently, as well as to create template templates for internet pages. The most important feature of this technique is its flexibility.
There are several colors and several fonts compatible with each other on a Web page, and they can be used in common on all Web pages by defining them once with CSS, instead of re-specifying them on each page. This makes updating easier, as the size of the pages in memory is much smaller.
CSS codes can be written into HTML code or can be processed by creating an external CSS file. They can be placed in the <BODY> or <HEAD> sections according to the needs of a page. The CSS file can also be added to the worksheet with the code <link rel = “stylesheet” type = “text / css” href = “style.css” /> Storing them in separate files or files allows them to be used in different HTML pages, makes it easier to format the same page for different devices, and makes it more economical to separate the presentation.