CSS or Cascading Style Sheets is a language that forms style for web pages. It is a style sheet language used to describe the interface and format of elements written in a markup language like HTML.
CSS and CSS3 were developed by W3C (World Wide Web Consortium) in 1996 to make an HTML page more aesthetic. It is a key element of web design with the power to separate the presentation and content including layout, colors, and fonts.
With CSS, you can adjust background colors & images, layout design, line spacing, font style, variations in display for different devices and screen sizes as well as effects.
CSS usually works with markup languages like HTML or XHTML. Without CSS, HTML is just a boring document container. However, CSS and HTML are kept entirely separate in two different files so that designers can make changes with the appearance without affecting any of its underlying structure.
CSS3 is the latest version of CSS that has been published since 2005. CSS3 has a bunch of new superiority features like rounded corners, shadows, gradients, transitions or animations, as well as new types of layouts like multi-columns, FLEX box or grid layouts. It contains everything from the previous version (CSS2.1) and also includes new features to help developers solve a number of problems without the need for non-semantic markup, complex scripting, or extra images. These new features are:
- The incorporation of Modules
- New Combinatory
- New CSS Selectors
- New Pseudo-elements
- New Style properties
So nowadays, when people talk about CSS, they actually mention CSS3 and not other older versions.
Three reasons why you should learn CSS
a. Easy to modify the look of your website
There are thousands of free available templates online but it may not fit your needs. By learning CSS and CSS3, you can modify pre-built templates without any effort. In addition, CSS also allows non-coding people like graphic designers to control the look, feel, and consistency of the website’s front-end without diving too much into the code world.
b. Save time
A lot of time is saved while using CSS. For example, your website has 40 pages and due to some reasons, you need to change all the text sizes from 14pt to 12pt. It may take you days to implement the whole thing by hand. However, with CSS, you can define all the changes in just a single CSS file and reference all those 40 pages to that same file to complete your work. Consequently, your entire website will reflect the size changes immediately.
c. CSS is a web standard
All browsers now support CSS so using CSS helps you build responsive, future-proof, and highly accessible websites.