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CSS Tutorial

Last Updated : 15 Oct, 2024
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Cascading Style Sheets (CSS) is a stylesheet language used to add styling on Markup languages such as HTML. CSS defines the presentation of HTML elements on a web page. It describes how HTML element will be visible in web page.

CSS Tutorial covers both basic and advanced concepts, including properties, selectors, functions, media queries, and more.

CSS-Tutorial

CSS Tutorial

What is CSS?

CSS stands for Cascading Style Sheets. It is a stylesheet language used to style and enhance websites presentation. It controls the layout of web page i.e. how HTML elements will be display on a webpage. With CSS, you can adjust font sizes, colors, backgrounds, …, etc and manage the layout. It transforms a basic webpage into a visually appealing and user-friendly experience.

Table of Content

How to Add CSS on HTML?

There are three different ways to add CSS styles to HTML document, these are –

  • Inline CSS: Use the style attribute on HTML element to add styles to the web page. It is used for small projects.
  • Internal CSS: Place the CSS styles within a <style> tag inside the HTML file, usually inside the <head> section.
  • External CSS: Create a separate CSS file with a .css extension and link this file to your HTML file using the <link> tag.

CSS Example

It is a basic example of CSS to explain different ways to add CSS styles in HTML document.

HTML 
<!-- File name: index.html -->
<!DOCTYPE html>
<html>

<head>

      <!-- Importing External CSS -->
    <link rel="stylesheet" href="style.css" /> 
    
      <!-- Using Internal CSS -->
    <style>
        h2 {
            color: green;
        }
    </style>
</head>

<body>
  
    <!-- Using Inline CSS -->
    <h2 style="text-align: center;">
          Welcome To GFG
     </h2>
  
    <p>CSS Tutorial - GeeksforGeeks</p>
</body>

</html>
CSS 
/* External CSS */
/* File name: style.css */
p {
      text-align: center;
}

Output

CSS Output

CSS Example Output

Also Check: Recent Articles on CSS

CSS Tutorial

Introduction to Modern CSS

This section covers the basic understanding of CSS, its advantages and disadvantages.

CSS Fundamentals

Understanding CSS basics is necessary whether you’re an experienced developer or just starting your web journey. Let’s explore some key CSS concepts.

CSS Styling Techniques

CSS describes how HTML elements should be presented on the web page. It provides colors, positions to the HTML elements, etc., create animations, and amplify your web page.

CSS Responsive Design and Media Queries

While developing a site, it has to be mobile-friendly and responsive. Here, we discuss all the concepts that help you make your website responsive.

Advanced CSS Topics

Let’s move further with the Advanced CSS. Learn advanced styling techniques and master your modern web design and development skills in 2024.

CSS Online Quizzes

To achieve a solid understanding of CSS, it’s essential to engage with CSS quizzes and MCQs. These CSS quizzes can enhance your ability to solve similar questions and improve your problem-solving skills.

Here are some quiz articles related to CSS 3:

CSS Practical Projects

The theoretical knowledge is not enought to understand CSS. So, it is required to work on some real life projects to learn CSS easily. Working on such HTML & CSS projects will test your CSS knowledge and you will get some hands-on experience.

Below are some HTML and CSS projects for better understanding.

CSS Interview Preparation

CSS Preprocessors

CSS Preprocessors introduce features like variables, nesting, and mixins to enhance the functionality, maintainability, and organization of stylesheets. Some popular preprocessors are:

CSS Frameworks

CSS frameworks are a collection of pre-written CSS files (and sometimes JavaScript components) that offer reusable code for common tasks such as buttons, grids, forms, and navigation menus.

These CSS frameworks provide a set of standardized, reusable components and a predefined structure, allowing developers to create responsive and aesthetically pleasing websites with reduced effort.

CSS Frameworks

Other Resources

CSS Versions

  • CSS1: The foundation, released in 1996, introduced basic styling capabilities for fonts, colors, and margins.
  • CSS2: Expanded in 1998, adding positioning elements, pseudo-classes, and improved layout options.
  • CSS 2.1: Further refinements in 2004, including improvements to inheritance and box model properties.
  • CSS3: Introduced from 2001 onwards, CSS3 isn’t a single version but a collection of modules adding features like animations, media queries, and web fonts. It’s constantly evolving.

Recent developments focus on variables (custom properties), enhanced grid and flexbox layouts, subgrid, aspect-ratio property, and color manipulation functions.

Why learn CSS?

1. Enhance Visual Appeal: CSS allows you to style your web pages, making them visually appealing and engaging. Here’s why it matters:

  • User Experience (UX): Well-designed websites attract and retain users. CSS enables you to create beautiful layouts, choose fonts, and apply colors that resonate with your audience.

2. Responsive Design: In today’s mobile-first world, responsive design is crucial. CSS empowers you to:

  • Media Queries: Adapt your layout based on screen size (desktop, tablet, mobile).
  • Flexbox and Grid: Create flexible, adaptive designs that look great on any device.

3. SEO Benefits: CSS indirectly impacts your site’s SEO. Here’s how:

  • Page Load Speed: Well-organized CSS files load faster, improving user experience. Google considers page speed as a ranking factor.
  • Structured Content: Properly styled HTML (thanks to CSS) enhances readability for search engines and users.
  • Mobile Friendliness: Responsive CSS ensures your site performs well on mobile devices, positively affecting rankings.

4. Efficient Maintenance: CSS promotes clean code and separation of concerns:

  • Modularity: Separate CSS files allow easy updates without affecting other parts of your site.
  • Consistency: Apply styles consistently across your site using classes and IDs.

5. Career Opportunities: Learning CSS opens doors to various roles:

  • Front-End Developer: Mastering CSS is essential for front-end development.
  • Web Designer: CSS skills are fundamental for creating stunning web layouts.
  • Full-Stack Developer: Understanding CSS complements back-end skills.

Advanced CSS Features

As you conquer the basics, explore these powerful features to elevate your web design:

  • Media Queries: Tailor website layouts for different screen sizes, ensuring optimal viewing experiences across devices.
  • CSS Grid and Flexbox: Revolutionize website layouts with these frameworks for creating complex and responsive designs.
  • CSS Animations and Transitions: Add interactivity and visual flair to your webpages with smooth animations and transitions.

CSS – Frequently Asked Questions

What is the Full Form of CSS?

CSS stands for Cascading Style Sheets. It is a style sheet language used to describe the presentation and formatting of a document written in HTML or XML.

What are the types of CSS?

There are three types of CSS which are given below:

  • Inline CSS: Inline CSS contains the CSS property in the body section attached to the element.
  • Internal or Embedded CSS: The CSS ruleset should be within the HTML file in the head section i.e. the CSS is embedded within the HTML file.
  • External CSS: External CSS contains a separate CSS file that contains only style properties with the help of tag attributes.

Use the <link> element within the <head> section of your HTML document. Example: <link rel=”stylesheet” type=”text/css” href=”styles.css”>

What is the purpose of the ‘box model’ in CSS?

The box model is a fundamental concept in CSS that describes the layout of elements. It consists of content, padding, border, and margin, which collectively determine the size and spacing of an element.

How can I center an element horizontally and vertically in CSS?

To center horizontally, use margin: auto; on the element. For vertical centering, consider using Flexbox (display: flex; align-items: center; justify-content: center;) or Grid (display: grid; place-items: center;).

What is the difference between ‘margin’ and ‘padding’ in CSS?

Margin is the space outside an element, creating space between the element and its surrounding elements. Padding is the space inside an element, creating space between the element’s content and its border.

How do media queries contribute to responsive design in CSS?

Media queries allow developers to apply styles based on characteristics such as screen width, height, or device orientation. They are crucial for creating responsive designs that adapt to different devices and screen sizes.



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