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Home/Tutorials/The Complete HTML & CSS Tutorial

The Complete HTML & CSS Tutorial

Learn HTML and CSS in this free 2026 tutorial — semantic markup, forms, accessibility, the box model, flexbox, grid, responsive design and animations, with copy-paste examples.

14 modules70 lessons100% Free

Start Learning Interview Questions

The Complete HTML & CSS Tutorial

70 articles · 14 chapters

What Happens Between Your Browser and a Web Server?
What Are the Parts of a Complete HTML Page?
How Do You Write and Open Your First Web Page?
How Do Browser DevTools Expose Any Page's HTML and CSS?
How Do You Attach CSS to a Page Three Different Ways?

How Do Headings and Paragraphs Structure Written Content?
How Do Links Connect Pages, Anchors and Email?
How Do You Add Images, Figures and Captions Correctly?
What Are the Three List Types and When Is Each Right?
How Do You Build an Accessible HTML Table?

How Do Forms Collect Data With Modern Input Types?
Why Do Labels Matter for Every Form Field?
How Do Selects, Checkboxes and Radios Differ?
What Happens When a Form Is Submitted?
How Does Built-In HTML Form Validation Work?

What Are header, nav, main, article and footer Really For?
How Do alt Text and ARIA Help Screen Readers?
How Does Keyboard Focus Order Shape Usability?
What Goes in head and Why Search Engines Care?
How Do You Catch Structure Errors With an HTML Validator?

Which CSS Selectors Cover Everyday Needs?
How Do the Cascade and Specificity Decide Who Wins?
What Does Inheritance Pass Down and What Does It Not?
Which Units Belong Where: px, rem, em and %?
How Do Colors, Opacity and Contrast Work in CSS?

What Are the Four Layers of the Box Model?
Why Does Almost Every Project Set border-box?
Why Do Vertical Margins Collapse Together?
How Do Borders, Shadows and Radius Polish a Box?
How Does overflow Control Text and Images That Don't Fit?

What Does display:flex Change on a Container?
How Do direction and wrap Reshape a Row?
How Do justify-content and align-items Center Anything?
What Do flex-grow, flex-shrink and flex-basis Do?
How Do You Build a Responsive Navbar With Flexbox?

How Do fr Units and grid-template-columns Divide Space?
How Do Rows, Gaps and Implicit Tracks Complete a Grid?
How Do Items Span Cells and Grid Areas?
How Do You Lay Out a Full Page Shell With Grid?
How Does One Grid Handle Cards on Every Screen Size?

How Do Media Queries Change Styles at Breakpoints?
Why Build Mobile-First and Scale Up?
What Does the viewport meta Tag Actually Control?
How Do You Choose Breakpoints Without Guessing?
How Do srcset, sizes and object-fit Handle Media?

How Do System Stacks and Web Fonts Load Fast?
What Line Height and Scale Make Text Comfortable?
How Does Contrast Guide Both Design and Accessibility?
How Do Linear and Radial Gradients Work?
Why Do CSS Custom Variables Beat Scattered Values?

How Do transitions Smooth State Changes?
What Can translate, scale and rotate Do to a Box?
How Do keyframes Animate Multi-Step Motion?
How Do Hover and Focus States Feel Deliberate?
Which Properties Animate Cheaply and Why?

What Do hover, focus and nth-child Really Select?
What Can before and after Decorate Without Extra HTML?
How Do Attribute Selectors and Combinators Target Precisely?
What Does :has() Unlock for Parent Styling?
How Does Native CSS Nesting Cut Selector Repetition?

How Do relative and absolute Positioning Cooperate?
When Do sticky and fixed Beat the Alternatives?
Why Does z-index Misbehave and How Do Stacking Contexts Rule It?
What Are the Reliable Ways to Center in CSS Today?
How Do You Build Card Rows and Hero Sections That Reuse Well?

How Do Tokens and Class Naming Keep CSS Maintainable?
How Should Stylesheets Split as a Project Grows?
What Slows Page Rendering and How Do You Fix It?
How Is a Real Landing Page Assembled Step by Step?
What Goes Into a Complete Responsive Portfolio Page?

Interview Questions

1

How the Web Works

Module 1 of 14 · 5 lessons

1.1
What Happens Between Your Browser and a Web Server?
6 min htmlFree
1.2
What Are the Parts of a Complete HTML Page?
6 min htmlFree
1.3
How Do You Write and Open Your First Web Page?
6 min htmlFree
1.4
How Do Browser DevTools Expose Any Page's HTML and CSS?
6 min htmlFree
1.5
How Do You Attach CSS to a Page Three Different Ways?
6 min cssFree

2

HTML Elements and Tags

Module 2 of 14 · 5 lessons

2.1
How Do Headings and Paragraphs Structure Written Content?
5 min htmlFree
2.2
How Do Links Connect Pages, Anchors and Email?
6 min htmlFree
2.3
How Do You Add Images, Figures and Captions Correctly?
6 min htmlFree
2.4
What Are the Three List Types and When Is Each Right?
6 min htmlFree
2.5
How Do You Build an Accessible HTML Table?
5 min htmlFree

3

HTML Forms

Module 3 of 14 · 5 lessons

3.1
How Do Forms Collect Data With Modern Input Types?
5 min htmlFree
3.2
Why Do Labels Matter for Every Form Field?
6 min htmlFree
3.3
How Do Selects, Checkboxes and Radios Differ?
6 min htmlFree
3.4
What Happens When a Form Is Submitted?
6 min htmlFree
3.5
How Does Built-In HTML Form Validation Work?
6 min htmlFree

4

Semantic HTML and Accessibility

Module 4 of 14 · 5 lessons

4.1
What Are header, nav, main, article and footer Really For?
5 min htmlFree
4.2
How Do alt Text and ARIA Help Screen Readers?
6 min htmlFree
4.3
How Does Keyboard Focus Order Shape Usability?
6 min htmlFree
4.4
What Goes in head and Why Search Engines Care?
6 min htmlFree
4.5
How Do You Catch Structure Errors With an HTML Validator?
6 min htmlFree

5

CSS Basics and Selectors

Module 5 of 14 · 5 lessons

5.1
Which CSS Selectors Cover Everyday Needs?
6 min cssFree
5.2
How Do the Cascade and Specificity Decide Who Wins?
6 min cssFree
5.3
What Does Inheritance Pass Down and What Does It Not?
6 min cssFree
5.4
Which Units Belong Where: px, rem, em and %?
6 min cssFree
5.5
How Do Colors, Opacity and Contrast Work in CSS?
7 min cssFree

6

CSS Box Model

Module 6 of 14 · 5 lessons

6.1
What Are the Four Layers of the Box Model?
6 min cssFree
6.2
Why Does Almost Every Project Set border-box?
6 min cssFree
6.3
Why Do Vertical Margins Collapse Together?
6 min cssFree
6.4
How Do Borders, Shadows and Radius Polish a Box?
6 min cssFree
6.5
How Does overflow Control Text and Images That Don't Fit?
6 min cssFree

7

CSS Flexbox Layout

Module 7 of 14 · 5 lessons

7.1
What Does display:flex Change on a Container?
7 min cssFree
7.2
How Do direction and wrap Reshape a Row?
6 min cssFree
7.3
How Do justify-content and align-items Center Anything?
7 min cssFree
7.4
What Do flex-grow, flex-shrink and flex-basis Do?
6 min cssFree
7.5
How Do You Build a Responsive Navbar With Flexbox?
6 min cssFree

8

CSS Grid Layout

Module 8 of 14 · 5 lessons

8.1
How Do fr Units and grid-template-columns Divide Space?
6 min cssFree
8.2
How Do Rows, Gaps and Implicit Tracks Complete a Grid?
6 min cssFree
8.3
How Do Items Span Cells and Grid Areas?
6 min cssFree
8.4
How Do You Lay Out a Full Page Shell With Grid?
6 min cssFree
8.5
How Does One Grid Handle Cards on Every Screen Size?
6 min cssFree

9

Responsive Web Design

Module 9 of 14 · 5 lessons

9.1
How Do Media Queries Change Styles at Breakpoints?
6 min cssFree
9.2
Why Build Mobile-First and Scale Up?
6 min cssFree
9.3
What Does the viewport meta Tag Actually Control?
6 min htmlFree
9.4
How Do You Choose Breakpoints Without Guessing?
6 min cssFree
9.5
How Do srcset, sizes and object-fit Handle Media?
6 min htmlFree

10

CSS Typography and Colors

Module 10 of 14 · 5 lessons

10.1
How Do System Stacks and Web Fonts Load Fast?
7 min htmlFree
10.2
What Line Height and Scale Make Text Comfortable?
6 min htmlFree
10.3
How Does Contrast Guide Both Design and Accessibility?
7 min htmlFree
10.4
How Do Linear and Radial Gradients Work?
7 min htmlFree
10.5
Why Do CSS Custom Variables Beat Scattered Values?
6 min htmlFree

11

CSS Animations and Transitions

Module 11 of 14 · 5 lessons

11.1
How Do transitions Smooth State Changes?
5 min htmlFree
11.2
What Can translate, scale and rotate Do to a Box?
7 min htmlFree
11.3
How Do keyframes Animate Multi-Step Motion?
6 min htmlFree
11.4
How Do Hover and Focus States Feel Deliberate?
7 min htmlFree
11.5
Which Properties Animate Cheaply and Why?
6 min htmlFree

12

Modern CSS Features

Module 12 of 14 · 5 lessons

12.1
What Do hover, focus and nth-child Really Select?
8 min cssFree
12.2
What Can before and after Decorate Without Extra HTML?
7 min cssFree
12.3
How Do Attribute Selectors and Combinators Target Precisely?
8 min cssFree
12.4
What Does :has() Unlock for Parent Styling?
7 min cssFree
12.5
How Does Native CSS Nesting Cut Selector Repetition?
7 min cssFree

13

CSS Positioning and Z-Index

Module 13 of 14 · 5 lessons

13.1
How Do relative and absolute Positioning Cooperate?
7 min htmlFree
13.2
When Do sticky and fixed Beat the Alternatives?
6 min htmlFree
13.3
Why Does z-index Misbehave and How Do Stacking Contexts Rule It?
5 min htmlFree
13.4
What Are the Reliable Ways to Center in CSS Today?
6 min htmlFree
13.5
How Do You Build Card Rows and Hero Sections That Reuse Well?
6 min htmlFree

14

HTML and CSS Projects

Module 14 of 14 · 5 lessons

14.1
How Do Tokens and Class Naming Keep CSS Maintainable?
6 min htmlFree
14.2
How Should Stylesheets Split as a Project Grows?
5 min htmlFree
14.3
What Slows Page Rendering and How Do You Fix It?
7 min htmlFree
14.4
How Is a Real Landing Page Assembled Step by Step?
7 min htmlFree
14.5
What Goes Into a Complete Responsive Portfolio Page?
7 min htmlFree

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HTML and CSS Tutorial — Learn HTML and CSS Step by Step (2026, Free) - Tutorsbot