The video tutorial introduces CSS variables, also known as custom properties, and demonstrates their use in HTML and CSS. It covers setting up a basic HTML structure with a header and container, adding CSS styling, and defining and using variables for colors and layout. The tutorial emphasizes the benefits of using variables for consistent styling and easy updates. It also explores advanced styling techniques using flexbox and variable scope management, concluding with best practices for using CSS variables effectively.

What is another name for CSS variables?

• HTML variables

• Style constants

• CSS placeholders

• Custom properties

Why is it beneficial to keep typing out repetitive CSS code?

• To become more familiar with CSS syntax

• To improve browser compatibility

• To reduce file size

• To increase typing speed

Where is it recommended to define CSS variables for easy updates?

• In the footer of the CSS

• In the HTML file

• In the root scope of the CSS

• In the JavaScript file

What CSS property is used to align text to the center?

• center-align: text

• align-text: center

• text-align: center

• text-center: align

What layout model is used for the container in the tutorial?

• Block

• Grid

• Flexbox

• Inline

How can you change the width of the layout using CSS variables?

• By changing the variable value in the root scope

• By editing the HTML structure

• By using JavaScript to manipulate the DOM

• By adjusting the browser window size

What is the advantage of using CSS variables for colors?

• They improve the loading speed of the website

• They automatically adjust to user preferences

• They allow for easy updates across multiple instances

• They reduce the number of CSS files needed

What happens if you move a variable definition into a specific scope like '.box'?

• The variable is deleted

• The variable can only be used within that scope

• The variable becomes read-only

• The variable becomes global

What is the effect of setting 'display: flex' on a container?

• It hides the container

• It changes the background color

• It makes the container scrollable

• It arranges child elements in a flexible layout

Why might you choose to keep certain variables in the root scope?

• To increase the specificity of the CSS

• To prevent them from being overwritten

• To ensure they are available throughout the stylesheet

• To make them inaccessible