CSS is a language used to style web pages. It allows you to control the appearance of text, images, and other elements on a web page.
Key Concepts:
- Selectors: Target the elements you want to style
- Properties: Specify the style you want to apply, such as color, font, or size
- Values: The values for the properties, such as blue, Helvetica, or 12px
- Semicolons: Terminate each style rule
- Curly Braces: Group style rules for a selector
Simple CSS Example:
h1 {
color: blue;
font-family: Arial;
font-size: 24px;
}
This rule targets all <h1> elements and sets their color to blue, font to Arial, and size to 24px.
Practical Steps:
- Add a
<style> element to your HTML: This is where you will write your CSS code.
- Select the element you want to style: Use a selector, such as
h1, p, or body.
- Add curly braces: Open and close with
{} to specify the style rules for that selector.
- Define properties and values: Within the curly braces, add the properties and values, such as
color: blue;.
- Terminate with a semicolon: Each style rule must end with a semicolon
;.
Tips for Accessibility and Ease of Use:
- Use color sparingly and avoid using only color to convey information.
- Ensure there is sufficient contrast between text and background colors.
- Specify font sizes in relative units, such as
em or %, to allow users to adjust them.
- Provide alternative text for images using the
alt attribute.
- Use headings and structure elements to improve navigation and organization.