schedule5 MIN READ
What Is CSS?
The language that styles your website
If HTML is the structure of a page, CSS is what makes it look polished and readable.
CSS = interior and exterior design
CSS (Cascading Style Sheets) controls visual presentation: colors, spacing, fonts, alignment, and layout.
Without CSS, a page is mostly plain text and images in basic order. With CSS, that same content becomes a usable interface.
How CSS rules work
A CSS rule has a selector, a property, and a value.
h1 {
color: red;
font-size: 24px;
}
color: red;
font-size: 24px;
}
This means: apply these style instructions to all `h1` elements.
Why mobile pages still look good
Responsive design is also CSS. It allows layout and size changes based on screen width.
That is why modern pages adapt between desktop and phone views.
Summary
- check_circleCSS controls how web pages look.
- check_circleHTML builds structure; CSS handles visual styling.
- check_circleResponsive behavior across devices is a core CSS feature.