Learn core CSS principles, explore layout creation, and refine skills in typography and styling.

Web Page Styling—CSS

In this module, we’ll introduce you to the essentials of CSS. We’ll learn about core concepts such as the cascade and inheritance. We’ll cover various CSS units and dive into fundamental principles like the box model, margins, padding, and fonts. We’ll also teach you about flexible layouts using display properties and CSS positioning techniques. Additionally, you’ll explore backgrounds, colors, images, and practical examples to solidify your understanding. By the end of this module, you will be able to confidently create well-structured web pages.

Getting Started with CSS

# HSL colors
**Hue Saturation Lightness (HSL) colors** are a more recent addition to CSS.

Similarly to RGB, we also list three values. The first is the hue (a value from `0` to `360`), then our saturation (a percentage from `0%` to `100%`), and then our lightness (a percentage from `0%` to `100%`). Examples are provided in the code snippet below:

```css
color: hsl(0, 0%, 0%);       /* black */
color: hsl(0, 0%, 100%);     /* white */
color: hsl(0, 100%, 50%);    /* red */
color: hsl(120, 100%, 25%);  /* green */
color: hsl(240, 100%, 50%);  /* blue */
color: hsl(60, 100%, 50%);   /* yellow */
```

HSL colors are opaque by default. To add opacity, use the `hsla()` functional notation to add a fourth value ranging from `0` (completely transparent) to `1` (completely opaque).

```css
color: hsla(180, 100%, 50%, .5);
```
# Example 

Getting Started with CSS

CSS Core Concepts

CSS Units

CSS Fundamentals

Unlocking Flexible Layouts with CSS Display

CSS Positioning

Typography in CSS

Backgrounds and Colors

Images and Floats in CSS

Conclusion

HSL colors