CSS Font Sizes

The font-size property in CSS allows you to control the size of text on your web page. Adjusting font size helps improve the readability and design of your website. Let's explore how you can use the font-size property to make your text fit your design needs.

1. The Font Size Property

The font-size property in CSS defines the size of text in an element. It can accept several values, from fixed sizes like pixels to relative units like percentages.

• font-size: Specifies the size of the font (e.g., 16px, 2em).

2. Examples

1. Using Pixel (px) for Fixed Sizes: Pixel values give you a specific size that doesn't change regardless of the screen size.

/* Font Size in Pixels */
p {
  font-size: 16px;
}

2. Using Em (em) for Relative Sizes: The em unit is relative to the font size of its parent element, making it useful for scalable designs.

/* Font Size in em */
h1 {
  font-size: 2em;
}

3. Using Rem (rem) for Root-Relative Sizes: The remunit is relative to the root (html) font size, providing consistent sizing across your entire page.

/* Font Size in rem */
p {
  font-size: 1.5rem;
}

4. Using Percentages (%): You can also use percentages for font sizes. This will scale the text relative to its parent's size.

/* Font Size in Percent */
div {
  font-size: 120%;
}

3. Responsive Font Sizes

To ensure your text is readable across different screen sizes, use relative units like em, rem, or %, which allow the text to scale according to the viewport size.

A common approach for responsive text is to use media queriesto change font sizes based on screen width:

/* Responsive Font Size Example */
h1 {
  font-size: 3vw;
}

4. Best Practices

- Always use relative units (like em, rem, or%) for better responsiveness.
- Test your text sizes across different devices to ensure readability.
- Avoid using too many different font sizes to maintain a clean, consistent design.