CSS for Blog: A Beginner’s Guide

As a blogger or a DIY blog designer, you’ve probably been told countless times that you need to know CSS. But what exactly is CSS? And how can you learn it without feeling overwhelmed?

Understanding CSS

CSS, short for Cascading Style Sheet, is a web document that allows you to change the appearance of your HTML. While HTML defines the structure and content of a web page, CSS enables you to modify the size, style, font, color, margins, padding, background color, and border style of text and elements on your page.

One significant advantage of CSS is its ability to create consistency throughout your blog or website. It allows you to make global style changes that will affect every instance of a particular element without having to make changes on individual pages. This feature saves you a lot of time when it comes to redesigning your blog.

For example, if you want to change the color, font, and size of all the H1 headings on your blog, you can simply define these styles in your CSS file. CSS also helps maintain consistency across different browsers and devices.

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How CSS Works

The Cascade

A crucial aspect of CSS is its “cascading” nature. When the browser reads a style sheet, it processes the style definitions from top to bottom. This means that styles defined lower in the style sheet will override any previous styles defined higher up. It’s also possible to have one style sheet override another, allowing you to customize predefined styles from blog themes or plugin widgets.

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Applying CSS

CSS is applied to HTML elements by declaring specific styles for each element using a style declaration:

selector {
  property: value;

Let’s break down the components of a style declaration:


The selector determines which elements you want to target and style. It can be an HTML element (specified without the opening and closing brackets) or a class name (starting with a dot).

For example, to target the paragraph tag, you would use p. To target a class called “big-font,” you would use .big-font.


Properties are predefined terms in CSS that browsers understand. They include font-family, font-size, color, and more. Properties always live within curly braces `{}.


The value is the specific style or variable you want to assign to a property. For instance, font-family: Arial; font-size: 16px; color: gray; tells the browser to display all page titles within <p> tags in Arial font, 16 pixels in size, and gray color.

Defining Multiple Elements

To avoid repetitive code, you can define multiple HTML elements with the same styles by separating them with commas. For example:

h1, h2, h3 {
  font-family: Verdana;
  font-size: 24px;
  color: green;

To override the font-size of h2 and h3 elements, you can then define them separately:

h2 {
  font-size: 20px;

h3 {
  font-size: 18px;

Styling Elements Other Than Text

CSS allows you to style more than just text. For example, you can define the appearance of widgets or images. To apply a black border around all your images, you can use the following code:

img {
  border-width: 1px;
  border-style: solid;
  border-color: #000000;

CSS Classes

If you want to target specific elements on your web page, you can add a class to them in the HTML code. To do this, include class="your-class-name" within the tag. In CSS, class names always start with a dot.

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For instance, if you want to remove the border from certain images on your page, you can add a class to those images:

<img src="image/twitter-icon.png" class="icons" />

Then, in your CSS, you can override the previous image style using:

.icons {
  border: none;

This style will only apply to image tags with the class name “icons.”

Nested CSS Styles

HTML tags can be nested within other HTML tags. To style nested tags, you specify the parent element followed by a space and then the child element. For example:

  <li>list item number one</li>
  <li>list item number two</li>
  <li>list item number three</li>

If you want all list items (<li>) within a specific unordered list (<ul>) to be italicized, you can define it in your CSS:

ul li {
  font-style: italic;

By adding a class to the <ul> tag, you can target specific unordered lists:

<ul class="slanted">
  <li>list item number one</li>
  <li>list item number two</li>
  <li>list item number three</li>

In your CSS, you would modify the style declaration accordingly:

.slanted li {
  font-style: italic;

Troubleshooting and Common Syntax Errors

When editing your style sheet, you may encounter errors or find that some styles aren’t working as expected. Here are some common troubleshooting tips for resolving syntax errors:

  • Check your style sheet for missing semi-colons, spelling errors, or incomplete curly braces.
  • Ensure that you’ve used the dot (.) before a class name and omitted it for HTML elements.
  • Verify that you’ve correctly used commas between multiple selectors.
  • Double-check your HTML to make sure you’ve followed the correct syntax for class names.

Expand Your CSS Knowledge

If you want to learn more about CSS specifically tailored for bloggers like you, explore additional CSS training materials that can enhance your skills.

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Got Questions About CSS?

Did this guide make sense? Was it easy to understand, or did it feel too complicated? Your feedback is valuable in helping me create the best learning experience for you! If you have any questions or need further assistance, don’t hesitate to reach out.

Now, go and explore how you can edit CSS in your blog and unlock its full potential!