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🧾 CSS Syntax Explained – The Building Blocks of Styling

At GoNimbus, we make CSS easy to understand—starting with its syntax. Think of CSS as a language that describes how HTML elements should look on a webpage.

Let’s break it down 👇

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✨ Basic Structure of a CSS Rule

Every CSS rule has two main parts:

selector {
  property: value;
}

✅ 1. Selector

The selector tells the browser which HTML element you want to style.

Examples:

h1         /* Targets all <h1> headings */
p          /* Targets all <p> paragraphs */
.button    /* Targets any element with class="button" */
#menu      /* Targets the element with id="menu" */

✅ 2. Declaration Block

The declaration block sits inside curly braces {} and contains one or more declarations, each ending with a semicolon ;.

Each declaration is made up of:

• Property (what you want to change)
• Value (how you want to change it)

Example:

color: blue;
font-size: 18px;

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🔍 Full Example

p {
  color: #333;
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

This rule:

• Targets all <p> tags
• Sets text color to dark gray
• Uses Arial font
• Increases line spacing for better readability

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💡 Tips from GoNimbus

• 🧱 Modular Design – Write reusable rules to avoid code duplication
• 🎯 Specificity Matters – Understand selector priority to resolve conflicts
• 🎨 Use Classes for Flexibility – Classes allow you to apply styles to multiple elements
• 🌐 Group Selectors – Apply the same styles to multiple selectors: h1, h2, h3 { font-family: 'Poppins', sans-serif; color: navy; }
• 🧪 Test & Tweak – Use browser developer tools to test CSS live

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🔄 Multiple Declarations in One Block

You can add as many declarations as needed, each on its own line or separated by semicolons:

div {
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 10px;
}

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💥 Common Mistakes to Avoid

• ❌ Missing semicolon ; at the end of a declaration
• ❌ Using = instead of : in properties
• ❌ Forgetting curly braces {} around the declaration block
• ❌ Not using quotes for font families with spaces

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📚 Practice CSS the GoNimbus Way

Our interactive editor lets you try CSS rules live and see the result instantly. Get immediate feedback, real examples, and personalized challenges to master CSS faster.

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🔗 Next Up:

Learn about CSS Selectors, Box Model, and Responsive Design in our hands-on modules.

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Let me know if you’d like to include a video demo, interactive code editor, or downloadable cheat sheet link as part of this section!

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