SCSS stands for Sassy Cascading Style Sheets.
It is a CSS preprocessor — an advanced version of CSS that allows you to write more powerful and efficient styles.

SCSS is part of Sass (Syntactically Awesome Style Sheets), which extends CSS with variables, nesting, mixins, functions, and more. It helps developers write cleaner, reusable, and organized code that later gets compiled into standard CSS that browsers can understand.

💡 What is a CSS Preprocessor?

A CSS preprocessor is a tool that lets you write styles using special syntax and features (like variables and loops) and then converts it into plain CSS.
SCSS is one of the most popular preprocessors used in modern web development.

⚙️ Basic Syntax Example

🔹 SCSS Code:

$primary-color: blue;

body {
  background-color: $primary-color;

  h1 {
    color: white;
    font-size: 30px;
  }
}

🔹 Compiled CSS Output:

body {
  background-color: blue;
}

body h1 {
  color: white;
  font-size: 30px;
}

✅ Explanation:

• $primary-color is a variable.
• Nesting allows styles to be written inside another selector (like HTML hierarchy).
• The SCSS code is compiled into normal CSS for browsers to read.

🌟 Key Features of SCSS

1. Variables – store reusable values (colors, fonts, sizes).
2. Nesting – write CSS rules inside one another, following HTML structure.
3. Mixins – reusable groups of CSS declarations.
4. Inheritance – share styles between selectors using @extend.
5. Partials and Imports – break large stylesheets into smaller files.
6. Operators – perform calculations (e.g., width: 100% / 3;).

🧠 Advantages of SCSS

• Saves time and reduces repetition.
• Makes stylesheets more organized and readable.
• Easier to maintain and scale for large projects.
• Fully compatible with CSS (every CSS file is valid SCSS).

⚔️ Difference Between CSS and SCSS

Feature	CSS	SCSS
Full Form	Cascading Style Sheets	Sassy Cascading Style Sheets
Syntax	Simple	Advanced and nested
Variables	Not supported	Supported using $
Nesting	Not allowed	Allowed
Reusability	Limited	High (mixins, inheritance)
Compilation	Directly used by browsers	Needs to be compiled into CSS

🧱 Example: Simple Mixin

@mixin button-style($color) {
  background-color: $color;
  border-radius: 5px;
  padding: 10px 20px;
}

button {
  @include button-style(red);
}