feat: update README.md

Author: Ramazanmak

README.md

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-# mlut website
+# How to Work with the mlut Website
+
+If you like our website and want to contribute — great news! You can submit your own art created with **mlut** and have it featured in our gallery.
+
+---
+
+## Installation
+
+1. Fork our repository from GitHub: [https://github.com/mlutcss/website](https://github.com/mlutcss/website)
+2. Clone your fork locally using `git clone` (or add it as a remote).
+3. Open a terminal (for example, Git Bash) and install all dependencies:
+
+   ```bash
+   npm ci
+   ```
+4. You’re all set — feel free to explore and start creating!
+
+---
+
+## Environment Overview
+
+Before making changes, please read through the conventions and tools we use in this project.
+
+### Eleventy (11ty)
+
+Our website is built with **Eleventy (11ty)** — a static site generator. We use **EJS** as our templating language, and we expect contributions to follow the same approach.
+
+Both tools have clear and beginner‑friendly documentation:
+
+* Eleventy: [https://www.11ty.dev/docs/](https://www.11ty.dev/docs/)
+* EJS: [https://ejs.co/#docs](https://ejs.co/#docs)
+
+If you’re not familiar with them yet — don’t worry, they’re easy to pick up.
+
+### mlut
+
+We use **mlut** to generate all CSS for the website. Every art piece shown in the gallery **must be styled using mlut utilities**.
+
+mlut allows you to write utilities in several places:
+
+* `class` attributes of HTML elements
+* JavaScript strings
+* String values of object properties
+
+The mlut configuration is located in `src/assets/style/style.scss`.
+
+
+Please **do not modify this file** unless absolutely necessary. It contains core variables and rules used across the entire website.
+
+**The only allowed exception** is adding a background color for your art in the gallery — this is explained in the Contribution section below.
+
+### Scripts
+
+The `package.json` file contains several useful scripts for development:
+
+* **`npm run build`** runs `npx @11ty/eleventy` and `npx mlut -i src/assets/style/style.scss`. Builds the `dist` folder and generates all CSS styles using mlut.
+
+* **`npm run mlut`** is equivalent to `npx mlut -i src/assets/style/style.scss -w`. Starts the mlut JIT engine and automatically generates styles based on templates.
+
+* **`npm start`** is alias for `npx @11ty/eleventy --serve`. Launches a local development server.
+
+---
+
+## Contribution Guide
+
+To add your own art made with mlut, follow these steps.
+
+### 1. Create the art layout
+
+Create a new `.ejs` file in the following folder `src/arts/`.
+
+This file should contain the layout of your art. You may use EJS features or plain HTML — both are perfectly fine.
+
+### 2. Name the file correctly
+
+* The filename **must be unique**.
+* It must match the art’s identifier.
+* Use **kebab-case** only.
+
+Valid examples:
+
+* `ghost`
+* `penrose-triangle`
+* `pretty-long-art-name`
+
+### 3. Register your art
+
+Open the file `src/_data/arts.json`.
+
+Add a new object describing your art. A typical entry looks like this:
+
+```json
+{
+  "caption": "Penrose triangle",
+  "artId": "penrose-triangle",
+  "bgColor": "Bgc-$art850"
+}
+```
+
+* `artId` — must match the filename of your `.ejs` file.
+* `caption` — optional and can be omitted.
+
+### 4. Add a background color
+
+Each art in the gallery has its own background color.
+
+Open the mlut config file `src/assets/style/style.scss`.
+
+Find the color palettes defined for:
+
+* Dark theme: `@media (prefers-color-scheme: dark)`
+* Light theme: `@media (prefers-color-scheme: light)`
+
+Inside the appropriate media query, add a custom CSS property following this pattern:
+
+```scss
+@media (prefers-color-scheme: dark) {
+  html {
+    /* core styles */
+    --ml-artYourArtName: /* your art background color */
+  }
+}
+```
+
+Please follow these rules:
+
+* Use **camelCase** for custom property names.
+* Replace `YourArtName` with your actual art name.
+
+### 5. Link the background color
+
+Return to your art object in `src/_data/arts.json` and set the `bgColor` value to:
+
+```
+"Bgc-$artYourArtName"
+```
+
+### 6. Submit your work
+
+* Double‑check that everything works correctly.
+* Commit your changes.
+* Push them to your forked repository.
+* Open a Pull Request to the original repository.
+
+---
+
+That’s it!
+
+We’re excited to see your creations and hope they’ll become part of our **pure CSS art gallery**