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tech 11 August 2026

Creating a Sunlight Effect with Pure CSS

Discover how a simple CSS implementation can transform your UI by mimicking sunlight streaming through a window.

Article inspired by the original source
a pure css implementation of some sunlight streaming in through the window ↗ github.com

Introduction

In the world of web development, innovation never ceases. Today, we're going to explore a fascinating and minimalist pure CSS implementation that recreates the effect of sunlight streaming through a window. Inspired by the GitHub project [sunlit](https://github.com/jackyzha0/sunlit) by jackyzha0, this concept shows how simple divs and a few lines of CSS can bring a user interface to life.

The Concept

The idea is quite simple: use basic HTML elements, mainly divs, and dress them up with CSS to simulate the visual effect of light filtered through blinds. The leaf images used to create shadow patterns are derived from Adobe Stock photos, reduced, and blurred to enhance the visual effect.

The Magic of CSS

The approach primarily uses CSS properties like background-image, box-shadow, and filter. Here's a sample code to understand how these elements interact:

```css #blinds { position: relative; width: 100%; height: 100%; background: url('leaves.png') no-repeat center center; background-size: cover; filter: blur(8px); }

.shutters { display: flex; position: absolute; top: 0; width: 100%; height: 100%; }

.shutter { flex: 1; background: rgba(255, 255, 255, 0.8); box-shadow: 0 0 10px rgba(0, 0, 0, 0.5); } ```

Practical Use Cases

This technique can be used in various contexts, including:

  • Portfolio Websites: Add an artistic and modern touch to your digital portfolio.
  • Landing Pages: Capture visitors' attention with captivating visual effects.
  • Interactive Applications: Create immersive interfaces for media-rich web applications.

Why Use Pure CSS?

Using pure CSS offers several advantages:

  1. Performance: CSS animations and effects are often more performant than equivalent JavaScript scripts.
  2. Compatibility: CSS is widely supported by all modern browsers.
  3. Simplicity: Fewer dependencies mean cleaner and more maintainable code.

Conclusion

The sunlight effect in CSS is an example of the power and flexibility of the language. It shows how a bit of creativity can transform a user interface into a captivating visual experience. Would you like to integrate this type of effect into your project?

Let's discuss your project in 15 minutes.

CSS web design UI effects pure CSS front-end development
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