Configure The Bike

Category: Product UI

Date: 2026

Technology: HTML5, CSS3 (No JS)

Project Overview

A sophisticated pure CSS bike configuration interface. This project showcases advanced selector usage, transitions, and CSS-only state management using checkboxes and radio buttons. Users can customize wheel styles and interact with the bike model without a single line of JavaScript.

Key Features:

Interactive Product Customization
Pure CSS State Management
Smooth CSS Transitions & Animations
Advanced Flexbox/Grid Layout
Responsive Design
Zero JavaScript Dependency

View Live Demo →

📄 index.html - Core Structure

How HTML Works:

The interface uses invisible inputs (checkboxes and radio buttons) at the top of the wrapper. These act as state controllers. Using the sibling selector (~), we can trigger styling changes throughout the DOM based on which input is checked.

<div id="wrap">
  <input class="initial" type="checkbox"></input>
  <input class="wheel1" name="wheel" type="radio"></input>
  <input class="wheel2" name="wheel" type="radio"></input>
  <!-- ... more wheel toggles ... -->
  <input class="buy" type="checkbox"></input>
  <h1>Configure the Bike</h1>
  <!-- ... bike SVG/Div parts ... -->
</div>

🎨 style.css - Logic & Design

How CSS Works:

CSS does the heavy lifting here. When a specific radio button is checked, it changes the background image or color of the bike components. CSS variables are often used for high-performance updates. The :checked pseudo-class is the "engine" behind the interactivity.

/* State management examples */
.wheel1:checked ~ .frame .wheel {
  background-image: url('wheel1.png');
}

.buy:checked ~ h2 {
  opacity: 1;
  transform: translateY(0);
}

.initial:checked ~ .toggle.expand {
  transform: scale(0);
}

How It Works

1. Input Hack: By placing inputs at the top level and labels elsewhere, we create interactive zones that toggle CSS states.

2. Progressive Enhancement: The layout uses modern CSS techniques that degrade gracefully on older browsers while providing a premium experience on modern ones.

3. Performance: Since it's pure CSS, the UI is extremely performant, with animations handled directly by the browser's GPU.

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