ENGINEERING PROOF
The implementation signals at a glance.
Selected finish, quantity, and demonstration cart state update from one predictable source.
Quantity boundaries prevent impossible values while confirmation feedback keeps outcomes clear.
Navigation and FAQ controls expose expanded state and remain usable from a keyboard.
The fictional product and principal artwork are built in CSS instead of borrowed from a commercial brand.
60-SECOND WALKTHROUGH
See the interface state change together.
- Select a finishChoose a product variation and see the selected state and product treatment update.
- Set a quantityUse validated controls that enforce the supported range from one to ten.
- Add to the demo cartUpdate the cart count and receive clear confirmation for the configured item.
- Check responsive behaviorUse mobile navigation and expandable FAQs without losing core functionality.
THE PROBLEM
A beautiful product page can still feel static.
Many landing-page exercises stop at visual styling. I wanted to build a product experience that responds to choices, keeps multiple interface elements synchronized, and gives the user clear feedback throughout the interaction.
THE SOLUTION
A configurable fictional storefront.
Luma One lets users choose a product finish, set a quantity from one to ten, add the configured item to a demonstration cart, navigate on mobile, and expand frequently asked questions.
- Product-finish selection with visible selected state.
- Validated quantity controls.
- Cart count and confirmation feedback.
- Mobile navigation and expandable FAQ behavior.
- Responsive layout across viewport sizes.
MY ROLE
Visual system, interaction model, and implementation.
I created the fictional product and visual direction, structured the interface, implemented the application behavior, and refined the responsive and accessible states. The product illustration is built in CSS rather than borrowed from a real brand.
ENGINEERING HIGHLIGHTS
Small interactions managed as one experience.
Central interface state
JavaScript tracks the selected finish, quantity, and demonstration cart state. Render functions update the related controls and feedback from that shared state so the interface does not drift out of sync.
Input boundaries and feedback
Quantity controls enforce the supported range and communicate the result of adding a configured item. This prevents impossible states while keeping the interaction direct.
Accessible responsiveness
Navigation and FAQ controls expose meaningful expanded states, remain usable by keyboard, and adapt to smaller screens without removing core functionality.
ARCHITECTURE
One state model keeps the storefront synchronized.
The state-and-render pattern keeps separate controls accurate after repeated interaction and makes behavior easier to reason about.
TECHNICAL DECISION
Invent the product—and keep the work original.
I chose a fictional product and created the principal artwork with CSS. That let the project focus on interface craft, layout, and behavior without depending on an existing commercial brand or product image.
The constraint became part of the technical exercise: shape, lighting, finish variations, and responsive presentation all had to be controlled in code.
IMPLEMENTATION CHALLENGE
Keep every visible state synchronized.
Finish controls, quantity, cart count, mobile navigation, and FAQ panels all change independently, but each must remain accurate after repeated interaction. A centralized state-and-render approach made those transitions more predictable and easier to reason about than scattered DOM updates.
RESULT
A frontend project with product behavior.
The result is a deployed interactive experience that demonstrates JavaScript state management, responsive composition, original CSS illustration, input constraints, accessible controls, and user feedback—not only a static landing page.
NEXT ITERATION
What I would build next.
- Split behavior into focused JavaScript modules.
- Add automated tests for configuration and cart logic.
- Persist the cart between sessions.
- Add a cart panel with editable line items and totals.