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All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • All points earned in the CSS Battle are automatically synced with the Opencode Leaderboard • 

Frontend Event

CSS Battle

A high-intensity sprint for pixel-perfect builders. Solve five handcrafted UI challenges, submit on time, and climb the leaderboard.

Register NowView Leaderboard
Watch Tutorial
Format

5 Challenges

Platform

CodeSandbox

Submit

Google Form

Registrations

...people registered

Pressing the button updates the live registration tally.

Event Flow

  • Pick any of the five challenges and build directly in CodeSandbox and share the link!
  • Submit your solution link and screenshot via the Google form.
  • Scores update live as accuracy and completion time are judged.

Scroll Preview

Step Into The Arena

Each challenge is a precise UI snapshot. Browse the gallery below to reveal the target layouts.

Simple Article Listing
Beginner

Simple Article Listing

Responsive layout practice using semantic HTML & Flexbox.

Start Challenge

What The Battle Rewards

Reward 01

Pixel Precision

Margins, spacing, typography, alignment, every pixel is judged when the score depends on pure visual accuracy.

  • 🎯Grid discipline for razor sharp spacing.
  • 🔍Micro-alignment that mirrors the target perfectly.

Reward 02

CSS Depth

Flexbox, Grid, stacking contexts, gradients, and layout edge cases, all tested under tight timing.

  • 🧩Layout traps that demand real-world CSS strategy.
  • ⚡Speed crafting without sacrificing structure.

Reward 03

Calm Under Pressure

Think clearly, code cleanly, and ship fast while the clock pushes you to stay sharp.

  • 🧠Decision control with calm, deliberate choices.
  • 🚀Confident shipping in a high-pressure sprint.
 Practice Challenges

Train your eye for spacing, alignment, and rhythm before the timer starts. These warm-ups are built to sharpen real contest instincts.

Classic Frontend Practice preview

Classic Frontend Practice

Practice problems that sharpen layout instincts and UI structure.

Warm-upFrontendSandbox
React Concepts Sprint preview

React Concepts Sprint

Work through core React ideas with focused, bite-sized tasks.

ReactHooksBasics
HTML + CSS Challenges preview

HTML + CSS Challenges

Rapid-fire layout drills for spacing, typography, and visuals.

HTMLCSSLayouts

Ready To Start

One day. One battle. Pure frontend skill.

Start the Challenge