IntermediateUI SectionSenior ReviewPRO
SaaS Pricing Tier System
High-converting pricing grid with monthly/annual billing cycle toggle, calculated savings pills, and feature matrices.
Any StackHTML, CSS, JS, React, Next.js, Tailwind or any framework
•HTML5CSS GridJavaScriptResponsive UI
✓
Free Community Access
Sign In to Unlock Live Sandbox & Full Requirements
Explore the live interactive reference sandbox with responsive viewport switcher, inspect the full functional requirements & zero-CLS guidelines, check off implementation steps, and submit your solution for senior engineer review.
Live Sandboxed Reference Preview
Test Desktop, Tablet, and Mobile viewports with live DOM inspection and full-screen preview.
Full Functional Specifications
Comprehensive design specifications, zero-CLS aspect ratio requirements, and design tokens.
WAI-ARIA Accessibility Matrix
Keyboard navigation patterns, focus management rules, and screen reader announcements.
Progress Tracking & Code Reviews
Track started challenges in your personal dashboard and receive senior code reviews.
✓ 100% Free to Build•✓ Instant GitHub or Google Sign In•✓ No Credit Card Required