Interface Guidelines

Concise rules for building accessible, fast, delightful UIs. Use MUST/SHOULD/NEVER to guide decisions.

Interactions

Keyboard

• MUST: Full keyboard support per WAI-ARIA APG
• MUST: Visible focus rings (:focus-visible)
• MUST: Manage focus (trap, move, return) per APG patterns
• NEVER: outline: none without visible focus replacement

Targets & Input

• MUST: Hit target ≥24px (mobile ≥44px)
• MUST: Mobile <input> font-size ≥16px to prevent iOS zoom
• NEVER: Disable browser zoom
• MUST: touch-action: manipulation to prevent double-tap zoom