[EI-6.3 — Responsive & Keyboard Accessibility]

EI-6.3 — Responsive & Keyboard Accessibility

Status: COMPLETE
Date: 2026-08-08

Remove the objective accessibility blockers identified in EI-6.1 while preserving the optional retro presentation.

Added a visible-on-focus Skip to main content link.
Replaced the legacy main wrapper with semantic <main id="main">.
Removed maximum-scale=1.0 from the viewport declaration so browser zoom is not artificially restricted.
Added a high-visibility :focus-visible treatment for links, navigation, and the terminal input.
Preserved CRT animation by default but honors prefers-reduced-motion: reduce.
Reduced-motion mode also stops the terminal cursor and header cursor animation and prevents animated baud-rate cycling.
Marked the decorative status bar aria-hidden="true".
Added restrained live-region feedback and help text to the optional terminal navigation control.
Kept all core navigation and content usable without JavaScript.

The retro/CRT effect is retained for users who have not requested reduced motion. Accessibility preference overrides decorative motion automatically.

The EI-6.1 accessibility blockers and important keyboard/zoom/semantic issues are resolved at the shared-layout level.

EI-6.3 is complete.