Implemented interaction patterns
The marketing shell uses semantic landmarks and heading structure, a first-focus skip link, visible focus treatment, keyboard-operable navigation and disclosure controls, and descriptive image alternatives.
The mobile navigation manages focus, closes with Escape, restores focus to its trigger, locks background scrolling, and keeps touch controls at a usable size.
Reduced-motion styles remove nonessential movement. Responsive checks cover phone, tablet, desktop, forced-color, and 200% zoom conditions for representative routes.
Color is not intended to be the only carrier of state; labels, text, icons, structure, and focus treatment accompany important status and controls.