Current build wraps the app in a fixed max-w-[412px] "phone mockup" card. On a real phone it shows as a tiny floating card.
App renders as a ~412px card centered in gray, with prototype header bar eating ~60px above it. Wasted space everywhere.
Phone fills the viewport edge-to-edge. Desktop ≥ 768px still gets the prototype frame + phone/tablet toggle (untouched).
md: breakpoint