The phone search field was forced to border-radius:999px. That looked out of place next to the 6px used everywhere else, and at that radius the 1px border vanished along both arcs - the element's overflow:hidden rounded clip cuts the outline, so the field read as a broken frame. Use var(--border-radius-sm, 6px), i.e. exactly the wide-screen value. Verified at 320/390/520/600 and focused, light and dark.