Three root causes fixed:
1. Double safe-area padding: pwa.css set padding-top/bottom on body
globally, but page containers already account for safe-area-inset
in their height calculations. Removed body vertical padding (kept
only in standalone media query for padding-top).
2. Wrong nav token: all page containers used --nav-height-mobile (56px)
instead of --nav-bottom-height (68px = 56px scroll + 12px dots),
causing 12px of content to render behind the bottom nav.
3. Scroll bleed: fixed-height page containers lacked overflow:hidden,
allowing scroll events to propagate to the body. Added
overscroll-behavior-y:contain on app-content globally.
Fixes#16
Ulas
2508473265