Restructures app/static/index.html's visual design without touching any JS
logic or element IDs:
- Typography switched to IBM Plex Sans (financial/trustworthy pairing),
Fira Code kept for addresses and numeric mono values.
- Design tokens extended with elevation shadows, an inset-surface color,
and a scaled border-radius system; cards/buttons get subtle depth instead
of flat borders.
- Navigation goes adaptive: a native-app-style fixed bottom tab bar on
mobile (thumb-reachable), promoted back to an inline tab strip once the
viewport is wide enough (>=720px) to fit one comfortably under the header.
- Top bar decluttered: balance shown as a highlighted pill (icon + value),
Guida/Segnala un bug/Esci condensed into icon buttons with tooltips and
aria-labels instead of full-text links.
- Round-status card gets a subtle gradient "hero" treatment to read as the
central live widget of the dashboard.
- Content width now adapts from 480px (mobile) to 620px (>=720px) instead
of staying phone-narrow on desktop; safe-area insets reserved for the
fixed bottom bar and toast stack.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>