function BottomNav({ active, onNav }) {
  const items = [
    { id: 'race',  label: 'My race',   icon: 'M12 2v4 M12 18v4 M2 12h4 M18 12h4' },
    { id: 'follow',label: 'Following', icon: 'M17 21v-2a4 4 0 0 0-4-4H5a4 4 0 0 0-4 4v2 M9 11a4 4 0 1 0 0-8 4 4 0 0 0 0 8 M23 21v-2a4 4 0 0 0-3-3.87 M16 3.13a4 4 0 0 1 0 7.75' },
    { id: 'find',  label: 'Find',      icon: 'M11 19a8 8 0 1 0 0-16 8 8 0 0 0 0 16 M21 21l-4.35-4.35' },
    { id: 'me',    label: 'Profile',   icon: 'M20 21v-2a4 4 0 0 0-4-4H8a4 4 0 0 0-4 4v2 M12 11a4 4 0 1 0 0-8 4 4 0 0 0 0 8' },
  ];
  return (
    <div style={{ display: 'grid', gridTemplateColumns: 'repeat(4, 1fr)', borderTop: '1px solid var(--ink)', background: 'var(--paper)' }}>
      {items.map(it => (
        <div key={it.id} onClick={() => onNav(it.id)} style={{ padding: '10px 0 6px', textAlign: 'center', cursor: 'pointer', borderTop: active === it.id ? '2px solid var(--flag)' : '2px solid transparent', marginTop: -1 }}>
          <svg width="22" height="22" viewBox="0 0 24 24" fill="none" stroke={active === it.id ? 'var(--flag)' : 'var(--ink-3)'} strokeWidth="2" strokeLinecap="round" strokeLinejoin="round" style={{ display: 'block', margin: '0 auto' }}>
            {it.icon.split(' M').map((d, i) => <path key={i} d={(i === 0 ? '' : 'M') + d} />)}
          </svg>
          <div style={{ fontFamily: 'var(--font-display)', fontSize: 10, fontWeight: 600, letterSpacing: '0.06em', textTransform: 'uppercase', marginTop: 4, color: active === it.id ? 'var(--flag)' : 'var(--ink-3)' }}>{it.label}</div>
        </div>
      ))}
    </div>
  );
}
window.BottomNav = BottomNav;