feat: comprehensive light theme support across entire site

- CSS foundation: theme-aware scrollbars, section glows, glass cards with
  gold shadows, stronger animated borders and glow effects for light mode
- Hero: consistent dark-video treatment for both themes, brighter gold
  gradient text, glowing CTA button
- Gradient text: auto-switch to warm gold tones on light backgrounds via
  html:not(.dark) selector
- Team profile: inverted ambient photo bg with white overlay for light,
  dark text/borders, gold-dark labels for contrast
- All sections: text-neutral-500→600 upgrades for WCAG AA contrast,
  gold shadow accents on cards (About, Pricing, FAQ, DayCard, News)
- Admin: replaced hardcoded #c9a96e with theme tokens, fixed select
  options, array editor borders, booking badges contrast
- Header: white text on transparent hero, dark text after scroll
- UI components: BackToTop, FloatingHearts, ShowcaseLayout tabs,
  SignupModal, NewsModal, GroupCard adapted for light backgrounds
- Updated CLAUDE.md to reflect dual theme support

src/components/sections/About.tsx

@@ -47,7 +47,7 @@ export function About({ data: about, stats }: AboutProps) {
               <div
                 key={i}
                 aria-label={stat.ariaLabel}
-                className="group flex flex-col items-center gap-3 rounded-2xl border border-neutral-200 bg-white/50 p-6 transition-all duration-300 hover:border-gold/30 sm:p-8 dark:border-white/[0.06] dark:bg-white/[0.02] dark:hover:border-gold/20"
+                className="group flex flex-col items-center gap-3 rounded-2xl border border-neutral-200 bg-white/80 p-6 shadow-sm shadow-gold/[0.06] transition-all duration-300 hover:border-gold/30 hover:shadow-md hover:shadow-gold/[0.1] sm:p-8 dark:border-white/[0.06] dark:bg-white/[0.02] dark:shadow-none dark:hover:border-gold/20 dark:hover:shadow-none"
               >
                 <div className="flex h-11 w-11 items-center justify-center rounded-xl bg-gold/10 text-gold-dark transition-colors group-hover:bg-gold/20 dark:text-gold-light" aria-hidden="true">
                   {stat.icon}