feat: add football net background pattern and glass card styling

Diagonal ±45° goal-net texture on body background. All card surfaces
converted from opaque #0a1810 to glass-card (backdrop-blur + semi-transparent
rgba) or glass-card-hero (gradient rgba) so the net pattern shows through.
Covers all pages: home, groups, history, search, stats, teams, tournaments,
players, match cards, and 404.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/players/[name]/page.tsx

@@ -65,10 +65,7 @@ export default function PlayerPage({ params }: { params: Promise<{ name: string
   return (
     <div className="max-w-[900px] mx-auto px-7 py-10 pb-16">
       {/* Hero */}
-      <div className="pitch-grid rounded-2xl p-8 mb-8" style={{
-        background: 'linear-gradient(145deg,#0a1a0e,#0d2416)',
-        border: '1px solid rgba(34,197,94,0.2)',
-      }}>
+      <div className="pitch-grid glass-card-hero rounded-2xl p-8 mb-8">
         <div className="flex items-center gap-6 flex-wrap">
           {player.team && <TeamFlag name={player.team.name} iso2={player.team.iso2} size="xl" />}
           <div>
@@ -94,7 +91,7 @@ export default function PlayerPage({ params }: { params: Promise<{ name: string
           { label: 'Penalties', value: player.penalties },
           { label: 'Tournaments', value: player.tournaments },
         ].map(item => (
-          <div key={item.label} className="rounded-xl p-4" style={{ background: '#0a1810', border: '1px solid rgba(34,197,94,0.12)' }}>
+          <div key={item.label} className="glass-card rounded-xl p-4">
             <div className="text-[9px] text-[#2a5c35] tracking-[0.1em] uppercase mb-1.5">{item.label}</div>
             <div className="font-['Bebas_Neue'] text-3xl text-[#22c55e]">{item.value}</div>
           </div>
@@ -102,7 +99,7 @@ export default function PlayerPage({ params }: { params: Promise<{ name: string
       </div>
 
       {player.ownGoals > 0 && (
-        <div className="mb-6 rounded-xl p-3 px-4 text-sm text-[#2a5c35]" style={{ background: '#0a1810', border: '1px solid rgba(34,197,94,0.08)' }}>
+        <div className="mb-6 glass-card rounded-xl p-3 px-4 text-sm text-[#2a5c35]">
           Includes {player.ownGoals} own goal{player.ownGoals !== 1 ? 's' : ''}
         </div>
       )}