\
/* Premium Academy polish */
:root { color-scheme: dark; }
.glass {
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
  backdrop-filter: blur(10px);
}
.hero-grad {
  background:
    radial-gradient(900px 400px at 20% 0%, rgba(16,185,129,0.25), transparent 60%),
    radial-gradient(900px 500px at 80% 10%, rgba(59,130,246,0.20), transparent 55%),
    radial-gradient(900px 500px at 50% 120%, rgba(236,72,153,0.12), transparent 60%);
}