body {
  background-image:
    radial-gradient(circle at top left, rgba(14, 165, 233, 0.08), transparent 40%),
    linear-gradient(180deg, #f8fafc 0%, #eef2f7 100%);
}

.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background:
    radial-gradient(circle at 20% 20%, rgba(14, 165, 233, 0.18), transparent 35%),
    radial-gradient(circle at 80% 0%, rgba(34, 197, 94, 0.12), transparent 30%),
    linear-gradient(160deg, #0b1220 0%, #111827 45%, #0f172a 100%);
}

.auth-card {
  width: 100%;
  max-width: 28rem;
  border-radius: 1rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.96);
  padding: 2rem;
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
}

.fade-in {
  animation: fadeIn 0.35s ease-out;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}