body.auth-body {
  min-height: 100vh;
  margin: 0;
  background: linear-gradient(160deg, #0b1f3a 0%, #123a66 45%, #0d6efd 140%);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
.auth-shell { width: 100%; max-width: 420px; padding: 1rem; }
.auth-card {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 12px 40px rgba(0,0,0,.25);
}
.auth-brand h1 { letter-spacing: -0.02em; }