*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }
body {
  margin: 0;
  min-height: 100dvh;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #eef4ff;
  background: radial-gradient(circle at top, #1f4ed8, #081326 52%, #030712);
}
button { font: inherit; min-height: 44px; touch-action: manipulation; }
.auth-shell {
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: max(20px, env(safe-area-inset-top)) 16px max(20px, env(safe-area-inset-bottom));
}
.auth-card {
  width: min(100%, 440px);
  padding: 24px;
  border: 1px solid rgba(255,255,255,.14);
  border-radius: 28px;
  background: rgba(8, 19, 38, .82);
  box-shadow: 0 24px 80px rgba(0,0,0,.34);
  backdrop-filter: blur(18px);
}
.brand { font-weight: 800; color: #7dd3fc; }
h1 { margin: 12px 0 8px; font-size: clamp(28px, 8vw, 40px); line-height: 1.05; }
p { color: #cbd5e1; }
button {
  width: 100%;
  border: 0;
  border-radius: 16px;
  color: #06111f;
  background: #7dd3fc;
  font-weight: 800;
}
.diagnostics {
  margin: 18px 0 0;
  display: grid;
  gap: 8px;
  color: #cbd5e1;
  font-size: 13px;
}
.diagnostics div { display: flex; justify-content: space-between; gap: 12px; }
.diagnostics dt { color: #94a3b8; }
.diagnostics dd { margin: 0; text-align: end; }