body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background: #0b1020;
  color: #e5e7eb;
}

#login-shell {
  width: min(480px, 90vw);
  margin: 12vh auto 0;
  padding: 24px;
  border-radius: 8px;
  background: #111827;
  border: 1px solid #1f2937;
}

h1 {
  margin-top: 0;
  font-size: 1.4rem;
}

#login-status {
  color: #93a3b8;
}

section {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid #1f2937;
}

section h2 {
  margin: 0 0 10px;
  font-size: 1.1rem;
}

#one-time-status,
#one-time-expire {
  color: #93a3b8;
}

#one-time-code {
  margin: 8px 0;
  font-size: 1.8rem;
  letter-spacing: 0.18rem;
  font-weight: 700;
}

button {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: 8px;
  border: 1px solid #374151;
  background: #1f2937;
  color: #e5e7eb;
  cursor: pointer;
}

button:disabled {
  opacity: 0.5;
  cursor: default;
}