.auth-body {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
}
.auth-card {
  width: 100%;
  max-width: 360px;
  background: var(--paper-raised);
  border: 1px solid var(--line);
  border-radius: 3px;
  box-shadow: var(--shadow);
  padding: 30px 28px;
  margin: 20px;
}
.auth-card h1 { margin: 0 0 4px; font-size: 1.5rem; text-align: center; }
.auth-subtitle {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--brass-dark);
  text-align: center;
  margin: 0 0 18px;
}
.auth-note {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.78rem;
  color: var(--slate);
  text-align: center;
  margin: 0 0 18px;
}
.auth-error {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.8rem;
  color: var(--bad);
  min-height: 1.2em;
  margin-top: 8px;
}
.auth-version {
  font-family: "Helvetica Neue", Arial, sans-serif;
  font-size: 0.68rem;
  color: var(--slate);
  text-align: center;
  margin: 20px 0 0;
  letter-spacing: 0.04em;
}