.auth-shell {
  min-height: 100%;
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 20px 16px 32px;
  background:
    radial-gradient(100% 60% at 50% -10%, rgba(255, 255, 255, 0.5), transparent 50%),
    linear-gradient(165deg, #d9d2c4 0%, var(--bg-deep) 45%, #cfc6b6 100%);
  color: var(--ink);
  font-family: var(--font-ui);
}

.auth-card {
  width: min(420px, 100%);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 18px;
  padding: 22px 18px 28px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-panel);
  background: rgba(250, 247, 241, 0.94);
  box-shadow: var(--shadow-soft);
}

.auth-card__head h1 {
  margin: 12px 0 8px;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 600;
  line-height: 1.15;
}

.auth-card__head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.45;
}

.auth-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.35);
}

.auth-tab {
  min-height: 42px;
  border-radius: 4px;
  font-weight: 600;
  color: var(--ink-muted);
  background: transparent;
  border: none;
}

.auth-tab.is-active {
  background: var(--ink);
  color: var(--bg-elevated);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.auth-error {
  margin: 0;
  padding: 10px 12px;
  border-radius: var(--radius);
  border: 1px solid rgba(160, 50, 40, 0.35);
  background: rgba(160, 50, 40, 0.08);
  color: var(--danger, #8b2e24);
  font-size: 0.88rem;
  line-height: 1.35;
}

.auth-footnote {
  margin: 0;
  text-align: center;
  font-size: 0.88rem;
}

.auth-footnote a {
  color: var(--ink-soft);
  font-weight: 600;
  text-decoration: none;
}

.auth-session {
  margin: 0;
  font-size: 0.78rem;
  color: var(--ink-muted);
  letter-spacing: 0.02em;
}

.auth-session strong {
  color: var(--ink-soft);
  font-weight: 600;
}