.auth-shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: var(--space-12) var(--space-4);
  background:
    radial-gradient(circle at 0% 0%, rgba(1,105,111,.12), transparent 55%),
    radial-gradient(circle at 100% 100%, rgba(1,105,111,.08), transparent 55%),
    var(--color-bg);
}

.auth-card {
  width: min(560px, 100%);
  background: var(--color-surface);
  border-radius: 28px;
  padding: var(--space-8);
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(40,37,29,.08);
}

.auth-card .brand {
  margin-bottom: var(--space-6);
}

.auth-card h1 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  line-height: 1;
  letter-spacing: -0.05em;
  margin-bottom: var(--space-3);
}

.auth-card p.muted {
  margin-bottom: var(--space-6);
}

.auth-form {
  display: grid;
  gap: var(--space-4);
}

.auth-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.auth-form label span {
  display: block;
  margin-bottom: .25rem;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--color-text-faint);
  font-weight: 700;
}

.auth-form input,
.auth-form select {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(40,37,29,.12);
  padding: .75rem .9rem;
  font-size: var(--text-sm);
  background: white;
  color: var(--color-text);
}

.auth-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: .25rem;
  font-size: var(--text-xs);
}

.auth-errors {
  margin-bottom: var(--space-4);
  padding: .75rem .9rem;
  border-radius: 16px;
  background: #fbe6ea;
  color: #8a1f3d;
  font-size: var(--text-xs);
}

.auth-success {
  margin-bottom: var(--space-4);
  padding: .85rem 1rem;
  border-radius: 16px;
  background: #e7f6ee;
  color: #1d5a3a;
  font-size: var(--text-sm);
  border: 1px solid rgba(29,90,58,.12);
}

.auth-footer-note {
  margin-top: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 640px) {
  .auth-grid {
    grid-template-columns: 1fr;
  }
  .auth-card {
    padding: var(--space-6);
  }
}