.auth-shell {
  width: min(100% - 2rem, 30rem);
  min-height: calc(100dvh - 12rem);
  margin-inline: auto;
  padding-block: clamp(2rem, 8vh, 6rem);
  display: grid;
  align-content: center;
  gap: var(--space-8);
}

.auth-brand {
  width: 9rem;
  margin-inline: auto;
}

.auth-card {
  padding: clamp(1.5rem, 6vw, 3rem);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-default);
  box-shadow: var(--shadow-lg);
}

.login-page .auth-card,
.signup-page .auth-card {
  --stack-space: var(--space-6);
}

.auth-card h1,
.auth-intro,
.auth-success,
.auth-switch {
  margin: 0;
}

.auth-card h1 {
  font-size: clamp(2rem, 8vw, 3rem);
}

.login-page h1,
.signup-page h1 {
  text-align: center;
}

.auth-intro,
.auth-switch {
  color: var(--color-muted);
}

.auth-field {
  display: grid;
  gap: var(--space-2);
  color: var(--color-muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

.auth-field input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  color: var(--color-text);
  background: var(--color-bg);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-control);
}

.auth-field input:focus {
  border-color: var(--color-primary);
  outline: 2px solid transparent;
  box-shadow: var(--shadow-focus);
}

.auth-form button,
.auth-primary-link,
.google-button {
  min-height: 2.8rem;

  display: flex;
  align-items: center;
  justify-content: center;

  padding-inline: var(--space-4);

  color: var(--color-on-primary);
  background: var(--color-primary);
  border: 0;
  border-radius: var(--radius-control);

  font-weight: 800;
  text-decoration: none;

  cursor: pointer;
}

.auth-form button:hover,
.auth-primary-link:hover,
.google-button:hover {
  filter: brightness(1.08);
}

.google-button {
  gap: var(--space-3);
  color: var(--color-text);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-strong);
}

.google-mark {
  width: 1.4rem;
  height: 1.4rem;
}

.auth-minor-link,
.auth-switch a,
.auth-link-button {
  color: var(--color-primary);
}

.auth-minor-link {
  width: max-content;
  font-size: 0.75rem;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  color: var(--color-muted);
  font-size: 0.75rem;
}

.auth-divider::before,
.auth-divider::after {
  content: "";
  height: 1px;
  flex: 1;
  background: var(--color-border);
}

.auth-error,
.auth-success {
  margin: 0;
  padding: var(--space-3);
  border-radius: var(--radius-control);
  font-size: 0.85rem;
}

.auth-error {
  color: var(--color-danger);
  background: var(--color-danger-surface);
  border: 1px solid var(--color-danger-border);
}

.auth-success {
  color: var(--color-primary);
  border: 1px solid var(--color-border-accent);
}

.auth-switch {
  text-align: center;
  font-size: 0.78rem;
}

.resend-form {
  margin: 0;
}

.auth-link-button {
  padding: 0;
  background: none;
  border: 0;
  text-decoration: underline;
  cursor: pointer;
}