.auth-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.auth-topbar {
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.auth-topbar__logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.2rem;
  color: var(--color-primary-ink);
}

.auth-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
}

.auth-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-7) var(--space-6);
  max-width: 400px;
  width: 100%;
  text-align: center;
  animation: fadeInUp 0.4s ease both;
}

.auth-card h1 {
  font-size: 1.6rem;
}

.auth-card__subtitle {
  margin-top: var(--space-3);
  color: var(--color-text-secondary);
  line-height: 1.55;
  font-size: 0.95rem;
}

.auth-providers {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.auth-provider-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: 12px var(--space-5);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  color: var(--color-text);
  transition: border-color 0.15s ease, color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease;
}

.auth-provider-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-ink);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.auth-provider-btn:active {
  transform: translateY(0);
}

.auth-provider-btn__icon {
  width: 20px;
  height: 20px;
  flex: none;
}

.auth-note {
  margin-top: var(--space-6);
  font-size: 0.78rem;
  color: var(--color-text-faint);
  line-height: 1.5;
}

.auth-loading {
  display: none;
  margin-top: var(--space-6);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
}

.auth-loading.is-visible {
  display: block;
}

/* Proveedor todavía no disponible (GitHub) */
.auth-provider-btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}