/* ── Auth Shell: Full-bleed hero ── */
.auth-shell {
  position: relative;
  min-block-size: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-lg);
  background:
    radial-gradient(circle at 18% 14%, color-mix(in srgb, var(--color-primary) 22%, transparent), transparent 46%),
    radial-gradient(circle at 84% 86%, color-mix(in srgb, var(--color-warning) 14%, transparent), transparent 52%),
    var(--theme-surface);
  overflow: hidden;
}

/* Dot grid overlay — matches /app/home hero */
.auth-shell__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.15;
  background-image: radial-gradient(circle at center, var(--home-hero-grid-dot, var(--theme-muted)) 1px, transparent 1px);
  background-size: var(--space-xl) var(--space-xl);
  z-index: 1;
}

/* Tagline below card */
.auth-shell__tagline {
  position: relative;
  z-index: 10;
  margin-block-start: var(--space-lg);
  font-size: var(--text-sm);
  color: var(--theme-muted);
  text-align: center;
}

/* ── Glass morphism card ── */
.auth-card {
  position: relative;
  z-index: 10;
  inline-size: 100%;
  max-inline-size: 26rem;
  background: color-mix(in srgb, var(--theme-card) 85%, transparent);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid color-mix(in srgb, var(--theme-border) 60%, transparent);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-xl);
  display: grid;
  gap: var(--space-lg);
}

/* ── Brand logo block ── */
.auth-card__brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
}

.auth-card__logo {
  block-size: 2.5rem;
  inline-size: auto;
}

/* ── Card elements ── */
.auth-card__back-link {
  font-size: var(--text-sm);
  color: var(--theme-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.auth-card__back-link:hover {
  color: var(--theme-text);
}

.auth-card__header {
  text-align: center;
  display: grid;
  gap: var(--space-xs);
}

.auth-card__title {
  font-size: var(--text-xl);
  font-weight: 700;
  margin: 0;
}

.auth-card__subtitle {
  font-size: var(--text-sm);
  color: var(--theme-muted);
  margin: 0;
}

.auth-card__form {
  display: grid;
  gap: var(--space-md);
}

.auth-card__oauth-form {
  inline-size: 100%;
}

.auth-card__oauth-button {
  inline-size: 100%;
}

.auth-card__options {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.auth-card__inline-link {
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
}

.auth-card__inline-link:hover {
  text-decoration: underline;
}

.auth-card__divider {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--theme-muted);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.auth-card__divider::before,
.auth-card__divider::after {
  content: "";
  flex: 1;
  block-size: 1px;
  background: var(--theme-border);
}

.auth-card__footer {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--theme-muted);
  margin: 0;
}

.auth-card__footer a {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: none;
}

.auth-card__footer a:hover {
  text-decoration: underline;
}

/* ── Glass form inputs (scoped to auth card) ── */
.auth-card .form-input {
  background: color-mix(in srgb, var(--theme-card) 70%, transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-color: color-mix(in srgb, var(--theme-border) 50%, transparent);
}

.auth-card .form-input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px color-mix(in srgb, var(--color-primary) 20%, transparent);
  background: color-mix(in srgb, var(--theme-card) 90%, transparent);
}

/* ── Checkbox ── */
.form-checkbox {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: var(--text-sm);
  color: var(--theme-text);
  cursor: pointer;
}

.form-checkbox__input {
  accent-color: var(--color-primary);
  inline-size: 1rem;
  block-size: 1rem;
  margin: 0;
  cursor: pointer;
}

.form-checkbox__label {
  user-select: none;
}

/* ── Focus & accessibility ── */
.auth-card :focus-visible {
  outline: 2px solid var(--color-focus-ring);
  outline-offset: 2px;
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .auth-card,
  .auth-card__back-link {
    transition: none;
  }
}