/* ──────────────────────────────────────────────────────────────────────────────
 * AllocLab UI v5 — auth pages（Phase 5a）
 * /login /register /forgot-password /reset-password 4 頁共用
 *
 * 設計：登入前頁面、置中卡片 + Polaris brand mark + serif title
 * hide_app_nav = true（5-tab nav 不顯示）
 * ────────────────────────────────────────────────────────────────────────────── */

.au-shell {
  min-height: 100vh;
  min-height: 100dvh;        /* iOS Safari toolbar 動態高度、避免底部被切 */
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--sp-5) var(--pad-x);
  gap: var(--sp-4);
}

/* ---------- Brand header（置中、Polaris star + AllocLab）---------- */
.au-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--al-ink);
  margin-bottom: var(--sp-3);
}
.au-brand__mark {
  width: 28px;
  height: 28px;
  color: var(--al-accent);
  flex: 0 0 auto;
}
.au-brand__mark svg {
  width: 100%;
  height: 100%;
  display: block;
  overflow: visible;
}
.au-brand__word {
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--al-ink);
}
.au-brand__word em {
  font-style: italic;
  color: var(--al-accent);
}

/* ---------- Card ---------- */
.au-card {
  width: 100%;
  max-width: 400px;
  background: var(--al-surface);
  border: 1px solid var(--al-border-soft);
  border-radius: var(--radius-card);
  padding: var(--sp-5) var(--sp-4);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}

.au-card__title {
  font-family: var(--ff-display);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--al-ink-deep);
  letter-spacing: -0.01em;
  margin: 0;
  text-align: center;
}
.au-card__sub {
  font-size: var(--fs-sm);
  color: var(--al-ink-muted);
  line-height: 1.55;
  text-align: center;
  margin: 0;
}

/* ---------- Form fields ---------- */
.au-form {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}
.au-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.au-label {
  font-size: 0.7rem;
  color: var(--al-ink-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
}
.au-label__row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}
.au-label__hint {
  font-size: 0.7rem;
  color: var(--al-accent);
  letter-spacing: 0;
  text-transform: none;
  text-decoration: none;
}
.au-label__hint:hover { text-decoration: underline; }
.au-input {
  width: 100%;
  padding: 12px 14px;
  background: var(--al-surface-2);
  border: 1px solid var(--al-border-soft);
  border-radius: var(--radius-inner);
  color: var(--al-ink);
  /* iOS Safari mobile：16px 防 focus auto-zoom */
  font-size: 16px;
  font-family: inherit;
  outline: none;
  transition: border-color var(--t-fast) var(--ease);
  min-height: 44px;
}
@media (min-width: 768px) {
  .au-input { font-size: var(--fs-base); }
}
.au-input:focus { border-color: var(--al-accent); }
.au-input::placeholder { color: var(--al-ink-muted); }

/* ---------- M4f：審閱期文案（M7b-1、消保法 §11-1）---------- */
.au-consent-prompt {
  margin: 0 0 12px;
  padding: 8px 12px;
  border-left: 2px solid var(--al-accent);
  background: var(--al-surface);
  border-radius: var(--radius-inner);
  font-size: 0.78rem;
  line-height: 1.55;
  color: var(--al-ink-muted);
}

/* ---------- Consent block (register) ---------- */
.au-consent {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--sp-3);
  background: var(--al-surface-2);
  border-radius: var(--radius-inner);
  border: 1px solid var(--al-border-soft);
}
.au-consent__row {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--al-ink-2);
  line-height: 1.5;
  cursor: pointer;
  user-select: none;
}
.au-consent__row.is-optional { color: var(--al-ink-muted); }
.au-consent__row input[type=checkbox] {
  margin: 3px 0 0;
  flex: 0 0 auto;
  accent-color: var(--al-accent);
}
.au-consent__row a {
  color: var(--al-accent);
  text-decoration: none;
}
.au-consent__row a:hover { text-decoration: underline; }

/* ---------- Submit button ---------- */
.au-btn {
  width: 100%;
  padding: 12px;
  background: var(--al-accent);
  color: #fff;
  border-radius: var(--radius-inner);
  font-size: var(--fs-base);
  font-weight: 600;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  transition: background var(--t-fast) var(--ease);
}
.au-btn:hover:not(:disabled) { background: var(--al-accent-2); }
.au-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

/* ---------- OAuth divider + buttons ---------- */
.au-divider {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.7rem;
  color: var(--al-ink-muted);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin: 4px 0;
}
.au-divider::before,
.au-divider::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--al-border-soft);
}

.au-oauth {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.au-oauth__btn {
  width: 100%;
  padding: 10px 14px;
  background: var(--al-surface-2);
  color: var(--al-ink);
  border: 1px solid var(--al-border);
  border-radius: var(--radius-inner);
  font-size: var(--fs-base);
  font-weight: 500;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  position: relative;
  transition: background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease);
}
.au-oauth__btn:not(:disabled):hover {
  background: var(--al-active-bg);
  border-color: var(--al-accent);
}
.au-oauth__btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}
.au-oauth__btn .ico {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}
.au-oauth__btn .ico svg { width: 100%; height: 100%; display: block; }
.au-oauth__btn .lbl {
  flex: 1 1 auto;
  text-align: left;
}
.au-oauth__btn .badge {
  display: inline-flex;
  align-items: center;
  font-size: 0.65rem;
  font-weight: 600;
  color: var(--al-ink-muted);
  background: var(--al-bg);
  border: 1px solid var(--al-border-soft);
  border-radius: var(--radius-pill);
  padding: 2px 8px;
  letter-spacing: 0.04em;
}

/* ---------- Status messages ---------- */
.au-err {
  font-size: var(--fs-sm);
  color: var(--al-error);
  line-height: 1.5;
  margin: 0;
}
.au-ok {
  font-size: var(--fs-sm);
  color: var(--al-dn);
  line-height: 1.5;
  margin: 0;
}
.au-info {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  background: var(--al-active-bg);
  border: 1px solid var(--al-accent);
  border-radius: var(--radius-inner);
  font-size: 0.78rem;
  color: var(--al-ink-2);
  line-height: 1.5;
}
.au-info svg {
  width: 16px;
  height: 16px;
  color: var(--al-accent);
  flex: 0 0 auto;
  margin-top: 2px;
}
.au-info strong { color: var(--al-ink); font-weight: 600; }

/* ---------- Bottom links ---------- */
.au-links {
  text-align: center;
  font-size: var(--fs-sm);
  color: var(--al-ink-muted);
}
.au-links a {
  color: var(--al-accent);
  text-decoration: none;
}
.au-links a:hover { text-decoration: underline; }

/* ---------- Footer (legal) ---------- */
.au-foot {
  text-align: center;
  font-size: 0.7rem;
  color: var(--al-ink-muted);
  line-height: 1.7;
  max-width: 400px;
}
.au-foot a {
  color: var(--al-ink-2);
  text-decoration: none;
}
.au-foot a:hover { color: var(--al-accent); }
.au-foot__sep { color: var(--al-border); margin: 0 6px; }

/* ---------- Desktop ≥768 ---------- */
@media (min-width: 768px) {
  .au-card {
    padding: var(--sp-6) var(--sp-5);
  }
}