/* ═══════════════════════════════════
   AUTH / SITE MODALS — 全站公開頁樣式
   login/signup/submit/finish modal、#auth-redirect-overlay、
   登入表單、guest header CTA、guest-pitch、unload-guard、
   result-login-inline、#hdr-revisit-tag

   2026-07-17 自 admin.css 抽出：admin.css 2026-07-07 起改由
   admin.js 動態注入，這段公開站規則被一起拖下水 → 公開頁
   modal 全部裸奔在頁面底部（display:none 基礎規則消失）。
   本檔必須在 index.html 靜態 <link> 全站載入。
═══════════════════════════════════ */
/* ═══════════════════════════════════
   MODALS
═══════════════════════════════════ */
.modal-overlay {
  display: none; position: fixed; inset: 0; z-index: 100;
  background: rgba(0,0,0,.48); backdrop-filter: blur(3px);
  align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.open { display: flex; }
.modal {
  position: relative;
  background: var(--c-surface); border-radius: var(--r-xl);
  padding: 24px; width: 100%; max-width: 400px;
  max-height: calc(100vh - 40px); overflow-y: auto;
  box-shadow: var(--shadow-lg);
  animation: modalIn .2s ease;
}
.modal-x {
  position: absolute; top: 10px; right: 12px;
  width: 32px; height: 32px; border-radius: 50%;
  background: transparent; border: none; cursor: pointer;
  font-size: 1.2rem; line-height: 1; color: var(--c-muted);
  display: flex; align-items: center; justify-content: center;
  transition: background .15s, color .15s;
  z-index: 2;
}
.modal-x:hover { background: var(--c-surface2); color: var(--c-text); }
.modal-x:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 2px; }
@keyframes modalIn { from { transform: translateY(16px) scale(.97); opacity: 0; } to { transform: none; opacity: 1; } }

/* Google redirect 回來的 loading overlay（手機 redirect 流程多次跳轉，
   防止使用者以為失敗。signInGoogle 設 sessionStorage flag → page load
   立即顯示 → getRedirectResult 完成或 onAuthStateChanged 抵達後消失） */
#auth-redirect-overlay {
  position: fixed; inset: 0; z-index: 9999;
  display: flex; align-items: center; justify-content: center;
  background: rgba(15,15,16,.72); backdrop-filter: blur(8px);
  transition: opacity .2s ease;
  animation: arOverlayIn .25s ease;
}
@keyframes arOverlayIn { from { opacity: 0; } to { opacity: 1; } }
#auth-redirect-overlay .auth-redir-card {
  background: var(--c-surface, #fff);
  border-radius: 16px;
  padding: 30px 36px;
  display: flex; flex-direction: column; align-items: center; gap: 14px;
  box-shadow: 0 12px 36px rgba(0,0,0,.25);
  max-width: min(360px, calc(100vw - 40px));
  text-align: center;
}
#auth-redirect-overlay .auth-redir-spinner {
  width: 38px; height: 38px;
  border: 3px solid color-mix(in oklch, var(--c-primary, #b23a2b) 25%, transparent);
  border-top-color: var(--c-primary, #b23a2b);
  border-radius: 50%;
  animation: arSpin .9s linear infinite;
}
@keyframes arSpin { to { transform: rotate(360deg); } }
#auth-redirect-overlay .auth-redir-text {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.05rem; font-weight: 700;
  color: var(--c-text, #1a1a1d);
}
#auth-redirect-overlay .auth-redir-sub {
  font-size: .82rem; color: var(--c-muted, #666);
}
@media (prefers-reduced-motion: reduce) {
  #auth-redirect-overlay .auth-redir-spinner { animation: none; border-top-color: var(--c-primary); }
}
.modal h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 14px; }
.modal-row { display: flex; gap: 8px; margin-top: 16px; }
.modal-row > * { flex: 1; }

.form-group { margin-bottom: 12px; }
.form-group label { display: block; font-size: .8rem; font-weight: 600; color: var(--c-muted); margin-bottom: 5px; }
.form-inp {
  width: 100%; padding: 10px 12px;
  background: var(--c-surface2); border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm); font-size: .9rem; transition: border-color .15s;
}
.form-inp:focus { outline: none; border-color: var(--c-primary); }
.err-text { font-size: .82rem; color: var(--c-danger); margin-top: 6px; }
.divider-or {
  text-align: center; color: var(--c-muted); font-size: .78rem;
  position: relative; margin: 12px 0;
}
.divider-or::before,.divider-or::after {
  content: ''; position: absolute; top: 50%; height: 1px;
  background: var(--c-border); width: 44%;
}
.divider-or::before { left: 0; } .divider-or::after { right: 0; }
.google-btn {
  width: 100%; padding: 10px 14px;
  display: flex; align-items: center; justify-content: center; gap: 9px;
  background: var(--c-surface2); border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm); font-size: .9rem; font-weight: 600; color: var(--c-text);
  cursor: pointer; transition: all .15s;
}
.google-btn:hover { border-color: var(--c-primary); }
.login-sub { font-size: .8rem; color: var(--c-muted); text-align: center; margin-bottom: 16px; }

/* ─ Login / Signup modal: 密碼欄下方忘記密碼 + 底部模式切換 + 密碼可視 toggle ─ */
.forgot-row {
  display: flex; justify-content: flex-end;
  margin-top: 6px;
}
.forgot-link {
  background: none; border: none; padding: 0;
  font-size: .76rem; color: var(--c-muted);
  cursor: pointer; text-decoration: underline;
}
.forgot-link:hover { color: var(--c-primary); }

.auth-switch-row {
  text-align: center;
  margin-top: 14px; padding-top: 12px;
  border-top: 1px solid var(--c-border);
  font-size: .82rem; color: var(--c-muted);
}
.auth-switch-row .link-btn {
  background: none; border: none; padding: 0;
  color: var(--c-primary); font-size: inherit; font-weight: 600;
  cursor: pointer; text-decoration: underline; margin-left: 4px;
}
.auth-switch-row .link-btn:hover { text-decoration: none; }

.pw-wrap { position: relative; }
.pw-wrap .pw-inp { padding-right: 44px; }

/* 保持登入 checkbox — 預設勾選（=Firebase LOCAL，跨瀏覽器重啟記住）；
   取消 = SESSION（關瀏覽器自動登出，共用裝置適用） */
.login-remember {
  display: flex; align-items: center; gap: 8px;
  margin: 12px 0 0; padding: 0;
  font-size: .82rem; color: var(--c-muted);
  cursor: pointer; user-select: none;
}
.login-remember input[type="checkbox"] {
  width: 16px; height: 16px;
  accent-color: var(--c-primary);
  cursor: pointer; margin: 0;
}
.login-remember:hover { color: var(--c-text); }
.login-remember input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--c-primary); outline-offset: 2px;
}
.pw-toggle {
  position: absolute; top: 50%; right: 5px;
  transform: translateY(-50%);
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; border-radius: 6px;
  color: var(--c-muted); cursor: pointer;
  transition: color .15s, background .15s;
}
.pw-toggle:hover { color: var(--c-primary); background: var(--c-surface); }
.pw-toggle:focus-visible { outline: 2px solid var(--c-primary); outline-offset: 1px; }
[data-theme="dark"] .pw-toggle:hover { background: var(--c-bg); }
.pw-hint { font-size: .72rem; color: var(--c-muted); font-weight: 400; }

/* ─ Login modal: member benefits panel ─────────────────── */
.modal-login { max-width: 400px; padding: 22px 22px 18px; }
.login-benefits {
  list-style: none; padding: 0; margin: 2px 0 12px;
  border: 1.5px solid var(--c-border); border-radius: 10px;
  background: var(--c-surface2); overflow: hidden;
}
.login-benefits li {
  display: flex; gap: 10px; align-items: flex-start;
  padding: 7px 11px;
  font-size: .8rem; line-height: 1.4; color: var(--c-text);
  border-bottom: 1px solid var(--c-border);
}
.login-benefits li:last-child { border-bottom: none; }
.login-benefits .lb-icon {
  flex-shrink: 0; width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-primary); color: white;
  border-radius: 50%; font-size: .78rem; font-weight: 700;
  margin-top: 1px;
}
.login-benefits .lb-body strong { color: var(--c-primary); font-weight: 700; }
.login-free-tag {
  text-align: center; color: var(--c-success); font-weight: 700;
  font-size: .78rem; margin-top: 10px; letter-spacing: .03em;
}
/* Magic link 免密碼登入按鈕 — 比 Google / 主登入按鈕細一階，視為輔助選項 */
.magic-link-btn {
  width: 100%; margin-top: 10px;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 9px 14px;
  font-size: .85rem; font-weight: 600;
  background: var(--c-surface2);
  border: 1.5px solid var(--c-border);
  color: var(--c-text);
}
.magic-link-btn:hover { border-color: var(--c-primary); color: var(--c-primary); }
.magic-link-btn svg { flex-shrink: 0; opacity: .7; }
.magic-link-btn:hover svg { opacity: 1; }

/* ─ Header: prominent CTA when guest ────────────────────── */
#login-btn.guest {
  background: var(--c-primary) !important;
  border-color: var(--c-primary) !important;
  color: white !important;
}
#login-btn.guest:hover { filter: brightness(1.08); }
#login-btn.guest .user-avatar {
  background: rgba(255,255,255,.22); color: white;
}
[data-theme="dark"] #login-btn.guest { color: var(--c-primary-fg) !important; }

/* ─ Home: guest single-column "登入後可以做" ─────────────── */
.guest-pitch {
  background: linear-gradient(180deg, transparent 0, var(--c-surface) 30%);
  border-radius: 16px;
}
.guest-pitch .pitch-card {
  background: var(--c-surface);
  border: 1.5px solid var(--c-primary);
  border-radius: 16px;
  padding: 28px 28px 24px;
  margin-top: 18px;
  box-shadow: 0 4px 18px rgba(178,58,43,.08);
  position: relative;
  max-width: 640px;
  margin-left: auto; margin-right: auto;
}
.guest-pitch .pitch-free {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(127,169,104,.12); color: var(--c-success);
  padding: 5px 11px; border-radius: 99px;
  font-size: .7rem; font-weight: 700; letter-spacing: .06em;
  margin-bottom: 14px;
}
[data-theme="dark"] .guest-pitch .pitch-free { background: rgba(127,169,104,.18); }
.guest-pitch .pitch-h {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.4rem; font-weight: 700; margin-bottom: 6px;
  letter-spacing: -.01em; color: var(--c-text);
}
.guest-pitch .pitch-lead {
  color: var(--c-muted); font-size: .88rem; margin-bottom: 18px; line-height: 1.5;
}
.guest-pitch ul {
  list-style: none; padding: 0; margin: 0 0 20px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px;
}
.guest-pitch ul li {
  font-size: .88rem; line-height: 1.5; padding: 5px 0;
  color: var(--c-text); display: flex; gap: 9px; align-items: flex-start;
}
.guest-pitch ul li::before {
  content: ''; flex-shrink: 0; width: 18px; height: 18px;
  border-radius: 50%; background: var(--c-primary);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: 12px; background-repeat: no-repeat; background-position: center;
  margin-top: 2px;
}
.guest-pitch ul li strong { font-weight: 700; color: var(--c-primary); }
.guest-pitch .pitch-cta {
  display: block; width: 100%;
  padding: 14px 18px;
  background: var(--c-primary); color: white;
  border: none; border-radius: 10px;
  font-size: 1rem; font-weight: 700; letter-spacing: .02em;
  cursor: pointer;
}
.guest-pitch .pitch-cta:hover { filter: brightness(1.08); }
[data-theme="dark"] .guest-pitch .pitch-cta { color: var(--c-primary-fg); }
.guest-pitch .pitch-foot {
  text-align: center; color: var(--c-muted);
  font-size: .75rem; margin-top: 12px; line-height: 1.5;
}
@media (max-width: 540px) {
  .guest-pitch .pitch-card { padding: 22px 18px 20px; }
  .guest-pitch .pitch-h { font-size: 1.2rem; }
  .guest-pitch ul { grid-template-columns: 1fr; gap: 4px; }
}

/* ─ Loss-aversion: 離站攔截 modal（訪客 ≥20 題切走時觸發） ── */
.unload-guard {
  display: none; position: fixed; inset: 0; z-index: 110;
  background: rgba(0,0,0,.55); backdrop-filter: blur(4px);
  align-items: center; justify-content: center; padding: 20px;
  animation: ugFade .2s ease;
}
.unload-guard.open { display: flex; }
@keyframes ugFade { from { opacity: 0 } to { opacity: 1 } }
.unload-guard .ug-card {
  position: relative;
  background: var(--c-surface); border-radius: 16px;
  border: 2px solid var(--c-primary);
  padding: 26px 24px 22px;
  width: 100%; max-width: 400px;
  max-height: calc(100vh - 40px); overflow-y: auto;
  box-shadow: 0 12px 36px rgba(0,0,0,.20);
  animation: ugIn .25s cubic-bezier(.2,.9,.3,1.1);
}
@keyframes ugIn { from { transform: translateY(20px) scale(.96); opacity: 0 } to { transform: none; opacity: 1 } }
.unload-guard .ug-eyebrow {
  font-size: .72rem; color: var(--c-warning); font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 8px;
}
.unload-guard .ug-h {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.3rem; font-weight: 700; line-height: 1.35;
  color: var(--c-text); margin-bottom: 14px; letter-spacing: -.01em;
}
.unload-guard .ug-stats {
  display: flex; gap: 16px;
  background: var(--c-surface2); border: 1px solid var(--c-border);
  border-radius: 10px; padding: 14px 16px; margin-bottom: 16px;
}
.unload-guard .ug-stat { flex: 1; }
.unload-guard .ug-stat-num {
  font-family: 'Noto Serif TC', serif;
  font-size: 1.5rem; font-weight: 700; color: var(--c-primary);
  line-height: 1;
}
.unload-guard .ug-stat-label {
  font-size: .72rem; color: var(--c-muted); margin-top: 4px;
}
.unload-guard .ug-text {
  font-size: .88rem; color: var(--c-text); line-height: 1.55; margin-bottom: 18px;
}
.unload-guard .ug-text strong { color: var(--c-primary); }
.unload-guard .ug-actions { display: flex; flex-direction: column; gap: 8px; }
.unload-guard .ug-cta {
  width: 100%; padding: 13px 18px;
  background: var(--c-primary); color: white;
  border: none; border-radius: 10px;
  font-size: .96rem; font-weight: 700;
  cursor: pointer;
}
.unload-guard .ug-cta:hover { filter: brightness(1.08); }
[data-theme="dark"] .unload-guard .ug-cta { color: var(--c-primary-fg); }
.unload-guard .ug-skip {
  width: 100%; padding: 10px;
  background: transparent; border: none;
  color: var(--c-muted); font-size: .82rem; cursor: pointer;
}
.unload-guard .ug-skip:hover { color: var(--c-text); }

/* ─ Result-page inline CTA + 第 3 次回訪 header tag ─────── */
.result-login-inline {
  margin: 24px auto 8px; max-width: 560px;
  background: var(--c-surface); border: 1.5px solid var(--c-border);
  border-left: 4px solid var(--c-primary);
  border-radius: 10px; padding: 14px 16px;
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.result-login-inline .rli-icon {
  flex-shrink: 0; width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  background: var(--c-primary); color: white; border-radius: 50%;
  font-size: 1rem;
}
.result-login-inline .rli-body { flex: 1; min-width: 200px; }
.result-login-inline .rli-title { font-weight: 700; font-size: .9rem; color: var(--c-text); margin-bottom: 2px; }
.result-login-inline .rli-text { font-size: .78rem; color: var(--c-muted); line-height: 1.4; }
.result-login-inline .rli-cta {
  flex-shrink: 0;
  padding: 9px 14px; border: none; border-radius: 8px;
  background: var(--c-primary); color: white;
  font-weight: 700; font-size: .82rem; cursor: pointer;
}
.result-login-inline .rli-cta:hover { filter: brightness(1.08); }
[data-theme="dark"] .result-login-inline .rli-cta { color: var(--c-primary-fg); }

#hdr-revisit-tag {
  display: none; font-size: .68rem; color: var(--c-muted);
  margin-right: 6px; line-height: 1.3; text-align: right;
  max-width: 110px;
}
#hdr-revisit-tag.show { display: inline-block; }
#hdr-revisit-tag strong { color: var(--c-primary); font-weight: 700; }
@media (max-width: 540px) { #hdr-revisit-tag { display: none !important; } }