:root {
  --bg: #f6f3ee;
  --surface: #ffffff;
  --subtle: #efe9e1;
  --text: #2a2522;
  --muted: #857a70;
  --line: #e4ddd3;
  --primary: #e8553d;
  --primary-ink: #ffffff;
  --ok: #2f8a57;
  --danger: #c93a3a;
  --radius: 14px;
  font-family: system-ui, -apple-system, "Segoe UI", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  color: var(--text);
  background: var(--bg);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1917; --surface: #262320; --subtle: #2f2b27; --text: #f1ece6; --muted: #a59a8f; --line: #3a3530;
  }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); }
#app { max-width: 480px; margin: 0 auto; min-height: 100vh; padding-bottom: 80px; }
h1, h2, h3 { margin: 0 0 12px; }
h2 { font-size: 1.3rem; }
h3 { font-size: 1rem; margin-top: 8px; }
p { margin: 6px 0; line-height: 1.55; }
label { display: block; font-size: .85rem; color: var(--muted); margin: 12px 0 4px; }

.topbar {
  position: sticky; top: 0; z-index: 5; display: flex; align-items: center; gap: 10px;
  padding: 10px 16px; background: var(--bg); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 800; color: var(--primary); font-size: 1.1rem; }
.mode-switch { margin-left: auto; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 50%; border: 0; background: var(--primary); color: var(--primary-ink);
  font-weight: 700; cursor: pointer; font-size: .8rem;
}
main { padding: 16px; }

.seg { display: inline-flex; background: var(--subtle); border-radius: 999px; padding: 3px; gap: 2px; }
.seg.full { display: flex; width: 100%; margin-bottom: 12px; }
.seg button, .seg .radio {
  flex: 1; border: 0; background: transparent; padding: 7px 14px; border-radius: 999px; cursor: pointer;
  color: var(--muted); font: inherit; font-size: .9rem; text-align: center; margin: 0;
}
.seg button.on, .seg .radio:has(input:checked) { background: var(--surface); color: var(--text); font-weight: 600; box-shadow: 0 1px 3px rgb(0 0 0 / .1); }
.seg .radio input { display: none; }

.card {
  display: block; width: 100%; text-align: left; font: inherit; color: inherit;
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; margin-bottom: 12px;
}
.card.subtle { background: var(--subtle); border-color: transparent; }
.card.center { text-align: center; }
.store-card { display: flex; gap: 12px; align-items: center; cursor: pointer; }
.store-card:hover { border-color: var(--primary); }
.title { font-weight: 700; }
.title.big { font-size: 1.3rem; }
.hero { background: linear-gradient(135deg, var(--primary), #f08a4b); color: #fff; border: 0; }
.hero .muted, .hero .small { color: rgb(255 255 255 / .85); }
.hero-points { font-size: 1.1rem; margin-top: 10px; }
.hero-points b { font-size: 2.6rem; }
.points { text-align: right; min-width: 56px; }
.points b { font-size: 1.8rem; display: block; line-height: 1; }
.points span { font-size: .75rem; opacity: .8; }

.input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--line); border-radius: 10px; font: inherit;
  background: var(--surface); color: var(--text);
}
.input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.big-input { font-size: 1.5rem; letter-spacing: .05em; padding: 12px; }
.narrow { width: 72px; flex: none; text-align: center; }
textarea.input { resize: vertical; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px; border-radius: 10px; border: 1px solid var(--line); background: var(--surface); color: var(--text);
  font: inherit; cursor: pointer; white-space: nowrap;
}
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); font-weight: 600; }
.btn.danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.block { width: 100%; margin-top: 12px; }
.btn.small { padding: 6px 12px; font-size: .85rem; }
.btn.tiny { padding: 2px 8px; font-size: .75rem; }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.link { background: none; border: 0; color: var(--primary); cursor: pointer; font: inherit; padding: 6px 0; margin-bottom: 8px; }

.row { display: flex; gap: 8px; align-items: center; }
.row.end { justify-content: flex-end; margin-top: 16px; }
.row.wrap { flex-wrap: wrap; margin-top: 8px; }
.grow { flex: 1; min-width: 0; }
.rule-row, .reward-row { margin: 8px 0; }

.muted { color: var(--muted); }
.small { font-size: .85rem; }
.hint { font-size: .8rem; color: var(--muted); }
.mono { font-family: ui-monospace, Consolas, monospace; }
.block { display: block; }
.left { text-align: left; }
.pre { white-space: pre-wrap; }
.ok-text { color: var(--ok); }
.warn-text { color: var(--danger); }

.badge { display: inline-block; font-size: .7rem; padding: 2px 8px; border-radius: 999px; background: var(--primary); color: #fff; font-weight: 500; }
.badge.gray { background: var(--subtle); color: var(--muted); }
.chips { display: flex; flex-wrap: wrap; gap: 4px; margin-top: 6px; }
.chip { font-size: .75rem; background: var(--subtle); padding: 2px 8px; border-radius: 999px; }
.progress { height: 6px; background: var(--subtle); border-radius: 3px; overflow: hidden; margin: 8px 0 4px; }
.progress span { display: block; height: 100%; background: var(--primary); }

.list { list-style: none; padding: 0; margin: 0; }
.list li { display: flex; align-items: center; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.list li:last-child { border-bottom: 0; }
.list.pick li { padding: 0; }
.list.pick button {
  display: flex; align-items: center; gap: 8px; width: 100%; padding: 12px 4px; background: none; border: 0;
  color: inherit; font: inherit; text-align: left; cursor: pointer;
}
.list.pick button:hover:not(:disabled) { background: var(--subtle); }

.tx-list { list-style: none; padding: 0; margin: 0; }
.tx-list li { display: flex; align-items: center; gap: 8px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.tx-list li.voided .grow, .tx-list li.voided .pts { text-decoration: line-through; opacity: .5; }
.pts { font-weight: 700; font-variant-numeric: tabular-nums; }
.pts.plus { color: var(--ok); }
.pts.minus { color: var(--danger); }
.tag { font-size: .7rem; padding: 1px 6px; border-radius: 4px; background: var(--subtle); }
.tag.earn { background: #dff1e6; color: #22683f; }
.tag.redeem { background: #fde6df; color: #a8412a; }
.tag.void { background: #e8e8e8; color: #555; }

.preview { margin-top: 8px; font-size: 1.1rem; font-weight: 600; color: var(--primary); }
.stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px; margin-bottom: 8px; }
.stats div { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 12px; }
.stats b { display: block; font-size: 1.5rem; }
.stats span { font-size: .75rem; color: var(--muted); }

.qr-box { width: 240px; max-width: 100%; margin: 0 auto 8px; aspect-ratio: 1; display: grid; place-items: center; background: #fff; border-radius: 12px; }
.qr-box img { width: 100%; image-rendering: pixelated; }
.reader { width: 100%; border-radius: 10px; overflow: hidden; }
details { margin-top: 12px; }
summary { cursor: pointer; color: var(--muted); }

.plan .price { font-size: 1.8rem; font-weight: 800; margin: 6px 0; }
.plan .price span { font-size: .9rem; color: var(--muted); font-weight: 400; }
.plan.warn { border-color: var(--danger); }
.plan ul { padding-left: 20px; }

.empty { text-align: center; padding: 40px 16px; }
.loading { text-align: center; color: var(--muted); padding: 40px; }

.bottomnav {
  position: fixed; bottom: 0; left: 50%; transform: translateX(-50%); width: 100%; max-width: 480px;
  display: flex; background: var(--surface); border-top: 1px solid var(--line); padding-bottom: env(safe-area-inset-bottom);
}
.bottomnav:empty { display: none; }
.bottomnav button {
  flex: 1; border: 0; background: none; padding: 8px 0 10px; color: var(--muted); font: inherit; font-size: .75rem; cursor: pointer;
}
.bottomnav button.on { color: var(--primary); font-weight: 600; }
.ni { display: block; font-size: 1.2rem; }

.login { padding: 40px 16px; text-align: center; }
.login .card { text-align: left; }
.logo { font-size: 3rem; color: var(--primary); line-height: 1; }

#toasts { position: fixed; top: 64px; left: 50%; transform: translateX(-50%); z-index: 20; display: grid; gap: 8px; width: min(92vw, 420px); }
.toast { padding: 12px 16px; border-radius: 10px; background: var(--ok); color: #fff; box-shadow: 0 4px 12px rgb(0 0 0 / .15); animation: pop .2s; }
.toast.err { background: var(--danger); }
@keyframes pop { from { transform: translateY(-8px); opacity: 0; } }

dialog { border: 0; border-radius: var(--radius); padding: 0; width: min(92vw, 420px); background: var(--surface); color: var(--text); }
dialog::backdrop { background: rgb(0 0 0 / .4); }
.dialog-body { padding: 20px; }

.map-actions { margin-bottom: 12px; }
.map-actions .btn { text-decoration: none; }
.link-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip-link {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 999px;
  background: var(--subtle); color: var(--text); text-decoration: none; font-size: .9rem;
}
.chip-link span { font-weight: 700; color: var(--primary); }

/* 店家自己寫的文字：左側色條＋標籤，與系統提示明顯區隔 */
.store-note { margin-top: 12px; padding: 10px 12px; border-left: 3px solid var(--primary); background: var(--subtle); border-radius: 0 8px 8px 0; }
.store-note-label { font-size: .75rem; color: var(--muted); margin-bottom: 2px; }
.store-note p { margin: 0; }
section.card h3 { margin-top: 0; }

.mine-bar { display: flex; align-items: center; gap: 12px; border-color: var(--primary); }
.notice { padding: 10px 12px; margin: -4px 0 12px; border-radius: 10px; background: var(--subtle); font-size: .85rem; }

/* 帳號頁 */
.profile { display: flex; align-items: center; gap: 14px; }
.avatar-lg {
  width: 56px; height: 56px; border-radius: 50%; flex: none; display: grid; place-items: center;
  background: var(--primary); color: var(--primary-ink); font-size: 1.4rem; font-weight: 700;
}
/* 登出和其他按鈕拉開距離，避免誤觸 */
.logout-zone { margin: 36px 0 24px; padding-top: 20px; border-top: 1px solid var(--line); }
.logout-btn { color: var(--danger); border-color: var(--danger); background: transparent; }

/* 店家頭像（logo 或店名第一個字） */
.store-avatar {
  width: 44px; height: 44px; flex: none; border-radius: 10px; object-fit: cover;
  display: grid; place-items: center; background: var(--subtle); color: var(--primary);
  font-weight: 700; font-size: 1.1rem;
}
.store-avatar.lg { width: 64px; height: 64px; border-radius: 14px; font-size: 1.6rem; }
.hero .store-avatar { background: rgb(255 255 255 / .9); }
.logo-row { align-items: center; gap: 14px; margin-top: 8px; }
.file-btn { cursor: pointer; margin: 0; }
.tag.transfer_in, .tag.transfer_out { background: #e3ebf7; color: #2c5282; }

/* 到期／寬限期提醒 */
.badge.warn { background: #f3c14b; color: #3b2a00; }
.warn-notice { background: #fdf1d6; color: #5a4100; }
@media (prefers-color-scheme: dark) { .warn-notice { background: #3d3217; color: #f3dfae; } }
/* 刪除帳號 */
.delete-link { display: block; margin: 16px auto 0; color: var(--muted); }
label.check { display: flex; align-items: center; gap: 8px; color: var(--text); font-size: .9rem; margin: 16px 0 4px; }

/* 條款頁 */
.doc { max-width: 720px; margin: 0 auto; padding: 16px 16px 48px; line-height: 1.75; }
.doc h1 { font-size: 1.4rem; margin-top: 12px; }
.doc h2 { font-size: 1.05rem; margin: 24px 0 8px; }
.doc ol, .doc ul { padding-left: 22px; }
.doc li { margin: 4px 0; }
.doc a, label.check a { color: var(--primary); }
.center-text { text-align: center; }
.ledger-tools { margin: 0 0 8px; }