:root {
  --desk: #E4E8EE;        /* 桌面：冷灰藍，讓感熱紙浮出來 */
  --paper: #FCFCF8;       /* 感熱紙 */
  --ink: #25304A;         /* 收據印字的藍黑墨 */
  --ink-soft: #6A7387;
  --rule: #C9CED8;
  --stamp: #D23A2E;       /* 發票章紅 */
  --stamp-wash: rgba(210, 58, 46, .08);
  --bar: #9AA3B5;
  --panel: #F4F6F9;
  --focus: #2B6CB0;
  --text: "Huninn", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  --dots: "DotGothic16", "Huninn", ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --desk: #151A23; --paper: #1E2431; --ink: #E7EAF1; --ink-soft: #A2AABB; --rule: #39414F;
    --stamp: #FF6A5C; --stamp-wash: rgba(255, 106, 92, .12); --bar: #5C6577; --panel: #1A202B;
    --focus: #7FB2F0; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --desk: #151A23; --paper: #1E2431; --ink: #E7EAF1; --ink-soft: #A2AABB; --rule: #39414F;
  --stamp: #FF6A5C; --stamp-wash: rgba(255, 106, 92, .12); --bar: #5C6577; --panel: #1A202B;
  --focus: #7FB2F0; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--desk);
  color: var(--ink);
  font: 16px/1.6 var(--text);
}
button, input { font: inherit; color: inherit; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 6px; }
[hidden] { display: none !important; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---- 頂欄 ---- */
.bar {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 12px;
  max-width: 1120px;
  margin: 0 auto;
  padding: 20px 24px 8px;
}
.brand { display: flex; align-items: center; gap: 8px; color: inherit; text-decoration: none; font-size: 22px; }
.month-nav { display: flex; align-items: center; gap: 4px; }
.month-nav h1 { margin: 0; min-width: 9.5em; text-align: center; font-size: 20px; font-weight: 400; letter-spacing: .04em; }
.icon-btn {
  width: 36px; height: 36px; border: 0; border-radius: 50%;
  background: transparent; font-size: 24px; line-height: 1; cursor: pointer;
}
.icon-btn:hover:not(:disabled) { background: var(--panel); }
.icon-btn:disabled { opacity: .3; cursor: default; }
.actions { display: flex; justify-content: flex-end; align-items: center; gap: 10px; }
.sync-btn {
  border: 2px solid var(--stamp); background: transparent; color: var(--stamp);
  padding: 6px 16px; border-radius: 999px; cursor: pointer; white-space: nowrap;
}
.sync-btn:hover:not(:disabled) { background: var(--stamp-wash); }
.sync-btn:disabled { opacity: .55; cursor: progress; }
.demo-badge { font-size: 14px; color: var(--ink-soft); border: 1px dashed var(--rule); padding: 2px 10px; border-radius: 999px; }
.sync-status { max-width: 1120px; margin: 0 auto; padding: 0 24px; min-height: 1.6em; text-align: right; font-size: 14px; color: var(--ink-soft); }
.sync-status.error { color: var(--stamp); }

/* ---- 版面 ---- */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 440px) minmax(0, 1fr);
  gap: 40px;
  max-width: 1120px;
  margin: 8px auto 0;
  padding: 0 24px 40px;
  align-items: start;
}

/* ---- 收據 ---- */
.receipt {
  position: relative;
  background: var(--paper);
  padding: 28px 28px 40px;
  box-shadow: 0 1px 0 var(--rule), 0 18px 40px -24px rgba(20, 30, 50, .35);
  /* 撕下來的鋸齒底邊 */
  --tooth: 10px;
  -webkit-mask: conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) 50% / calc(2 * var(--tooth)) 100%;
          mask: conic-gradient(from -45deg at bottom, #0000, #000 1deg 89deg, #0000 90deg) 50% / calc(2 * var(--tooth)) 100%;
}
.receipt-head { text-align: center; border-bottom: 2px dashed var(--rule); padding-bottom: 18px; }
.receipt-kicker { margin: 0; font-size: 14px; color: var(--ink-soft); letter-spacing: .2em; }
.receipt-month { margin: 2px 0 14px; font-size: 18px; font-weight: 400; }
.total { position: relative; display: flex; flex-direction: column; align-items: center; }
.total-label { font-size: 14px; color: var(--ink-soft); }
.total-amount { font-family: var(--dots); font-size: clamp(44px, 9vw, 60px); line-height: 1.1; letter-spacing: .02em; }
.total-sub { margin: 10px 0 0; font-size: 15px; color: var(--ink-soft); }

.stamp {
  position: absolute;
  right: -6px; top: -14px;
  padding: 4px 10px;
  border: 3px solid var(--stamp);
  border-radius: 8px;
  color: var(--stamp);
  font-size: 20px;
  letter-spacing: .12em;
  transform: rotate(-12deg);
  opacity: .82;
  mix-blend-mode: multiply;
  /* 印泥不均勻的質感 */
  -webkit-mask: radial-gradient(circle at 30% 40%, #000 55%, #0009 75%, #000 90%);
          mask: radial-gradient(circle at 30% 40%, #000 55%, #0009 75%, #000 90%);
}
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .stamp { mix-blend-mode: normal; } }
.stamp.press { animation: press .45s cubic-bezier(.2, .9, .3, 1.3) both; }
@keyframes press {
  0% { transform: rotate(-12deg) scale(1.9); opacity: 0; }
  60% { transform: rotate(-12deg) scale(.94); opacity: .9; }
  100% { transform: rotate(-12deg) scale(1); opacity: .82; }
}
@media (prefers-reduced-motion: reduce) { .stamp.press { animation: none; } }

.search { display: block; margin: 18px 0 6px; }
.search input {
  width: 100%; padding: 8px 2px; border: 0; border-bottom: 1px solid var(--rule);
  background: transparent; outline-offset: 4px;
}
.search input::placeholder { color: var(--ink-soft); opacity: .8; }

.invoice-list { list-style: none; margin: 0; padding: 0; }
.inv + .inv { border-top: 1px dotted var(--rule); }
.inv-btn {
  display: grid; grid-template-columns: 4.6em 1fr auto; gap: 10px; align-items: baseline;
  width: 100%; padding: 10px 0; border: 0; background: none; text-align: left; cursor: pointer;
}
.inv-btn:hover .inv-shop { text-decoration: underline; text-decoration-color: var(--rule); text-underline-offset: 4px; }
.inv-date { font-family: var(--dots); font-size: 14px; color: var(--ink-soft); }
.inv-shop { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.inv-amount { font-family: var(--dots); font-size: 17px; }
.inv-items { list-style: none; margin: 0 0 10px; padding: 8px 0 4px 4.6em; font-size: 14px; color: var(--ink-soft); }
.inv-items li { display: grid; grid-template-columns: 1fr auto auto; gap: 12px; padding: 2px 0; }
.inv-items .qty { font-family: var(--dots); }
.inv-items .amt { font-family: var(--dots); color: var(--ink); min-width: 4em; text-align: right; }
.inv-items .neg { color: var(--stamp); }
.inv-items .meta { grid-template-columns: 1fr; font-size: 12px; padding-top: 6px; }
.empty { margin: 24px 0 0; text-align: center; color: var(--ink-soft); }

/* ---- 右欄 ---- */
.side { display: grid; gap: 32px; padding-top: 8px; }
.panel h2 { margin: 0 0 14px; font-size: 18px; font-weight: 400; }

.trend { display: flex; align-items: flex-end; gap: 8px; height: 190px; padding-top: 26px; }
.trend-col {
  flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: flex-end; gap: 6px;
  height: 100%; border: 0; background: none; padding: 0; cursor: pointer; position: relative;
}
.trend-track { flex: 1; width: 100%; display: flex; align-items: flex-end; justify-content: center; }
.trend-bar { width: 100%; max-width: 44px; border-radius: 6px 6px 2px 2px; background: var(--bar); min-height: 3px; transition: background .2s; }
.trend-col:hover .trend-bar { background: var(--ink-soft); }
.trend-col[aria-pressed="true"] .trend-bar { background: var(--stamp); }
.trend-bar { position: relative; }
.trend-val { position: absolute; bottom: calc(100% + 4px); left: 50%; transform: translateX(-50%); font-family: var(--dots); font-size: 13px; white-space: nowrap; visibility: hidden; }
.trend-col[aria-pressed="true"] .trend-val, .trend-col:hover .trend-val { visibility: visible; }
.trend-month { font-size: 13px; color: var(--ink-soft); }
.trend-col[aria-pressed="true"] .trend-month { color: var(--ink); }

.shops { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.shop { display: grid; grid-template-columns: 1fr auto; gap: 2px 12px; }
.shop-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.shop-name small { color: var(--ink-soft); font-size: 13px; margin-left: 6px; }
.shop-amt { font-family: var(--dots); }
.shop-track { display: block; grid-column: 1 / -1; height: 6px; background: var(--panel); border-radius: 3px; overflow: hidden; }
.shop-fill { display: block; height: 100%; background: var(--ink); border-radius: 3px; opacity: .75; }
.shop:first-child .shop-fill { background: var(--stamp); opacity: 1; }

.acai { display: grid; grid-template-columns: 52px 1fr; gap: 14px; align-items: start; background: var(--panel); border-radius: 16px; padding: 16px 18px; }
.acai h2 { margin: 0 0 2px; font-size: 16px; }
.acai p { margin: 0; font-size: 15px; color: var(--ink-soft); }
.acai-avatar {
  width: 52px; height: 52px; border-radius: 50%; display: grid; place-items: center;
  background: var(--paper); border: 2px solid var(--stamp); color: var(--stamp); font-size: 24px;
}

.foot { display: flex; justify-content: space-between; max-width: 1120px; margin: 0 auto; padding: 0 24px 28px; font-size: 13px; color: var(--ink-soft); }

/* ---- 窄螢幕 ---- */
@media (max-width: 860px) {
  .layout { grid-template-columns: minmax(0, 1fr); gap: 28px; padding: 0 16px 32px; }
  .bar { grid-template-columns: 1fr auto; padding: 16px 16px 4px; }
  .month-nav { grid-column: 1 / -1; grid-row: 2; justify-content: center; }
  .sync-status { padding: 0 16px; text-align: center; }
  .receipt { padding: 22px 18px 36px; }
  .foot { padding: 0 16px 24px; }
}

/* ---- 線上展示提示 ---- */
.live-banner {
  max-width: 1120px; margin: 4px auto 0; padding: 0 24px;
  font-size: 15px; color: var(--ink-soft);
}
.live-banner a, .foot a, .login a { color: inherit; text-decoration-color: var(--stamp); text-underline-offset: 3px; }
.foot a { text-decoration: none; }
.link-btn { border: 0; background: none; padding: 0 0 0 6px; color: var(--ink-soft); text-decoration: underline; cursor: pointer; font-size: inherit; }

/* ---- 連結手機條碼 ---- */
.login {
  width: min(440px, calc(100vw - 32px));
  padding: 28px 28px 24px;
  border: 0;
  border-radius: 16px;
  background: var(--paper);
  color: var(--ink);
  box-shadow: 0 30px 80px -30px rgba(10, 20, 40, .5);
}
.login::backdrop { background: rgba(20, 26, 38, .45); }
.login h2 { margin: 0 0 6px; font-size: 20px; font-weight: 400; }
.login-lead { margin: 0 0 20px; font-size: 15px; color: var(--ink-soft); }
.field { display: grid; gap: 4px; margin-bottom: 16px; }
.field > span { font-size: 15px; }
.field input {
  width: 100%; padding: 10px 12px; border: 1px solid var(--rule); border-radius: 10px;
  background: var(--desk); font-size: 18px;
}
.field input:focus-visible { outline-offset: 0; border-color: var(--focus); }
#login-phone { font-family: var(--dots); letter-spacing: .08em; }
.field small { font-size: 13px; color: var(--ink-soft); line-height: 1.5; }
.check { display: flex; gap: 8px; align-items: center; font-size: 15px; margin: 4px 0 14px; cursor: pointer; }
.check input { width: 18px; height: 18px; accent-color: var(--stamp); }
.login-error { margin: 0 0 12px; padding: 8px 12px; border-radius: 8px; background: var(--stamp-wash); color: var(--stamp); font-size: 14px; }
.login-actions { display: flex; justify-content: flex-end; gap: 10px; }
.ghost-btn { border: 0; background: none; padding: 6px 14px; color: var(--ink-soft); cursor: pointer; border-radius: 999px; }
.ghost-btn:hover { background: var(--panel); }
.sync-btn.primary { background: var(--stamp); color: #fff; }
.sync-btn.primary:hover { background: var(--stamp); filter: brightness(1.08); }
@media (max-width: 860px) { .live-banner { padding: 0 16px; text-align: center; } }

/* ---- 分類 ---- */
.cats .shop { cursor: pointer; border: 0; background: none; padding: 0; text-align: left; width: 100%; color: inherit; }
.cats li { list-style: none; }
.cats .shop[aria-pressed="true"] .shop-name { text-decoration: underline; text-decoration-color: var(--stamp); text-underline-offset: 4px; }
.cats .shop-amt small { color: var(--ink-soft); font-family: var(--text); font-size: 13px; margin-right: 8px; }
.filter { display: flex; align-items: baseline; gap: 6px; margin: 16px 0 0; font-size: 15px; color: var(--ink-soft); }
.filter strong { color: var(--stamp); font-weight: 400; }
.tag {
  justify-self: start; border: 1px solid var(--rule); border-radius: 999px; padding: 0 8px;
  font-size: 12px; line-height: 20px; color: var(--ink-soft); background: transparent; cursor: pointer; white-space: nowrap;
}
.tag:hover { border-color: var(--ink-soft); }
.tag.unsure { border-style: dashed; }
.tag.unsure::after { content: "？"; }
.tag.mine { border-color: var(--ink); color: var(--ink); }
.tag-select { font-size: 13px; border: 1px solid var(--focus); border-radius: 8px; padding: 1px 4px; background: var(--paper); }
.inv-items li { align-items: center; }
.inv-items .desc { display: flex; flex-wrap: wrap; gap: 4px 8px; align-items: center; }
.acai-meta { margin-top: 6px !important; font-size: 13px !important; }
.sync-btn.small { margin-top: 10px; padding: 3px 14px; font-size: 14px; }
.cats li:not(:first-child) .shop-fill { background: var(--ink); opacity: .75; }

/* ---- 幫阿財確認 ---- */
.acai-actions { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.acai-actions .sync-btn.small { margin-top: 0; }
.review { width: min(520px, calc(100vw - 32px)); }
.review-card { border: 2px dashed var(--rule); border-radius: 12px; padding: 14px 16px; margin-bottom: 16px; }
.review-item { margin: 0; font-size: 22px; line-height: 1.35; word-break: break-word; }
.review-meta { margin: 4px 0 0; font-size: 14px; color: var(--ink-soft); }
.review-guess { margin: 8px 0 0; font-size: 15px; }
.review-guess strong { color: var(--stamp); font-weight: 400; }
.review-choices { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }
.choice {
  border: 1px solid var(--rule); border-radius: 999px; padding: 4px 12px; background: var(--paper);
  font-size: 15px; cursor: pointer;
}
.choice:hover { border-color: var(--ink); }
.choice.guess { border: 2px solid var(--stamp); color: var(--stamp); }
.review-note { min-height: 1.5em; margin: 0 0 8px; font-size: 14px; color: var(--ink-soft); }