:root {
  --paper: #f7f6f1;
  --card: #ffffff;
  --ink: #1f2a2e;
  --muted: #5d6a6e;
  --line: #d9dcd6;
  --accent: #c2410c;
  --accent-soft: #fbe6d9;
  --leaf: #2f6b4f;
  --leaf-soft: #e1efe7;
  --danger: #b42318;
  --danger-soft: #fbe4e1;
  --soft: #eef0ec;
  --f-body: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", system-ui, sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #171c1e; --card: #20272a; --ink: #e9ece8; --muted: #a3aeb0; --line: #343e41;
    --accent: #f08a54; --accent-soft: #3a261c; --leaf: #7cc49c; --leaf-soft: #1f3329;
    --danger: #f2877b; --danger-soft: #3b2220; --soft: #2a3235;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #171c1e; --card: #20272a; --ink: #e9ece8; --muted: #a3aeb0; --line: #343e41;
  --accent: #f08a54; --accent-soft: #3a261c; --leaf: #7cc49c; --leaf-soft: #1f3329;
  --danger: #f2877b; --danger-soft: #3b2220; --soft: #2a3235;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0; background: var(--paper); color: var(--ink);
  font-family: var(--f-body); font-size: 16px; line-height: 1.6;
}
#app {
  max-width: 560px; margin: 0 auto;
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
  padding-block: 16px 120px;
  display: flex; flex-direction: column; gap: 16px;
}
h1, h2, h3, p { margin: 0; }
h1 { font-size: 24px; line-height: 1.3; font-weight: 600; text-wrap: balance; }
h2 { font-size: 14px; color: var(--muted); font-weight: 500; margin-top: 8px; }
b, strong { font-weight: 600; }
.num { font-variant-numeric: tabular-nums; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.loading { color: var(--muted); padding: 40px 0; text-align: center; }

/* 卡片與排版 */
.card { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 16px; display: flex; flex-direction: column; gap: 12px; min-width: 0; }
.stack { display: flex; flex-direction: column; gap: 12px; }
.row { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-width: 0; }
.row > .grow { flex: 1; min-width: 0; }
.wrap-row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.wrap-row .push { margin-left: auto; }
.actions { display: flex; flex-direction: column; gap: 8px; }
hr.dash { border: 0; border-top: 1px dashed var(--line); margin: 0; }
.head { display: flex; flex-direction: column; gap: 4px; }
.meta { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; color: var(--muted); }

/* 標籤 */
.pill { display: inline-flex; align-items: center; font-size: 12px; font-weight: 500; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.pill.open { background: var(--leaf-soft); color: var(--leaf); }
.pill.closed { background: var(--soft); color: var(--muted); }
.pill.warn { background: var(--soft); color: var(--ink); }
/* 品項代號：全站唯一用重點色當底的元件，團員在群組裡會直接講「我要 A 兩個」 */
.code { display: inline-grid; place-items: center; width: 24px; height: 24px; flex: none; border-radius: 6px; background: var(--accent-soft); color: var(--accent); font-weight: 600; font-size: 13px; }

/* 按鈕 */
button { font: inherit; color: inherit; cursor: pointer; }
.btn { border: 0; border-radius: 10px; padding: 8px 16px; font-weight: 600; background: var(--ink); color: var(--paper); min-height: 44px; }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); font-weight: 500; }
.btn.danger { background: var(--danger); color: #fff; }
.btn.ghost.danger { background: transparent; color: var(--danger); }
.btn.small { padding: 4px 12px; min-height: 36px; font-size: 14px; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .45; cursor: default; }
.link { background: none; border: 0; padding: 0; color: var(--ink); font-weight: 500; text-decoration: underline; text-decoration-color: var(--muted); text-underline-offset: 3px; }
.back { align-self: flex-start; background: none; border: 0; padding: 0 8px 0 0; min-height: 44px; margin-block: -8px; display: inline-flex; align-items: center; color: var(--muted); font-size: 15px; }
:focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; }

/* 表單 */
label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; font-weight: 500; }
label .hint { font-weight: 400; color: var(--muted); font-size: 12px; }
input, textarea, select {
  font: inherit; font-size: 16px; color: var(--ink); background: var(--card);
  border: 1px solid var(--line); border-radius: 8px; padding: 8px 12px; width: 100%; min-width: 0;
}
input:disabled, textarea:disabled { background: var(--soft); color: var(--muted); border-style: dashed; opacity: 1; -webkit-text-fill-color: var(--muted); }
textarea { resize: vertical; min-height: 60px; }
.item-row { display: grid; grid-template-columns: 24px 1fr 76px 64px 32px; gap: 4px; align-items: center; }
.item-row input { padding: 8px; }
.item-head { font-size: 12px; color: var(--muted); }
.icon-btn { width: 32px; height: 32px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); display: grid; place-items: center; padding: 0; }
.icon-btn:disabled { opacity: .3; cursor: default; }
.seg { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: var(--soft); padding: 4px; border-radius: 12px; }
.seg button { border: 0; background: transparent; border-radius: 8px; padding: 8px 4px; font-size: 14px; color: var(--muted); }
.seg button[aria-pressed="true"] { background: var(--card); color: var(--ink); font-weight: 600; box-shadow: 0 1px 2px rgba(0,0,0,.08); }
.two { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

/* 下單 */
.order-item { display: flex; align-items: center; gap: 12px; }
.order-item .grow { flex: 1; min-width: 0; }
.stepper { display: flex; align-items: center; gap: 4px; flex: none; }
.stepper button { width: 36px; height: 36px; border-radius: 50%; border: 1px solid var(--line); background: var(--card); font-size: 18px; line-height: 1; padding: 0; }
.stepper button:disabled { opacity: .35; cursor: default; }
.stepper .qty { width: 32px; text-align: center; font-weight: 600; font-size: 17px; }
.progress { height: 4px; border-radius: 2px; background: var(--soft); overflow: hidden; }
.progress > span { display: block; height: 100%; background: var(--leaf); }

/* 底部固定列 */
.bottom-bar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 5;
  background: var(--card); border-top: 1px solid var(--line);
  padding-top: 12px;
  padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
  padding-left: max(16px, env(safe-area-inset-left, 0px));
  padding-right: max(16px, env(safe-area-inset-right, 0px));
}
.bottom-bar .inner { max-width: 528px; margin: 0 auto; display: flex; align-items: center; gap: 12px; }
.bottom-bar .total { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.bottom-bar .total b { font-size: 22px; }

/* 統計 */
.tabs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4px; background: var(--soft); padding: 4px; border-radius: 12px; position: sticky; top: env(safe-area-inset-top, 0px); z-index: 3; }
.tabs button { border: 0; background: transparent; padding: 8px; border-radius: 8px; color: var(--muted); }
.tabs button[aria-selected="true"] { background: var(--card); color: var(--ink); font-weight: 600; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 12px; display: flex; flex-direction: column; min-width: 0; }
.stat span { font-size: 12px; color: var(--muted); }
.stat b { font-size: 18px; }
.stat b.due { color: var(--accent); }
table.list { width: 100%; border-collapse: collapse; font-size: 15px; }
table.list th { text-align: left; font-size: 12px; color: var(--muted); font-weight: 500; padding: 4px 0; }
table.list td { padding: 8px 0; border-top: 1px solid var(--line); }
table.list .r { text-align: right; }
table.list tfoot td { font-weight: 600; }
.toggle { display: inline-flex; align-items: center; gap: 8px; border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 4px 12px 4px 8px; font-size: 14px; min-height: 36px; flex: none; }
.toggle .dot { width: 20px; height: 20px; border-radius: 50%; border: 2px solid var(--line); display: grid; place-items: center; font-size: 12px; }
.toggle[aria-pressed="true"] { border-color: var(--leaf); color: var(--leaf); background: var(--leaf-soft); }
.toggle[aria-pressed="true"] .dot { background: var(--leaf); border-color: var(--leaf); color: var(--card); }
.person { display: flex; flex-direction: column; gap: 4px; }
.person .lines { font-size: 14px; color: var(--muted); }
.banner { border-radius: 12px; padding: 12px 16px; font-size: 14px; display: flex; flex-direction: column; gap: 8px; }
.banner.ok { background: var(--leaf-soft); color: var(--leaf); }
.banner.warn { background: var(--danger-soft); color: var(--danger); }
.banner.info { background: var(--soft); color: var(--ink); }
.confirm { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.pay-info { white-space: pre-line; overflow-wrap: anywhere; background: var(--soft); border-radius: 8px; padding: 12px; font-size: 15px; }
.method-pick { padding: 4px 0; }
.lock-note { margin: 0 0 0 28px; }
.err-text { color: var(--danger); }
.log summary { cursor: pointer; font-weight: 500; }
.log-row { display: flex; gap: 12px; align-items: baseline; }
.log-row > .grow { flex: 1; min-width: 0; overflow-wrap: anywhere; }

/* 示範列與提示 */
.demo-bar { background: var(--soft); color: var(--muted); border-radius: 12px; padding: 8px 12px; font-size: 13px; display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.demo-bar select { width: auto; padding: 4px 8px; font-size: 14px; }
.demo-bar .link { font-size: 13px; color: var(--muted); }
.toast {
  position: fixed; left: 50%; transform: translateX(-50%); z-index: 20;
  bottom: calc(92px + env(safe-area-inset-bottom, 0px));
  background: var(--ink); color: var(--paper); padding: 12px 16px; border-radius: 12px;
  font-size: 14px; max-width: calc(100% - 32px); box-shadow: 0 4px 16px rgba(0,0,0,.2);
}
.toast.err { background: var(--danger); color: #fff; }
.empty { text-align: center; color: var(--muted); padding: 20px 8px; font-size: 14px; }

@media (max-width: 380px) {
  .item-row { grid-template-columns: 22px 1fr 68px 56px 30px; }
  .stats b { font-size: 16px; }
}
@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }

/* 規格：開團頁 */
.item-block { display: flex; flex-direction: column; gap: 8px; padding-bottom: 12px; border-bottom: 1px dashed var(--line); }
.item-block:last-of-type { border-bottom: 0; padding-bottom: 0; }
.spec-add { align-self: flex-start; margin-left: 28px; font-size: 13px; }
.spec { margin-left: 28px; display: flex; flex-direction: column; gap: 8px; background: var(--soft); border-radius: 8px; padding: 12px; min-width: 0; }
.spec .link { align-self: flex-start; font-size: 13px; }
.spec-dim { display: grid; grid-template-columns: 84px 1fr 32px; gap: 4px; align-items: center; }
.spec-dim input, .spec-list input { padding: 8px; font-size: 15px; }
.spec-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.spec-row { flex-direction: row; align-items: center; gap: 8px; font-weight: 400; font-size: 13px; }
.spec-row span { flex: 1; min-width: 0; overflow-wrap: anywhere; }
.spec-row input { width: 64px; flex: none; }

/* 匯入勾選清單 */
.pick-list { gap: 8px; }
.pick-row { flex-direction: row; align-items: center; gap: 12px; font-weight: 400; font-size: 15px; padding: 8px 0; border-top: 1px solid var(--line); }
.pick-row input { width: 20px; height: 20px; flex: none; accent-color: var(--ink); }
.pick-row .grow { flex: 1; min-width: 0; }

/* 規格：下單頁 */
.variant-box { margin-left: 36px; display: flex; flex-direction: column; gap: 8px; }
.chips { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.chip-label { width: 100%; }
.chip { border: 1px solid var(--line); background: var(--card); border-radius: 999px; padding: 4px 12px; font-size: 14px; min-height: 36px; }
.chip[aria-pressed="true"] { border-color: var(--ink); background: var(--ink); color: var(--paper); font-weight: 600; }
.chip.none { color: var(--muted); text-decoration: line-through; }
.variant-cur { background: var(--soft); border-radius: 12px; padding: 8px 8px 8px 12px; }
.variant-picked { display: flex; flex-direction: column; gap: 4px; }

/* 規格：統計頁 */
table.list tr.sub td { border-top: 0; padding: 2px 0; font-size: 14px; color: var(--muted); }
table.list tr.sub td:first-child { padding-left: 32px; }

@media (max-width: 380px) {
  .spec, .spec-add, .variant-box, .lock-note { margin-left: 0; }
  .spec-dim { grid-template-columns: 70px 1fr 30px; }
}