/* 報銷網站：手機優先，淺色／深色跟著系統 */
:root {
  --bg: #f2f3f5;
  --card: #ffffff;
  --text: #15181c;
  --muted: #69717c;
  --line: #e2e5e9;
  --field: #f7f8f9;
  --accent: #0e7c66;
  --accent-ink: #ffffff;
  --accent-soft: #e2f3ee;
  --danger: #b42318;
  --ok-bg: #e4f5eb;
  --ok-ink: #0f5a38;
  --err-bg: #fdebe8;
  --err-ink: #8c1d12;
  --warn-bg: #fff3dc;
  --warn-ink: #8a5300;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .07);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1113;
    --card: #1a1d20;
    --text: #e8eaed;
    --muted: #9aa1aa;
    --line: #2b2f34;
    --field: #22262a;
    --accent: #3cc39d;
    --accent-ink: #06201a;
    --accent-soft: #16302a;
    --danger: #ff8070;
    --ok-bg: #13301f;
    --ok-ink: #8fe0b2;
    --err-bg: #3b1b17;
    --err-ink: #ffb3a7;
    --warn-bg: #3a2c10;
    --warn-ink: #f3c878;
    --shadow: none;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 -apple-system, BlinkMacSystemFont, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
}
a { color: var(--accent); }
img { max-width: 100%; }
.sr-only { position: absolute; width: 1px; height: 1px; opacity: 0; overflow: hidden; pointer-events: none; }

/* 頂部導覽 */
.top {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between; gap: 8px;
  padding: 10px 14px; padding-top: max(10px, env(safe-area-inset-top));
  background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 17px; color: var(--text); text-decoration: none; }
.top nav { display: flex; gap: 2px; }
.top nav a { padding: 6px 12px; border-radius: 999px; color: var(--muted); text-decoration: none; font-size: 15px; }
.top nav a.on { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

main { max-width: 560px; margin: 0 auto; padding: 16px 14px calc(40px + env(safe-area-inset-bottom)); }
main.wide { max-width: 960px; }

.card { background: var(--card); border-radius: var(--radius); box-shadow: var(--shadow); padding: 16px; margin-bottom: 14px; }
.card h2 { font-size: 17px; margin: 0 0 12px; }
.card h2:not(:first-child) { margin-top: 22px; }
.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; margin-bottom: 6px; }
.card-head h2 { margin: 0; }

/* 表單 */
.field { display: block; margin-bottom: 14px; font-size: 14px; color: var(--muted); }
.field input, .field select, .field textarea, table input {
  display: block; width: 100%; margin-top: 5px; padding: 10px 12px;
  font: inherit; font-size: 16px; color: var(--text);
  background: var(--field); border: 1px solid var(--line); border-radius: 10px;
}
.field textarea { resize: vertical; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
input[readonly] { opacity: .6; }
.row { display: flex; gap: 10px; }
.row > .field { flex: 1; min-width: 0; }
.row > .field.grow { flex: 1.6; }
.check { display: flex; align-items: center; gap: 8px; margin: 2px 0 16px; font-size: 15px; }
.check input { width: 20px; height: 20px; margin: 0; flex: none; accent-color: var(--accent); }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 10px 16px; font: inherit; font-size: 15px; font-weight: 600; color: var(--text);
  background: var(--field); border: 1px solid var(--line); border-radius: 10px;
  cursor: pointer; text-decoration: none; -webkit-tap-highlight-color: transparent;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn.big { width: 100%; padding: 14px; font-size: 17px; }
.btn.small { padding: 6px 12px; font-size: 14px; }
.btn:disabled { opacity: .5; cursor: default; }
.link { background: none; border: 0; padding: 2px 0; font: inherit; font-size: 14px; color: var(--accent); cursor: pointer; }
.link.danger { color: var(--danger); }
.link:disabled { color: var(--muted); cursor: default; }
.actions { display: flex; gap: 10px; flex-wrap: wrap; }

/* 收據照片 */
.photo {
  display: flex; align-items: center; justify-content: center;
  aspect-ratio: 4 / 3; overflow: hidden; margin-bottom: 10px; cursor: pointer;
  background: var(--field); border: 2px dashed var(--line); border-radius: 12px;
}
.photo img { width: 100%; height: 100%; object-fit: contain; }
.photo.has { border-style: solid; }
.photo.has .photo-empty { display: none; }
.photo-empty { display: flex; flex-direction: column; align-items: center; gap: 4px; color: var(--muted); }
.photo-icon { font-size: 40px; line-height: 1; }
.photo-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; margin-bottom: 18px; }

/* 拍照自動讀收據 */
.ai-status, .ai-hint { margin: -8px 0 16px; font-size: 14px; }
.ai-hint { font-size: 13px; color: var(--muted); }
.ai-status.busy { color: var(--muted); }
.ai-status.ok { color: var(--accent); }
.ai-status.warn { color: var(--warn-ink); }
.ai-status.error { color: var(--danger); }

/* 金額與美金換算 */
.amount-row input { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; padding: 7px 12px; }
.amount-row select { height: 53px; }
.usd {
  display: flex; align-items: baseline; justify-content: space-between; gap: 4px 10px; flex-wrap: wrap;
  margin: -4px 0 18px; padding: 12px 14px; border-radius: 10px;
  background: var(--accent-soft); color: var(--accent); font-variant-numeric: tabular-nums;
}
.usd b { font-size: 22px; }
.usd span { font-size: 13px; }

.flash { padding: 11px 14px; border-radius: 10px; margin-bottom: 14px; font-size: 15px; overflow-wrap: anywhere; }
.flash.ok { background: var(--ok-bg); color: var(--ok-ink); }
.flash.error { background: var(--err-bg); color: var(--err-ink); }
.flash a { color: inherit; font-weight: 600; }

.toast {
  position: fixed; left: 50%; bottom: calc(24px + env(safe-area-inset-bottom)); z-index: 20;
  transform: translateX(-50%); width: max-content; max-width: calc(100% - 32px);
  padding: 12px 18px; border-radius: 12px; font-size: 15px;
  background: #15181c; color: #fff; box-shadow: 0 8px 24px rgba(0, 0, 0, .25);
}
.toast.error { background: #b42318; }

/* 紀錄 */
.summary { display: flex; justify-content: space-between; align-items: flex-end; }
.summary div { display: flex; flex-direction: column; }
.summary .right { text-align: right; }
.summary b { font-size: 20px; font-variant-numeric: tabular-nums; }
.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 14px; }
.tabs a {
  padding: 6px 14px; border-radius: 999px; font-size: 15px; text-decoration: none;
  background: var(--card); color: var(--muted); box-shadow: var(--shadow);
}
.tabs a.on { background: var(--accent); color: var(--accent-ink); }
.tabs a.right { margin-left: auto; background: none; box-shadow: none; }
.item { display: flex; gap: 12px; align-items: flex-start; padding: 12px; }
.thumb { display: block; width: 56px; height: 56px; object-fit: cover; border-radius: 8px; background: var(--field); }
.item-main { flex: 1; min-width: 0; }
.item-title { font-weight: 600; overflow-wrap: anywhere; }
.item-amount { text-align: right; white-space: nowrap; }
.item-amount form { margin: 4px 0 0; }
.usd-amt { font-weight: 700; font-variant-numeric: tabular-nums; }
.badge { display: inline-block; margin-top: 4px; padding: 1px 8px; border-radius: 999px; font-size: 12px; background: var(--warn-bg); color: var(--warn-ink); }
.badge.done { background: var(--accent-soft); color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.tiny { font-size: 12px; }
.empty { text-align: center; color: var(--muted); padding: 32px 0; margin: 0; }

/* 後台 */
.filters { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 0 10px; align-items: end; }
.filters .btn { margin-bottom: 14px; height: 46px; }
.total-line { display: flex; justify-content: space-between; padding: 10px 0; border-top: 1px solid var(--line); font-variant-numeric: tabular-nums; }
.table-wrap { overflow-x: auto; margin: 0 -16px 14px; padding: 0 16px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; font-variant-numeric: tabular-nums; }
th, td { padding: 8px 6px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { font-size: 13px; font-weight: 500; color: var(--muted); }
.num { text-align: right; }
table input { margin: 0; padding: 7px 9px; min-width: 84px; border-radius: 8px; }
table input.rate { min-width: 110px; }
table input.changed { border-color: #f5a524; box-shadow: 0 0 0 2px rgba(245, 165, 36, .35); }
.batch { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); }
.batch:last-child { border-bottom: 0; }
.batch-actions { display: flex; gap: 14px; flex: none; }
.batch-actions form { margin: 0; }
/* 整批匯入 */
.import-link { display: block; margin: 0 0 12px; font-size: 15px; text-decoration: none; }
.pick { display: flex; align-self: center; }
.pick input { width: 22px; height: 22px; margin: 0; accent-color: var(--accent); }
.import-row.bad { box-shadow: inset 3px 0 0 var(--danger), var(--shadow); }
.import-row.dup { opacity: .75; }
.mini-select {
  margin-top: 6px; max-width: 100%; padding: 6px 8px;
  font: inherit; font-size: 16px; color: var(--text);
  background: var(--field); border: 1px solid var(--line); border-radius: 8px;
}
.badge.bad { background: var(--err-bg); color: var(--err-ink); }
.sticky-actions {
  position: sticky; bottom: 0; display: flex; gap: 10px;
  padding: 12px 0 calc(12px + env(safe-area-inset-bottom)); background: var(--bg);
}
.sticky-actions .btn.primary { flex: 1; }

.drive-link input {
  display: block; width: 100%; margin: 8px 0 4px; padding: 7px 9px;
  font: inherit; font-size: 13px; color: var(--text);
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
}

/* 整批照片 */
.batch-row { padding: 12px; }
.batch-row .field { margin-bottom: 10px; }
.batch-row .field input, .batch-row .field select { padding: 8px 10px; }
.batch-row .check { margin: 0; }
.batch-row.error { box-shadow: inset 3px 0 0 var(--danger), var(--shadow); }
.batch-row.saving { opacity: .55; }
.batch-top { display: flex; gap: 12px; align-items: flex-start; }
.batch-thumb { width: 72px; height: 96px; flex: none; object-fit: cover; border-radius: 8px; background: var(--field); cursor: zoom-in; }
.batch-big { display: block; width: 100%; max-height: 70vh; object-fit: contain; margin-bottom: 10px; border-radius: 10px; background: var(--field); cursor: zoom-out; }
.batch-fields { flex: 1; min-width: 0; }
.usd-line { margin: -4px 0 6px; color: var(--accent); font-variant-numeric: tabular-nums; }
.remove { flex: none; font-size: 18px; line-height: 1; padding: 2px 4px; }
.row-status { margin: 8px 0 0; }
.row-status.busy { color: var(--muted); }
.row-status.ok { color: var(--accent); }
.row-status.warn { color: var(--warn-ink); }
.row-status.error { color: var(--danger); }

/* 修改紀錄、PDF 收據 */
.thumb-link { position: relative; flex: none; }
.pdf-tag {
  position: absolute; left: 4px; bottom: 4px; padding: 0 5px; border-radius: 5px;
  font-size: 10px; font-weight: 700; background: #b42318; color: #fff;
}
.item-amount .link { display: inline-block; margin-top: 4px; text-decoration: none; }
.item-amount form { display: inline-block; margin-left: 12px; }
.edit-receipt { display: block; margin-bottom: 6px; }
.edit-receipt img {
  display: block; width: 100%; max-height: 50vh; object-fit: contain;
  border-radius: 10px; background: var(--field);
}
.photo .pdf-name { position: absolute; left: 10px; bottom: 10px; padding: 2px 8px; border-radius: 6px; font-size: 13px; background: rgba(0, 0, 0, .6); color: #fff; }
.photo { position: relative; }