:root {
  color-scheme: light dark;
  --bg: #F2F2F7;
  --card-bg: #FFFFFF;
  --card-shadow: 0 1px 2px rgba(0,0,0,.04), 0 1px 8px rgba(0,0,0,.04);
  --label: #1C1C1E;
  --label-secondary: #6C6C70;
  --separator: #E5E5EA;
  --fill-secondary: #E5E5EA;
  --accent: #007AFF;
  --accent-tint: rgba(0,122,255,.12);
  --red: #FF3B30;
  --red-tint: rgba(255,59,48,.12);
  --green: #34C759;
  --header-bg: rgba(242,242,247,.82);
}

/* 深色配色。「跟著系統」是由 theme.js 解析成 light/dark 後寫進 data-theme 的，
   所以這裡不用再寫一次 @media (prefers-color-scheme: dark)——同一組顏色只維護一份。 */
:root[data-theme="dark"] {
    color-scheme: dark;
    --bg: #000000;
    --card-bg: #1C1C1E;
    --card-shadow: none;
    --label: #F2F2F7;
    --label-secondary: #98989D;
    --separator: #38383A;
    --fill-secondary: #2C2C2E;
    --accent: #0A84FF;
    --accent-tint: rgba(10,132,255,.18);
    --red: #FF453A;
    --red-tint: rgba(255,69,58,.18);
    --green: #30D158;
    --header-bg: rgba(20,20,22,.82);
}

:root[data-theme="light"] { color-scheme: light; }

* { -webkit-tap-highlight-color: transparent; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang TC",
    "Microsoft JhengHei", "Helvetica Neue", sans-serif;
  margin: 0;
  padding: 0 0 calc(40px + env(safe-area-inset-bottom));
  background: var(--bg);
  color: var(--label);
  -webkit-font-smoothing: antialiased;
}

header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: calc(14px + env(safe-area-inset-top)) 16px 12px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  background: var(--header-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid var(--separator);
}
h1 {
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 3px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}
/* 車牌圖是黑線透明底，深色配色下要反白才看得見 */
:root[data-theme="dark"] .brand-icon { filter: invert(1); }

/* 配色切換鈕：長得跟旁邊的 nav 連結一樣，不要多一顆按鈕框搶注意力 */
.theme-toggle {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 15px;
  font-weight: 500;
  font-family: inherit;
  padding: 6px 4px;
  cursor: pointer;
}
.theme-toggle:active { opacity: 0.5; }
.meta {
  color: var(--label-secondary);
  font-size: 12.5px;
  line-height: 1.5;
}
nav a {
  color: var(--accent);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 6px 4px;
}
nav a:active { opacity: 0.5; }
.nav-username {
  color: var(--label-secondary);
  font-size: 14px;
  padding: 6px 2px;
}

.container {
  padding: 0 16px;
}

.banner {
  display: none;
  align-items: center;
  gap: 8px;
  background: var(--red-tint);
  color: var(--red);
  padding: 12px 14px;
  border-radius: 14px;
  margin: 12px 0;
  font-weight: 600;
  font-size: 13.5px;
  line-height: 1.4;
}
.banner.show { display: flex; }
.banner .dot {
  flex-shrink: 0;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--red);
  animation: pulse 1.4s infinite;
}
@keyframes pulse {
  0% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
  100% { opacity: 1; transform: scale(1); }
}

.toolbar, .panel, .ios-list-group {
  background: var(--card-bg);
  border-radius: 14px;
  box-shadow: var(--card-shadow);
}
.toolbar, .panel {
  padding: 14px 16px 16px;
  margin: 12px 0;
}
/* 統計圖表的 SVG viewBox 是固定的 320x160，.container 在桌機上沒有 max-width，
   不擋住的話寬螢幕會把整個 SVG 座標系統等比例放大，文字、格線全部變得巨大。
   跟彈窗裡的走勢圖一樣限制在差不多的寬度，維持字級比例正常。
   限寬之後在寬螢幕上會靠左、右邊空一大片，所以外層 .stats-chart-wrap 置中。 */
#statsChart svg {
  max-width: 560px;
}
.stats-chart-wrap {
  max-width: 560px;
  margin: 0 auto;
}
.stats-chart-title {
  font-size: 12px;
  color: var(--label-secondary);
  text-align: center;
  margin-bottom: 8px;
}

/* 決標統計的數字（共幾面／平均／最高／最低）原本擠成一行灰色小字，
   改成一排數字磚：寬螢幕自動攤開填滿，手機自動折成兩欄。 */
.stat-tiles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(132px, 1fr));
  gap: 8px;
  margin-bottom: 14px;
}
.stat-tile {
  background: var(--fill-secondary);
  border-radius: 12px;
  padding: 10px 12px;
}
.stat-tile .stat-label {
  font-size: 11.5px;
  font-weight: 500;
  color: var(--label-secondary);
  letter-spacing: .3px;
}
.stat-tile .stat-value {
  margin-top: 2px;
  font-size: 19px;
  font-weight: 650;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}
.stat-tile .stat-unit {
  margin-left: 2px;
  font-size: 12px;
  font-weight: 500;
  color: var(--label-secondary);
}

/* 只有一天決標紀錄時畫折線圖沒有意義（一個點連不成線），改成畫當天的
   價格區間帶：最低到最高的範圍，平均值標在實際位置上。 */
.stats-range {
  max-width: 560px;
  margin: 0 auto;
}
.stats-range-bar {
  position: relative;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-tint), var(--accent));
  margin: 26px 0 8px;
}
.stats-range-avg {
  position: absolute;
  top: -4px;
  width: 4px;
  height: 16px;
  border-radius: 2px;
  background: var(--label);
  transform: translateX(-2px);
}
.stats-range-avg-label {
  position: absolute;
  top: -24px;
  transform: translateX(-50%);
  white-space: nowrap;
  font-size: 11.5px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.stats-range-ends {
  display: flex;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--label-secondary);
  font-variant-numeric: tabular-nums;
}
.toolbar > strong, .toolbar > div > strong {
  font-size: 13px;
  font-weight: 600;
  color: var(--label-secondary);
  text-transform: uppercase;
  letter-spacing: .3px;
}

.cat-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  max-height: 150px;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  margin: 10px 0 12px;
}
.cat-grid label {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  min-height: 36px;
  box-sizing: border-box;
  border-radius: 999px;
  background: var(--fill-secondary);
  color: var(--label);
  font-size: 13.5px;
  font-weight: 500;
  cursor: pointer;
  user-select: none;
  transition: background .15s ease, color .15s ease;
}
.cat-grid input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.cat-grid label:has(input:checked),
.cat-grid label.active {
  background: var(--accent);
  color: #fff;
}
.cat-grid label:active { opacity: .7; }

.toolbar-buttons {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}
button, input[type="submit"] {
  border: none;
  background: var(--fill-secondary);
  color: var(--accent);
  border-radius: 999px;
  padding: 10px 16px;
  min-height: 40px;
  box-sizing: border-box;
  cursor: pointer;
  font-size: 13.5px;
  font-weight: 600;
  font-family: inherit;
  transition: opacity .1s ease;
}
button:active { opacity: .6; }
button.primary {
  background: var(--accent);
  color: #fff;
}
#scanningTag {
  display: none;
  align-items: center;
  gap: 6px;
  color: var(--label-secondary);
  font-size: 13px;
  font-weight: 500;
}
#scanningTag .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 1s infinite;
}

.table-wrap {
  max-height: 70vh;
  overflow: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 14px;
  background: var(--card-bg);
  box-shadow: var(--card-shadow);
  margin: 12px 0 20px;
}
table {
  width: 100%;
  border-collapse: collapse;
}
th, td {
  padding: 10px 12px;
  text-align: center;
  border-bottom: 0.5px solid var(--separator);
  font-size: 13px;
  white-space: nowrap;
}
th {
  background: var(--card-bg);
  color: var(--label-secondary);
  font-size: 11.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .3px;
  position: sticky;
  top: 0;
  box-shadow: inset 0 -0.5px 0 var(--separator);
}
tr.urgent {
  box-shadow: inset 3px 0 0 var(--red);
  font-weight: 600;
}
tr.urgent td.remain {
  color: var(--red);
}
td.remain {
  font-variant-numeric: tabular-nums;
}
.empty-row td {
  padding: 40px;
  color: var(--label-secondary);
}

.pagination-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  margin: 20px 0;
}
.pagination-row .page-info {
  font-size: 13px;
  color: var(--label-secondary);
  white-space: nowrap;
}
.pagination-row button:disabled {
  opacity: .35;
  cursor: default;
}

.filter-row {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.filter-row select,
.filter-row input[type="text"] {
  flex: 1;
  min-width: 140px;
  min-height: 40px;
  box-sizing: border-box;
  padding: 9px 10px;
  border-radius: 10px;
  border: none;
  background: var(--fill-secondary);
  color: var(--label);
  font-size: 14px;
  font-family: inherit;
}
.filter-row input[type="text"]::placeholder { color: var(--label-secondary); }
.number-row {
  cursor: pointer;
  gap: 10px;
}
.number-row:active { background: var(--fill-secondary); }

.hist-btn {
  background: var(--accent-tint);
  color: var(--accent);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 14px;
  min-width: 40px;
  min-height: 40px;
}

/* --- 個人追蹤清單 --- */
.watch-btn {
  background: transparent;
  color: var(--label-secondary);
  border-radius: 999px;
  padding: 6px;
  font-size: 20px;
  line-height: 1;
  min-width: 36px;
  min-height: 36px;
}
.watch-btn.on { color: #FF9F0A; }
.watch-btn:active { opacity: .5; }

.watch-filter {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
}

/* --- 歷史紀錄 iOS 風格彈出視窗 --- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(0, 0, 0, .4);
  align-items: flex-end;
  justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal-sheet {
  background: var(--card-bg);
  width: 100%;
  max-width: 480px;
  max-height: 82vh;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 20px 20px 0 0;
  padding: 16px 16px calc(16px + env(safe-area-inset-bottom));
  box-sizing: border-box;
  animation: sheet-up .22s ease-out;
}
@media (min-width: 540px) {
  .modal-overlay { align-items: center; }
  .modal-sheet { border-radius: 20px; max-height: 80vh; }
}
@keyframes sheet-up {
  from { transform: translateY(24px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.modal-header strong {
  font-size: 16px;
  font-weight: 700;
}
.modal-close {
  background: var(--fill-secondary);
  color: var(--label-secondary);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  min-height: 32px;
  padding: 0;
  font-size: 13px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.decided-banner {
  display: none;
  background: rgba(52, 199, 89, .12);
  color: var(--green, #34C759);
  border-radius: 12px;
  padding: 10px 12px;
  margin-bottom: 10px;
  font-size: 13px;
  font-weight: 500;
}
.decided-banner strong { font-weight: 700; }
.decided-banner .hint { color: var(--green, #34C759); opacity: .8; }

.chart-actions {
  display: flex;
  justify-content: flex-end;
  margin-top: 6px;
}
.chart-actions button {
  padding: 7px 14px;
  font-size: 12.5px;
  min-height: 32px;
}

.history-table-wrap {
  margin-top: 12px;
  max-height: 240px;
  -webkit-overflow-scrolling: touch;
  box-shadow: none;
  border: 0.5px solid var(--separator);
}

/* --- 設定頁 iOS 分組列表 --- */
.ios-list-header {
  font-size: 12.5px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .4px;
  color: var(--label-secondary);
  margin: 22px 4px 8px;
}
.ios-list-header:first-child { margin-top: 4px; }

.ios-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 16px;
  min-height: 44px;
  box-sizing: border-box;
  border-bottom: 0.5px solid var(--separator);
}
.ios-row:last-child { border-bottom: none; }
.ios-row > label:first-child {
  font-size: 15px;
  color: var(--label);
  flex-shrink: 0;
}
.ios-row.column {
  flex-direction: column;
  align-items: stretch;
}
.ios-row.column > label:first-child { margin-bottom: 6px; }

.ios-row input[type="text"],
.ios-row input[type="password"],
.ios-row input[type="number"],
.ios-row input[type="email"] {
  border: none;
  background: transparent;
  text-align: right;
  font-size: 15px;
  color: var(--label);
  flex: 1;
  min-width: 0;
  padding: 0;
  font-family: inherit;
}
.ios-row.column input {
  text-align: left;
  background: var(--fill-secondary);
  border-radius: 10px;
  padding: 9px 10px;
}
.ios-row input:focus { outline: none; }
.ios-row input::placeholder { color: var(--label-secondary); }

/* 小時 + 分鐘同時輸入的時間欄位（例如「2 小時 30 分」）——放在 .ios-row.column
   底下自成一行，不用跟很長的 label 擠同一行，數字欄位也要有明顯的框，
   不然使用者分不出哪裡是可以點的輸入框、哪裡只是單位文字。 */
.unit-input-group {
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
}
.unit-input-group input[type="number"] {
  flex: 0 0 56px;
  width: 56px;
  text-align: center;
  background: var(--fill-secondary);
  border-radius: 8px;
  padding: 8px 4px;
}
.unit-input-group .unit-label {
  flex: 0 0 auto;
  font-size: 14px;
  color: var(--label-secondary);
  margin-right: 8px;
}

/* 密碼欄位的「顯示/隱藏」切換 */
.pw-field { position: relative; display: block; width: 100%; }
.pw-field input {
  width: 100%;
  box-sizing: border-box;
  padding-right: 52px !important;
}
.pw-toggle {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 4px 8px;
  font-size: 13px;
  color: var(--accent);
  cursor: pointer;
}
.pw-toggle:focus { outline: none; }

/* iOS 開關 */
.ios-switch {
  position: relative;
  display: inline-block;
  width: 51px;
  height: 31px;
  flex-shrink: 0;
}
.ios-switch input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}
.ios-switch-track {
  position: absolute;
  inset: 0;
  background: var(--fill-secondary);
  border-radius: 999px;
  transition: background .18s ease;
  cursor: pointer;
}
.ios-switch-track::before {
  content: "";
  position: absolute;
  width: 27px;
  height: 27px;
  left: 2px;
  top: 2px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 3px 8px rgba(0,0,0,.15), 0 1px 1px rgba(0,0,0,.08);
  transition: transform .18s ease;
}
.ios-switch input:checked + .ios-switch-track {
  background: var(--green);
}
.ios-switch input:checked + .ios-switch-track::before {
  transform: translateX(20px);
}

.hint {
  font-size: 12.5px;
  color: var(--label-secondary);
  line-height: 1.6;
  margin: 8px 4px 0;
}
.hint a { color: var(--accent); text-decoration: none; }
.hint code {
  background: var(--fill-secondary);
  border-radius: 4px;
  padding: 1px 5px;
  font-size: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}

.ios-btn-block {
  display: block;
  width: 100%;
  box-sizing: border-box;
  text-align: center;
  padding: 14px;
  border-radius: 14px;
  font-size: 16px;
  font-weight: 600;
  margin-top: 12px;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.ios-btn-block.primary { background: var(--accent); color: #fff; }
.ios-btn-block.secondary { background: var(--accent-tint); color: var(--accent); }
.ios-btn-block:active { opacity: .7; }

.status-msg {
  font-size: 13px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 12px;
  display: none;
  font-weight: 500;
  text-align: center;
}
.status-msg.ok { display: block; background: var(--accent-tint); color: var(--accent); }
.status-msg.err { display: block; background: var(--red-tint); color: var(--red); }