/* ===== Design Tokens ===== */
:root {
  --bg: #f2f2f7;
  --bg-elevated: #ffffff;
  --bg-soft: #ffffff;
  --text: #1c1c1e;
  --text-muted: #8e8e93;
  --border: #e5e5ea;
  --accent: #0a84ff;
  --accent-soft: #e7f1ff;
  --danger: #ff3b30;
  --success: #34c759;
  --warning: #ff9500;
  --shadow: 0 1px 3px rgba(0,0,0,.04), 0 8px 24px rgba(0,0,0,.04);
  --radius: 14px;
  --radius-sm: 10px;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --tabbar-h: 64px;
  --topbar-h: 52px;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    --bg: #000000;
    --bg-elevated: #1c1c1e;
    --bg-soft: #2c2c2e;
    --text: #f2f2f7;
    --text-muted: #8e8e93;
    --border: #38383a;
    --accent: #0a84ff;
    --accent-soft: #1a2a44;
    --shadow: none;
  }
}
:root[data-theme="dark"] {
  --bg: #000000;
  --bg-elevated: #1c1c1e;
  --bg-soft: #2c2c2e;
  --text: #f2f2f7;
  --text-muted: #8e8e93;
  --border: #38383a;
  --accent: #0a84ff;
  --accent-soft: #1a2a44;
  --shadow: none;
}

/* ===== Base ===== */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue",
    "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
  font-size: 18px; line-height: 1.5; -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased; overscroll-behavior-y: none;
}
body { overflow-x: clip; }
h2, h3 { margin: 0; font-weight: 600; }
h2 { font-size: 17px; color: var(--text-muted); text-transform: none; letter-spacing: .02em; }
h3 { font-size: 18px; }
button { font: inherit; color: inherit; cursor: pointer; }
input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); text-decoration: none; }

/* ===== Top Bar ===== */
.topbar {
  position: sticky; top: 0; z-index: 10;
  padding-top: calc(var(--safe-top) + 8px);
  padding-bottom: 8px;
  padding-right: max(14px, env(safe-area-inset-right));
  padding-left: max(14px, env(safe-area-inset-left));
  display: flex; align-items: center; justify-content: space-between;
  background: var(--bg); backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
.month-switcher { display: flex; align-items: center; gap: 4px; }
.month-label {
  background: transparent; border: 0; padding: 6px 10px;
  font-weight: 600; font-size: 17px; color: var(--text);
  border-radius: 8px;
}
.month-label:active { background: var(--bg-soft); }
.icon-btn {
  background: transparent; border: 0; width: 36px; height: 36px;
  border-radius: 8px; display: inline-flex; align-items: center; justify-content: center;
  color: var(--text); font-size: 22px;
}
.icon-btn:active { background: var(--bg-soft); }

/* ===== Main layout ===== */
.main {
  padding-top: 14px;
  padding-right: max(14px, env(safe-area-inset-right));
  padding-left: max(14px, env(safe-area-inset-left));
  padding-bottom: calc(var(--tabbar-h) + var(--safe-bottom) + 14px);
  max-width: min(760px, 100%); margin: 0 auto;
  box-sizing: border-box;
}
.add-form, .tx-list, .summary-card, .filter-bar, .chart-card, .settings-group, .budget-list {
  max-width: 100%;
}
/* 強制所有 form 元素不超出容器（修 Android 的 datetime-local / select 預設寬度太寬問題）*/
input, select, textarea, button {
  max-width: 100%; min-width: 0; box-sizing: border-box;
}
.add-form input, .add-form select, .add-form textarea {
  width: 100%;
}
.segmented .seg {
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.view { display: block; }
.view[hidden] { display: none; }

/* ===== Cards & sections ===== */
.summary-card {
  background: linear-gradient(135deg, var(--accent) 0%, #5856d6 100%);
  color: #fff; border-radius: var(--radius);
  padding: 18px 18px 16px; box-shadow: var(--shadow);
  margin-bottom: 20px;
}
.summary-label { font-size: 13px; opacity: .85; }
.summary-amount { font-size: 32px; font-weight: 700; margin-top: 4px; }
.summary-sub {
  display: flex; gap: 18px; margin-top: 10px; font-size: 13px; opacity: .9;
}
.summary-sub strong { font-weight: 600; margin-left: 4px; }

.section-header {
  display: flex; justify-content: space-between; align-items: baseline;
  margin: 18px 2px 8px;
}
.text-btn {
  background: transparent; border: 0; color: var(--accent); font-size: 14px; padding: 4px 6px;
}

.empty-hint {
  background: var(--bg-elevated); border-radius: var(--radius); padding: 18px;
  color: var(--text-muted); font-size: 14px; text-align: center;
  box-shadow: var(--shadow);
}

/* ===== Transaction list ===== */
.tx-list {
  background: var(--bg-elevated); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
}
.tx-list:empty::after {
  content: "尚無交易"; display: block; padding: 22px;
  color: var(--text-muted); font-size: 14px; text-align: center;
}
.tx-day-header {
  padding: 10px 14px 4px;
  font-size: 13px; color: var(--text-muted);
  background: var(--bg-elevated);
  border-top: 1px solid var(--border);
  display: flex; justify-content: space-between;
}
.tx-day-header:first-child { border-top: 0; }
.tx-item {
  display: grid; grid-template-columns: 44px 1fr auto; gap: 12px; align-items: center;
  padding: 14px 16px; border-top: 1px solid var(--border); cursor: pointer;
}
.tx-item.selectable {
  grid-template-columns: 24px 44px 1fr auto;
}
.tx-item:active { background: var(--bg-soft); }
.tx-icon {
  width: 44px; height: 44px; border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px; color: #fff;  /* 加大 emoji */
  background: #2c2c2e;  /* 預設全黑（深色 iOS 灰）；emoji 圖示在前景 */
  line-height: 1;
}
.tx-main { min-width: 0; }
.tx-merchant {
  font-size: 17px; font-weight: 500; color: var(--text);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.tx-sub {
  font-size: 13px; color: var(--text-muted); margin-top: 3px;
  display: flex; gap: 8px; align-items: center;
}
.tx-source-tag {
  font-size: 11px; padding: 1px 6px; border-radius: 4px;
  background: var(--accent-soft); color: var(--accent);
}
.tx-note {
  font-size: 13px; color: var(--text); margin-top: 4px;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  padding: 3px 8px; background: var(--accent-soft); border-radius: 6px;
  display: inline-block; max-width: 100%; opacity: 0.85;
}
.tx-amount {
  font-size: 18px; font-weight: 600; font-variant-numeric: tabular-nums;
}
.tx-amount.expense { color: var(--text); }
.tx-amount.income { color: var(--success); }
.tx-amount.transfer { color: var(--warning); }

/* ===== Budget progress ===== */
.budget-list { display: grid; gap: 10px; }
.budget-item {
  background: var(--bg-elevated); border-radius: var(--radius);
  padding: 12px 14px; box-shadow: var(--shadow);
}
.budget-top { display: flex; justify-content: space-between; font-size: 14px; }
.budget-cat { font-weight: 500; }
.budget-ratio { font-variant-numeric: tabular-nums; color: var(--text-muted); font-size: 12px; }
.budget-bar {
  height: 6px; background: var(--bg-soft); border-radius: 3px; margin-top: 8px; overflow: hidden;
}
.budget-fill { height: 100%; background: var(--accent); transition: width .3s; }
.budget-fill.warn { background: var(--warning); }
.budget-fill.over { background: var(--danger); }

/* ===== Forms ===== */
.add-form {
  background: var(--bg-elevated); border-radius: var(--radius);
  padding: 14px; box-shadow: var(--shadow); display: grid; gap: 14px;
}
.segmented {
  display: grid; grid-template-columns: repeat(3, 1fr);
  background: var(--bg-soft); padding: 3px; border-radius: 10px;
  width: 100%; max-width: 100%;
}
.seg {
  background: transparent; border: 0; padding: 10px 4px; border-radius: 8px;
  font-size: 16px; font-weight: 500; color: var(--text-muted);
  min-width: 0;
}
.seg.active { background: var(--bg-elevated); color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,.06); }

.field { display: grid; gap: 6px; }
.label-text { font-size: 14px; color: var(--text-muted); padding-left: 2px; }
.field input, .field select, .field textarea {
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; background: var(--bg-soft); outline: none;
  font-size: 17px;
}
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: var(--accent); background: var(--bg-elevated);
}

.amount-field .amount-input {
  display: flex; align-items: center; gap: 8px;
  background: var(--bg-soft); border-radius: var(--radius-sm);
  padding: 12px 14px; border: 1px solid var(--border);
}
.amount-field .amount-input:focus-within { border-color: var(--accent); background: var(--bg-elevated); }
.amount-field .currency { color: var(--text-muted); font-size: 18px; }
.amount-field input {
  flex: 1; border: 0; background: transparent; padding: 0;
  font-size: 28px; font-weight: 600; font-variant-numeric: tabular-nums;
}

.category-picker {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(74px, 1fr));
  gap: 8px;
}
.cat-chip {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  padding: 10px 6px; border-radius: 10px; background: var(--bg-soft);
  border: 2px solid transparent; cursor: pointer; font-size: 12px; text-align: center;
}
.cat-chip.selected { border-color: var(--accent); background: var(--accent-soft); }
.cat-chip .cat-ico {
  width: 40px; height: 40px; border-radius: 10px; display: flex;
  align-items: center; justify-content: center; color: #fff; font-size: 26px;
  line-height: 1;
}

.primary-btn {
  background: var(--accent); color: #fff; border: 0;
  padding: 14px; border-radius: var(--radius-sm); font-size: 16px; font-weight: 600;
}
.primary-btn:active { opacity: .85; }

.ghost-btn {
  background: var(--bg-soft); border: 1px solid var(--border); color: var(--text);
  padding: 10px 14px; border-radius: var(--radius-sm); font-size: 14px;
}
.ghost-btn:active { background: var(--border); }
.ghost-btn.danger { color: var(--danger); }
.btn-row { display: flex; flex-wrap: wrap; gap: 8px; }

/* ===== Filters ===== */
.filter-bar {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-bottom: 12px;
}
.filter-bar select {
  width: 100%;
  border: 1px solid var(--border); background: var(--bg-elevated); color: var(--text);
  padding: 8px 10px; border-radius: 8px; font-size: 13px;
}
.filter-summary {
  background: var(--bg-elevated); border-radius: var(--radius);
  padding: 10px 14px; margin-bottom: 10px; box-shadow: var(--shadow);
  display: flex; flex-wrap: wrap; gap: 14px; font-size: 13px;
  align-items: baseline;
}
.filter-summary .fs-count { color: var(--text-muted); }
.filter-summary .fs-item { display: inline-flex; align-items: baseline; gap: 4px; }
.filter-summary .fs-label { color: var(--text-muted); font-size: 12px; }
.filter-summary .fs-amt {
  font-weight: 600; font-variant-numeric: tabular-nums;
}
.filter-summary .fs-amt.expense { color: var(--text); }
.filter-summary .fs-amt.income { color: var(--success); }
.filter-summary .fs-amt.net { color: var(--accent); }

/* 多選工具列 */
.select-bar {
  display: flex; align-items: center; gap: 8px; margin-bottom: 8px;
  flex-wrap: wrap;
}
.tx-item.selectable { padding-left: 8px; }
.tx-item.selected {
  background: var(--accent-soft);
}
.tx-checkbox {
  width: 22px; height: 22px; flex-shrink: 0;
  border: 2px solid var(--border); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin-right: 4px;
  transition: all .15s;
}
.tx-checkbox.checked {
  background: var(--accent); border-color: var(--accent); color: #fff;
}
.tx-checkbox.checked::after {
  content: "✓"; font-size: 14px; font-weight: 700;
}

/* ===== Charts ===== */
.chart-card {
  background: #1c1c1e; border-radius: var(--radius);
  padding: 14px; margin-bottom: 14px; box-shadow: var(--shadow);
}
.chart-card h3 { margin-bottom: 10px; font-size: 16px; color: #ffffff; font-weight: 600; }
.chart-wrap { position: relative; height: 320px; }

/* ===== Settings ===== */
.settings-group {
  background: var(--bg-elevated); border-radius: var(--radius);
  padding: 14px; margin-bottom: 14px; box-shadow: var(--shadow);
  display: grid; gap: 10px;
}
.settings-group h3 { font-size: 14px; color: var(--text-muted); font-weight: 500; }
.settings-group .muted { font-size: 13px; color: var(--text-muted); margin: 0; }
.settings-group .small { font-size: 12px; }

.account-row, .category-row, .budget-row {
  display: grid; grid-template-columns: 40px 1fr auto; gap: 10px; align-items: center;
  padding: 8px 0; border-top: 1px solid var(--border);
}
.account-row:first-of-type, .category-row:first-of-type, .budget-row:first-of-type { border-top: 0; }
.swatch {
  width: 40px; height: 40px; border-radius: 10px;
  font-size: 24px; line-height: 1;
}
.row-delete {
  background: transparent; border: 0; color: var(--danger); font-size: 18px;
}

.sync-status {
  display: flex; align-items: center; gap: 8px; font-size: 13px;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: var(--text-muted);
}
.status-dot.on { background: var(--success); }
.status-dot.off { background: var(--text-muted); }
.status-dot.err { background: var(--danger); }

.setup-hint { margin-top: 6px; }
.setup-hint summary {
  cursor: pointer; font-size: 13px; color: var(--accent); padding: 4px 0;
}
.hint-ol { padding-left: 20px; font-size: 13px; color: var(--text); }
.hint-ol code {
  background: var(--bg-soft); padding: 1px 5px; border-radius: 4px; font-size: 12px;
}

/* ===== Tab bar ===== */
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  display: grid; grid-template-columns: repeat(5, 1fr);
  padding-bottom: var(--safe-bottom);
  padding-left: env(safe-area-inset-left);
  padding-right: env(safe-area-inset-right);
  background: var(--bg-elevated); border-top: 1px solid var(--border);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  box-sizing: border-box;
}
.tab {
  background: transparent; border: 0;
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  padding: 10px 6px 8px; color: var(--text-muted); font-size: 10px;
}
.tab svg { width: 22px; height: 22px; }
.tab.active { color: var(--accent); }

/* ===== Modal ===== */
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  display: flex; align-items: flex-end; justify-content: center; z-index: 50;
  padding: 14px;
}
.modal-backdrop[hidden] { display: none; }
.toast[hidden] { display: none; }
.modal {
  background: var(--bg-elevated); border-radius: 16px 16px 0 0;
  width: 100%; max-width: 480px; max-height: 85vh; overflow: hidden;
  display: flex; flex-direction: column;
  animation: slide-up .25s ease-out;
}
@keyframes slide-up { from { transform: translateY(20px); opacity: 0; } }
.modal-header {
  padding: 12px 14px; border-bottom: 1px solid var(--border);
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 600;
}
.modal-body { padding: 14px; overflow: auto; display: grid; gap: 12px; }

/* ===== Toast ===== */
.toast {
  position: fixed; left: 50%; bottom: calc(var(--tabbar-h) + 24px);
  transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 10px 16px; border-radius: 22px; font-size: 13px;
  z-index: 60; box-shadow: 0 8px 24px rgba(0,0,0,.2);
  animation: toast-in .2s ease-out;
}
@keyframes toast-in { from { transform: translate(-50%, 8px); opacity: 0; } }

/* ===== Responsive tweaks ===== */
@media (min-width: 700px) {
  .tabbar { max-width: 760px; left: 50%; transform: translateX(-50%); border-radius: 16px 16px 0 0; }
  .summary-amount { font-size: 40px; }
}