/* 借貸投資利差試算 — 樣式 */

/* ===== 主題色票（淺色） ===== */
:root {
  color-scheme: light;
  --bg: #f5f6f8;
  --surface: #ffffff;
  --surface-2: #f0f2f5;
  --border: #e1e5ea;
  --text: #1b1f24;
  --text-2: #4a525c;
  --text-3: #6b7480;
  --accent: #2457c5;
  --accent-soft: #e8eefb;
  --on-accent: #ffffff;
  /* 台股慣例：紅漲綠跌 */
  --gain: #cf2f2a;
  --loss: #12804a;
  --gain-fill: rgba(207, 47, 42, 0.14);
  --loss-fill: rgba(18, 128, 74, 0.14);
  --warn: #a35f00;
  --warn-bg: #fff5e0;
  --danger: #b42318;
  --danger-bg: #fdecea;
  /* 還款壓力燈號 */
  --safe: #0f7b6c;
  --caution: #a35f00;
  --tight: #c2410c;
  /* 圖表 */
  --series-1: #2457c5;
  --series-2: #c2410c;
  --series-2-soft: rgba(194, 65, 12, 0.32);
  --series-3: #0f7b6c;
  --grid: rgba(0, 0, 0, 0.06);
  --shadow: 0 1px 2px rgba(16, 24, 40, 0.05);
  --radius: 12px;
  --font: 'Noto Sans TC', 'Microsoft JhengHei', 'PingFang TC', system-ui, -apple-system, 'Segoe UI', sans-serif;
}

/* ===== 深色主題 ===== */
@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1216;
    --surface: #171b21;
    --surface-2: #1f242c;
    --border: #2b323c;
    --text: #e6e9ee;
    --text-2: #b6bec9;
    --text-3: #8b95a3;
    --accent: #7aa2ff;
    --accent-soft: rgba(122, 162, 255, 0.14);
    --on-accent: #0f1216;
    --gain: #ff6b63;
    --loss: #3ccf8e;
    --gain-fill: rgba(255, 107, 99, 0.16);
    --loss-fill: rgba(60, 207, 142, 0.16);
    --warn: #f0b44c;
    --warn-bg: rgba(240, 180, 76, 0.12);
    --danger: #ff7a70;
    --danger-bg: rgba(255, 122, 112, 0.13);
    --safe: #3cc6b0;
    --caution: #f0b44c;
    --tight: #ff9a5c;
    --series-1: #7aa2ff;
    --series-2: #ff9a5c;
    --series-2-soft: rgba(255, 154, 92, 0.38);
    --series-3: #3cc6b0;
    --grid: rgba(255, 255, 255, 0.08);
    --shadow: none;
  }
}

/* ===== 基本 ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
}

[x-cloak] {
  display: none !important;
}

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.55;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.3;
}

h1 {
  font-size: 1.25rem;
}

h2 {
  font-size: 1.05rem;
}

h3 {
  font-size: 0.95rem;
  margin: 20px 0 8px;
  color: var(--text-2);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.wrap {
  max-width: 1480px;
  margin: 0 auto;
  padding-inline: 16px;
}

.hint {
  display: block;
  color: var(--text-3);
  font-size: 0.82rem;
  margin: 2px 0 0;
}

.wan {
  color: var(--accent);
  margin-left: 4px;
}

.gain {
  color: var(--gain);
}

.loss {
  color: var(--loss);
}

.text-danger {
  color: var(--danger);
  font-weight: 700;
}

/* ===== 頁首與方案管理 ===== */
.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding-top: env(safe-area-inset-top, 0px);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 16px;
  padding-block: 12px;
}

.plan-bar-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.plan-select {
  min-width: 0;
  width: 220px;
  max-width: 100%;
}

.confirm-row {
  color: var(--danger);
}

.notice {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--warn-bg);
  border: 1px solid var(--warn);
}

/* ===== 按鈕與表單 ===== */
.btn {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.btn:hover {
  background: var(--surface-2);
}

.btn.is-active {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--accent);
  filter: brightness(1.08);
}

.btn-danger {
  background: var(--danger);
  border-color: var(--danger);
  color: #fff;
}

.btn-danger:hover {
  background: var(--danger);
  filter: brightness(1.08);
}

.btn-danger-ghost {
  color: var(--danger);
}

input[type='number'],
input[type='text'],
select,
textarea {
  width: 100%;
  min-height: 38px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--surface);
  color: var(--text);
  font: inherit;
}

input:disabled {
  opacity: 0.55;
}

textarea {
  font-family: ui-monospace, Consolas, 'Courier New', monospace;
  font-size: 0.82rem;
  resize: vertical;
}

input[type='number'] {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

.fields {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.field {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.field > label,
.field > .label {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-2);
}

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.input-unit {
  display: flex;
  align-items: center;
  gap: 6px;
}

.input-unit > span {
  flex: none;
  min-width: 1.4em;
  color: var(--text-3);
  font-size: 0.86rem;
}

.sub-fields {
  display: grid;
  gap: 12px;
  padding: 12px;
  border-radius: 10px;
  background: var(--surface-2);
}

.check,
.radio {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  min-height: 32px;
  cursor: pointer;
}

.check input,
.radio input {
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  flex: none;
  accent-color: var(--accent);
}

.check.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.radios {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.segmented {
  display: inline-flex;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  background: var(--surface);
  max-width: 100%;
}

.segmented button {
  min-height: 38px;
  padding: 0 14px;
  border: 0;
  background: transparent;
  color: var(--text-2);
  font: inherit;
  font-size: 0.9rem;
  cursor: pointer;
}

.segmented button + button {
  border-left: 1px solid var(--border);
}

.segmented button.is-on {
  background: var(--accent);
  color: var(--on-accent);
  font-weight: 600;
}

.segmented button:disabled {
  cursor: not-allowed;
  opacity: 0.6;
}

.radios-col {
  flex-direction: column;
}

.suggest {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  margin-top: 4px;
}

.suggest .hint {
  margin: 0;
  color: var(--text-2);
}

.btn-sm {
  min-height: 30px;
  padding: 0 10px;
  font-size: 0.82rem;
}

.segmented-sm button {
  min-height: 32px;
  padding: 0 12px;
}

/* ===== 版面 ===== */
.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  padding-block: 16px 32px;
}

.inputs,
.results {
  display: grid;
  gap: 16px;
  min-width: 0;
  align-content: start;
}

@media (min-width: 1100px) {
  .layout {
    grid-template-columns: 400px minmax(0, 1fr);
    align-items: start;
  }

  .inputs {
    position: sticky;
    top: 12px;
    max-height: calc(100vh - 24px);
    overflow-y: auto;
    padding-right: 4px;
  }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  min-width: 0;
}

.card > h2 {
  margin-bottom: 12px;
}

.card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

details.card > summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  cursor: pointer;
  min-height: 28px;
}

details.card > summary::-webkit-details-marker {
  display: none;
}

details.card > summary::after {
  content: '▾';
  color: var(--text-3);
  transition: transform 0.15s;
}

details.card:not([open]) > summary::after {
  transform: rotate(-90deg);
}

.io-panel {
  margin-top: 16px;
}

.io-panel textarea {
  margin-top: 8px;
}

.io-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-top: 8px;
}

.io-message {
  color: var(--text-2);
  font-size: 0.86rem;
}

/* ===== 還款壓力判定 ===== */
.verdict {
  border-left: 6px solid var(--safe);
}

.verdict.level-caution {
  border-left-color: var(--caution);
}

.verdict.level-tight {
  border-left-color: var(--tight);
}

.verdict.level-danger {
  border-left-color: var(--danger);
  background: linear-gradient(var(--danger-bg), var(--danger-bg)), var(--surface);
}

.verdict-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
}

.verdict-text {
  margin: 10px 0 14px;
  font-size: 1.05rem;
  font-weight: 600;
}

.badge,
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border-radius: 999px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
}

.badge {
  padding: 6px 14px;
  font-size: 1.05rem;
}

.chip {
  padding: 2px 10px;
  font-size: 0.8rem;
}

.chip-sm {
  padding: 0 6px;
  margin-left: 4px;
}

.badge-safe {
  background: var(--safe);
}

.badge-caution {
  background: var(--caution);
}

.badge-tight {
  background: var(--tight);
}

.badge-danger {
  background: var(--danger);
}

@media (prefers-color-scheme: dark) {
  .badge,
  .chip {
    color: #0f1216;
  }
}

/* ===== 提醒 ===== */
.warnings {
  display: grid;
  gap: 8px;
}

.alert {
  display: flex;
  gap: 10px;
  margin: 0;
  padding: 10px 14px;
  border-radius: 10px;
  border: 1px solid;
}

.alert > span:first-child {
  flex: none;
  font-weight: 700;
}

.alert-warn {
  background: var(--warn-bg);
  border-color: var(--warn);
}

.alert-warn > span:first-child {
  color: var(--warn);
}

.alert-danger {
  background: var(--danger-bg);
  border-color: var(--danger);
  border-left-width: 5px;
  font-weight: 600;
}

.alert-danger > span:first-child {
  color: var(--danger);
}

/* ===== 指標卡 ===== */
.kpis {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 10px;
}

.kpi {
  display: grid;
  gap: 2px;
  align-content: start;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--surface-2);
  min-width: 0;
}

.kpi-label {
  font-size: 0.8rem;
  color: var(--text-3);
}

.kpi-value {
  font-size: 1.1rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.kpi-sub {
  font-size: 0.76rem;
  color: var(--text-3);
}

.kpi-strong .kpi-value {
  font-size: 1.3rem;
}

.verdict .kpi {
  background: var(--surface);
  border: 1px solid var(--border);
}

/* ===== 與定期定額比較 ===== */
.dca-headline {
  margin: 10px 0 4px;
  font-size: 1.15rem;
  font-weight: 700;
}

.dca-threshold {
  margin: 0 0 14px;
  color: var(--text-2);
  font-weight: 600;
}

.dca-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

@media (min-width: 1500px) {
  .dca-body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }
}

/* ===== 圖表 ===== */
.charts {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 420px), 1fr));
  gap: 16px;
}

.chart {
  margin: 0;
  min-width: 0;
}

.chart:first-child {
  grid-column: 1 / -1;
}

.chart figcaption {
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--text-2);
  margin-bottom: 6px;
}

.chart-box {
  position: relative;
  height: 260px;
}

/* ===== 表格 ===== */
.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: 10px;
}

.table-scroll {
  max-height: 560px;
  overflow: auto;
}

.table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
  font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
}

.table th,
.table td {
  padding: 7px 10px;
  text-align: right;
  white-space: nowrap;
  border-bottom: 1px solid var(--border);
}

.table thead th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: var(--surface-2);
  color: var(--text-2);
  font-weight: 600;
}

.table tbody tr:last-child th,
.table tbody tr:last-child td {
  border-bottom: 0;
}

.table th:first-child,
.table td:first-child {
  text-align: left;
}

.table tbody th {
  font-weight: 600;
  background: var(--surface);
}

.table-flow tbody th,
.table-flow thead th:first-child {
  position: sticky;
  left: 0;
}

.table-flow thead th:first-child {
  z-index: 3;
}

.table-flow tbody th {
  z-index: 1;
}

.tag {
  display: inline-block;
  margin-left: 6px;
  padding: 0 6px;
  border-radius: 6px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
}

.row-danger td,
.row-danger th {
  background: linear-gradient(var(--danger-bg), var(--danger-bg)), var(--surface);
}

.table-compare td.is-best {
  outline: 2px solid var(--accent);
  outline-offset: -3px;
  font-weight: 700;
}

.compare-picks {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  margin-bottom: 12px;
}

/* ===== 假設說明 ===== */
.assumptions ul {
  margin: 12px 0 0;
  padding-left: 1.2em;
  color: var(--text-2);
  font-size: 0.88rem;
}

.assumptions li + li {
  margin-top: 6px;
}

/* ===== 手機 ===== */
@media (max-width: 600px) {
  body {
    font-size: 14px;
  }

  .btn,
  .segmented button {
    min-height: 40px;
  }

  .plan-select {
    width: 100%;
  }

  .plan-bar,
  .plan-bar-row {
    width: 100%;
  }

  .card {
    padding: 14px;
  }

  .kpis {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .badge {
    font-size: 0.95rem;
  }

  .chart-box {
    height: 220px;
  }
}