:root {
  --color-primary: #1e40af;
  --color-primary-strong: #17347f;
  --color-market: #0f766e;
  --color-ink: #172554;
  --color-text: #263553;
  --color-muted-text: #5f6f8c;
  --color-bg: #f5f7fb;
  --color-surface: #ffffff;
  --color-muted: #e9eef6;
  --color-border: #dbe3f2;
  --color-soft-blue: #edf4ff;
  --shadow: 0 20px 48px rgba(30, 58, 138, 0.09);
  --radius-lg: 24px;
  --radius-md: 16px;
  --content-width: 1380px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--color-text);
  background:
    radial-gradient(circle at 82% 4%, rgba(59, 130, 246, 0.09), transparent 28rem),
    var(--color-bg);
  font-family: "Fira Sans", "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;
  line-height: 1.6;
}

button,
input {
  font: inherit;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(30, 64, 175, 0.28);
  outline-offset: 3px;
}

button {
  min-height: 44px;
  cursor: pointer;
}

a {
  color: inherit;
}

.app-shell {
  min-height: 100vh;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  padding: 12px max(24px, calc((100vw - var(--content-width)) / 2));
  border-bottom: 1px solid rgba(219, 227, 242, 0.92);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border-radius: 13px;
  color: #fff;
  background: var(--color-primary);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.brand span:last-child {
  display: grid;
  line-height: 1.25;
}

.brand small {
  color: var(--color-muted-text);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.brand strong {
  color: var(--color-ink);
  font-size: 1rem;
}

.home-link,
.source-panel a {
  color: var(--color-primary);
  font-weight: 700;
  text-underline-offset: 4px;
}

main,
footer {
  width: min(calc(100% - 48px), var(--content-width));
  margin-inline: auto;
}

main {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 24px;
  padding: 44px 0 32px;
}

main > * {
  min-width: 0;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(300px, 0.7fr);
  gap: 32px;
  align-items: end;
  padding: 10px 0 18px;
}

.eyebrow {
  margin: 0 0 6px;
  color: var(--color-primary);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(2.2rem, 4.6vw, 4.8rem);
  line-height: 1.08;
  letter-spacing: -0.055em;
}

.hero-intro {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--color-muted-text);
  font-size: 1.04rem;
}

.source-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.status-dot {
  flex: 0 0 auto;
  width: 11px;
  height: 11px;
  margin-top: 8px;
  border: 3px solid #dcfce7;
  border-radius: 999px;
  background: #16a34a;
  box-shadow: 0 0 0 4px rgba(22, 163, 74, 0.1);
}

.source-card div {
  display: grid;
}

.source-card small,
.metric-card span,
.source-grid span {
  color: var(--color-muted-text);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.source-card strong {
  margin-top: 3px;
  color: var(--color-ink);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 1.05rem;
}

.source-card p {
  margin: 5px 0 0;
  color: var(--color-muted-text);
  font-size: 0.82rem;
}

.period-panel,
.chart-card,
.history-card,
.source-panel {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.period-panel,
.chart-card,
.history-card,
.source-panel {
  padding: 24px;
}

.section-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
}

.section-heading h2,
.source-panel h2 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
}

.compact-heading > p {
  max-width: 600px;
  margin: 2px 0 0;
  color: var(--color-muted-text);
  font-size: 0.86rem;
  text-align: right;
}

.period-buttons {
  display: grid;
  grid-template-columns: repeat(9, minmax(72px, 1fr));
  gap: 8px;
  margin-top: 18px;
}

.period-buttons button,
.history-actions button,
.pagination button,
.secondary-button {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-ink);
  background: #fff;
  font-weight: 750;
  transition: border-color 180ms ease, background-color 180ms ease, color 180ms ease, box-shadow 180ms ease;
}

.period-buttons button:hover,
.history-actions button:hover,
.pagination button:hover:not(:disabled),
.secondary-button:hover {
  border-color: #9bb3df;
  background: var(--color-soft-blue);
}

.period-buttons button.is-active {
  border-color: var(--color-primary);
  color: #fff;
  background: var(--color-primary);
  box-shadow: 0 8px 20px rgba(30, 64, 175, 0.22);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.metric-card {
  display: grid;
  min-height: 142px;
  align-content: center;
  padding: 22px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.metric-card strong {
  margin-top: 8px;
  color: var(--color-ink);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: clamp(1.65rem, 3vw, 2.35rem);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}

.metric-card:first-child {
  border-color: #b9ded9;
  background: linear-gradient(145deg, #fff, #edfdfa);
}

.metric-card:first-child strong,
td.market-value,
.chart-tooltip .tooltip-market {
  color: var(--color-market);
  font-weight: 700;
}

.metric-card small {
  margin-top: 10px;
  color: var(--color-muted-text);
}

.chart-heading {
  align-items: center;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--color-muted-text);
  font-size: 0.8rem;
  font-weight: 700;
}

.chart-legend span {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.legend-line {
  display: inline-block;
  width: 24px;
  height: 3px;
  border-radius: 999px;
  background: var(--color-market);
}

.market-line {
  background: var(--color-market);
}

.average-line {
  height: 0;
  border-top: 2px dashed #64748b;
  background: transparent;
}

.coverage-notice {
  margin-top: 18px;
  padding: 12px 14px;
  border: 1px solid #f1d094;
  border-radius: 12px;
  color: #7c4a04;
  background: #fff8e8;
  font-size: 0.85rem;
}

.chart-wrap {
  position: relative;
  height: clamp(360px, 48vw, 580px);
  margin-top: 20px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background:
    linear-gradient(to bottom, rgba(226, 232, 240, 0.45) 1px, transparent 1px) 0 0 / 100% 20%,
    linear-gradient(180deg, #fbfdff, #fff);
  overflow: hidden;
}

#rateChart {
  display: block;
  width: 100%;
  height: 100%;
}

.chart-tooltip {
  position: absolute;
  z-index: 3;
  min-width: 168px;
  padding: 10px 12px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  color: #fff;
  background: rgba(15, 23, 42, 0.92);
  box-shadow: 0 12px 32px rgba(15, 23, 42, 0.25);
  pointer-events: none;
  transform: translate(12px, -50%);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 0.76rem;
  line-height: 1.65;
}

.chart-tooltip strong,
.chart-tooltip span {
  display: block;
}

.chart-tooltip .tooltip-buy {
  color: #93c5fd;
}

.chart-tooltip .tooltip-sell {
  color: #fcd18a;
}

.chart-axis-note {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  color: var(--color-muted-text);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 0.72rem;
}

.history-heading {
  align-items: center;
}

.history-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px;
}

.history-actions input {
  min-height: 44px;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: 12px;
  color: var(--color-ink);
  background: #fff;
}

.history-actions button,
.pagination button,
.secondary-button {
  padding: 9px 14px;
}

.history-actions button:not(.secondary-button) {
  border-color: var(--color-primary);
  color: #fff;
  background: var(--color-primary);
}

.date-result {
  min-height: 1.6em;
  margin: 14px 0 0;
  color: var(--color-primary);
  font-size: 0.86rem;
  font-weight: 700;
}

.table-wrap {
  width: 100%;
  max-width: 100%;
  margin-top: 8px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-variant-numeric: tabular-nums;
}

th,
td {
  padding: 12px 18px;
  border-bottom: 1px solid var(--color-border);
  text-align: right;
  white-space: nowrap;
}

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

th {
  color: var(--color-muted-text);
  background: #f7f9fc;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
}

td {
  color: var(--color-text);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 0.82rem;
}

tbody tr:last-child td {
  border-bottom: 0;
}

tbody tr:hover,
tbody tr.is-located {
  background: var(--color-soft-blue);
}

td.positive-value {
  color: #9a4e02;
}

td.negative-value {
  color: var(--color-market);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-top: 16px;
}

.pagination p {
  margin: 0;
  color: var(--color-muted-text);
  font-size: 0.82rem;
}

.pagination > div {
  display: flex;
  align-items: center;
  gap: 10px;
}

.pagination button:disabled {
  cursor: not-allowed;
  opacity: 0.42;
}

.pagination span {
  min-width: 86px;
  color: var(--color-ink);
  font-family: "Fira Code", ui-monospace, monospace;
  font-size: 0.82rem;
  text-align: center;
}

.source-grid p {
  max-width: 820px;
  margin: 10px 0 0;
  color: var(--color-muted-text);
  font-size: 0.88rem;
}

.source-panel {
  display: grid;
  grid-template-columns: minmax(220px, 0.45fr) minmax(0, 1.55fr);
  gap: 32px;
}

.source-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.source-grid article {
  display: grid;
  align-content: start;
  padding: 18px;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: #fbfcfe;
}

.source-grid strong {
  margin-top: 7px;
  color: var(--color-ink);
  font-size: 0.92rem;
  line-height: 1.5;
}

.source-grid a {
  margin-top: 10px;
  font-size: 0.82rem;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 0 40px;
  color: var(--color-muted-text);
  font-size: 0.78rem;
}

footer p {
  margin: 0;
}

footer a {
  color: var(--color-primary);
  font-weight: 700;
}

.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;
}

[hidden] {
  display: none !important;
}

@media (max-width: 1024px) {
  .period-buttons {
    grid-template-columns: repeat(5, 1fr);
  }

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

  .source-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar {
    min-height: 68px;
    padding-inline: 16px;
  }

  .brand small,
  .home-link {
    display: none;
  }

  .brand-mark {
    width: 40px;
    height: 40px;
  }

  main,
  footer {
    width: min(calc(100% - 28px), var(--content-width));
  }

  main {
    gap: 16px;
    padding-top: 28px;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero h1 {
    font-size: clamp(2rem, 11vw, 3.2rem);
  }

  .hero h1 br {
    display: none;
  }

  .section-heading {
    flex-direction: column;
  }

  .period-panel,
  .chart-card,
  .history-card,
  .source-panel {
    padding: 18px;
    border-radius: 18px;
  }

  .section-heading,
  .source-panel {
    align-items: stretch;
  }

  .section-heading {
    display: grid;
    gap: 14px;
  }

  .compact-heading > p {
    text-align: left;
  }

  .period-buttons {
    grid-template-columns: repeat(3, 1fr);
  }

  .metric-grid {
    gap: 10px;
  }

  .metric-card {
    min-height: 128px;
    padding: 17px;
  }

  .metric-card strong {
    font-size: clamp(1.45rem, 8vw, 2rem);
  }

  .chart-heading,
  .history-heading {
    align-items: start;
  }

  .chart-wrap {
    height: 380px;
  }

  .chart-legend {
    gap: 10px;
  }

  .history-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    justify-content: stretch;
  }

  .history-actions label,
  .history-actions input,
  .history-actions .secondary-button {
    width: 100%;
  }

  .history-actions .secondary-button {
    grid-column: 1 / -1;
  }

  th,
  td {
    padding: 11px 14px;
  }

  .pagination {
    align-items: stretch;
    flex-direction: column;
  }

  .pagination > div {
    justify-content: space-between;
  }

  .source-grid {
    grid-template-columns: 1fr;
  }

  footer {
    flex-direction: column;
  }
}

@media (max-width: 430px) {
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .chart-axis-note span:nth-child(2) {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}