:root {
  --bg: #f2f3f5;
  --card: #ffffff;
  --text: #111111;
  --muted: #444444;
  --faint: #666666;
  --line: #d6d9df;
  --accent: #7A2C3E;
  --accent-soft: #f4e8eb;
  --grid: #e8eaee;
  --max: 860px;
  --radius: 14px;
}

html { color-scheme: light; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 44px 18px 80px;
}

header {
  border-bottom: 1px solid var(--line);
  padding-bottom: 18px;
  margin-bottom: 26px;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.brand-link {
  display: inline-flex;
  color: var(--text);
}

.brand-link:hover { color: var(--accent); text-decoration: none; }

.brand-mark {
  width: 36px;
  height: 36px;
  display: block;
}

.brand-row .site { margin: 0; }

.site {
  font-size: 13px;
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: .18em;
}

h1 {
  margin: 8px 0 0;
  font-size: clamp(26px, 3.3vw, 36px);
  font-weight: 650;
}

.subtitle {
  margin-top: 10px;
  color: var(--muted);
  max-width: 58ch;
  font-size: 15px;
}

nav {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

nav a {
  border: 1px solid var(--line);
  background: #fafafa;
  padding: 8px 10px;
  border-radius: 10px;
  font-size: 13px;
  color: var(--muted);
}

nav a:hover { border-color: var(--accent); }

main section {
  margin-top: 22px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

h2 {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 650;
}

p {
  margin: 0 0 12px;
  color: var(--muted);
}

ul {
  margin: 10px 0 14px 18px;
  color: var(--muted);
}

li { margin: 8px 0; }

footer {
  margin-top: 32px;
  border-top: 1px solid var(--line);
  padding-top: 16px;
  color: var(--faint);
  font-size: 13px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}

/* Headline metrics strip */

.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.metric {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.metric-label {
  font-size: 11px;
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.metric-value {
  font-size: 22px;
  font-weight: 650;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.metric-delta {
  margin-top: 4px;
  font-size: 12px;
  color: var(--faint);
  font-variant-numeric: tabular-nums;
}

.metric-delta.up { color: #1a6f3a; }
.metric-delta.down { color: #8a1f1f; }

/* Yield curve chart */

.chart-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  margin-top: 14px;
}

.chart-meta {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--faint);
  margin-bottom: 8px;
}

.chart-meta strong { color: var(--text); font-weight: 650; }

#curve-chart {
  width: 100%;
  height: auto;
  display: block;
}

#curve-chart .axis { stroke: var(--line); stroke-width: 1; }
#curve-chart .grid { stroke: var(--grid); stroke-width: 1; }
#curve-chart .tick { fill: var(--faint); font-size: 11px; }
#curve-chart .curve {
  fill: none;
  stroke: var(--accent);
  stroke-width: 2;
  stroke-linejoin: round;
  stroke-linecap: round;
}
#curve-chart .point { fill: var(--accent); }
#curve-chart .point-label {
  fill: var(--text);
  font-size: 10px;
  font-variant-numeric: tabular-nums;
}

.chart-empty {
  color: var(--faint);
  font-size: 14px;
  text-align: center;
  padding: 60px 0;
}

/* Source / attribution block */

.sources {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 14px 18px;
  margin-top: 14px;
  font-size: 13px;
  color: var(--muted);
}

.sources dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: 6px 16px;
  margin: 0;
}

.sources dt {
  color: var(--faint);
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
}

.sources dd { margin: 0; }

/* Contact form */

form {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  max-width: 520px;
}

label {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--muted);
}

input, textarea {
  width: 100%;
  box-sizing: border-box;
  padding: 10px;
  margin-top: 6px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

textarea { min-height: 120px; resize: vertical; }

button {
  margin-top: 14px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  background: #fafafa;
  border-radius: 10px;
  font-size: 14px;
  color: var(--muted);
  cursor: pointer;
}

button:hover { border-color: var(--accent); }

/* Data tables (treasuries, auctions) */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  align-items: center;
  margin-top: 12px;
  font-size: 13px;
  color: var(--muted);
}

.toolbar label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin: 0;
  cursor: pointer;
}

.toolbar input[type="checkbox"] {
  width: auto;
  margin: 0;
}

.toolbar input[type="text"] {
  width: 160px;
  padding: 6px 8px;
  margin: 0;
  font-size: 13px;
}

.row-count {
  color: var(--faint);
  font-size: 12px;
  letter-spacing: .04em;
}

.table-wrap {
  margin-top: 14px;
  overflow-x: auto;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}

table.data thead th {
  position: sticky;
  top: 0;
  background: #fafafa;
  text-align: left;
  border-bottom: 1px solid var(--line);
  padding: 9px 10px;
  font-size: 11px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--faint);
  font-weight: 650;
  white-space: nowrap;
  cursor: pointer;
  user-select: none;
}

table.data thead th:hover { color: var(--accent); }

table.data thead th.sorted-asc::after  { content: ' ▴'; color: var(--accent); }
table.data thead th.sorted-desc::after { content: ' ▾'; color: var(--accent); }

table.data tbody td {
  padding: 7px 10px;
  border-top: 1px solid var(--line);
  color: var(--text);
  white-space: nowrap;
}

table.data tbody td.num {
  text-align: right;
  font-variant-numeric: tabular-nums;
}

table.data tbody td.muted { color: var(--faint); }

table.data tbody tr.otr {
  background: var(--accent-soft);
}

table.data tbody tr.otr td:first-child::before {
  content: '★ ';
  color: var(--accent);
}

.section-title-row {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
}

.section-title-row h2 { margin: 0; }

.section-title-row .meta-stamp {
  font-size: 12px;
  color: var(--faint);
}

.bucket-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.bucket {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
}

.bucket-label {
  font-size: 11px;
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.bucket-value {
  font-size: 18px;
  font-weight: 650;
  margin-top: 4px;
  font-variant-numeric: tabular-nums;
}

.bucket-detail {
  margin-top: 4px;
  font-size: 12px;
  color: var(--faint);
}

@media print {
  nav { display: none !important; }
}