/* Pulse — site-wide stylesheet.
   Institutional / editorial: sober palette, serif headings, sans body,
   subtle elevation. Reference: FT, Bloomberg Terminal-but-on-the-web,
   FRED with a 2026 typography pass. */

:root {
  --bg: #fbfaf7;            /* warm off-white */
  --bg-soft: #f4f1ea;       /* paper-ish secondary */
  --surface: #ffffff;       /* cards stay clean white for contrast */
  --surface-alt: #f3f0e9;
  --text: #1a1a1a;          /* warmer near-black */
  --text-dim: #4a4a48;
  --text-muted: #75736d;
  --border: #e6e1d4;        /* warm hairline */
  --border-strong: #c9c2b1;
  --accent: #14213d;        /* confident navy */
  --accent-hover: #08152e;
  --accent-soft: #eef1f7;
  --status-green: #0f766e;  /* deeper teal-green than the lime default */
  --status-yellow: #b45309;
  --status-red: #b91c1c;
  --container: 1240px;
  --gap-1: 4px;
  --gap-2: 8px;
  --gap-3: 12px;
  --gap-4: 16px;
  --gap-6: 24px;
  --gap-8: 32px;
  --gap-12: 56px;
  --gap-16: 80px;
  --shadow-sm: 0 1px 2px rgba(20, 33, 61, 0.04), 0 0 0 1px rgba(20, 33, 61, 0.04);
  --shadow-md: 0 2px 8px rgba(20, 33, 61, 0.06), 0 0 0 1px rgba(20, 33, 61, 0.04);
  --font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-serif: "Source Serif 4", "Source Serif Pro", Charter, "Iowan Old Style", "Palatino", Cambria, Georgia, serif;
  --font-mono: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: "ss01", "cv11";   /* Inter — single-storey a, refined alts */
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--accent-hover); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }

h1, h2, h3 {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--text);
  margin: 0 0 var(--gap-4);
  letter-spacing: -0.015em;
  font-feature-settings: "kern", "liga", "onum";
}
h1 { font-size: 44px; line-height: 1.1; letter-spacing: -0.025em; }
h2 { font-size: 28px; line-height: 1.2; margin-top: var(--gap-12); font-weight: 600; }
h3 { font-size: 19px; line-height: 1.3; margin-top: var(--gap-8); font-weight: 600; }
h4, h5, h6 {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--text-muted);
  margin: 0 0 var(--gap-3);
}
h4 { font-size: 13px; text-transform: uppercase; letter-spacing: 0.08em; margin-top: var(--gap-6); }
h5, h6 { font-size: 12px; text-transform: uppercase; letter-spacing: 0.08em; }
p  { margin: 0 0 var(--gap-4); }

.num, .tabular,
table td, table th {
  font-variant-numeric: tabular-nums;
}

code, pre, .mono {
  font-family: "JetBrains Mono", "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
}
code { background: var(--surface-alt); padding: 1px 5px; border-radius: 3px; }
pre  { background: var(--surface-alt); border: 1px solid var(--border); border-radius: 4px;
       padding: var(--gap-4); overflow-x: auto; line-height: 1.5; }

/* Layout ------------------------------------------------------------ */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gap-6);
}

main {
  flex: 1;
  padding: var(--gap-16) 0;
}

/* Header ------------------------------------------------------------ */

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgba(251, 250, 247, 0.92);
  backdrop-filter: saturate(150%) blur(8px);
  -webkit-backdrop-filter: saturate(150%) blur(8px);
  position: sticky;
  top: 0;
  z-index: 50;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text);
  font-feature-settings: "ss01";
}
.brand:hover { text-decoration: none; color: var(--text); }

.site-nav {
  display: flex;
  gap: var(--gap-8);
  font-size: 14px;
}
.site-nav a {
  color: var(--text-dim);
  padding: 4px 0;
  position: relative;
  font-weight: 500;
}
.site-nav a:hover { color: var(--text); text-decoration: none; }
.site-nav a.active { color: var(--text); }
.site-nav a.active::after {
  content: "";
  position: absolute;
  left: 0; right: 0;
  bottom: -22px;
  height: 2px;
  background: var(--accent);
}

@media (max-width: 720px) {
  .site-header .container { flex-direction: column; height: auto; padding: var(--gap-3) var(--gap-6); gap: var(--gap-2); }
  .site-nav { gap: var(--gap-4); flex-wrap: wrap; justify-content: center; }
}

/* Footer ------------------------------------------------------------ */

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: var(--gap-8) 0 var(--gap-6);
  font-size: 13px;
  color: var(--text-dim);
}
.site-footer .container {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--gap-8);
}
.site-footer h5 {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin: 0 0 var(--gap-3);
  font-weight: 600;
}
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin: 0 0 var(--gap-2); }
.site-footer a { color: var(--text-dim); }
.site-footer a:hover { color: var(--text); }
.site-footer .footer-line {
  grid-column: 1 / -1;
  border-top: 1px solid var(--border);
  margin-top: var(--gap-6);
  padding-top: var(--gap-4);
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 720px) {
  .site-footer .container { grid-template-columns: 1fr 1fr; }
}

/* Cards & blocks ---------------------------------------------------- */

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: var(--gap-8);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.18s, transform 0.18s, border-color 0.18s;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--gap-6);
}

.intro {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 720px;
}

.callout {
  background: var(--accent-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 4px 4px 0;
  padding: var(--gap-4) var(--gap-6);
  margin: var(--gap-6) 0;
  font-size: 14px;
}

/* Hero / homepage --------------------------------------------------- */

.hero {
  border-bottom: 1px solid var(--border);
  padding: var(--gap-12) 0 var(--gap-12);
  margin-bottom: var(--gap-12);
}
.hero h1 {
  font-size: 80px;
  font-weight: 600;
  margin: 0 0 var(--gap-4);
  letter-spacing: -0.045em;
  line-height: 0.95;
}
.hero .tagline {
  font-family: var(--font-serif);
  font-size: 22px;
  font-style: italic;
  font-weight: 400;
  color: var(--text-dim);
  max-width: 640px;
  margin: 0;
  line-height: 1.4;
  letter-spacing: -0.01em;
}

@media (max-width: 720px) {
  .hero h1 { font-size: 56px; }
  .hero .tagline { font-size: 19px; }
}

/* Index value card -------------------------------------------------- */

.index-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: var(--gap-8);
  display: flex;
  flex-direction: column;
  gap: var(--gap-3);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.18s, transform 0.18s, border-color 0.18s;
}
a.index-card:hover {
  text-decoration: none;
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.index-card .label {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}
.index-card .value {
  font-family: var(--font-serif);
  font-size: 40px;
  font-weight: 500;
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.025em;
  color: var(--text);
  line-height: 1;
}
.index-card .meta {
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: var(--gap-3);
  flex-wrap: wrap;
  align-items: center;
}
.index-card a.see-more {
  font-size: 13px;
  font-weight: 500;
  margin-top: auto;
  color: var(--accent);
}

/* Tables ------------------------------------------------------------ */

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
thead th {
  background: var(--surface-alt);
  text-align: left;
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: var(--gap-3) var(--gap-4);
  border-bottom: 1px solid var(--border);
}
tbody td {
  padding: var(--gap-4);
  border-bottom: 1px solid var(--border);
  color: var(--text);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr { transition: background 0.12s; }
tbody tr:hover { background: var(--bg-soft); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums lining-nums; }

/* Status indicator -------------------------------------------------- */

.status {
  display: inline-flex;
  align-items: center;
  gap: var(--gap-2);
  font-size: 13px;
  font-weight: 500;
}
.status::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--status-green);
  display: inline-block;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.12);
}
.status.warn::before  { background: var(--status-yellow); box-shadow: 0 0 0 3px rgba(180, 83, 9, 0.12); }
.status.error::before { background: var(--status-red);    box-shadow: 0 0 0 3px rgba(185, 28, 28, 0.12); }
.status.unknown::before { background: var(--text-muted);  box-shadow: 0 0 0 3px rgba(117, 115, 109, 0.12); }

/* Version badge ----------------------------------------------------- */

.version-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 99px;
  color: var(--text-dim);
  background: var(--surface);
  letter-spacing: 0;
  transition: color 0.15s, border-color 0.15s, background 0.15s;
}
.version-badge:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-soft); text-decoration: none; }

/* Buttons / link buttons ------------------------------------------- */

.btn {
  display: inline-block;
  font-size: 14px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: 6px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s, background 0.15s, box-shadow 0.15s;
  text-decoration: none;
}
.btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
  box-shadow: var(--shadow-sm);
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.btn-primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: #fff; }

.button-row {
  display: flex;
  gap: var(--gap-3);
  flex-wrap: wrap;
  margin: var(--gap-4) 0;
}

/* Page header (title + lede) ---------------------------------------- */

.page-header {
  margin-bottom: var(--gap-12);
}
.page-header h1 { margin-bottom: var(--gap-4); font-size: 48px; line-height: 1.05; letter-spacing: -0.03em; }
.page-header .lede { font-family: var(--font-serif); font-size: 21px; font-style: italic; font-weight: 400; color: var(--text-dim); max-width: 720px; line-height: 1.45; letter-spacing: -0.005em; }

@media (max-width: 720px) {
  .page-header h1 { font-size: 36px; }
  .page-header .lede { font-size: 18px; }
}

/* Stub-page note ---------------------------------------------------- */

.stub-note {
  margin-top: var(--gap-6);
  padding: var(--gap-4) var(--gap-6);
  border: 1px dashed var(--border-strong);
  border-radius: 4px;
  font-size: 13px;
  color: var(--text-muted);
  background: var(--bg-soft);
}
.stub-note strong { color: var(--text-dim); }

/* Time-series chart ------------------------------------------------- */

.chart-block {
  margin: var(--gap-8) 0 var(--gap-12);
  position: relative;
}
.chart-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-4);
  margin-bottom: var(--gap-3);
  flex-wrap: wrap;
}
.chart-title {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}
.chart-ranges {
  display: inline-flex;
  gap: 2px;
  background: var(--surface-alt);
  padding: 3px;
  border-radius: 999px;
}
.chart-ranges button {
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 500;
  padding: 5px 12px;
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--text-muted);
  border-radius: 999px;
  transition: color 0.15s, background 0.15s, box-shadow 0.15s;
}
.chart-ranges button:hover { color: var(--text); }
.chart-ranges button.is-active {
  background: var(--surface);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.chart-canvas {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: var(--shadow-sm);
  padding: var(--gap-4) 0 var(--gap-2);
}
.chart-canvas svg {
  display: block;
  width: 100%;
  height: 320px;
}
.chart-tooltip {
  position: absolute;
  background: var(--text);
  color: #fff;
  padding: 10px 14px;
  border-radius: 6px;
  pointer-events: none;
  white-space: nowrap;
  z-index: 10;
  box-shadow: 0 4px 14px rgba(20, 33, 61, 0.18);
  min-width: 180px;
}
.chart-tooltip__date  { font-size: 11px; color: rgba(255,255,255,0.6); margin-bottom: 4px; letter-spacing: 0.02em; }
.chart-tooltip__value { font-family: var(--font-serif); font-size: 22px; font-weight: 500; font-variant-numeric: tabular-nums lining-nums; line-height: 1.1; }
.chart-tooltip__range { font-size: 11px; color: rgba(255,255,255,0.7); margin-top: 6px; font-variant-numeric: tabular-nums; }
.chart-tooltip__meta  { font-size: 11px; color: rgba(255,255,255,0.55); margin-top: 4px; }
.chart-legend {
  display: flex;
  gap: var(--gap-4);
  font-size: 12px;
  color: var(--text-muted);
  margin-top: var(--gap-3);
  align-items: center;
  flex-wrap: wrap;
}
.chart-legend__swatch {
  display: inline-block;
  width: 12px;
  height: 12px;
  margin-right: 6px;
  vertical-align: -2px;
  border-radius: 2px;
}
.chart-legend__swatch--line { height: 2px; background: var(--accent); margin-bottom: 5px; }
.chart-legend__swatch--band { background: var(--accent); opacity: 0.16; }
.chart-legend__swatch--dot  { background: var(--accent); opacity: 0.22; border-radius: 50%; width: 8px; height: 8px; }

/* Newsletter form --------------------------------------------------- */

.newsletter-status {
  padding: var(--gap-2) var(--gap-3);
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
}
.newsletter-status[data-kind="ok"]   { border-color: var(--status-green); background: #ecfdf5; color: #065f46; }
.newsletter-status[data-kind="warn"] { border-color: var(--status-yellow); background: #fef3c7; color: #92400e; }
.newsletter-status[data-kind="info"] { border-color: var(--accent); background: var(--accent-soft); color: var(--accent); }

/* Freshness warning (stale value) ----------------------------------- */

.freshness-warning {
  margin-top: var(--gap-3);
  font-size: 13px;
  color: #92400e;
  background: #fef3c7;
  border: 1px solid #fde68a;
  border-radius: 4px;
  padding: var(--gap-2) var(--gap-3);
}
.freshness-warning::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--status-yellow);
  border-radius: 50%;
  margin-right: var(--gap-2);
  vertical-align: middle;
}
.freshness-warning[data-severity="error"] {
  color: #991b1b;
  background: #fee2e2;
  border-color: #fecaca;
}
.freshness-warning[data-severity="error"]::before { background: var(--status-red); }

/* Citation widget --------------------------------------------------- */

.pulse-citation {
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--surface);
  margin: var(--gap-4) 0;
}
.pulse-citation:not(.pulse-citation--ready) { padding: var(--gap-4); color: var(--text-muted); font-size: 13px; }
.pulse-citation__tabs {
  display: flex;
  border-bottom: 1px solid var(--border);
  background: var(--surface-alt);
}
.pulse-citation__tab {
  background: none;
  border: none;
  border-right: 1px solid var(--border);
  border-bottom: 2px solid transparent;
  font: inherit;
  font-size: 13px;
  color: var(--text-dim);
  padding: var(--gap-3) var(--gap-4);
  cursor: pointer;
  transition: color 0.15s, border-color 0.15s;
}
.pulse-citation__tab:hover { color: var(--text); }
.pulse-citation__tab.is-active {
  color: var(--text);
  background: var(--surface);
  border-bottom-color: var(--accent);
}
.pulse-citation__panel { padding: var(--gap-4); }
.pulse-citation__text {
  margin: 0 0 var(--gap-3);
  background: var(--bg-soft);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: var(--gap-3) var(--gap-4);
  font-size: 13px;
  line-height: 1.5;
  white-space: pre-wrap;
  overflow-x: auto;
}
.pulse-citation__copy { font-size: 13px; padding: 6px 12px; }

/* Lists ------------------------------------------------------------- */

ul.plain { list-style: none; padding: 0; margin: 0 0 var(--gap-4); }
ul.plain li { padding: var(--gap-2) 0; border-bottom: 1px solid var(--border); }
ul.plain li:last-child { border-bottom: none; }