/* ===========================================================================
   Theme — Report 2026-08, "One Source, Two Signs"

   Aesthetic: duotone magazine. The palette is built from exactly two
   saturated hues in tension — a warm red-orange for warming and a deep teal
   for cooling — because the report's subject is two effects of opposite
   sign from one source. The masthead is a full-bleed field split between
   them, the first colour-field masthead in the series.

   Two other firsts here: body copy is set in a serif (every earlier report
   uses a sans for text), and the pull quote is an inverted colour panel.

   Loaded after report.css: tokens first (which also re-colours every chart,
   since report.js reads the palette from them), then the rules that assume
   the default surface.
   =========================================================================== */

:root {
  --bg: #faf9f7;
  --bg-card: #ffffff;
  --bg-accent: #eaf0f1;
  --bg-dark: #103f4b;
  --bg-dark-2: #0b2f38;

  --text: #1a1a1a;
  --text-secondary: #3d4145;
  --text-muted: #6f7478;
  --text-inverse: #f6f2ec;

  --primary: #134e5e;
  --primary-light: #1d7086;
  --accent: #c2410c;
  --accent-light: #e2662b;

  --border: #d7d9d6;
  --border-light: #e6e8e5;
  --rule: #b8bcb8;

  --chart-blue: #134e5e;
  --chart-blue-light: #6fa3b2;
  --chart-gold: #b07c14;
  --chart-red: #c2410c;
  --chart-teal: #17796f;
  --chart-gray: #8a8f92;
  --chart-orange: #e2662b;
  --chart-purple: #5c4b7d;

  --serif: "Libre Franklin", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --sans: Lora, Georgia, "Times New Roman", serif;
  --mono: "Fira Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;

  --max-width: 950px;

  /* The two-sign split, reused by the masthead and the pull quote. */
  --split: linear-gradient(100deg, #b3391a 0%, #b3391a 46%, #134e5e 46%, #134e5e 100%);
}

/* Body copy is a serif here, which needs a touch more size and leading than
   the sans stacks the other reports use. --serif/--sans are deliberately
   inverted above so the shared shell picks up the right face in each slot. */
body { font-size: 1.02rem; line-height: 1.74; }

::selection { background: rgba(194, 65, 12, 0.18); }
:where(a, button, [tabindex]):focus-visible { outline-color: var(--accent); }

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

.progress__bar { background: var(--accent); }
.skip-link { background: var(--accent); }

/* --- masthead: a full-bleed field, split warm and cool -------------------- */

.masthead {
  background: var(--split);
  color: var(--text-inverse);
  border-bottom: 0;
  padding: 3rem var(--gutter) 3rem;
}
.masthead .overline {
  color: rgba(246, 242, 236, 0.88);
  font-weight: 500;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  margin-bottom: 1.3rem;
}
.masthead h1 {
  font-family: var(--serif);
  color: #fff;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.03;
  max-width: 19ch;
  font-size: clamp(2.1rem, 5.6vw, 3.2rem);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.18);
}
.masthead .subtitle {
  color: rgba(246, 242, 236, 0.9);
  font-weight: 400;
  max-width: 58ch;
}
.masthead .strapline {
  border-left: 3px solid rgba(246, 242, 236, 0.55);
  color: rgba(246, 242, 236, 0.9);
  font-family: var(--sans);
  font-style: italic;
  font-size: 1rem;
}
.masthead .meta-row {
  border-top: 1px solid rgba(246, 242, 236, 0.3);
  font-family: var(--mono);
  font-size: 0.74rem;
  color: rgba(246, 242, 236, 0.86);
  gap: 1.1rem 2.6rem;
}
.masthead .meta-row strong {
  color: #fff;
  font-family: var(--serif);
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.14em;
}

/* --- sticky nav: part of the page, not a band ----------------------------- */

.sticky-nav {
  background: rgba(250, 249, 247, 0.96);
  border-top: 3px solid var(--accent);
  border-bottom: 1px solid var(--border);
}
.nav-inner a {
  color: var(--text-muted);
  font-family: var(--serif);
  font-size: 0.79rem;
  font-weight: 600;
}
.nav-inner a:hover { color: var(--primary); }
.nav-inner a.is-active { color: var(--accent); border-bottom-color: var(--accent); }

/* --- section headings: a short heavy rule beneath ------------------------- */

section > h2 {
  font-family: var(--serif);
  color: var(--primary);
  font-weight: 800;
  letter-spacing: -0.025em;
  border-bottom: 0;
  padding-bottom: 0.7rem;
  position: relative;
}
section > h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 88px;
  height: 6px;
  background: var(--accent);
}
/* The tick marks body-section headings only. The generated abstract and
   metadata blocks are also <section>s, and their mono labels collide with it. */
.abstract h2::after,
.endmatter h2::after { content: none; }

section > .section-dek {
  font-style: italic;
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 0.9rem;
  max-width: 64ch;
}
section > h3 {
  font-family: var(--serif);
  font-weight: 700;
  font-size: 1.16rem;
  letter-spacing: -0.015em;
  color: var(--primary);
  margin: 2.4rem 0 0.7rem;
}
section > h4 { color: var(--accent); font-family: var(--mono); font-size: 0.8rem; }

.section-rule { border-top: 1px solid var(--rule); margin: 3.2rem 0 3.4rem; }

/* --- abstract -------------------------------------------------------------- */

.abstract {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 5px solid var(--primary);
}
.abstract h2 { color: var(--accent); font-family: var(--serif); font-weight: 700; }

/* --- statistics: warm cap, cool numeral ----------------------------------- */

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 1px solid var(--border);
  border-top: 5px solid var(--accent);
  padding: 1.15rem 1.25rem 1.1rem;
}
.stat-card .stat-value {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.9rem;
  letter-spacing: -0.03em;
  color: var(--primary);
}
.stat-card .stat-label { color: var(--text-secondary); font-size: 0.79rem; }

/* --- executive cards ------------------------------------------------------- */

.exec-card { background: var(--bg-card); border: 1px solid var(--border); padding: 1.4rem; }
.exec-card .exec-num {
  font-family: var(--mono);
  font-size: 0.67rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--accent);
  line-height: 1;
}
.exec-card .exec-title {
  font-family: var(--serif);
  font-weight: 800;
  font-size: 1.13rem;
  letter-spacing: -0.02em;
  color: var(--primary);
  margin: 0.7rem 0 0.5rem;
}

/* --- charts ---------------------------------------------------------------- */

.chart-container { background: var(--bg-card); border: 1px solid var(--border); padding: 1.25rem 1.35rem; }
.chart-container .chart-label {
  color: var(--accent);
  font-weight: 500;
  letter-spacing: 0.1em;
  padding-bottom: 0.7rem;
  border-bottom: 1px solid var(--border-light);
}
.chart-container .chart-caption {
  font-style: normal;
  border-top: 1px solid var(--border-light);
  color: var(--text-muted);
}
.schematic-wrap { background: var(--bg-card); }

/* --- pull quote: an inverted colour panel --------------------------------- */

.pull-quote {
  background: var(--primary);
  border: 0;
  padding: 1.9rem 2rem;
  margin: 3rem 0;
  font-family: var(--serif);
  font-style: normal;
  font-weight: 700;
  font-size: clamp(1.22rem, 2.9vw, 1.62rem);
  line-height: 1.26;
  letter-spacing: -0.02em;
  color: #fff;
  max-width: none;
}
.pull-quote .attribution {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: rgba(246, 242, 236, 0.78);
  margin-top: 1rem;
  font-weight: 400;
}

/* --- callouts: cool tint, warm bar ---------------------------------------- */

.callout {
  background: var(--bg-accent);
  border: 0;
  border-left: 5px solid var(--accent);
  padding: 1.3rem 1.5rem;
}
.callout .callout-title { color: var(--accent); font-weight: 500; }
.callout strong { color: var(--primary); }
.callout--warn { border-left-color: var(--primary); }
.callout--warn .callout-title { color: var(--primary); }

/* --- tables ---------------------------------------------------------------- */

.data-table thead { background: var(--primary); color: #fff; }
.data-table thead th { font-family: var(--mono); letter-spacing: 0.05em; }
.data-table tbody tr:nth-child(even) { background: var(--bg-accent); }
.data-table tbody tr:hover { background: rgba(194, 65, 12, 0.07); }
.data-table tbody th { font-family: var(--serif); font-weight: 700; }
.table-caption { color: var(--accent); font-weight: 500; letter-spacing: 0.1em; }

.matrix thead th { background: var(--primary); color: #fff; }
.matrix tbody th { background: var(--bg-card); font-family: var(--serif); font-weight: 600; }
/* The matrix scale runs warm-to-cool because it grades two opposite signs. */
.matrix .lv0 { background: #ecefec; color: var(--text-muted); }
.matrix .lv1 { background: #f0c9b4; color: var(--text); }
.matrix .lv2 { background: #6fa3b2; }
.matrix .lv3 { background: #134e5e; }

/* --- references and end matter -------------------------------------------- */

.ref-list .ref-org { color: var(--accent); }
.endmatter h2 { color: var(--primary); font-family: var(--serif); border-bottom-color: var(--rule); }
.endmatter .kw {
  background: var(--bg-card);
  border-color: var(--border);
  font-family: var(--mono);
  font-size: 0.7rem;
}

/* --- footer ---------------------------------------------------------------- */

.report-footer { border-top: 6px solid var(--accent); }
.footer-inner h3 { color: #fff; font-family: var(--serif); font-weight: 800; letter-spacing: -0.02em; }
.cite-box { border-left-color: var(--accent); }

/* --- responsive ------------------------------------------------------------ */

@media (max-width: 760px) {
  /* A diagonal split reads as a smudge at phone width; stack it vertically. */
  :root { --split: linear-gradient(170deg, #b3391a 0%, #b3391a 45%, #134e5e 45%, #134e5e 100%); }
  .pull-quote { padding: 1.4rem 1.3rem; }
}

/* --- print ----------------------------------------------------------------- */

@media print {
  .masthead { background: #fff !important; color: #000 !important; }
  .masthead h1 { color: #000 !important; text-shadow: none; }
  .masthead .overline, .masthead .subtitle, .masthead .strapline,
  .masthead .meta-row, .masthead .meta-row strong { color: #333 !important; }
  .pull-quote { background: #fff !important; color: #000 !important; border-left: 4px solid #666; }
  .pull-quote .attribution { color: #555 !important; }
}