/* =====================================================================
   Lightning GFD Report — Editorial Luxury design system
   Vibe: warm cream paper, variable serif headings, soft diffused shadows
   Layout: editorial split + asymmetric bento
   ===================================================================== */

:root {
  --paper:      #FDFBF7;
  --cream:      #F5F0E6;
  --cream-dark: #ECE4D3;
  --espresso:   #1B1612;
  --espresso-2: #2E261F;
  --ink:        #2E261F;
  --muted:      #6B6157;
  --sage:       #8FA38E;
  --sage-deep:  #4F6450;
  --accent:     #B8854F;     /* warm bronze for highlights */
  --bolt:       #C9A24A;
  --line:       rgba(46,38,31,0.08);
  --line-2:     rgba(46,38,31,0.14);
  --shadow-sm:  0 1px 2px rgba(46,38,31,0.04), 0 2px 8px rgba(46,38,31,0.04);
  --shadow-md:  0 4px 16px rgba(46,38,31,0.06), 0 16px 48px rgba(46,38,31,0.06);
  --shadow-lg:  0 8px 32px rgba(46,38,31,0.08), 0 32px 96px rgba(46,38,31,0.08);

  --ease-spring: cubic-bezier(0.32, 0.72, 0, 1);
  --ease-soft:   cubic-bezier(0.22, 0.61, 0.36, 1);

  --serif:  "Fraunces", "Cormorant Garamond", Georgia, serif;
  --sans:   "Plus Jakarta Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:   "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --rad-lg: 2rem;
  --rad-md: 1.25rem;
  --rad-sm: 0.875rem;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-weight: 400;
  line-height: 1.6;
  font-size: 17px;
  letter-spacing: -0.005em;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ----- Paper grain overlay ----------------------------------------- */
.grain {
  position: fixed; inset: 0; z-index: 50;
  pointer-events: none;
  opacity: 0.035;
  background-image:
    url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.18  0 0 0 0 0.15  0 0 0 0 0.12  0 0 0 1 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
}

/* ----- Type ---------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 400;
  font-variation-settings: "opsz" 36, "SOFT" 30;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--espresso);
  margin: 0;
}
.display {
  font-size: clamp(2.6rem, 6.2vw, 5.6rem);
  font-variation-settings: "opsz" 144, "SOFT" 40;
  font-weight: 350;
  line-height: 0.98;
  letter-spacing: -0.03em;
}
.display em {
  font-style: italic;
  font-weight: 400;
  color: var(--accent);
}
.h2 {
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-variation-settings: "opsz" 96;
  letter-spacing: -0.025em;
  line-height: 1.05;
  max-width: 22ch;
  margin-bottom: 1.5rem;
}
.h2 em { font-style: italic; color: var(--accent); }
h3 { font-size: 1.45rem; line-height: 1.2; }
h4 { font-size: 1.15rem; line-height: 1.25; font-family: var(--sans); font-weight: 600; color: var(--espresso); letter-spacing: -0.01em; }

p { margin: 0 0 1rem; max-width: 65ch; color: var(--espresso-2); }
.lede {
  font-size: clamp(1.05rem, 1.4vw, 1.25rem);
  font-weight: 400;
  color: var(--muted);
  max-width: 56ch;
  line-height: 1.55;
  margin: 1.5rem 0 2.5rem;
}
.lede-narrow { @extend .lede; }
.lede-narrow {
  font-size: 1.1rem;
  color: var(--muted);
  max-width: 62ch;
  margin: 0 0 3rem;
}
.muted { color: var(--muted); }
.small { font-size: 0.875rem; }
strong { font-weight: 600; color: var(--espresso); }
em { font-style: italic; }

.eyebrow {
  display: inline-block;
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  font-family: var(--sans);
}
.eyebrow.muted { color: var(--muted); margin-left: 1rem; }
.section-tag {
  display: inline-block;
  padding: 0.4rem 0.85rem;
  border: 1px solid var(--line-2);
  border-radius: 999px;
  font-family: var(--sans);
  font-size: 0.625rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  font-weight: 600;
  color: var(--muted);
  margin-bottom: 1.75rem;
}

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

ul, ol { padding-left: 1.25rem; margin: 0 0 1rem; }
li { margin-bottom: 0.4rem; color: var(--espresso-2); }
.bullets { list-style: none; padding-left: 0; }
.bullets li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.65rem;
}
.bullets li::before {
  content: "—";
  position: absolute;
  left: 0; top: 0;
  color: var(--accent);
}

/* ----- Layout ------------------------------------------------------ */
.container {
  width: min(1240px, calc(100% - 3rem));
  margin: 0 auto;
}
.container.narrow {
  width: min(820px, calc(100% - 3rem));
}
.band {
  padding: clamp(5rem, 12vh, 9rem) 0;
  position: relative;
}
.band-paper { background: linear-gradient(180deg, var(--paper) 0%, #FAF5EC 100%); }
.band-cream { background: var(--cream); }

/* ----- Nav --------------------------------------------------------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.4rem 1.5rem 0;
  display: flex;
  justify-content: center;
  pointer-events: none;
}
.nav-pill {
  pointer-events: auto;
  background: rgba(253, 251, 247, 0.78);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 0.55rem 0.65rem 0.55rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
  box-shadow: var(--shadow-sm);
}
.nav-mark {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 0.8125rem;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--espresso);
  white-space: nowrap;
}
.nav-mark .bolt { color: var(--bolt); font-size: 1rem; }
.nav-links {
  display: flex; align-items: center; gap: 0.25rem;
  list-style: none; padding: 0; margin: 0;
}
.nav-links li {
  display: flex;
  align-items: center;
  margin: 0;
}
.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 500;
  line-height: 1;
  color: var(--espresso-2);
  border-radius: 999px;
  transition: all 360ms var(--ease-spring);
}
.nav-links a:hover {
  background: rgba(46,38,31,0.06);
  color: var(--espresso);
}
.nav-toggle {
  display: none;
  background: transparent;
  border: 0;
  width: 38px; height: 38px;
  padding: 0;
  position: relative;
  border-radius: 999px;
  cursor: pointer;
  transition: background 360ms var(--ease-spring);
}
.nav-toggle:hover { background: rgba(46,38,31,0.06); }
.nav-toggle span {
  position: absolute;
  left: 9px;
  width: 20px;
  height: 1.5px;
  background: var(--espresso);
  border-radius: 2px;
  transition: all 380ms var(--ease-spring);
}
.nav-toggle span:nth-child(1) { top: 14px; }
.nav-toggle span:nth-child(2) { top: 22px; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  top: 18px; transform: rotate(45deg);
}
.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  top: 18px; transform: rotate(-45deg);
}

/* ----- Hero -------------------------------------------------------- */
.hero {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  padding: 7rem 1.5rem 5rem;
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(201,162,74,0.10), transparent 70%),
    radial-gradient(ellipse 50% 40% at 10% 80%, rgba(143,163,142,0.12), transparent 60%),
    linear-gradient(180deg, var(--paper), #FAF5EC);
}
.hero-grid {
  width: min(1240px, calc(100% - 3rem));
  margin: 0 auto;
}
.hero-meta {
  display: flex; align-items: baseline; gap: 1rem;
  margin-bottom: 2rem;
}
.hero-cta {
  display: flex; gap: 0.75rem; flex-wrap: wrap;
  margin-top: 0.5rem;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin-top: 5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line);
}
.stat { display: flex; flex-direction: column; gap: 0.25rem; }
.stat-num {
  font-family: var(--serif);
  font-size: clamp(2rem, 3.2vw, 2.8rem);
  font-weight: 350;
  font-variation-settings: "opsz" 96;
  letter-spacing: -0.025em;
  color: var(--espresso);
  line-height: 1;
}
.stat-lbl {
  font-size: 0.8125rem;
  color: var(--muted);
  letter-spacing: 0.01em;
}

/* ----- Buttons ----------------------------------------------------- */
.btn-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.5rem 0.85rem 1.4rem;
  border-radius: 999px;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.9375rem;
  letter-spacing: -0.005em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 480ms var(--ease-spring);
  will-change: transform;
}
.btn-pill.primary {
  background: var(--espresso);
  color: var(--paper);
}
.btn-pill.primary:hover {
  background: var(--espresso-2);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
  color: var(--paper);
}
.btn-pill.ghost {
  background: transparent;
  border-color: var(--line-2);
  color: var(--espresso);
}
.btn-pill.ghost:hover {
  background: rgba(46,38,31,0.04);
  border-color: var(--line-2);
}
.btn-pill .btn-arrow {
  display: inline-flex;
  align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border-radius: 999px;
  background: rgba(255,255,255,0.16);
  font-size: 0.75rem;
  transition: transform 480ms var(--ease-spring);
}
.btn-pill.ghost .btn-arrow { background: rgba(46,38,31,0.06); }
.btn-pill:hover .btn-arrow { transform: translate(2px, -1px) scale(1.05); }
.btn-pill:active { transform: scale(0.98); }

/* ----- Cards (Double-bezel) --------------------------------------- */
.double-bezel {
  background: rgba(46,38,31,0.04);
  border: 1px solid var(--line);
  border-radius: var(--rad-lg);
  padding: 0.5rem;
  position: relative;
}
.card { /* alias when standalone */ }
.card-inner {
  background: var(--paper);
  border-radius: calc(var(--rad-lg) - 0.5rem);
  padding: 2rem;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.6),
    var(--shadow-sm);
  position: relative;
}

/* ----- Summary grid (Section 01) ---------------------------------- */
.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.summary-card {
  padding: 2rem 1.75rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--rad-md);
  position: relative;
  transition: transform 600ms var(--ease-spring), box-shadow 600ms var(--ease-spring);
}
.summary-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.summary-card .card-num {
  position: absolute;
  top: -0.8rem; left: 1.5rem;
  font-family: var(--serif);
  font-size: 1.05rem;
  font-style: italic;
  font-weight: 400;
  background: var(--accent);
  color: var(--paper);
  width: 1.8rem; height: 1.8rem;
  border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  letter-spacing: 0;
}
.summary-card h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
  margin-top: 0.5rem;
}
.summary-card p { margin: 0; font-size: 0.95rem; }

/* ----- Editorial split (Section 02) ------------------------------- */
.split {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 4rem;
  align-items: start;
}
.split-text { padding-top: 1rem; }
.split-fig {}

/* ----- Bento (Section 03) ----------------------------------------- */
.bento {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1rem;
  margin-top: 3rem;
}
.bento-cell {}
.bento-cell .card-inner { padding: 1.75rem; min-height: 9rem; }
.c-wide { grid-column: span 1; }
.bento-cell:nth-child(1) { grid-column: span 1; grid-row: span 2; }
.bento-cell:nth-child(4) { grid-column: span 2; }
.cell-tag {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  display: block;
}
.bento-h {
  font-family: var(--serif);
  font-size: clamp(1.5rem, 2.2vw, 2.1rem);
  font-weight: 350;
  font-variation-settings: "opsz" 72;
  letter-spacing: -0.02em;
  margin-bottom: 0.6rem;
}

/* ----- Method steps ----------------------------------------------- */
.steps {
  counter-reset: stepc;
  list-style: none;
  padding: 0;
  margin: 3rem 0 2.5rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}
.steps li {
  position: relative;
  padding-left: 0;
  padding: 2rem;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--rad-md);
  transition: all 600ms var(--ease-spring);
}
.steps li:hover {
  border-color: var(--line-2);
  box-shadow: var(--shadow-sm);
}
.step-num {
  font-family: var(--sans);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
  display: block;
}
.steps h4 { margin-bottom: 0.75rem; }
.steps p { margin: 0; }

.callout {
  padding: 1.75rem 2rem;
  background: rgba(143,163,142,0.10);
  border-left: 2px solid var(--sage-deep);
  border-radius: 0 var(--rad-md) var(--rad-md) 0;
  margin-top: 1.5rem;
}
.callout-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--sage-deep);
  display: block;
  margin-bottom: 0.5rem;
}
.callout p { margin: 0; color: var(--espresso-2); }
.callout em { color: var(--sage-deep); font-weight: 500; }

/* ----- Scenario tabs ---------------------------------------------- */
.scenario-tabs {
  display: inline-flex;
  gap: 0.25rem;
  padding: 0.35rem;
  background: rgba(46,38,31,0.06);
  border-radius: 999px;
  margin-bottom: 2rem;
}
.tab {
  background: transparent;
  border: 0;
  padding: 0.55rem 1.25rem;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  transition: all 380ms var(--ease-spring);
  letter-spacing: -0.005em;
}
.tab:hover { color: var(--espresso); }
.tab.active {
  background: var(--paper);
  color: var(--espresso);
  box-shadow: var(--shadow-sm);
}
.tab .sm {
  font-size: 0.75rem;
  color: var(--muted);
  font-weight: 400;
  margin-left: 0.3rem;
}

/* ----- KPI row ----------------------------------------------------- */
.kpi-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}
.kpi .card-inner {
  padding: 1.75rem;
  display: flex; flex-direction: column;
  gap: 0.5rem;
}
.kpi-lbl {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
}
.kpi-val {
  font-family: var(--serif);
  font-size: clamp(2.2rem, 3.5vw, 3rem);
  font-variation-settings: "opsz" 144;
  font-weight: 350;
  letter-spacing: -0.025em;
  line-height: 1;
  color: var(--accent);
}
.kpi-foot {
  font-size: 0.875rem;
  color: var(--muted);
  margin-top: 0.4rem;
}

/* ----- Map --------------------------------------------------------- */
.map-wrap .card-inner { padding: 0.75rem; }
.leaflet-mount {
  width: 100%;
  height: clamp(420px, 60vh, 640px);
  border-radius: calc(var(--rad-lg) - 1rem);
  overflow: hidden;
}

/* ----- Plotly figures --------------------------------------------- */
.plotly-fig {
  width: 100%;
  min-height: 420px;
}
.plotly-fig.small { min-height: 320px; }
.fig-cap {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0.75rem 0 0;
  max-width: 60ch;
  line-height: 1.55;
}
.fig-cap strong { color: var(--espresso); font-weight: 600; }

.card-h {
  font-family: var(--serif);
  font-size: 1.5rem;
  font-variation-settings: "opsz" 72;
  font-weight: 400;
  margin-bottom: 0.4rem;
}

/* ----- Caveats ----------------------------------------------------- */
.caveats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.caveat .card-inner { padding: 2rem; min-height: 100%; }
.caveat .cav-num {
  display: inline-flex;
  width: 2.4rem; height: 2.4rem;
  align-items: center; justify-content: center;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.15rem;
  background: rgba(184,133,79,0.12);
  color: var(--accent);
  border-radius: 999px;
  margin-bottom: 1rem;
}
.caveat h3 {
  font-size: 1.3rem;
  margin-bottom: 0.75rem;
}

/* ----- Recommendations -------------------------------------------- */
.recos {
  counter-reset: recoc;
  list-style: none;
  padding: 0;
  margin: 3rem 0 0;
  display: flex;
  flex-direction: column;
  gap: 1.75rem;
}
.recos li {
  position: relative;
  padding-left: 4rem;
}
.recos li::before {
  counter-increment: recoc;
  content: "0" counter(recoc);
  position: absolute;
  left: 0; top: 0.1rem;
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 1.5rem;
  color: var(--accent);
  font-variation-settings: "opsz" 96;
}
.recos h4 { margin-bottom: 0.4rem; }
.recos p { margin: 0; }

/* ----- Downloads --------------------------------------------------- */
.dl-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}
.dl-card {
  display: block;
  text-decoration: none;
  color: inherit;
  transition: all 600ms var(--ease-spring);
}
.dl-card .card-inner {
  padding: 1.75rem;
  display: flex; flex-direction: column;
  gap: 0.6rem;
  height: 100%;
  min-height: 220px;
}
.dl-card:hover {
  transform: translateY(-3px);
}
.dl-card:hover .card-inner {
  box-shadow: var(--shadow-md);
}
.dl-icon {
  font-family: var(--serif);
  font-size: 2rem;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.5rem;
}
.dl-card h3 { font-size: 1.2rem; margin-bottom: 0.3rem; }
.dl-card p {
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0 0 auto;
  flex: 1;
}
.dl-act {
  font-family: var(--sans);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--espresso);
  display: inline-flex;
  gap: 0.4rem;
  align-items: center;
  margin-top: 1rem;
}
.dl-act .btn-arrow {
  display: inline-flex; align-items: center; justify-content: center;
  width: 22px; height: 22px;
  border-radius: 999px;
  background: rgba(46,38,31,0.06);
  font-size: 0.75rem;
  transition: transform 480ms var(--ease-spring);
}
.dl-card:hover .btn-arrow { transform: translate(2px, -1px) scale(1.05); }

.repo-note {
  margin-top: 3rem;
  padding: 1.5rem 2rem;
  background: rgba(46,38,31,0.03);
  border-radius: var(--rad-md);
  border: 1px solid var(--line);
}
.repo-note p { margin: 0; font-size: 0.95rem; color: var(--espresso-2); }

/* ----- Footer ------------------------------------------------------ */
.footer {
  background: var(--espresso);
  color: var(--paper);
  padding: 5rem 0 3rem;
}
.footer p { color: rgba(253,251,247,0.7); max-width: 36ch; }
.foot-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 3rem;
}
.foot-mark {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-weight: 600;
  font-size: 1rem;
  letter-spacing: -0.005em;
  margin-bottom: 0.75rem;
}
.foot-mark .bolt { color: var(--bolt); }
.foot-h {
  display: block;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--bolt);
  margin-bottom: 1rem;
}
.footer ul { list-style: none; padding: 0; }
.footer li {
  font-size: 0.9rem;
  color: rgba(253,251,247,0.7);
  margin-bottom: 0.5rem;
}
.foot-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(253,251,247,0.10);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
.foot-bottom .muted { color: rgba(253,251,247,0.5); }
.version-chip {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.7rem;
  border: 1px solid rgba(253,251,247,0.18);
  border-radius: 999px;
  font-family: var(--mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: rgba(253,251,247,0.5);
  text-decoration: none;
  transition: all 360ms cubic-bezier(0.32,0.72,0,1);
}
.version-chip:hover {
  border-color: rgba(253,251,247,0.4);
  color: rgba(253,251,247,0.85);
}

/* ----- Reveal animation ------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  filter: blur(6px);
  transition:
    opacity 900ms var(--ease-spring),
    transform 900ms var(--ease-spring),
    filter 900ms var(--ease-spring);
  will-change: transform, opacity;
}
.reveal.in {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0);
}

/* ===== Responsive ================================================ */
@media (max-width: 1100px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .split { grid-template-columns: 1fr; gap: 2.5rem; }
  .summary-grid { grid-template-columns: 1fr; }
  .bento {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }
  .bento-cell:nth-child(1), .bento-cell:nth-child(4) {
    grid-column: span 1; grid-row: span 1;
  }
  .caveats { grid-template-columns: 1fr; }
  .dl-grid { grid-template-columns: repeat(2, 1fr); }
  .kpi-row { grid-template-columns: 1fr; }
  .foot-grid { grid-template-columns: 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  body { font-size: 16px; }
  .container { width: calc(100% - 2rem); }
  .band { padding: 4rem 0; }
  .hero { padding: 6rem 1rem 3rem; }
  .hero-cta { flex-direction: column; }
  .hero-cta .btn-pill { width: 100%; justify-content: space-between; }
  .hero-stats { grid-template-columns: 1fr 1fr; gap: 0.75rem; margin-top: 3rem; }
  .nav-pill { padding: 0.4rem 0.45rem 0.4rem 1rem; gap: 0.75rem; }
  .nav-links {
    position: absolute;
    top: calc(100% + 0.5rem);
    right: 0;
    flex-direction: column;
    background: rgba(253, 251, 247, 0.95);
    backdrop-filter: blur(28px);
    -webkit-backdrop-filter: blur(28px);
    border: 1px solid var(--line);
    border-radius: var(--rad-md);
    padding: 0.75rem;
    box-shadow: var(--shadow-md);
    min-width: 200px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: all 380ms var(--ease-spring);
  }
  .nav-toggle { display: block; }
  .nav-toggle[aria-expanded="true"] ~ .nav-links {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .nav-links a {
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 2.25rem;
    padding: 0.6rem 0.85rem;
  }
  .scenario-tabs { flex-wrap: wrap; }
  .dl-grid { grid-template-columns: 1fr; }
  .card-inner { padding: 1.5rem; }
  .recos li { padding-left: 3rem; }
  .recos li::before { font-size: 1.25rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  .reveal { opacity: 1; transform: none; filter: none; }
}

/* ===================================================================== */
/* Model D extension (v1.2): model toggle pill, fallback banner,         */
/* comparison section, model-keyed colours                               */
/* ===================================================================== */

:root {
  --model-c-color: #B8854F;        /* same as --accent, named for clarity */
  --model-d-color: #4A7A8C;        /* ocean blue — visually distinct from C */
}

.model-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.35rem;
  background: rgba(46,38,31,0.06);
  border-radius: 999px;
  margin-bottom: 1.5rem;
  margin-right: 1rem;
  vertical-align: top;
}
.model-pill .model-pill-lbl {
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0 0.65rem 0 0.85rem;
}
.model-btn {
  background: transparent;
  border: 0;
  padding: 0.5rem 1rem;
  font-family: var(--sans);
  font-weight: 500;
  font-size: 0.825rem;
  color: var(--muted);
  border-radius: 999px;
  cursor: pointer;
  transition: all 380ms var(--ease-spring);
  letter-spacing: -0.005em;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}
.model-btn:hover { color: var(--espresso); }
.model-btn.active {
  background: var(--paper);
  color: var(--espresso);
  box-shadow: var(--shadow-sm);
}
.model-btn[data-model="C"] .dot {
  background: var(--model-c-color);
}
.model-btn[data-model="D"] .dot {
  background: var(--model-d-color);
}
.model-btn .dot {
  display: inline-block;
  width: 0.55rem; height: 0.55rem;
  border-radius: 50%;
  vertical-align: middle;
}
.model-btn .sm {
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 400;
  margin-left: 0.3rem;
}

/* Banner shown when Model D collapses to climatology (no recency skill) */
.fallback-banner {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  margin: 1.5rem 0;
  background: linear-gradient(180deg, rgba(184,133,79,0.07), rgba(184,133,79,0.04));
  border: 1px solid rgba(184,133,79,0.18);
  border-left: 3px solid var(--accent);
  border-radius: 14px;
  font-family: var(--sans);
  font-size: 0.92rem;
  color: var(--ink);
  line-height: 1.55;
}
.fallback-banner.hidden { display: none; }
.fallback-banner .banner-icon {
  font-size: 1.25rem;
  margin-top: 0.05rem;
  color: var(--accent);
  flex-shrink: 0;
}
.fallback-banner .banner-tag {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 0.3rem;
}
.fallback-banner .banner-body { flex: 1; }
.fallback-banner code {
  font-family: var(--mono);
  font-size: 0.82em;
  background: rgba(46,38,31,0.06);
  padding: 0.05em 0.4em;
  border-radius: 4px;
}

/* Comparison section */
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin: 1.5rem 0 2.5rem 0;
}
.compare-grid .card { margin: 0; }
.compare-card-c, .compare-card-d {
  position: relative;
}
.compare-card-c::before, .compare-card-d::before {
  content: "";
  position: absolute;
  top: 1.5rem;
  left: 1.5rem;
  width: 0.6rem;
  height: 0.6rem;
  border-radius: 50%;
}
.compare-card-c::before { background: var(--model-c-color); }
.compare-card-d::before { background: var(--model-d-color); }
.compare-card-c .card-h, .compare-card-d .card-h {
  padding-left: 1.25rem;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 0.92rem;
  margin: 1.5rem 0 2rem 0;
}
.compare-table th, .compare-table td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid rgba(46,38,31,0.08);
}
.compare-table thead th {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid rgba(46,38,31,0.16);
}
.compare-table thead th:nth-child(2) { color: var(--model-c-color); }
.compare-table thead th:nth-child(3) { color: var(--model-d-color); }
.compare-table tbody td:first-child {
  font-weight: 500;
  color: var(--espresso);
  width: 22%;
}
.compare-table tbody tr:last-child td { border-bottom: 0; }
.compare-table tbody tr:hover { background: rgba(46,38,31,0.025); }

.skill-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 1rem 0 2rem 0;
}
.skill-tile {
  padding: 1.25rem;
  background: var(--paper);
  border: 1px solid rgba(46,38,31,0.08);
  border-radius: 12px;
}
.skill-tile .lbl {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--muted);
  display: block;
  margin-bottom: 0.5rem;
}
.skill-tile .vals {
  display: flex;
  align-items: baseline;
  gap: 0.75rem;
  font-family: var(--serif);
}
.skill-tile .vals .v-c,
.skill-tile .vals .v-d,
.skill-tile .vals .v-a {
  font-size: 1.5rem;
  font-weight: 400;
  font-variation-settings: "opsz" 144;
}
.skill-tile .vals .v-a { color: var(--muted); font-size: 1.05rem; }
.skill-tile .vals .v-c { color: var(--model-c-color); }
.skill-tile .vals .v-d { color: var(--model-d-color); }
.skill-tile .sub {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.72rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

/* Jaccard pill for top-20 overlap */
.jaccard-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.9rem 0.4rem 0.55rem;
  border-radius: 999px;
  background: rgba(74,122,140,0.08);
  border: 1px solid rgba(74,122,140,0.18);
  margin: 0.5rem 0 1rem 0;
}
.jaccard-pill .jp-num {
  font-family: var(--serif);
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--model-d-color);
}
.jaccard-pill .jp-lbl {
  font-family: var(--sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

@media (max-width: 768px) {
  .compare-grid { grid-template-columns: 1fr; }
  .skill-grid { grid-template-columns: 1fr 1fr; }
  .model-pill { margin-right: 0; margin-bottom: 1rem; }
}