/* ========================================================================
   CDP-Mamba · Paper 2 — Stylesheet
   Aesthetic: warm academic (cream background, deep navy + warm gold)
   Typography: Source Serif 4 (display + body) · Inter (UI) · JetBrains Mono
   ======================================================================== */

:root {
  /* Color tokens */
  --bg:        #FAF6F0;
  --bg-alt:    #F4EFE5;
  --surface:   #FFFFFF;
  --ink:       #1F1B16;
  --ink-2:     #4A423A;
  --ink-3:     #7A6F62;
  --ink-4:     #A89C8B;
  --line:      #E5DED1;
  --line-2:    #D8CFBC;
  --accent:    #0F2A47;   /* deep navy */
  --accent-2:  #1B3C5E;
  --gold:      #C8964A;   /* warm gold - CDP-Mamba */
  --gold-2:    #A87A33;
  --blue:      #5B8DBE;
  --purple:    #7B6FA0;
  --terra:     #C66B5A;
  --teal:      #3E6B89;
  --gray:      #888888;
  --dark-blue: #2C3E50;

  /* Layout */
  --maxw: 1240px;
  --maxw-narrow: 980px;
  --radius: 10px;
  --radius-lg: 14px;
  --shadow-sm: 0 1px 2px rgba(31, 27, 22, 0.04);
  --shadow-md: 0 4px 16px rgba(31, 27, 22, 0.06);
  --shadow-lg: 0 12px 40px rgba(31, 27, 22, 0.08);

  /* Type */
  --serif: "Source Serif 4", "Source Serif Pro", "Crimson Pro", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --mono:  "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;
}

/* ------------------------------------------------------------------------ */
/* Reset & base                                                             */
/* ------------------------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: 80px;
  overflow-x: hidden;
}
body { overflow-x: clip; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "kern", "liga", "onum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; transition: color 0.15s; }
a:hover { color: var(--gold-2); }

img, svg { max-width: 100%; display: block; }

::selection { background: rgba(200, 150, 74, 0.25); color: var(--ink); }

button { font: inherit; cursor: pointer; }

code, pre { font-family: var(--mono); }

.muted { color: var(--ink-3); }
.math { font-family: var(--serif); font-style: italic; }

/* ------------------------------------------------------------------------ */
/* Layout primitives                                                        */
/* ------------------------------------------------------------------------ */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
}

@media (max-width: 720px) {
  .container { padding: 0 20px; }
}

/* ------------------------------------------------------------------------ */
/* Top navigation                                                           */
/* ------------------------------------------------------------------------ */
.topnav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 246, 240, 0.85);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: box-shadow 0.2s;
}
.topnav.is-stuck { box-shadow: 0 2px 12px rgba(31, 27, 22, 0.06); }
.topnav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 12px 32px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
}
.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--accent);
  color: var(--gold);
  border-radius: 8px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 22px;
  letter-spacing: -0.02em;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.brand-title { font-weight: 600; font-size: 16px; letter-spacing: -0.01em; }
.brand-sub { font-size: 11px; color: var(--ink-3); font-family: var(--sans); letter-spacing: 0.02em; }

.nav-links {
  margin-left: auto;
  display: flex;
  gap: 22px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
}
.nav-links a {
  color: var(--ink-2);
  position: relative;
  padding: 4px 0;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a::after {
  content: "";
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1.5px;
  background: var(--gold);
  transition: width 0.2s;
}
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  background: var(--accent);
  color: #FAF6F0;
  border-radius: 8px;
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: background 0.15s;
}
.nav-cta:hover { background: var(--accent-2); color: #FAF6F0; }

@media (max-width: 820px) {
  .nav-links { display: none; }
  .topnav-inner { gap: 12px; padding: 10px 20px; }
  .brand-sub { display: none; }
}

/* ------------------------------------------------------------------------ */
/* Hero                                                                     */
/* ------------------------------------------------------------------------ */
.hero {
  padding: 80px 0 60px;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
  border-bottom: 1px solid var(--line);
  position: relative;
  overflow: hidden;
  min-width: 0;
}
.hero::before {
  content: "";
  position: absolute;
  top: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle at center, rgba(200, 150, 74, 0.10) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -150px; left: -150px;
  width: 500px; height: 500px;
  background: radial-gradient(circle at center, rgba(15, 42, 71, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 56px;
  align-items: start;
  position: relative;
  z-index: 1;
  min-width: 0;
}
@media (max-width: 980px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; padding: 0 20px; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 18px;
}
.eyebrow .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(200, 150, 74, 0.18);
}

.hero-title {
  font-family: var(--serif);
  font-size: clamp(28px, 5.2vw, 58px);
  line-height: 1.06;
  font-weight: 500;
  letter-spacing: -0.025em;
  margin: 0 0 22px;
  color: var(--ink);
  overflow-wrap: break-word;
  word-break: break-word;
  hyphens: auto;
}
@media (max-width: 720px) {
  .hero-title { font-size: 30px; line-height: 1.08; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .hero-title-line2 { font-size: 0.65em; }
}
.hero-title-line1 { display: block; font-weight: 600; }
.hero-title-line2 {
  display: block;
  font-weight: 400;
  font-style: italic;
  color: var(--ink-2);
  font-size: 0.6em;
  margin-top: 0.45em;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-2);
  max-width: 580px;
  margin: 0 0 36px;
}
@media (min-width: 720px) {
  .hero-sub { font-size: 19px; }
}
.hero-sub em { color: var(--gold-2); font-style: italic; }

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 32px;
  margin-bottom: 32px;
  padding-top: 28px;
  border-top: 1px solid var(--line-2);
}
.author-block { display: flex; flex-direction: column; }
.author-name { font-weight: 600; font-size: 16px; }
.author-affil { font-size: 13px; color: var(--ink-3); font-family: var(--sans); }

.hero-stats {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
  min-width: 0;
}
@media (max-width: 720px) {
  .hero-stats { gap: 16px 32px; }
}
@media (max-width: 540px) {
  .hero-stats { row-gap: 12px; column-gap: 16px; display: grid; grid-template-columns: 1fr 1fr; }
  .stat { flex: 0 0 auto; min-width: 0; }
  .stat-label { font-size: 9.5px; letter-spacing: 0.04em; }
}
.stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-width: 0;
  flex: 0 0 auto;
}
.stat-value {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat-label {
  font-family: var(--sans);
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-top: 4px;
  white-space: nowrap;
}
@media (max-width: 540px) {
  .stat-label { font-size: 9.5px; letter-spacing: 0.04em; }
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 10px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  text-decoration: none;
  transition: all 0.15s;
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--accent);
  color: #FAF6F0;
}
.btn-primary:hover {
  background: var(--accent-2);
  color: #FAF6F0;
  transform: translateY(-1px);
  box-shadow: 0 6px 16px rgba(15, 42, 71, 0.18);
}
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-2);
}
.btn-ghost:hover {
  background: var(--bg-alt);
  border-color: var(--ink-4);
  color: var(--ink);
}

/* Abstract sidebar */
.hero-abstract {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-md);
  position: relative;
}
.abstract-label {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold-2);
  font-weight: 600;
  margin-bottom: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
  width: 100%;
}
.hero-abstract p {
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0 0 14px;
}
.hero-abstract p:last-child { margin-bottom: 0; }
.hero-abstract strong { color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------------------ */
/* Sections                                                                 */
/* ------------------------------------------------------------------------ */
.section {
  padding: 100px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 760px;
  margin: 0 0 56px;
}
.section-num {
  display: inline-block;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold-2);
  margin-bottom: 14px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--gold);
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(28px, 3.6vw, 42px);
  line-height: 1.12;
  font-weight: 500;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
  color: var(--ink);
}
.section-deck {
  font-size: 17px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
  max-width: 640px;
}

@media (max-width: 720px) {
  .section { padding: 64px 0; }
}

/* ------------------------------------------------------------------------ */
/* TL;DR cards                                                              */
/* ------------------------------------------------------------------------ */
.tldr-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
@media (max-width: 980px) { .tldr-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .tldr-grid { grid-template-columns: 1fr; } }

.tldr-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 24px 24px;
  position: relative;
  transition: transform 0.2s, box-shadow 0.2s;
}
.tldr-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.tldr-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, var(--gold-2) 100%);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.tldr-icon {
  width: 42px; height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(200, 150, 74, 0.12);
  color: var(--gold-2);
  border-radius: 10px;
  margin-bottom: 18px;
}
.tldr-card h3 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 10px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.tldr-card p {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
}

/* ------------------------------------------------------------------------ */
/* Background & Concepts — onboarding ramp                                 */
/* ------------------------------------------------------------------------ */
.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}
@media (max-width: 980px) { .concept-grid { grid-template-columns: 1fr; } }

.concept-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px 26px 26px;
  position: relative;
}
.concept-num {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold-2);
  margin-bottom: 14px;
  padding: 3px 9px;
  background: rgba(200, 150, 74, 0.10);
  border-radius: 4px;
}
.concept-card h3 {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 14px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.concept-card p {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0 0 12px;
}
.concept-card p:last-child { margin-bottom: 0; }
.concept-card em { color: var(--gold-2); font-style: italic; }
.concept-example {
  margin-top: 14px !important;
  padding: 12px 14px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  font-size: 13.5px !important;
  line-height: 1.55 !important;
  border-left: 2px solid var(--gold);
}
.concept-example strong { color: var(--gold-2); font-weight: 600; }

.spectrum-svg {
  margin-top: 18px;
  padding: 8px 4px 0;
}
.spectrum-svg svg { width: 100%; height: auto; }

/* Metric definitions */
.metrics-card { margin-bottom: 32px; }
.metric-defs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin: 22px 0 18px;
}
.metric-def {
  display: grid;
  grid-template-columns: minmax(220px, 320px) 1fr;
  gap: 22px;
  align-items: start;
  padding-bottom: 18px;
  border-bottom: 1px dashed var(--line);
}
.metric-def:last-child { border-bottom: none; padding-bottom: 0; }
@media (max-width: 720px) {
  .metric-def { grid-template-columns: 1fr; gap: 10px; }
}
.metric-def dt {
  margin: 0;
  padding: 14px 16px;
  background: var(--bg-alt);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14.5px;
  line-height: 1.4;
  font-family: var(--serif);
}
.metric-def dt .math { font-size: 14.5px; }
.metric-def dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-2);
}
.metric-def dd strong { color: var(--ink); font-weight: 600; }
.metric-def dd em { color: var(--gold-2); font-style: italic; }

.metric-anchor-block {
  margin-top: 18px;
  padding: 16px 20px;
  background: linear-gradient(135deg, rgba(200, 150, 74, 0.06) 0%, rgba(200, 150, 74, 0.02) 100%);
  border-left: 3px solid var(--gold-2);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
}
.metric-anchor-block strong { color: var(--ink); font-weight: 600; }

/* PIT card */
.pit-card { padding: 36px 36px 32px; }
.pit-card p {
  font-size: 15.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0 0 14px;
}
.pit-bullets {
  margin: 18px 0;
  padding-left: 0;
  list-style: none;
  counter-reset: pit;
}
.pit-bullets li {
  position: relative;
  padding: 16px 0 16px 48px;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-2);
  counter-increment: pit;
}
.pit-bullets li:last-child { border-bottom: none; }
.pit-bullets li::before {
  content: counter(pit);
  position: absolute;
  left: 0; top: 16px;
  width: 32px; height: 32px;
  background: var(--accent);
  color: var(--gold);
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 700;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.pit-bullets li strong { color: var(--ink); font-weight: 600; }
.pit-footnote {
  margin-top: 22px !important;
  padding: 16px 20px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border-left: 3px solid var(--accent);
  font-size: 14.5px !important;
  line-height: 1.6 !important;
}
.pit-footnote strong { color: var(--accent); font-weight: 600; }

/* ------------------------------------------------------------------------ */
/* Cards & figure blocks                                                    */
/* ------------------------------------------------------------------------ */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow-sm);
}
.card + .card { margin-top: 24px; }
.card-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0 0 18px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.card-deck {
  font-size: 14.5px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0 0 20px;
}

.figure-block {
  margin: 32px 0;
}
.figure-block.tight { margin: 12px 0 0; }
.figure-frame {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}
.figure-frame img {
  max-width: 100%;
  max-height: 540px;
  width: auto;
  height: auto;
  object-fit: contain;
}
figure, figcaption {
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-3);
  margin-top: 12px;
}
figcaption strong { color: var(--ink); font-weight: 600; }
.fig-ref { color: var(--ink-4); }

/* ------------------------------------------------------------------------ */
/* Method-specific layout                                                   */
/* ------------------------------------------------------------------------ */
.method-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.3fr);
  gap: 40px;
  align-items: start;
  margin: 40px 0;
}
@media (max-width: 880px) { .method-grid { grid-template-columns: 1fr; } }

.method-figure .figure-frame { background: #F4E7CB; padding: 24px; }
.method-h3 {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 12px;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.method-text p {
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0 0 14px;
}
.equation-block {
  background: var(--bg-alt);
  border-left: 3px solid var(--gold);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 22px;
  margin: 20px 0;
  font-size: 16px;
  overflow-x: auto;
}
.method-note {
  font-size: 14.5px !important;
  color: var(--ink-3) !important;
  border-top: 1px dashed var(--line-2);
  padding-top: 16px;
  margin-top: 18px !important;
}
.method-note em { color: var(--accent); font-weight: 600; font-style: normal; }

.dualpath-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 40px;
  align-items: center;
  margin-top: 32px;
  padding: 32px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
@media (max-width: 880px) { .dualpath-grid { grid-template-columns: 1fr; padding: 24px; } }
.dp-text h3 { margin-top: 0; }
.dp-list {
  margin: 14px 0 14px;
  padding-left: 0;
  list-style: none;
  counter-reset: dp;
}
.dp-list li {
  position: relative;
  padding: 12px 0 12px 40px;
  border-bottom: 1px dashed var(--line);
  font-size: 15.5px;
  color: var(--ink-2);
  line-height: 1.5;
  counter-increment: dp;
}
.dp-list li:last-child { border-bottom: none; }
.dp-list li::before {
  content: counter(dp);
  position: absolute;
  left: 0; top: 12px;
  width: 26px; height: 26px;
  background: var(--accent);
  color: var(--gold);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.dp-list li strong { color: var(--ink); font-weight: 600; }
.dp-svg-frame {
  background: #FBF7EE;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}
.dp-svg-frame svg { width: 100%; height: auto; }

/* ------------------------------------------------------------------------ */
/* Chart cards                                                              */
/* ------------------------------------------------------------------------ */
.chart-card { padding: 28px; }
.chart-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.chart-title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  margin: 0;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.chart-meta {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-3);
  letter-spacing: 0.02em;
}
.chart-legend, .chart-legend-static {
  display: flex;
  align-items: center;
  gap: 14px;
  font-family: var(--sans);
  font-size: 12.5px;
  color: var(--ink-2);
}
.chart-legend .leg-item, .legend-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.chart-legend .leg-item .dot, .legend-item .dot {
  width: 10px; height: 10px;
  border-radius: 2px;
  display: inline-block;
}
.legend-bar {
  display: inline-block;
  width: 80px; height: 10px;
  background: linear-gradient(90deg, #FAF6F0 0%, #5B3A1A 100%);
  border-radius: 2px;
}
.chart-body {
  position: relative;
  margin: 12px 0 16px;
}
.chart-foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
}
.metric-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 500;
  color: var(--ink-2);
  padding: 4px 10px;
  background: var(--bg-alt);
  border-radius: 6px;
}
.metric-pill .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  display: inline-block;
}
.chart-note {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-3);
  line-height: 1.5;
  flex: 1;
  min-width: 240px;
}
.chart-note strong { color: var(--ink); font-weight: 600; }
.chart-note em { color: var(--gold-2); font-style: italic; }

/* ------------------------------------------------------------------------ */
/* Data tables                                                              */
/* ------------------------------------------------------------------------ */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--sans);
  font-size: 13.5px;
}
.data-table thead th {
  text-align: left;
  padding: 12px 14px;
  background: var(--bg-alt);
  color: var(--ink-2);
  font-weight: 600;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--line);
}
.data-table tbody td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.data-table tbody tr:last-child td { border-bottom: none; }
.data-table tbody tr:hover { background: var(--bg-alt); }
.data-table .num-col, .data-table .num { text-align: right; }
.data-table .seed-divider td {
  padding: 8px 14px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 600;
  color: var(--gold-2);
  background: var(--bg);
  border-top: 1px solid var(--line-2);
  border-bottom: 1px solid var(--line);
}
.data-table .row-best td {
  background: rgba(200, 150, 74, 0.08);
  font-weight: 600;
  color: var(--ink);
}
.data-table .row-highlight td {
  background: rgba(15, 42, 71, 0.04);
  color: var(--ink);
}
.data-table .row-highlight strong { color: var(--accent); }
.data-table--clean tbody td { padding: 12px 14px; }
.data-table--clean td:first-child { font-weight: 500; color: var(--ink); }

.caption {
  font-family: var(--sans);
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-3);
  margin: 16px 0 0;
}
.caption strong { color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------------------ */
/* Results grid                                                             */
/* ------------------------------------------------------------------------ */
.results-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 24px;
  margin-top: 32px;
}
@media (max-width: 980px) { .results-grid { grid-template-columns: 1fr; } }

/* Seed cards */
.seed-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 16px 0 18px;
}
.seed-card-inner {
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid var(--line);
  position: relative;
}
.seed-42 { background: linear-gradient(135deg, rgba(200, 150, 74, 0.08) 0%, rgba(200, 150, 74, 0.02) 100%); border-color: rgba(200, 150, 74, 0.3); }
.seed-43 { background: linear-gradient(135deg, rgba(91, 141, 190, 0.08) 0%, rgba(91, 141, 190, 0.02) 100%); border-color: rgba(91, 141, 190, 0.3); }
.seed-tag {
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}
.seed-42 .seed-tag { color: var(--gold-2); }
.seed-43 .seed-tag { color: var(--blue); }
.seed-attractor {
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-2);
  margin: 2px 0 12px;
  font-style: italic;
}
.seed-metrics {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.seed-metrics > div {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  border-bottom: 1px dashed var(--line);
  padding-bottom: 6px;
}
.seed-metrics > div:last-child { border-bottom: none; padding-bottom: 0; }
.seed-metrics .num {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.seed-metrics .lbl {
  font-family: var(--sans);
  font-size: 11px;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.seed-explain {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--ink-2);
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

/* ------------------------------------------------------------------------ */
/* Robustness grid                                                          */
/* ------------------------------------------------------------------------ */
.robust-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 32px;
}
@media (max-width: 880px) { .robust-grid { grid-template-columns: 1fr; } }

/* ------------------------------------------------------------------------ */
/* Method — flow steps (numbered walkthrough)                              */
/* ------------------------------------------------------------------------ */
.method-flow {
  margin: 32px 0;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 8px 0;
}
.flow-step {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 20px;
  align-items: start;
  padding: 22px 32px;
  border-bottom: 1px dashed var(--line);
}
.flow-step:last-child { border-bottom: none; }
@media (max-width: 720px) {
  .flow-step { grid-template-columns: 1fr; gap: 8px; padding: 18px 22px; }
}
.flow-num {
  font-family: var(--serif);
  font-size: 28px;
  font-weight: 700;
  color: var(--gold-2);
  line-height: 1;
  letter-spacing: -0.02em;
}
.flow-body h4 {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.flow-body p {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0;
}

/* Scatter read card */
.scatter-read { margin-top: 24px; }
.scatter-read p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0 0 18px;
}
.scatter-read-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin: 14px 0 18px;
}
@media (max-width: 720px) { .scatter-read-grid { grid-template-columns: 1fr; } }
.scatter-read-cell {
  padding: 16px 18px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border: 1px solid var(--line);
}
.scatter-tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 4px;
  margin-bottom: 10px;
}
.scatter-tag-balanced { background: rgba(200, 150, 74, 0.14); color: var(--gold-2); }
.scatter-tag-suppressive { background: rgba(91, 141, 190, 0.14); color: var(--blue); }
.scatter-read-cell p {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0;
}
.scatter-anchor {
  margin: 18px 0 0 !important;
  padding: 14px 18px;
  background: linear-gradient(135deg, rgba(15, 42, 71, 0.04) 0%, rgba(15, 42, 71, 0.02) 100%);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px !important;
  line-height: 1.6 !important;
}
.scatter-anchor strong { color: var(--accent); font-weight: 600; }

/* Attractor chooser */
.attractor-chooser {
  margin-top: 24px;
  padding: 32px 36px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
}
.attractor-chooser > h3 {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 600;
  margin: 0 0 8px;
  color: var(--ink);
  letter-spacing: -0.015em;
}
.attractor-chooser > p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0 0 22px;
}
.chooser-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
@media (max-width: 720px) { .chooser-grid { grid-template-columns: 1fr; } }
.chooser-card {
  padding: 22px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--bg-alt);
  position: relative;
}
.chooser-balanced { border-left: 4px solid var(--gold); }
.chooser-suppressive { border-left: 4px solid var(--blue); }
.chooser-tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 12px;
}
.chooser-balanced .chooser-tag { color: var(--gold-2); }
.chooser-suppressive .chooser-tag { color: var(--blue); }
.chooser-metric {
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.02em;
  line-height: 1;
}
.chooser-submetric {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 500;
  color: var(--ink-3);
  margin-top: 4px;
}
.chooser-list {
  margin: 16px 0 0;
  padding-left: 0;
  list-style: none;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--ink-2);
}
.chooser-list li {
  position: relative;
  padding: 6px 0 6px 18px;
  border-top: 1px dashed var(--line);
}
.chooser-list li:first-child { border-top: none; }
.chooser-list li::before {
  content: "→";
  position: absolute;
  left: 0; top: 6px;
  color: var(--gold-2);
  font-weight: 600;
}
.chooser-list strong { color: var(--ink); font-weight: 600; }
.chooser-foot {
  margin: 22px 0 0 !important;
  padding: 14px 18px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px !important;
  line-height: 1.6 !important;
  color: var(--ink-2);
}
.chooser-foot strong { color: var(--accent); font-weight: 600; }

/* Robustness: extrapolation explanation */
.extrapolation-card { margin-top: 24px; }
.extrapolation-card p {
  font-size: 15px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0 0 14px;
}
.extrapolation-card em { color: var(--gold-2); font-style: italic; }
.extrapolation-footnote {
  margin-top: 22px !important;
  padding: 16px 20px;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border-left: 3px solid var(--gold);
  font-size: 14px !important;
  line-height: 1.6 !important;
}
.extrapolation-footnote strong { color: var(--ink); font-weight: 600; }

/* Discussion: reviewer Q&A grid */
.reviewer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}
@media (max-width: 880px) { .reviewer-grid { grid-template-columns: 1fr; } }
.reviewer-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 26px 26px 22px;
}
.reviewer-q {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 14px;
  letter-spacing: -0.01em;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.reviewer-card p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-2);
  margin: 0 0 12px;
}
.reviewer-card p:last-child { margin-bottom: 0; }
.reviewer-card em { color: var(--gold-2); font-style: italic; }
.reviewer-card strong { color: var(--ink); font-weight: 600; }

.limitations-callout {
  padding: 28px 32px;
  background: linear-gradient(135deg, rgba(198, 107, 90, 0.08) 0%, rgba(198, 107, 90, 0.03) 100%);
  border: 1px solid rgba(198, 107, 90, 0.25);
  border-left: 4px solid var(--terra);
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}
.limitations-marker {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--terra);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(198, 107, 90, 0.3);
}
.limitations-callout p {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--ink-2);
  margin: 0;
}

.future-card { padding: 32px; }
.future-list {
  margin: 16px 0 0;
  padding-left: 0;
  list-style: none;
  counter-reset: future;
}
.future-list li {
  position: relative;
  padding: 14px 0 14px 48px;
  border-bottom: 1px dashed var(--line);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--ink-2);
  counter-increment: future;
}
.future-list li:last-child { border-bottom: none; padding-bottom: 0; }
.future-list li::before {
  content: counter(future);
  position: absolute;
  left: 0; top: 14px;
  width: 30px; height: 30px;
  background: var(--accent);
  color: var(--gold);
  font-family: var(--sans);
  font-size: 12px;
  font-weight: 600;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.future-list li strong { color: var(--ink); font-weight: 600; }

/* ------------------------------------------------------------------------ */
/* Insight block                                                            */
/* ------------------------------------------------------------------------ */
.insight-block {
  margin-top: 32px;
  padding: 36px 40px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #FAF6F0;
  border-radius: var(--radius-lg);
  position: relative;
  overflow: hidden;
}
.insight-block::before {
  content: "";
  position: absolute;
  top: -50px; right: -50px;
  width: 240px; height: 240px;
  background: radial-gradient(circle, rgba(200, 150, 74, 0.15) 0%, transparent 70%);
  pointer-events: none;
}
.insight-marker {
  display: inline-block;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--gold);
}
.insight-title {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: -0.015em;
}
.insight-block p {
  font-size: 15.5px;
  line-height: 1.65;
  margin: 0 0 14px;
  color: rgba(250, 246, 240, 0.85);
  position: relative;
}
.insight-block p:last-child { margin-bottom: 0; }
.insight-block em { color: var(--gold); font-style: italic; }
.insight-block strong { color: #FAF6F0; font-weight: 600; }

/* ------------------------------------------------------------------------ */
/* Efficiency implications                                                  */
/* ------------------------------------------------------------------------ */
.eff-implications {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
@media (max-width: 880px) { .eff-implications { grid-template-columns: 1fr; } }

.eff-imp {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.eff-imp-tag {
  display: inline-block;
  align-self: flex-start;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-2);
  padding: 3px 8px;
  background: rgba(200, 150, 74, 0.10);
  border-radius: 4px;
}
.eff-imp-cost {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: -0.01em;
}
.eff-imp-note {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-2);
}

/* ------------------------------------------------------------------------ */
/* Cite section                                                             */
/* ------------------------------------------------------------------------ */
.cite-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 24px;
}
@media (max-width: 880px) { .cite-grid { grid-template-columns: 1fr; } }

.bibtex {
  background: #1F1B16;
  color: #E8E2D5;
  border-radius: var(--radius);
  padding: 20px 22px;
  font-size: 13px;
  line-height: 1.6;
  overflow-x: auto;
  margin: 0;
  white-space: pre;
}
.bibtex code { color: inherit; }

.resource-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.resource-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
  color: var(--ink-2);
  line-height: 1.5;
}
.resource-list li:last-child { border-bottom: none; }
.rl-label {
  font-family: var(--sans);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  font-weight: 600;
}

/* ------------------------------------------------------------------------ */
/* Footer                                                                   */
/* ------------------------------------------------------------------------ */
.site-footer {
  padding: 32px 0;
  background: var(--bg-alt);
  border-top: 1px solid var(--line);
}
.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.footer-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  background: var(--accent);
  color: var(--gold);
  border-radius: 6px;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 16px;
  margin-right: 12px;
  vertical-align: middle;
}
.footer-text {
  font-family: var(--sans);
  font-size: 13px;
  color: var(--ink-2);
  font-weight: 500;
}
.footer-meta {
  font-family: var(--sans);
  font-size: 12px;
  color: var(--ink-3);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ------------------------------------------------------------------------ */
/* Animations                                                               */
/* ------------------------------------------------------------------------ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}
.section, .tldr-card, .card, .figure-block {
  animation: fadeUp 0.5s ease-out both;
}

/* ------------------------------------------------------------------------ */
/* Print                                                                    */
/* ------------------------------------------------------------------------ */
@media print {
  .topnav, .nav-cta, .hero-actions, .site-footer { display: none; }
  .section, .section-alt { padding: 24px 0; background: white; }
  .card, .tldr-card { box-shadow: none; break-inside: avoid; }
  body { font-size: 11pt; }
  a { color: inherit; text-decoration: underline; }
}