/* ==========================================================================
   SYG Consulting — Agentic Simulation site
   brand.css — single stylesheet, no framework.
   Source of truth: SYG brand kit (tokens.json / syg-brand.css / CLAUDE.md).
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */
:root {
  /* brand colors */
  --syg-midnight-blue: #071E3D;
  --syg-steel-cyan:    #2F80A3;
  --syg-electric-teal: #00A6A6;
  --syg-graphite:      #202124;
  --syg-cool-white:    #F8FAFC;
  --syg-app-bg:        #E9EDF1;
  --syg-muted:         #5B6169;
  --syg-faint:         #8A9099;
  --syg-hairline:      #D9E0E6;
  --syg-callout:       #F1F5F8;

  /* semantic */
  --color-primary:   var(--syg-midnight-blue);
  --color-secondary: var(--syg-steel-cyan);
  --color-accent:    var(--syg-electric-teal);
  --color-text:      var(--syg-graphite);
  --color-muted:     var(--syg-muted);
  --color-faint:     var(--syg-faint);
  --color-surface:   var(--syg-cool-white);
  --color-canvas:    var(--syg-app-bg);
  --color-hairline:  var(--syg-hairline);
  --color-callout:   var(--syg-callout);
  --color-link:      var(--syg-steel-cyan);

  /* dark band */
  --band-bg:       var(--syg-midnight-blue);
  --band-text:     var(--syg-cool-white);
  --band-muted:    #B7C3D0;
  --band-hairline: rgba(248, 250, 252, 0.18);

  /* type */
  --font-serif: 'Times New Roman', Times, 'Liberation Serif', serif;
  --font-ui:    'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;

  --fs-display: clamp(34px, 2.2rem + 2.2vw, 56px);
  --fs-h1:      clamp(32px, 1.75rem + 1vw, 40px);
  --fs-h2:      19px;
  --fs-h3:      17px;
  --fs-body:    17px;
  --fs-small:   15px;
  --fs-caption: 13px;
  --fs-eyebrow: 11px;
  --fs-stat:    clamp(40px, 2.2rem + 1vw, 48px);

  --lh-body:  1.6;
  --lh-paper: 1.7;
  --lh-tight: 1.15;

  --track-eyebrow: 0.16em;
  --track-h2:      0.02em;

  /* rules and borders */
  --rule-accent: 2px solid var(--color-accent);
  --rule-header: 2px solid var(--color-primary);
  --hairline:    1px solid var(--color-hairline);

  /* layout */
  --page-max:   1120px;
  --wrap-max:   1040px;
  --prose-max:  72ch;
  --gutter:     clamp(16px, 4vw, 40px);
  --section-y:  clamp(40px, 6vw, 72px);
  --nav-h:      64px;

  --radius-sm: 4px;
  --radius-md: 6px;

  color-scheme: light;
}

/* --------------------------------------------------------------------------
   2. Reset and base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: var(--fs-body);
  line-height: var(--lh-body);
  color: var(--color-text);
  background: var(--color-canvas);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--color-link); text-decoration: none; }
a:hover, a:focus-visible { text-decoration: underline; text-underline-offset: 0.15em; }
a:focus-visible, button:focus-visible, summary:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

strong, b { font-weight: 700; }
em, i { font-style: italic; }
small { font-size: var(--fs-small); }
hr { border: 0; border-top: var(--hairline); margin: 2rem 0; }
code, pre {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
}
pre { overflow-x: auto; padding: 12px 16px; background: var(--color-callout); border: var(--hairline); }

blockquote {
  margin: 1.5em 0;
  padding: 0 0 0 20px;
  border-left: var(--rule-accent);
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  color: var(--color-primary);
  margin: 0 0 0.5em;
  font-weight: 700;
  text-wrap: balance;
}

h1 {
  font-size: var(--fs-h1);
  line-height: var(--lh-tight);
  letter-spacing: -0.005em;
}

h2 {
  font-size: var(--fs-h2);
  line-height: 1.3;
  text-transform: uppercase;
  letter-spacing: var(--track-h2);
  border-bottom: var(--hairline);
  padding-bottom: 8px;
  margin: 0 0 1.2em;
}

h3 {
  font-size: var(--fs-h3);
  line-height: 1.35;
  color: var(--color-secondary);
  font-weight: 700;
  margin: 1.6em 0 0.5em;
}
h3:first-child { margin-top: 0; }

h4 {
  font-size: var(--fs-body);
  font-style: italic;
  font-weight: 400;
  margin: 1.4em 0 0.4em;
}

.display {
  font-size: var(--fs-display);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 700;
  margin: 0 0 0.5em;
}

.eyebrow {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--color-secondary);
  margin: 0 0 12px;
}

.lead {
  font-size: 20px;
  line-height: 1.5;
  color: var(--color-muted);
  max-width: 60ch;
  margin: 0 0 1.2em;
}

.meta,
.caption {
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  color: var(--color-muted);
  line-height: 1.5;
}

.muted { color: var(--color-muted); }
.faint { color: var(--color-faint); }

/* lists: teal markers */
ul, ol { padding-left: 1.4em; margin: 0 0 1.2em; }
li { margin: 0 0 0.4em; }
li::marker { color: var(--color-accent); }
ol li::marker { font-weight: 700; }

/* --------------------------------------------------------------------------
   4. Layout scaffolding
   -------------------------------------------------------------------------- */
.page {
  max-width: var(--page-max);
  margin: 0 auto;
  background: var(--color-surface);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.wrap {
  width: 100%;
  max-width: var(--wrap-max);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section {
  padding-block: var(--section-y);
}
.section + .section { padding-top: 0; }

.section-tight { padding-block: calc(var(--section-y) * 0.5); }

.band {
  padding-block: var(--section-y);
}

.band-dark {
  background: var(--band-bg);
  color: var(--band-text);
}
.band-dark h1, .band-dark h2, .band-dark h3, .band-dark .display { color: var(--band-text); }
.band-dark h2 { border-bottom-color: var(--band-hairline); }
.band-dark .eyebrow { color: var(--color-accent); }
.band-dark .lead { color: var(--band-muted); }
.band-dark a { color: var(--band-text); }
.band-dark li::marker { color: var(--color-accent); }
.band-dark .caption, .band-dark .meta { color: var(--band-muted); }

.page-header {
  padding-block: var(--section-y) calc(var(--section-y) * 0.6);
  border-bottom: var(--rule-header);
  margin-bottom: var(--section-y);
}
.page-header h1 { margin-bottom: 0.4em; }
.page-header .lead { margin-bottom: 0; }

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.two-col > * { min-width: 0; }

@media (max-width: 860px) {
  .two-col { grid-template-columns: minmax(0, 1fr); }
}

.prose-block { max-width: var(--prose-max); }
.prose-block > p:last-child { margin-bottom: 0; }
.table-block { max-width: none; }
.table-block > p, .table-block > ul, .table-block > ol { max-width: var(--prose-max); }
.prose-block + .figure, .prose-block + .steps, .prose-block + .stats, .prose-block + .cards { margin-top: 28px; }
.two-col-text p:last-child { margin-bottom: 0; }
.two-col-figure { grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); }
.two-col-figure > div:first-child { max-width: var(--prose-max); }
.two-col-figure .figure { margin-top: 0; }
@media (max-width: 860px) { .two-col-figure { grid-template-columns: minmax(0, 1fr); } }
.pullquote {
  margin: 0;
  padding: 8px 0 8px 24px;
  border-left: var(--rule-accent);
  font-size: 22px;
  line-height: 1.45;
  color: var(--color-primary);
  max-width: 60ch;
}
.pullquote-source { font-family: var(--font-ui); font-size: var(--fs-caption); color: var(--color-muted); margin-top: 12px; }

/* --------------------------------------------------------------------------
   5. Navigation
   -------------------------------------------------------------------------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-surface);
  border-bottom: var(--hairline);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: var(--nav-h);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--color-primary);
  text-decoration: none;
  flex-shrink: 0;
}
.logo:hover, .logo:focus-visible { text-decoration: none; }
.logo > svg { height: 40px; width: auto; display: block; }
.logo-mark { width: 30px; height: 30px; flex-shrink: 0; }
.logo-word {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.01em;
}
.logo-sub {
  display: block;
  font-family: var(--font-serif);
  font-size: 9px;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--color-muted);
  margin-top: 3px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(12px, 1.8vw, 24px);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links li { margin: 0; }
.nav-links a {
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-primary);
  text-decoration: none;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.nav-links a:hover, .nav-links a:focus-visible { border-bottom-color: var(--color-accent); text-decoration: none; }
.nav-links a[aria-current="page"] { border-bottom-color: var(--color-primary); }
.nav-links a.btn { border-bottom: 0; padding: 9px 14px; font-size: 12px; color: var(--color-surface); }
.nav-links a.btn:hover, .nav-links a.btn:focus-visible { color: #fff; }

.nav-toggle {
  display: none;
  appearance: none;
  background: transparent;
  border: var(--hairline);
  border-radius: var(--radius-sm);
  width: 42px;
  height: 38px;
  padding: 0;
  cursor: pointer;
  color: var(--color-primary);
  align-items: center;
  justify-content: center;
}
.nav-toggle svg { width: 20px; height: 20px; }
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-open { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

@media (max-width: 760px) {
  .nav-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--color-surface);
    border-bottom: var(--rule-header);
    padding: 8px var(--gutter) 16px;
  }
  .nav-links.is-open { display: flex; }
  .nav-links a { display: block; padding: 12px 0; border-bottom: var(--hairline); font-size: 15px; }
  .nav-links a[aria-current="page"] { border-bottom: var(--hairline); color: var(--color-secondary); }
  .nav-links li:last-child { margin-top: 12px; }
  .nav-links .btn { display: inline-block; padding: 10px 16px; border: 0; }
}

/* --------------------------------------------------------------------------
   6. Buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  line-height: 1;
  padding: 13px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: var(--color-surface);
  text-decoration: none;
  cursor: pointer;
  transition: background-color 120ms ease, color 120ms ease;
}
.btn:hover, .btn:focus-visible { background: var(--color-secondary); border-color: var(--color-secondary); color: #fff; text-decoration: none; }

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
}
.btn-secondary:hover, .btn-secondary:focus-visible { background: var(--color-primary); color: var(--color-surface); border-color: var(--color-primary); }

.band-dark .btn {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-primary);
}
.band-dark .btn:hover, .band-dark .btn:focus-visible { background: #33B8B8; border-color: #33B8B8; color: var(--color-primary); }
.band-dark .btn-secondary {
  background: transparent;
  border-color: var(--band-text);
  color: var(--band-text);
}
.band-dark .btn-secondary:hover, .band-dark .btn-secondary:focus-visible { background: var(--band-text); color: var(--color-primary); }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */
.hero { padding-block: clamp(48px, 8vw, 96px); }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.hero-grid > * { min-width: 0; }
.hero .display { max-width: 20ch; }
.hero .lead { max-width: 52ch; font-size: clamp(17px, 1rem + 0.4vw, 20px); }
.hero-visual { width: 100%; }
.hero-visual svg { width: 100%; height: auto; }
.hero-visual .caption { margin-top: 10px; }
.hero-secondary { color: var(--band-muted); max-width: 52ch; margin: 0 0 0.5em; }
.hero-grid-mark { grid-template-columns: minmax(0, 1fr) 200px; align-items: center; }
.hero-mark { width: 200px; max-width: 100%; margin-left: auto; opacity: 0.95; }
.hero-mark svg { width: 100%; height: auto; }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); }
  .hero-visual { max-width: 520px; }
  .hero-grid-mark { grid-template-columns: minmax(0, 1fr); }
  .hero-mark { display: none; }
}

/* --------------------------------------------------------------------------
   8. Steps
   -------------------------------------------------------------------------- */
.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
}
.steps > li {
  position: relative;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 0 20px;
  padding-bottom: 32px;
  margin: 0;
}
.steps > li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-serif);
  font-size: 44px;
  line-height: 1;
  font-weight: 700;
  color: var(--color-primary);
  grid-row: 1 / span 2;
  font-variant-numeric: tabular-nums lining-nums;
}
.steps > li::after {
  content: "";
  position: absolute;
  left: 72px; right: 0;
  bottom: 0;
  border-top: 1px solid var(--color-accent);
  opacity: 0.6;
}
.steps > li:last-child { padding-bottom: 0; }
.steps > li:last-child::after { display: none; }
.steps > li + li { padding-top: 28px; }
.steps h3 { margin: 6px 0 0.4em; }
.steps .step-body { max-width: var(--prose-max); }
.steps .step-body { grid-column: 2; }
.steps .step-body p:last-child { margin-bottom: 0; }
@media (max-width: 560px) {
  .stat-num { font-size: 34px; }
  .steps > li { grid-template-columns: 52px 1fr; gap: 0 14px; }
  .steps > li::before { font-size: 34px; }
  .steps > li::after { left: 0; }
}

/* --------------------------------------------------------------------------
   9. Stats
   -------------------------------------------------------------------------- */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 24px 32px;
  list-style: none;
  margin: 0;
  padding: 24px 0;
  border-top: var(--rule-header);
  border-bottom: var(--hairline);
}
.stats > li { margin: 0; }
.stat-num {
  display: block;
  font-family: var(--font-serif);
  font-size: var(--fs-stat);
  line-height: 1;
  font-weight: 700;
  color: var(--color-primary);
  font-variant-numeric: tabular-nums lining-nums;
  letter-spacing: -0.01em;
}
.stat-label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  color: var(--color-muted);
  margin-top: 8px;
  line-height: 1.4;
}
.stats-note { margin-top: 12px; }
/* text-valued stats ("Hundreds", "As many options") */
.stats-text {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px 24px;
  padding: 0;
  border-top: 0;
  border-bottom: 0;
}
.stats-text > li { border-top: var(--hairline); padding: 20px 0 4px; }
.stats-text .stat-num { font-size: 26px; line-height: 1.15; letter-spacing: 0; text-wrap: balance; }
.stats-text .stat-label { font-family: var(--font-serif); font-size: 15px; color: var(--color-muted); margin-top: 6px; line-height: 1.45; }
.stats-text + .figure { margin-top: 32px; }
@media (max-width: 899px) { .stats-text { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 559px) { .stats-text { grid-template-columns: minmax(0, 1fr); } }
.band-dark .stats { border-top-color: var(--color-accent); border-bottom-color: var(--band-hairline); }
.band-dark .stat-num { color: var(--band-text); }
.band-dark .stat-label { color: var(--band-muted); }

/* --------------------------------------------------------------------------
   10. Cards
   -------------------------------------------------------------------------- */
.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.cards > li, .card {
  margin: 0;
  padding: 22px 22px 24px;
  border: var(--hairline);
  background: #fff;
  border-top: var(--rule-header);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.card h3 { margin: 0; }
.card p { font-size: var(--fs-small); color: var(--color-muted); }
.card .eyebrow { margin-bottom: 4px; }
.card ul { font-size: var(--fs-small); margin-bottom: 0; }
.card a.card-link { margin-top: auto; font-family: var(--font-ui); font-size: var(--fs-caption); font-weight: 600; letter-spacing: 0.03em; }
.cards-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.cards-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 960px) {
  .cards, .cards-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 600px) {
  .cards, .cards-2, .cards-4 { grid-template-columns: minmax(0, 1fr); }
}

/* --------------------------------------------------------------------------
   11. Callout
   -------------------------------------------------------------------------- */
.callout {
  background: var(--color-callout);
  border-left: 4px solid var(--color-accent);
  padding: 20px 24px;
  margin: 1.6em 0;
}
.callout-label {
  display: block;
  font-family: var(--font-ui);
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 8px;
}
.callout p:last-child { margin-bottom: 0; }
.callout ul, .callout ol { margin-bottom: 0; }

/* --------------------------------------------------------------------------
   12. Tables
   -------------------------------------------------------------------------- */
.table-scroll {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 1.4em 0;
  max-width: 100%;
}
table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--fs-small);
  line-height: 1.45;
}
thead th {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-align: left;
  color: #fff;
  background: var(--color-primary);
  padding: 10px 12px;
  vertical-align: bottom;
}
tbody td, tbody th {
  padding: 10px 12px;
  border-bottom: var(--hairline);
  vertical-align: top;
  text-align: left;
}
tbody tr > :first-child {
  color: var(--color-primary);
  font-weight: 600;
}
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
table caption {
  caption-side: bottom;
  text-align: left;
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  color: var(--color-muted);
  padding-top: 8px;
}
.table-scroll table { min-width: 560px; }

/* --------------------------------------------------------------------------
   13. Figures
   -------------------------------------------------------------------------- */
.figure {
  margin: 1.6em 0;
  padding: 0;
}
.figure > svg, .figure > img, .figure .figure-body > svg { width: 100%; max-width: 100%; height: auto; }
.figure-body { border: var(--hairline); background: #fff; padding: 16px; }
.figure-wide { padding: 0; overflow-x: auto; -webkit-overflow-scrolling: touch; }
.figure-scroll { min-width: 720px; padding: 12px; }
.figure-scroll svg { width: 100%; height: auto; }
.figure-missing { min-height: 160px; display: flex; align-items: center; justify-content: center; color: var(--color-faint); font-family: var(--font-ui); font-size: 13px; }
.mark-inline { width: 160px; max-width: 60%; margin: 8px auto 0; }
.mark-inline svg { width: 100%; height: auto; }
.two-col-figure > div:last-child .mark-inline { margin-top: 0; }
.figure figcaption {
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  color: var(--color-muted);
  line-height: 1.5;
  margin-top: 10px;
}
.figure figcaption .fig-num { color: var(--color-primary); font-weight: 600; margin-right: 6px; }
.band-dark .figure-body { background: transparent; border-color: var(--band-hairline); }

/* --------------------------------------------------------------------------
   14. CTA band
   -------------------------------------------------------------------------- */
.band-cta { padding-block: clamp(40px, 6vw, 72px); margin-top: auto; }
.band-cta .band-inner {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}
.band-cta h2 { border: 0; text-transform: none; letter-spacing: 0; font-size: clamp(24px, 1.4rem + 1vw, 32px); padding: 0; margin: 0 0 0.4em; }
.band-cta p { color: var(--band-muted); max-width: 56ch; margin: 0; }
.band-cta .btn-row { margin-top: 0; justify-content: flex-end; }
@media (max-width: 760px) {
  .band-cta .band-inner { grid-template-columns: minmax(0, 1fr); }
  .band-cta .btn-row { justify-content: flex-start; margin-top: 16px; }
}

/* --------------------------------------------------------------------------
   15. Footer
   -------------------------------------------------------------------------- */
.footer {
  border-top: var(--hairline);
  padding-block: 24px 32px;
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-faint);
}
.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
}
.footer a { color: var(--color-faint); }
.footer a:hover { color: var(--color-secondary); }
.footer-brand { display: inline-flex; align-items: center; gap: 10px; }
.footer-mark { width: 22px; height: 22px; flex-shrink: 0; }
.footer-mark svg { width: 100%; height: 100%; }
.footer-rights { font-size: 12px; letter-spacing: 0; text-transform: none; color: var(--color-faint); margin-top: 14px; line-height: 1.5; }
.footer-rights p { max-width: 80ch; margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; list-style: none; margin: 0; padding: 0; }
.footer-links li { margin: 0; }

/* portraits */
.with-portrait { display: grid; grid-template-columns: 200px minmax(0, 1fr); gap: 28px; align-items: start; }
.portrait { display: block; width: 200px; max-width: 100%; height: auto; border-radius: 6px; border: var(--hairline); background: #fff; }
.portrait-sm { width: 96px; height: 96px; border-radius: 50%; object-fit: cover; }
.with-portrait:has(.portrait-sm) { grid-template-columns: 96px minmax(0, 1fr); gap: 20px; align-items: center; }
.band-dark .portrait { border-color: var(--band-hairline); }
@media (max-width: 560px) {
  .with-portrait { grid-template-columns: minmax(0, 1fr); }
  .portrait { width: 160px; }
  .with-portrait:has(.portrait-sm) { grid-template-columns: 96px minmax(0, 1fr); }
}

/* --------------------------------------------------------------------------
   16. Papers: header, TOC, prose, references
   -------------------------------------------------------------------------- */
.paper-header {
  padding-block: var(--section-y) 28px;
  border-bottom: var(--rule-header);
  margin-bottom: 40px;
}
.paper-header h1 { max-width: 24ch; margin-bottom: 0.3em; }
.paper-header .subtitle {
  font-size: 21px;
  line-height: 1.4;
  color: var(--color-muted);
  max-width: 56ch;
  margin: 0 0 20px;
}
.paper-meta-row { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 12px 24px; }
.btn-print { padding: 9px 14px; font-size: 12px; }
.paper-note { font-size: var(--fs-small); color: var(--color-muted); margin: -0.8em 0 2em; }
.paper-note p { margin-bottom: 0.6em; }
.paper-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 0;
  font-family: var(--font-ui);
  font-size: var(--fs-caption);
  color: var(--color-muted);
  letter-spacing: 0.02em;
}
.paper-meta > span:not(:last-child)::after { content: "\00b7"; margin: 0 10px; color: var(--color-faint); }

.paper-layout {
  padding-bottom: var(--section-y);
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: clamp(28px, 5vw, 64px);
  align-items: start;
}
@media (max-width: 960px) {
  .paper-layout { grid-template-columns: minmax(0, 1fr); }
}

.toc {
  position: sticky;
  top: calc(var(--nav-h) + 24px);
  font-family: var(--font-ui);
  font-size: 13px;
  line-height: 1.45;
  border-top: var(--rule-accent);
  padding-top: 12px;
  max-height: calc(100vh - var(--nav-h) - 48px);
  overflow-y: auto;
}
.toc-title {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: var(--track-eyebrow);
  text-transform: uppercase;
  color: var(--color-faint);
  margin: 0 0 10px;
}
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { margin: 0; }
.toc li::marker { content: none; }
.toc a {
  display: block;
  color: var(--color-primary);
  padding: 5px 0;
  border-bottom: var(--hairline);
}
.toc a:hover { color: var(--color-secondary); text-decoration: none; }
.toc a.is-active { color: var(--color-secondary); font-weight: 600; }
.toc ul ul a { padding-left: 14px; font-size: 12px; color: var(--color-muted); }
@media (max-width: 960px) {
  .toc { position: static; max-height: none; margin-bottom: 32px; border-bottom: var(--hairline); padding-bottom: 12px; }
  .toc ul ul { display: none; }
}

.prose {
  max-width: var(--prose-max);
  font-size: var(--fs-body);
  line-height: var(--lh-paper);
}
.prose p { margin-bottom: 1.1em; }
.prose h2 {
  margin-top: 2.4em;
  font-size: var(--fs-h2);
  scroll-margin-top: calc(var(--nav-h) + 24px);
}
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin-top: 1.8em; scroll-margin-top: calc(var(--nav-h) + 24px); }
.prose .figure, .prose .table-scroll, .prose .callout { max-width: 100%; }
.prose ul, .prose ol { margin-bottom: 1.2em; }
.prose .abstract {
  font-size: var(--fs-body);
  padding: 20px 24px;
  background: var(--color-callout);
  border-left: 4px solid var(--color-accent);
  margin: 0 0 2em;
}
.prose .abstract .callout-label { color: var(--color-accent); }
.prose sup { font-size: 0.7em; line-height: 0; }

.refs {
  font-size: var(--fs-small);
  line-height: 1.5;
}
.refs h2 { margin-top: 2.4em; }
.refs ul { list-style: none; padding: 0; margin: 0; }
.refs ul li { padding-left: 2em; text-indent: -2em; margin: 0 0 0.6em; }
.refs ol { list-style: decimal; padding-left: 2em; margin: 0; }
.refs ol li { padding-left: 0.4em; margin: 0 0 0.6em; }
.refs ol li::marker { color: var(--color-primary); font-weight: 600; font-variant-numeric: tabular-nums; }
.refs p { padding-left: 2em; text-indent: -2em; margin: 0 0 0.6em; }
.refs a { word-break: break-word; }

/* --------------------------------------------------------------------------
   17. Misc helpers
   -------------------------------------------------------------------------- */
.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}
.skip-link {
  position: absolute;
  left: 8px; top: -60px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 12px;
  z-index: 100;
  font-family: var(--font-ui);
  font-size: 13px;
}
.skip-link:focus { top: 8px; }
.rule-accent { height: 2px; background: var(--color-accent); border: 0; width: 56px; margin: 0 0 20px; }
.tag {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-secondary);
  border: 1px solid var(--color-hairline);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}
.contact-list { list-style: none; padding: 0; }
.contact-list li { margin-bottom: 0.4em; }
.contact-list li::marker { content: none; }

/* --------------------------------------------------------------------------
   18. Motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

/* --------------------------------------------------------------------------
   19. Print (papers)
   -------------------------------------------------------------------------- */
@media print {
  @page { margin: 22mm 20mm; }
  body { background: #fff; color: #000; font-size: 11pt; }
  .page { max-width: none; background: #fff; }
  .nav, .nav-toggle, .band-cta, .skip-link, .toc, .btn-row, .btn-print { display: none !important; }
  .paper-header { border-bottom: 2px solid #071E3D; }
  .figure-wide { overflow: visible; }
  .figure-scroll { min-width: 0; }
  .refs { font-size: 9.5pt; }
  .abstract { background: #F1F5F8 !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  .paper-layout { display: block; }
  .prose { max-width: none; line-height: 1.5; }
  .wrap { padding-inline: 0; max-width: none; }
  h2, h3 { break-after: avoid; }
  .figure, table, .callout { break-inside: avoid; }
  .table-scroll { overflow: visible; }
  .table-scroll table { min-width: 0; }
  thead th { background: var(--color-primary) !important; color: #fff !important; -webkit-print-color-adjust: exact; print-color-adjust: exact; }
  a { color: inherit; text-decoration: none; }
  .footer { border-top: var(--rule-header); }
}