/* ==========================================================================
   FluentFox — Document CSS
   Design tokens, typography, layout and component styles for the White Paper
   ========================================================================== */

/* ── Document Design Tokens ────────────────────────────────────────────── */
.doc-page {
  /* Colors */
  --paper-pure:  #ffffff;
  --paper:       #fbf8f3;
  --ink:         #1a1614;
  --ink-soft:    #2c2520;
  --body:        #3a322d;
  --muted:       #6b6057;
  --cream:       #f4ede4;
  --rule:        #d9cfbf;
  --rule-soft:   #e8dfd0;
  --accent:      #c97d1a;
  --accent-soft: #f5a94a;

  /* Typography */
  --serif: "Source Serif 4", Georgia, serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, Menlo, monospace;

  /* Layout */
  --doc-max-w:   720px;
  --page-max-w:  1200px;
  --sidebar-w:   220px;
  --gap:         80px;

  font-family: var(--serif);
  color: var(--body);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

/* ── Topbar ────────────────────────────────────────────────────────────── */
.doc-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 48px;
  height: 44px;
/*  background: var(--paper);*/
/*  border-bottom: 1px solid var(--rule);*/
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  position: sticky;
  top: 60px;
  z-index: 90;
}

.doc-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
}

.doc-breadcrumb a {
/*  color: var(--muted);*/
  text-decoration: none;
}

/*.doc-breadcrumb a:hover { color: var(--ink); }*/

.doc-breadcrumb-sep {
/*  color: var(--rule);*/
}

.doc-breadcrumb-current {
/*  color: var(--ink);*/
}

.doc-meta {
  display: flex;
  align-items: center;
  gap: 20px;
}

/* ── Page Grid ─────────────────────────────────────────────────────────── */
.doc-page-grid {
  max-width: var(--page-max-w);
  margin: 0 auto;
  padding: 80px 48px 120px;
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  gap: var(--gap);
  align-items: start;
}

/* ── Sidebar / TOC ─────────────────────────────────────────────────────── */
.doc-toc {
  position: sticky;
  top: calc(60px + 44px + 32px);
  max-height: calc(100vh - 60px - 44px - 80px);
  overflow-y: auto;
}

.doc-toc-heading {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.doc-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
}

.doc-toc-list li {
  counter-increment: toc;
}

.doc-toc-list a {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 400;
/*  color: var(--muted);*/
  text-decoration: none;
  padding: 5px 0;
  border-left: 2px solid transparent;
  padding-left: 10px;
  transition: color 0.15s, border-color 0.15s;
}

.doc-toc-list a::before {
  content: counter(toc) ".";
  font-family: var(--mono);
  font-size: 10px;
  color: var(--rule);
  min-width: 18px;
}

.doc-toc-list a:hover {
/*  color: var(--ink);*/
}

.doc-toc-list a.active {
  color: var(--accent);
  font-weight: 600;
  border-left-color: var(--accent);
}

/* Sub-items */
.doc-toc-sub {
  list-style: none;
  padding-left: 26px;
  margin: 0;
}

.doc-toc-sub a {
  font-size: 12px;
  padding: 3px 0;
  border-left: none;
  padding-left: 0;
}

.doc-toc-sub a::before { display: none; }

/* ── Article ───────────────────────────────────────────────────────────── */
.doc-article {
  max-width: var(--doc-max-w);
  min-width: 0;
}

/* ── Masthead / Cover ──────────────────────────────────────────────────── */
.doc-masthead {
  padding-bottom: 48px;
/*  border-bottom: 1px solid var(--rule);*/
  margin-bottom: 48px;
}

.doc-masthead-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
/*  color: var(--accent);*/
  margin-bottom: 20px;
}

.doc-title {
  font-family: var(--serif);
  font-size: 56px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.025em;
/*  color: var(--ink);*/
  margin: 0 0 16px;
}

.doc-subtitle {
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 400;
  font-style: italic;
  line-height: 1.3;
/*  color: var(--ink-soft);*/
  margin: 0 0 32px;
}

.doc-colophon {
  display: grid;
  grid-template-columns: auto auto auto;
  gap: 24px 48px;
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
/*  color: var(--muted);*/
}

.doc-colophon span strong {
  display: block;
/*  color: var(--body);*/
  font-weight: 600;
  margin-bottom: 2px;
}

/* ── Abstract ──────────────────────────────────────────────────────────── */
.doc-abstract {
/*  background: var(--cream);*/
  border-left: 3px solid var(--accent);
  padding: 28px 32px;
  border-radius: 0 4px 4px 0;
  margin-bottom: 40px;
}

.doc-abstract-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
}

.doc-abstract p {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
/*  color: var(--body);*/
  margin: 0 0 1.2em;
  hyphens: auto;
  text-wrap: pretty;
}

.doc-abstract p:last-child { margin-bottom: 0; }

/* Drop cap on first paragraph */
.doc-abstract p:first-of-type::first-letter {
  font-family: var(--serif);
  font-size: 64px;
  font-weight: 700;
  line-height: 0.9;
  float: left;
  margin: 4px 8px 0 0;
  color: var(--accent);
}

/* ── Body Typography ───────────────────────────────────────────────────── */
.doc-article p {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
/*  color: var(--body);*/
  margin: 0 0 1.2em;
  hyphens: auto;
  text-wrap: pretty;
}

.doc-article p.lede {
  font-size: 20px;
  line-height: 1.6;
/*  color: var(--ink-soft);*/
}

.doc-article h4 {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
/*  color: var(--ink);*/
  margin: 2em 0 0.6em;
}

/* ── Definition List ───────────────────────────────────────────────────── */
.doc-defs {
  margin: 0 0 2em;
  padding: 0;
}

.doc-defs div {
  padding: 16px 0;
/*  border-bottom: 1px solid var(--rule-soft);*/
}

.doc-defs dt {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}

.doc-defs dd {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
/*  color: var(--body);*/
  margin: 0;
}

/* ── Section Heading ───────────────────────────────────────────────────── */
.doc-section {
  margin-top: 80px;
  padding-top: 32px;
/*  border-top: 1px solid var(--rule);*/
}

.doc-section-eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.doc-section-h2 {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
/*  color: var(--ink);*/
  margin: 0 0 12px;
}

.doc-section-deck {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 400;
  font-style: italic;
  line-height: 1.5;
  color: var(--muted);
  margin-bottom: 32px;
}

/* ── Researcher Entry ──────────────────────────────────────────────────── */
.doc-researcher {
  margin-bottom: 40px;
  padding-bottom: 40px;
/*  border-bottom: 1px solid var(--rule-soft);*/
}

.doc-researcher:last-of-type {
  border-bottom: none;
}

.doc-researcher-who {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 4px;
}

.doc-researcher-theory {
  font-family: var(--serif);
  font-size: 20px;
  font-weight: 400;
  font-style: italic;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.doc-researcher-body {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
/*  color: var(--body);*/
  margin-bottom: 12px;
}

.doc-researcher-cite {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ── Numbered Principle ────────────────────────────────────────────────── */
.doc-principle {
  margin-bottom: 40px;
}

.doc-principle-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 12px;
}

.doc-principle-num {
  font-family: var(--serif);
  font-size: 36px;
  font-weight: 700;
  font-style: italic;
  color: var(--accent);
  line-height: 1;
  flex-shrink: 0;
}

.doc-principle-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
/*  color: var(--ink);*/
  margin: 0;
}

.doc-principle-body {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
/*  color: var(--body);*/
}

.doc-principle-body p {
  margin: 0 0 1.2em;
}

.doc-principle-body p:last-child { margin-bottom: 0; }

/* ── Example Call-out ──────────────────────────────────────────────────── */
.doc-example {
/*  background: var(--cream);*/
  border-left: 3px solid var(--accent-soft);
  padding: 16px 20px;
  border-radius: 0 4px 4px 0;
  margin-top: 16px;
}

.doc-example-label {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
/*  color: var(--accent-soft);*/
  margin-bottom: 8px;
}

.doc-example p {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.6;
/*  color: var(--body);*/
  margin: 0;
}

/* ── Two-Part Box ──────────────────────────────────────────────────────── */
.doc-twopart {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
/*  background: var(--rule);*/
/*  border: 1px solid var(--rule);*/
  border-radius: 6px;
  overflow: hidden;
  margin: 24px 0;
}

.doc-twopart-cell {
/*  background: var(--paper-pure);*/
  padding: 24px 28px;
}

.doc-twopart-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.doc-twopart-title {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 700;
/*  color: var(--ink);*/
  margin-bottom: 8px;
}

.doc-twopart-body {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
/*  color: var(--body);*/
}

/* ── Level Entry ───────────────────────────────────────────────────────── */
.doc-level {
  margin-bottom: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--rule-soft);
}

.doc-level:last-of-type { border-bottom: none; }

.doc-level-header {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 12px;
}

.doc-level-num {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent);
  flex-shrink: 0;
}

.doc-level-title {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
/*  color: var(--ink);*/
  margin: 0;
}

.doc-level-intro {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.7;
  color: var(--body);
  margin-bottom: 16px;
}

.doc-level-bullets {
  padding-left: 1.5em;
  margin: 0 0 16px;
}

.doc-level-bullets li {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
/*  color: var(--body);*/
  margin-bottom: 6px;
}

.doc-level-metas {
  margin: 12px 0;
}

.doc-level-meta {
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
/*  color: var(--body);*/
  margin-bottom: 4px;
}

.doc-level-stages {
  margin: 12px 0;
  padding-left: 0;
  list-style: none;
}

.doc-level-stage {
  display: flex;
  gap: 12px;
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1.65;
/*  color: var(--body);*/
  margin-bottom: 4px;
}

.doc-level-stage-code {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  flex-shrink: 0;
  min-width: 28px;
  padding-top: 3px;
}

/* ── Dialogue Table ────────────────────────────────────────────────────── */
.doc-dialogue {
/*  background: var(--paper-pure);*/
/*  border: 1px solid var(--rule);*/
  border-radius: 6px;
  overflow: hidden;
  margin: 24px 0;
}

.doc-dialogue-label {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
/*  color: var(--muted);*/
  padding: 12px 20px;
/*  background: var(--cream);*/
  border-bottom: 1px solid var(--rule);
}

.doc-dialogue-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  align-items: start;
  padding: 12px 20px;
  border-bottom: 1px dashed var(--rule-soft);
}

.doc-dialogue-row:last-child { border-bottom: none; }

.doc-dialogue-it {
  font-family: var(--serif);
  font-size: 17px;
  font-weight: 600;
/*  color: var(--ink);*/
  display: block;
}

.doc-dialogue-en {
  font-family: var(--serif);
  font-size: 14px;
  font-weight: 400;
  font-style: italic;
/*  color: var(--muted);*/
  display: block;
  margin-top: 2px;
}

.doc-dialogue-tag {
  font-family: var(--mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
/*  color: var(--rule);*/
  white-space: nowrap;
  padding-top: 4px;
}

/* ── Pull Quote ────────────────────────────────────────────────────────── */
.doc-pullquote {
  border-left: 3px solid var(--accent);
  padding: 12px 0 12px 24px;
  margin: 32px 0;
}

.doc-pullquote p {
  font-family: var(--serif);
  font-size: 24px;
  font-weight: 400;
  font-style: italic;
  line-height: 1.4;
/*  color: var(--ink-soft);*/
  margin: 0;
}

/* ── Document Footer ───────────────────────────────────────────────────── */
.doc-foot {
  border-top: 1px solid var(--rule);
  padding: 32px 0 0;
  margin-top: 80px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.doc-foot-version {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
/*  color: var(--muted);*/
}

.doc-foot-return {
  font-family: var(--sans);
  font-size: 14px;
  font-weight: 500;
/*  color: var(--muted);*/
  text-decoration: none;
  transition: color 0.15s;
}

.doc-foot-return:hover { color: var(--accent); }

/* ── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 999px) {
  .doc-page-grid {
    grid-template-columns: 1fr;
    padding: 48px 32px 80px;
    gap: 40px;
  }

  .doc-toc {
    position: static;
    max-height: none;
  }

  .doc-topbar {
    padding: 0 32px;
  }
}

@media (max-width: 719px) {
  .doc-twopart {
    grid-template-columns: 1fr;
  }

  .doc-dialogue-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 559px) {
  .doc-topbar {
    flex-direction: column;
    height: auto;
    padding: 10px 20px;
    gap: 6px;
  }

  .doc-page-grid {
    padding: 32px 20px 60px;
  }

  .doc-title {
    font-size: 36px;
  }

  .doc-colophon {
    grid-template-columns: 1fr;
    gap: 12px;
  }
}

/* ── Print ─────────────────────────────────────────────────────────────── */
@media print {
  .mkt-nav,
  .doc-topbar,
  .doc-toc,
  .doc-foot { display: none !important; }

/*  .doc-page { background: white; }*/

  .doc-page-grid {
    display: block;
    max-width: none;
    padding: 0;
  }

  .doc-article {
    max-width: none;
  }

  body {
    font-size: 11pt;
    color: black;
  }

  .doc-level,
  .doc-principle,
  .doc-researcher,
  .doc-example,
  .doc-twopart,
  .doc-dialogue,
  .doc-pullquote { break-inside: avoid; }

  .doc-section-h2,
  .doc-principle-title,
  .doc-level-title { break-after: avoid; }
}