/* ==========================================================
   AI in Advisory Playbook — Arup
   Shared base styles (variables · nav · sections · reveal · footer)
   ========================================================== */

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --red: #E61E28; --red-dark: #c4161f; --red-light: #fef2f2; --red-glow: rgba(230,30,40,0.07);
  --navy: #0f1729; --navy-soft: #1e293b; --slate: #475569; --muted: #64748b;
  --border: #e2e8f0; --border-light: #f1f5f9; --bg: #ffffff; --bg-alt: #f8fafc;
  --teal: #0d9488; --teal-light: #ccfbf1; --blue: #3b82f6; --blue-light: #eff6ff;
  --amber: #f59e0b; --amber-light: #fffbeb; --violet: #7c3aed; --violet-light: #f5f3ff;
  --green: #16a34a; --green-light: #f0fdf4;

  --font-display: 'Outfit', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);

  --shadow-sm: 0 1px 3px rgba(15,23,41,0.04);
  --shadow-md: 0 4px 16px rgba(15,23,41,0.06);
  --shadow-lg: 0 8px 32px rgba(15,23,41,0.08);
  --shadow-xl: 0 16px 48px rgba(15,23,41,0.1);
  --shadow-red: 0 8px 32px rgba(230,30,40,0.12);

  --radius: 12px; --radius-lg: 16px; --radius-xl: 24px;
}

/* Shared press-state: any element with a hover-lift should also compress slightly on press.
   Apple's Response principle — feedback starts on press, not on release. */
.arsenal-card:active,
.ws-tab:active,
.nav-links a:active,
.addin-notify:active,
.footer-version:active {
  transform: scale(0.97);
  transition-duration: .08s;
}
@media (prefers-reduced-motion: reduce) {
  .nav-links a:active,
  .footer-version:active { transform: none; }
  .nav { transition: none; }
}

html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font-body);
  color: var(--navy);
  background: var(--bg);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ─── Reveal-on-scroll ─── */
.rv { opacity: 0; transform: translateY(24px); transition: opacity .6s var(--ease-out), transform .6s var(--ease-out); }
.rv.vis { opacity: 1; transform: translateY(0); }
.rv-d1 { transition-delay: .08s }
.rv-d2 { transition-delay: .16s }
.rv-d3 { transition-delay: .24s }
.rv-d4 { transition-delay: .32s }

@keyframes fadeUp { from { opacity: 0; transform: translateY(10px) } to { opacity: 1; transform: translateY(0) } }

/* ─── Nav ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  background: rgba(255,255,255,.82);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid transparent;
  transition: border-color .3s, box-shadow .3s, background-color .2s var(--ease-out);
}
@media (prefers-contrast: more) {
  .nav { background: #ffffff; border-bottom: 2px solid var(--navy); }
  .ws-tabs { background: #ffffff; border: 2px solid var(--navy); }
}
.nav.scrolled { border-bottom-color: var(--border); box-shadow: var(--shadow-sm); }
.nav.is-scrolled { box-shadow: var(--shadow-md); background-color: rgba(255,255,255,.92); }
@media (prefers-reduced-transparency: reduce) {
  .nav, .nav.is-scrolled { backdrop-filter: none; background: #fdfdfe; }
}

.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  height: 58px; max-width: 1280px; margin: 0 auto; padding: 0 24px;
}
.nav-brand { display: flex; align-items: center; gap: 10px; color: var(--navy); cursor: pointer; flex-shrink: 0; }
.nav-logo {
  height: 26px;
  width: auto;
  display: block;
  flex-shrink: 0;
}
.nav-title { font-family: var(--font-display); font-weight: 600; font-size: .875rem; letter-spacing: 0; white-space: nowrap; }
.nav-title .accent { color: var(--red); }

/* Version pill — lives in the page footer, shows tooltip on hover */
.footer-sep {
  opacity: .55;
  margin: 0 2px;
}
.footer-version {
  position: relative;
  display: inline-flex; align-items: center;
  font-family: var(--font-mono, 'JetBrains Mono', monospace);
  font-size: .65625rem; font-weight: 700; letter-spacing: .2em;
  color: var(--navy-soft, #64748b);
  background: var(--bg-alt, #f1f5f9);
  border: 1px solid var(--border, #e2e8f0);
  border-radius: 100px;
  padding: 2px 9px;
  margin-left: 4px;
  cursor: help;
  user-select: none;
  transition: background .2s, color .2s, border-color .2s, transform .2s var(--ease-out);
  white-space: nowrap;
  vertical-align: 1px;
}
.footer-version:hover,
.footer-version:focus-visible {
  background: var(--red, #E61E28);
  color: white;
  border-color: var(--red, #E61E28);
  outline: none;
}
.footer-version[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 10px);
  left: 50%; transform: translateX(-50%) translateY(4px);
  background: #0f172a; color: white;
  font-family: var(--font-display, 'Outfit'), system-ui, sans-serif;
  font-size: .6875rem; font-weight: 500; letter-spacing: 0;
  padding: 6px 10px;
  border-radius: 6px;
  white-space: nowrap;
  box-shadow: 0 10px 22px -6px rgba(15,23,42,.25);
  opacity: 0; pointer-events: none;
  transition: opacity .15s, transform .15s;
  z-index: 260;
}
.footer-version[data-tooltip]::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%; transform: translateX(-50%) rotate(45deg);
  width: 8px; height: 8px;
  background: #0f172a;
  opacity: 0; pointer-events: none;
  transition: opacity .15s;
  z-index: 259;
}
.footer-version:hover::after,
.footer-version:focus-visible::after {
  opacity: 1; transform: translateX(-50%) translateY(0);
}
.footer-version:hover::before,
.footer-version:focus-visible::before {
  opacity: 1;
}
@media (max-width: 540px) {
  .footer-version { font-size: .59375rem; padding: 1px 7px; }
}

.nav-links {
  position: relative;
  display: flex; align-items: center;
  gap: 2px;
  list-style: none;
  flex-wrap: nowrap;
  white-space: nowrap;
}
.nav-links a {
  position: relative; z-index: 2;
  display: inline-flex; align-items: center;
  padding: 8px 12px 10px; font-size: .8125rem; font-weight: 500;
  color: var(--slate);
  border-radius: 8px;
  white-space: nowrap;
  transition: color .2s var(--ease-out), background .2s var(--ease-out), transform .2s var(--ease-out);
  cursor: pointer;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--red);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .25s var(--ease-out);
}
.nav-links a:hover { color: var(--navy); background: var(--bg-alt); }
.nav-links a:hover::after { transform: scaleX(0.4); }

/* Active page — red text, soft red pill, persistent underline rail */
.nav-links a.active,
.nav-links a[aria-current="page"] {
  color: var(--red);
  background: var(--red-light, rgba(230, 30, 40, 0.08));
  font-weight: 700;
}
.nav-links a.active::after,
.nav-links a[aria-current="page"]::after {
  transform: scaleX(1);
}
.nav-links a:focus-visible {
  outline: 2px solid var(--red); outline-offset: 2px;
}

.nav-mobile { display: none; background: none; border: none; cursor: pointer; padding: 6px; color: var(--navy); }
.nav-mobile svg { width: 22px; height: 22px; }

@media (max-width: 1180px) {
  .nav-title { display: none; }
}
@media (max-width: 980px) {
  .nav-mobile { display: block; }
  .nav-title { display: inline; }
  .nav-links {
    display: none; position: absolute; top: 58px; left: 0; right: 0;
    background: white; border-bottom: 1px solid var(--border);
    flex-direction: column; padding: 12px 24px; gap: 4px;
    white-space: normal;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 14px; border-radius: 6px; }
  .nav-links a::after { display: none; }
  /* Active page in mobile dropdown — red-light pill + left rail */
  .nav-links a.active,
  .nav-links a[aria-current="page"] {
    background: var(--red-light, rgba(230, 30, 40, 0.08));
    color: var(--red);
    box-shadow: inset 3px 0 0 var(--red);
    font-weight: 700;
  }
}

/* ─── Section primitives ─── */
.sec { padding: 88px 24px; }
.sec-alt { background: var(--bg-alt); }
.sec-tight { padding-top: 70px; padding-bottom: 70px; }
@media (max-width: 720px) { .sec-tight { padding-top: 56px; padding-bottom: 56px; } }

.sec-hd { text-align: center; margin-bottom: 52px; }
.sec-label {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: .6875rem; font-weight: 600;
  text-transform: uppercase; letter-spacing: .2em; color: var(--red);
  margin-bottom: 12px;
}
.sec-label::before { content: ''; width: 16px; height: 2px; background: var(--red); border-radius: 1px; }
.sec-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.375rem);
  font-weight: 700; letter-spacing: -.03em; line-height: 1.15;
  color: var(--navy); margin-bottom: 12px;
}
.sec-desc { font-size: .9375rem; color: var(--slate); max-width: 540px; margin: 0 auto; line-height: 1.7; }

/* ─── Sub-page hero (re-used on chapter pages) ─── */
.sub-hero { padding: 110px 24px 56px; position: relative; overflow: hidden; }
.sub-hero::before {
  content: ''; position: absolute; top: -20%; right: -10%;
  width: 500px; height: 500px;
  background: radial-gradient(circle, var(--red-glow) 0%, transparent 70%);
  pointer-events: none;
}
.sub-hero-inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
}
.sub-back {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: .8125rem; font-weight: 500; color: var(--muted);
  margin-bottom: 18px; cursor: pointer; transition: color .2s;
}
.sub-back:hover { color: var(--red); }
.sub-back svg { width: 15px; height: 15px; }
.sub-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.875rem, 3.8vw, 3rem);
  font-weight: 700; line-height: 1.1; letter-spacing: -.03em;
  color: var(--navy); margin-bottom: 14px;
}
.sub-hero h1 span { color: var(--red); }
.sub-hero-desc { font-size: 1rem; color: var(--slate); line-height: 1.7; max-width: 440px; }

@media (max-width: 880px) {
  .sub-hero-inner { grid-template-columns: 1fr; gap: 32px; }
}

/* ─── Closing band (dark) ─── */
.closing {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: white; padding: 88px 24px; text-align: center;
}
.closing-inner { max-width: 720px; margin: 0 auto; }
.closing h2 {
  font-family: var(--font-display);
  font-size: clamp(1.375rem, 2.6vw, 2rem);
  font-weight: 700; letter-spacing: -.03em; line-height: 1.25;
  margin: 18px 0 28px;
}
.cl-formula {
  display: inline-flex; align-items: center; gap: 14px;
  font-family: var(--font-display); font-weight: 700; font-size: 1.125rem;
  padding: 14px 24px; background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1); border-radius: 12px;
  margin-bottom: 24px;
}
.cl-formula .plus { color: rgba(255,255,255,.4); font-weight: 400; }

/* ─── Footer ─── */
.footer {
  padding: 32px 24px;
  text-align: center;
  font-size: .75rem;
  color: var(--muted);
  border-top: 1px solid var(--border);
  background: var(--bg);
}

/* ─── Tag (re-used) ─── */
.tag {
  display: inline-block;
  padding: 3px 10px; background: var(--bg-alt);
  border-radius: 5px; font-size: .75rem; font-weight: 500; color: var(--navy-soft);
}


/* ==========================================================
   Cmd-K Search palette (loaded everywhere via core.js)
   ========================================================== */

/* Trigger button injected into .nav-inner — icon only, opens overlay */
.pb-search-trigger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  padding: 0;
  margin-right: 8px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  color: var(--slate);
  transition: background .2s var(--ease-out), border-color .2s var(--ease-out), color .2s var(--ease-out);
}
.pb-search-trigger:hover {
  background: var(--bg-alt);
  border-color: var(--border);
  color: var(--red);
}
.pb-search-trigger svg { width: 17px; height: 17px; }

/* Showcase page: dark trigger */
body.showcase-page .pb-search-trigger { color: rgba(255, 255, 255, 0.7); }
body.showcase-page .pb-search-trigger:hover {
  background: rgba(255, 255, 255, 0.12);
  color: white;
  border-color: rgba(255, 255, 255, 0.18);
}

/* Modal overlay */
.pb-search-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 14vh 20px 20px;
  background: rgba(15, 23, 41, 0.55);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  animation: pb-search-fade .18s var(--ease-out);
}
@media (prefers-reduced-transparency: reduce) {
  .pb-search-overlay { backdrop-filter: none; background: #0f1729; }
}
@keyframes pb-search-fade { from { opacity: 0; } to { opacity: 1; } }

.pb-search-modal {
  width: min(680px, 100%);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  border: 1px solid var(--border);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 70vh;
}

.pb-search-input-wrap {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}
.pb-search-input-wrap > svg {
  width: 18px;
  height: 18px;
  color: var(--muted);
  flex-shrink: 0;
}
.pb-search-input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  color: var(--navy);
  padding: 4px 0;
}
.pb-search-input::placeholder { color: var(--muted); font-weight: 400; }
.pb-search-esc {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  padding: 2px 8px;
  font-family: var(--font-mono);
  font-size: .625rem;
  color: var(--muted);
  cursor: pointer;
}

.pb-search-results {
  flex: 1;
  overflow-y: auto;
  padding: 8px 0;
  scrollbar-width: thin;
}
.pb-search-results::-webkit-scrollbar { width: 6px; }
.pb-search-results::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

.pb-search-result {
  display: block;
  padding: 12px 20px;
  text-decoration: none;
  color: var(--navy);
  border-left: 3px solid transparent;
  transition: background .15s, border-color .15s;
}
.pb-search-result.active,
.pb-search-result:hover {
  background: var(--bg-alt);
  border-left-color: var(--red);
}
.pb-search-result-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.pb-search-title {
  font-family: var(--font-display);
  font-size: .875rem;
  font-weight: 600;
  color: var(--navy);
}
.pb-search-parent {
  font-size: .75rem;
  color: var(--muted);
  font-weight: 500;
}
.pb-search-sep { color: var(--muted); opacity: .5; font-weight: 400; font-size: .75rem; }

.pb-search-summary {
  font-size: .75rem;
  color: var(--slate);
  margin-top: 4px;
  line-height: 1.45;
  padding-left: 50px;
}

.pb-search-type {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: .5625rem;
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: .2em;
  flex-shrink: 0;
}
.pb-search-type-page,
.pb-search-type-chapter { background: var(--red-light); color: var(--red); }
.pb-search-type-section { background: var(--bg-alt); color: var(--slate); }
.pb-search-type-tool    { background: #eff6ff; color: #3b82f6; }
.pb-search-type-workflow{ background: #ccfbf1; color: #0d9488; }
.pb-search-type-case    { background: #fffbeb; color: #92400e; }

.pb-search-empty {
  padding: 36px 20px;
  text-align: center;
  color: var(--muted);
  font-size: .8125rem;
}

.pb-search-footer {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 18px;
  padding: 10px 18px;
  background: var(--bg-alt);
  border-top: 1px solid var(--border-light);
  font-size: .6875rem;
  color: var(--muted);
  font-family: var(--font-mono);
  flex-shrink: 0;
}
.pb-search-footer kbd {
  display: inline-block;
  background: white;
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 6px;
  margin: 0 2px;
  font-family: var(--font-mono);
  font-size: .625rem;
  color: var(--slate);
}

@media (max-width: 720px) {
  .pb-search-overlay { padding-top: 8vh; }
  .pb-search-summary { padding-left: 0; margin-top: 6px; }
  .pb-search-footer { display: none; }
}

/* ════════════════════════════════════════════════════════════
   Reading progress bar — slim red gradient line at the top
   ════════════════════════════════════════════════════════════ */
#pbReadProgress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--red) 0%, #f97316 60%, #fb7185 100%);
  z-index: 1000;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(230,30,40,.45);
  transition: width 0.08s linear;
}
@media (prefers-reduced-motion: reduce) {
  #pbReadProgress { transition: none; }
}

/* ════════════════════════════════════════════════════════════
   Chapter prev/next footer (auto-injected on chapter pages)
   ════════════════════════════════════════════════════════════ */
.pb-chapter-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  max-width: 1100px;
  margin: 56px auto 24px;
  padding: 0 24px;
}
.pb-chapter-nav-prev,
.pb-chapter-nav-next {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 22px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 14px;
  text-decoration: none;
  color: var(--navy);
  box-shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.05);
  transition: transform .25s cubic-bezier(0.2, 0.7, 0.2, 1), border-color .25s, box-shadow .3s;
  min-height: 78px;
}
.pb-chapter-nav-prev:hover,
.pb-chapter-nav-next:hover {
  transform: translateY(-2px);
  border-color: var(--red);
  box-shadow: 0 1px 2px rgba(15,23,42,.04), 0 14px 32px rgba(230,30,40,.12);
}
.pb-chapter-nav-prev { justify-content: flex-start; }
.pb-chapter-nav-next { justify-content: flex-end; text-align: right; }
.pb-chapter-nav-prev svg,
.pb-chapter-nav-next svg {
  width: 18px;
  height: 18px;
  color: var(--red);
  flex-shrink: 0;
  transition: transform .25s cubic-bezier(0.2, 0.7, 0.2, 1);
}
.pb-chapter-nav-prev:hover svg { transform: translateX(-3px); }
.pb-chapter-nav-next:hover svg { transform: translateX(3px); }
.pb-chapter-nav-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.pb-chapter-nav-label {
  font-family: var(--font-mono);
  font-size: .625rem;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--muted);
}
.pb-chapter-nav-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: .9375rem;
  color: var(--navy);
  letter-spacing: 0;
  line-height: 1.3;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.pb-chapter-nav-spacer { display: block; }
@media (max-width: 720px) {
  .pb-chapter-nav { grid-template-columns: 1fr; }
  .pb-chapter-nav-spacer { display: none; }
  .pb-chapter-nav-next { justify-content: flex-start; text-align: left; }
}


/* Batch 4 — Accessibility additions */
:focus-visible {
  outline: 2px solid var(--red);
  outline-offset: 2px;
  border-radius: 4px;
}
@media (max-width: 420px) {
  .sub-hero h1, .home-hero h1 {
    font-size: clamp(2.25rem, 12vw, 3.5rem);
    line-height: 1.08;
  }
}

/* ════════════════════════════════════════════════════════════
   Glossary tooltips — .gloss spans + shared dark popover
   ════════════════════════════════════════════════════════════ */
.gloss {
  border-bottom: 1px dotted color-mix(in srgb, var(--slate) 60%, transparent);
  cursor: help;
  text-decoration: none;
  color: inherit;
  transition: color .2s, border-color .2s;
  outline-offset: 2px;
  border-radius: 2px;
}
.gloss::after {
  content: '\24D8'; /* ⓘ */
  font-size: .68em;
  margin-left: .15em;
  color: var(--red);
  opacity: .55;
  vertical-align: super;
  font-weight: 400;
  font-style: normal;
  transition: opacity .2s;
}
.gloss:hover,
.gloss:focus,
.gloss[data-gloss-active="true"] {
  border-bottom-color: var(--red);
  color: var(--red);
}
.gloss:hover::after,
.gloss:focus::after,
.gloss[data-gloss-active="true"]::after { opacity: 1; }

.gloss-tooltip {
  position: absolute;
  width: 300px;
  max-width: calc(100vw - 24px);
  padding: 12px 14px;
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-soft) 100%);
  color: white;
  font-family: var(--font-body);
  font-size: .8125rem;
  line-height: 1.55;
  font-style: normal;
  font-weight: 400;
  border-radius: 10px;
  box-shadow:
    0 8px 24px rgba(15,23,41,.20),
    0 4px 12px rgba(15,23,41,.12);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity .22s, visibility .22s, transform .22s cubic-bezier(0.2, 0.7, 0.2, 1);
  pointer-events: none;
  text-align: left;
}
.gloss-tooltip.measuring {
  opacity: 0;
  visibility: visible;
  pointer-events: none;
}
.gloss-tooltip.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  pointer-events: auto;
}
.gloss-tooltip::before {
  content: '';
  position: absolute;
  left: 50%;
  width: 10px;
  height: 10px;
  background: var(--navy-soft);
  transform: translateX(-50%) rotate(45deg);
  border-radius: 2px;
}
.gloss-tooltip:not(.below)::before { bottom: -5px; }
.gloss-tooltip.below::before { top: -5px; background: var(--navy); }

@media (prefers-reduced-motion: reduce) {
  .gloss-tooltip { transition: opacity .1s, visibility .1s; transform: none; }
}

/* ════════════════════════════════════════════════════════════
   Batch 6 — Scroll-fatigue fixes
   Sticky in-page TOC · collapsible sections · floating quick-nav
   ════════════════════════════════════════════════════════════ */

/* ── Floating draggable TOC ball + popover ── */
.pb-toc-ball {
  position: fixed;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--red) 0%, color-mix(in srgb, var(--red) 70%, #000) 100%);
  border: 3px solid white;
  color: white;
  cursor: grab;
  z-index: 90;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  box-shadow:
    0 1px 0 rgba(255,255,255,.18) inset,
    0 4px 14px rgba(230,30,40,.32),
    0 12px 32px rgba(230,30,40,.18),
    0 0 0 0 color-mix(in srgb, var(--red) 60%, transparent);
  transition: transform .2s cubic-bezier(0.2, 0.7, 0.2, 1),
              box-shadow .25s,
              left .12s ease-out,
              top .12s ease-out;
  touch-action: none;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}
.pb-toc-ball:hover { transform: scale(1.06); }
.pb-toc-ball:active,
.pb-toc-ball.pb-toc-dragging {
  cursor: grabbing;
  transition: box-shadow .25s;
  transform: scale(1.04);
}
.pb-toc-ball.pb-toc-dragging {
  box-shadow:
    0 1px 0 rgba(255,255,255,.18) inset,
    0 8px 24px rgba(230,30,40,.42),
    0 18px 48px rgba(230,30,40,.22);
}
.pb-toc-ball svg { width: 22px; height: 22px; }
.pb-toc-ball-count {
  position: absolute;
  top: -7px;
  right: -7px;
  min-width: 22px;
  height: 22px;
  padding: 0 5px;
  background: var(--navy);
  border: 2px solid white;
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: .625rem;
  font-weight: 700;
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
  line-height: 1;
}
@media (prefers-reduced-motion: no-preference) {
  .pb-toc-ball.pb-toc-active::after {
    content: '';
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid var(--red);
    opacity: 0;
    animation: pb-toc-pulse 2.4s ease-out infinite;
    pointer-events: none;
  }
  @keyframes pb-toc-pulse {
    0%   { opacity: 0.55; transform: scale(1); }
    70%  { opacity: 0;    transform: scale(1.35); }
    100% { opacity: 0;    transform: scale(1.35); }
  }
}

.pb-toc-panel {
  position: fixed;
  width: 300px;
  max-width: calc(100vw - 32px);
  max-height: 60vh;
  overflow-y: auto;
  background: white;
  border: 1px solid var(--border);
  border-radius: 14px;
  box-shadow:
    0 1px 0 rgba(255,255,255,.6) inset,
    0 8px 24px rgba(15,23,42,.18),
    0 4px 12px rgba(15,23,42,.10);
  z-index: 91;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px) scale(0.96);
  transform-origin: top right;
  transition: opacity .2s, transform .22s cubic-bezier(0.2, 0.7, 0.2, 1), visibility .22s;
}
.pb-toc-panel[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.pb-toc-panel-head {
  padding: 14px 18px 10px;
  font-family: var(--font-mono);
  font-size: .625rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .2em;
  color: var(--muted);
  border-bottom: 1px solid var(--border-light);
}
.pb-toc-panel ul {
  list-style: none;
  margin: 0;
  padding: 8px;
  display: flex;
  flex-direction: column;
  gap: 1px;
}
.pb-toc-panel li a {
  display: block;
  padding: 9px 12px;
  font-size: .8125rem;
  line-height: 1.45;
  color: var(--slate);
  border-radius: 6px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background .2s, color .2s, border-left-color .2s;
}
.pb-toc-panel li a:hover {
  background: var(--bg-alt);
  color: var(--navy);
}
.pb-toc-panel li.active a {
  color: var(--red);
  border-left-color: var(--red);
  background: rgba(230,30,40,.05);
  font-weight: 600;
}
@media (max-width: 720px) {
  .pb-toc-ball { width: 50px; height: 50px; border-width: 2px; }
  .pb-toc-ball svg { width: 20px; height: 20px; }
  .pb-toc-panel { width: calc(100vw - 24px); }
}
@media (prefers-reduced-motion: reduce) {
  .pb-toc-ball, .pb-toc-panel { transition: opacity .1s; }
  .pb-toc-ball:hover { transform: none; }
}

/* ── Collapsible sections (CSS-only via .pb-collapse) ── */
.pb-collapse > .container > .sec-hd {
  cursor: pointer;
  user-select: none;
  position: relative;
  padding-right: 40px;
  transition: opacity .2s;
}
.pb-collapse > .container > .sec-hd:hover { opacity: 0.85; }
.pb-collapse > .container > .sec-hd::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 8px;
  width: 11px;
  height: 11px;
  border-right: 2.5px solid var(--red);
  border-bottom: 2.5px solid var(--red);
  transform: translateY(-65%) rotate(45deg);
  transition: transform .25s ease;
  pointer-events: none;
}
.pb-collapse.is-collapsed > .container > .sec-hd::after {
  transform: translateY(-50%) rotate(-45deg);
}
.pb-collapse.is-collapsed > .container > *:not(.sec-hd) {
  display: none;
}
.pb-collapse.is-collapsed {
  padding-bottom: 36px;
}

/* "Expand all / Collapse all" toggle button */
.pb-collapse-controls {
  max-width: 1200px;
  margin: 0 auto 8px;
  padding: 0 24px;
  text-align: right;
}
.pb-collapse-toggle-all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 100px;
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--slate);
  cursor: pointer;
  transition: border-color .2s, color .2s;
}
.pb-collapse-toggle-all:hover {
  border-color: var(--red);
  color: var(--red);
}
.pb-collapse-toggle-all svg { width: 12px; height: 12px; }

/* ── Floating quick-nav (bottom-right) ── */
.pb-quicknav {
  position: fixed;
  right: 20px;
  bottom: 24px;
  z-index: 80;
  display: none;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .25s, transform .25s;
  pointer-events: none;
}
.pb-quicknav.visible {
  display: flex;
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.pb-quicknav button {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: white;
  border: 1px solid var(--border);
  color: var(--navy);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.05);
  transition: transform .2s, box-shadow .25s, border-color .25s, color .2s;
}
.pb-quicknav button:hover {
  transform: translateY(-2px);
  border-color: var(--red);
  color: var(--red);
  box-shadow: 0 8px 20px rgba(230,30,40,.18);
}
.pb-quicknav button svg { width: 18px; height: 18px; }
@media (max-width: 720px) { .pb-quicknav { display: none !important; } }

@media (prefers-reduced-motion: reduce) {
  .pb-toc li a,
  .pb-collapse > .container > .sec-hd::after,
  .pb-quicknav,
  .pb-quicknav button { transition: none !important; }
}

/* Legacy download dropdown — no longer rendered, kept hidden */
.pb-download-menu { display: none !important; }

.pb-download-menu {
  position: fixed;
  z-index: 200;
  background: white;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow:
    0 1px 0 rgba(255,255,255,.6) inset,
    0 8px 24px rgba(15,23,42,.16),
    0 4px 12px rgba(15,23,42,.10);
  min-width: 280px;
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-4px) scale(.98);
  transform-origin: top right;
  transition: opacity .18s, transform .2s cubic-bezier(0.2, 0.7, 0.2, 1), visibility .18s;
}
.pb-download-menu[data-open="true"] {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}
.pb-download-menu-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  width: 100%;
  padding: 10px 12px;
  background: transparent;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  text-align: left;
  transition: background .2s;
  font-family: var(--font-body);
}
.pb-download-menu-item:hover { background: var(--bg-alt); }
.pb-download-menu-item svg {
  width: 18px;
  height: 18px;
  color: var(--red);
  flex-shrink: 0;
  margin-top: 1px;
}
.pb-download-menu-text { flex: 1; }
.pb-download-menu-title {
  font-size: .8125rem;
  font-weight: 600;
  color: var(--navy);
  letter-spacing: 0;
  line-height: 1.3;
}
.pb-download-menu-sub {
  font-size: .6875rem;
  color: var(--muted);
  margin-top: 2px;
  line-height: 1.45;
}

/* ════════════════════════════════════════════════════════════
   PRINT styles — clean PDF output via browser's print dialog
   ════════════════════════════════════════════════════════════ */
@media print {
  /* Hide all interactive / floating chrome */
  .nav,
  .footer,
  .skip-link,
  #pbReadProgress,
  .pb-toc-ball,
  .pb-toc-panel,
  .pb-quicknav,
  .pb-search-trigger,
  .pb-search-overlay,
  .pb-collapse-controls,
  .pb-chapter-nav,
  .pb-download-menu,
  .gloss-tooltip,
  .home-cta-primary,
  .home-aud-pill,
  .bd-home-cta,
  .next-grid,
  .next-card {
    display: none !important;
  }

  /* Strip animation/transition for cleaner paint */
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    transform: none !important;
    box-shadow: none !important;
  }

  /* CRITICAL — force every reveal-on-scroll element to render.
     Without this, sections below the viewport (which never triggered
     IntersectionObserver) print as blank space. */
  .rv, .rv-d1, .rv-d2, .rv-d3, .rv-d4 {
    opacity: 1 !important;
    transform: none !important;
    visibility: visible !important;
  }

  /* Body + page setup */
  html, body {
    background: white !important;
    color: #111 !important;
    font-size: 11pt;
    line-height: 1.55;
  }
  body { padding: 0 !important; margin: 0 !important; }

  /* Force-expand everything that's collapsed by default */
  .pb-collapse.is-collapsed > .container > *:not(.sec-hd) {
    display: block !important;
  }
  .pb-collapse.is-collapsed > .container > .sec-hd::after { display: none !important; }
  details { display: block !important; }
  details > summary { display: block !important; cursor: default; pointer-events: none; }
  details > summary::after,
  details > summary::-webkit-details-marker { display: none !important; }
  details:not([open]) > *:not(summary) { display: block !important; }
  .govern-pillar > summary,
  .govern-foundation > summary { padding-bottom: 8px; }

  /* Glossary tooltips → keep the text, drop the underline + ⓘ */
  .gloss { border-bottom: none !important; cursor: text !important; color: inherit !important; }
  .gloss::after { display: none !important; }

  /* Sections + page breaks */
  section { page-break-inside: avoid; padding: 18px 0 !important; }
  h1, h2, h3, h4 { page-break-after: avoid; color: #111 !important; }
  h1 { font-size: 22pt; margin-bottom: 8pt; }
  h2 { font-size: 16pt; margin: 16pt 0 6pt; }
  h3 { font-size: 13pt; margin: 12pt 0 4pt; }
  p, li { font-size: 11pt; }
  pre, code {
    background: #f4f4f4 !important;
    color: #111 !important;
    font-size: 9.5pt;
    page-break-inside: avoid;
  }

  /* Force background colours to actually print (e.g. red accents) */
  * { -webkit-print-color-adjust: exact !important; print-color-adjust: exact !important; }

  /* Show URL after external links — comment out if too noisy */
  a[href^="http"]::after,
  a[href^="https"]::after {
    content: " (" attr(href) ")";
    font-size: 8.5pt;
    color: #555;
    word-wrap: break-word;
  }
  /* But suppress URL on internal anchors / mailto */
  a[href^="#"]::after,
  a[href^="mailto:"]::after,
  a[href$=".html"]::after { content: ""; }

  /* Container: full width on print */
  .container, .home-inner, .sub-hero-inner {
    max-width: none !important;
    margin: 0 !important;
    padding: 0 12mm !important;
  }
  .home-hero { min-height: 0 !important; padding: 12mm 12mm 6mm !important; }
  .sub-hero { padding: 12mm 12mm 6mm !important; }
  .sec { padding: 8mm 12mm !important; }

  /* AI Solution Advisor form widgets — hide */
  #bdInput, .bd-chips, .bd-actions, .bd-examples, .bd-input-meta { display: none !important; }

  /* Each chapter starts a new page in the full-playbook print */
  .print-chapter { page-break-before: always; }
  .print-chapter:first-child { page-break-before: avoid; }
}

@page {
  size: A4;
  margin: 14mm 12mm;
}