:root {
  /* Audient cool overrides — same as live source */
  --text:   #0b0b0c;
  --muted:  #5a5f69;
  --bg:     #FDFBF7;     /* foundation cream — never pure white */
  --card:   #F8F5EE;     /* foundation warm cream — panel surface */
  --shot-side: #F2EDE2;  /* warm sidebar inside the screenshot */
  --shot-chip: #EFE9DC;  /* warm chip background (timestamp, src-tag, cite) */
  --border: rgba(0, 0, 0, 0.08);
  --hairline: rgba(0, 0, 0, 0.06);

  /* App Store accent — used sparingly */
  --link: #0a66c2;       /* sober, App-Store-adjacent blue for in-text links */

  /* Brand brick stays — used for the bar-stack mark and one small accent rule */
  --brick: #8B3A2A;

  /* Aurora — three-stop palette for the hero .shot-wash. ONE STOP PER BLOB,
     not a gradient ramp. Aurora only; never as solid fills, text, or accents.
     Pending design-system patch in async-digital-site (separate ticket). */
  --aurora-stop-1: #E89B7E; /* coral peach */
  --aurora-stop-2: #A77398; /* dusty plum */
  --aurora-stop-3: #5E97A8; /* muted teal */
  --aurora-base:      #1D1916; /* warm near-black pool behind the window */
  --aurora-base-edge: #2A2520; /* slightly lifted edge */
  --aurora-intensity: 1;
  --aurora-speed:     1;
  --aurora-blur:    40px;

  /* Wider wrap than 960 — Audient marketing surface gets a bit more room
     to breathe so the screenshot can sit large */
  --wrap-wide: 1120px;
}
@media (prefers-color-scheme: dark) {:root{
    /* Match the page so the mask edge dissolves into the bg rather than
       revealing a near-black-on-near-black boundary. */
    --aurora-base:      #0E0B08;
    --aurora-base-edge: #0E0B08;
    --aurora-stop-1: #F4A98B;
    --aurora-stop-2: #B881A6;
    --aurora-stop-3: #6DAABC;
  }}
*, *::before, *::after { box-sizing: border-box; }
html, body {
  background: var(--bg);
  color: var(--text);
  overflow-x: clip;
}
body {
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; }
.wrap-wide {
  width: 100%;
  max-width: var(--wrap-wide);
  margin: 0 auto;
  padding: 0 24px;
}
.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  -webkit-backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--hairline);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}
.nav-mark {
  width: 22px;
  height: 22px;
  display: block;
}
.nav-mark svg { width: 100%; height: 100%; }
.nav-brand-name {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  font-size: 14px;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur-1) var(--ease-out);
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  font-size: 13px;
  font-weight: 500;
  padding: 7px 12px;
  border: 1px solid var(--border);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text);
  background: var(--bg);
  white-space: nowrap;
  transition: border-color var(--dur-1) var(--ease-out),
              background var(--dur-1) var(--ease-out);
}
.nav-cta:hover {
  border-color: rgba(0, 0, 0, 0.18);
  background: #fafbfc;
}
@media (max-width: 900px) {.nav-links{ gap: 16px; }.nav-links li.nav-hide-sm{ display: none; }}
@media (max-width: 520px) {.nav-links{ gap: 12px; }.nav-links li.nav-hide-xs{ display: none; }.lang-switch{ margin-left: 8px; }}
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  transition: border-color var(--dur-1) var(--ease-out),
              background var(--dur-1) var(--ease-out);
}
.btn-ghost:hover {
  border-color: rgba(0, 0, 0, 0.2);
  background: #fafbfc;
}
.btn-ghost .arrow {
  transition: transform var(--dur-1) var(--ease-out);
}
.btn-ghost:hover .arrow { transform: translateX(2px); }
@supports not (mix-blend-mode: plus-lighter) {
  .shot-wash__blob { mix-blend-mode: screen; }
}
@keyframes aurora-drift-1 {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  25%  { transform: translate3d(4%, 3%, 0) scale(1.06); }
  50%  { transform: translate3d(7%, -2%, 0) scale(1.02); }
  75%  { transform: translate3d(2%, -4%, 0) scale(1.08); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes aurora-drift-2 {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  20%  { transform: translate3d(-3%, 4%, 0) scale(1.05); }
  55%  { transform: translate3d(-6%, 2%, 0) scale(0.96); }
  80%  { transform: translate3d(-2%, -3%, 0) scale(1.08); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes aurora-drift-3 {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  30%  { transform: translate3d(5%, -3%, 0) scale(1.05); }
  60%  { transform: translate3d(-2%, -5%, 0) scale(1.08); }
  85%  { transform: translate3d(3%, 2%, 0) scale(0.98); }
  100% { transform: translate3d(0, 0, 0) scale(1); }
}
@keyframes caret { to { visibility: hidden; } }
.section {
  padding: 110px 0 0;
}
.section-eyebrow {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brick);
  margin-bottom: 14px;
}
.section h2 {
  font-size: clamp(28px, 3.6vw, 40px);
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  margin: 0 0 14px;
  max-width: 24ch;
}
.section-sub {
  font-size: 17px;
  line-height: 1.55;
  color: var(--muted);
  margin: 0;
  max-width: 60ch;
}
.footer {
  background: var(--bg);
  border-top: 1px solid var(--hairline);
  padding: 56px 0 36px;
}
.footer-bar {
  height: 4px;
  background: var(--brick);
  width: 100%;
  margin-bottom: 56px;
  /* full-bleed */
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.footer-brand-block { display: flex; flex-direction: column; gap: 14px; }
.footer-mark {
  width: 28px; height: 28px;
}
.footer-blurb {
  font-size: 13.5px;
  color: var(--muted);
  line-height: 1.55;
  max-width: 28ch;
  margin: 0;
}
.footer-col h4 {
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #8a8e96;
  margin: 0 0 12px;
}
.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col a {
  font-size: 14px;
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: border-color var(--dur-1) var(--ease-out);
}
.footer-col a:hover { border-bottom-color: rgba(0, 0, 0, 0.18); }
.footer-meta {
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  font-size: 13px;
  line-height: 1.55;
  color: var(--muted);
}
.footer-meta a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1px;
}
.footer-meta a:hover { border-bottom-color: rgba(0, 0, 0, 0.18); }
.footer-meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
}
.footer-meta-row + .footer-meta-row { margin-top: 8px; }
.footer-sep { color: rgba(0,0,0,0.2); }
@media (max-width: 800px) {.footer-grid{
    grid-template-columns: 1fr 1fr;
    gap: 28px 24px;
  }.footer-brand-block{ grid-column: 1 / -1; }}
@media (max-width: 480px) {.footer{ padding: 44px 0 32px; }.footer-bar{ margin-bottom: 40px; }.footer-grid{ grid-template-columns: 1fr; gap: 24px; margin-bottom: 32px; }.footer-meta-row{ gap: 4px 10px; }}
.section-divider {
  margin: 0;
  height: 1px;
  background: transparent;
  border: 0;
}
@media (prefers-reduced-motion: reduce) {*{ animation-duration: 0.01ms !important; transition: none !important; }}
.wrap {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 48px 24px;
}
.h1 {
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--text);
}
.section.prose {
  padding: 44px 0 0;
}
.section.prose h2 {
  max-width: none;
  font-size: clamp(24px, 2.8vw, 32px);
  margin-bottom: 16px;
}
/* ---- Mastering the AI Coworker: book-specific layout ----
   Redesigned 2026-08-27 from the claude.ai/design pass recorded in the
   vault at content/coworker-site-design/. Header and footer chrome is
   unchanged (locked to the audient-site pattern); everything between
   them is the new body shape: a hairline-divided contents list instead
   of cards, a rule-and-prose problem split, and an unboxed pull-quote
   for the sample principle, fitted to a six-part non-fiction book
   rather than carried over from an app-feature grid. */

.nav-mark { display:block; width:28px; height:28px; }

.hero { padding: 64px 0 72px; }
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 288px;
  gap: var(--space-2xl);
  align-items: start;
}
.hero-copy h1 { margin: 8px 0 0; }
.hero-copy .intro { margin-top: var(--space-lg); max-width: 34em; }
.hero-actions { margin-top: var(--space-lg); }
.hero-note { margin-top: var(--space-md); font-size: var(--size-small); color: var(--muted); max-width: 34em; }
.hero-cover { justify-self: end; width: 288px; }
.hero-cover img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  box-shadow: 0 18px 40px rgba(31, 28, 24, 0.18);
}

.section { padding: 72px 0; }
.section-alt { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section h2 { margin: 0 0 var(--space-md); }
.section .h2-sub { margin-top: var(--space-2xl); }
.section p { max-width: 62ch; }
.section-dek { color: var(--muted); margin-top: -4px; }

/* Problem: prose left, a bordered rule-list of the book's fixes right */
.problem-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: var(--space-2xl);
  margin-top: var(--space-xl);
}
.problem-prose { display: flex; flex-direction: column; gap: var(--space-md); }
.problem-prose p:last-child { color: var(--muted); }
.problem-rule { border-left: 2px solid var(--primary); padding-left: var(--space-lg); }
.problem-rule p { padding: 14px 0; }
.problem-rule p + p { border-top: 1px solid var(--border); }

/* Contents: hairline rows, not cards (numeral / title / description) */
.parts { list-style: none; padding: 0; margin: var(--space-xl) 0 0; border-bottom: 1px solid var(--border); }
.parts > li {
  border-top: 1px solid var(--border);
  padding: var(--space-lg) 0;
  display: grid;
  grid-template-columns: 64px minmax(0, 15em) minmax(0, 1fr);
  gap: var(--space-lg);
  align-items: baseline;
}
.part-num {
  font-size: 13px;
  font-weight: var(--weight-medium);
  letter-spacing: 0.06em;
  color: var(--primary);
  text-transform: none;
}
.parts h3 { margin: 0; }
.parts p { margin: 0; max-width: 68ch; color: var(--muted); }

/* Sample: an unboxed pull-quote, then a rule-and-prose block beneath */
.pull {
  margin: var(--space-lg) 0 0;
  padding: 0;
  border: 0;
  background: none;
  border-radius: 0;
}
.pull p { margin: 0; font-size: 28px; line-height: 1.3; font-weight: var(--weight-medium); letter-spacing: -0.01em; color: var(--accent); max-width: 30ch; }
.sample-body { display: grid; grid-template-columns: 56px minmax(0, 1fr); gap: var(--space-lg); margin-top: var(--space-xl); max-width: 48em; }
.sample-rule { border-top: 2px solid var(--primary); margin-top: 11px; }
.sample-body > div:last-child { display: flex; flex-direction: column; gap: var(--space-md); }
.sample-body p:last-child { color: var(--muted); }

/* Closing band: text left, button right, not centered */
.cta-band .wrap { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: var(--space-2xl); align-items: center; }
.cta-band h2 { margin: 0; }
.cta-band p { margin: var(--space-md) 0 0; max-width: 56ch; }
.cta-band .btn-primary { white-space: nowrap; }

@media (max-width: 860px) {
  .hero { padding-top: 40px; padding-bottom: 56px; }
  .hero-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .hero-cover { justify-self: start; width: 216px; }
  .problem-grid { grid-template-columns: 1fr; gap: var(--space-xl); }
  .problem-rule { border-left: 0; border-top: 2px solid var(--primary); padding-left: 0; padding-top: var(--space-sm); }
  .parts > li { grid-template-columns: 40px minmax(0, 1fr); }
  .parts > li > p { grid-column: 2; }
  .sample-rule { display: none; }
  .sample-body { grid-template-columns: 1fr; }
  .cta-band .wrap { grid-template-columns: 1fr; gap: var(--space-lg); }
  .cta-band a { justify-self: start; }
}

/* ---- element-level headings + primary button ----
   audient.css styles headings via a .h1 class; this page uses semantic
   elements, so the same scale is bound to the elements here. */

h1 {
  font-size: clamp(34px, 4.4vw, 52px);
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0;
  color: var(--text);
}
.section h2 { font-size: clamp(26px, 3vw, 34px); }
.parts h3 { font-size: clamp(19px, 2vw, 22px); line-height: 1.2; letter-spacing: -0.01em; }

.eyebrow {
  font-size: var(--size-small);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  font-weight: var(--weight-medium);
  color: var(--primary);
  margin: 0;
}

.intro { font-size: var(--size-intro); line-height: var(--lh-relaxed); color: var(--text); }

.btn-primary {
  display: inline-block;
  font-size: 15px;
  font-weight: var(--weight-medium);
  padding: 12px 22px;
  border: 1px solid var(--primary);
  border-radius: 8px;
  text-decoration: none;
  color: var(--on-primary);
  background: var(--primary);
  white-space: nowrap;
  transition: background var(--dur-1) var(--ease-out), border-color var(--dur-1) var(--ease-out);
}
.btn-primary:hover { background: #7A3224; border-color: #7A3224; color: var(--on-primary); }