:root {
  --paper: #f7f6f1;
  --surface: #ffffff;
  --ink: #181d1f;
  --muted: #5d686b;
  --line: #d9ddd6;
  --teal: #007c78;
  --teal-dark: #075b58;
  --amber: #e0a32b;
  --cobalt: #3658c9;
  --leaf: #687f3f;
  --coral: #c95d3d;
  --steel: #496978;
  --shadow: 0 18px 55px rgba(20, 26, 28, 0.12);
  --site-width: 1280px;
  --article-list-width: 1280px;
  --post-width: 820px;
  --page-width: 900px;
  --page-edge: clamp(32px, 6vw, 120px);
  --narrow-page-edge: clamp(32px, 7vw, 150px);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 0 max(24px, calc((100vw - var(--site-width)) / 2));
  background: rgba(247, 246, 241, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  color: #ffffff;
  background: var(--teal-dark);
  border-radius: 8px;
  font-size: 0.78rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 700;
}

.site-nav a:hover {
  color: var(--ink);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  min-height: 620px;
  display: grid;
  align-items: center;
  overflow: hidden;
  isolation: isolate;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  object-fit: cover;
}

.hero-overlay {
  z-index: 1;
  background:
    linear-gradient(90deg, rgba(247, 246, 241, 0.96) 0%, rgba(247, 246, 241, 0.72) 42%, rgba(247, 246, 241, 0.22) 100%),
    linear-gradient(0deg, rgba(24, 29, 31, 0.18), rgba(24, 29, 31, 0));
}

.hero-content {
  position: relative;
  z-index: 2;
  width: min(var(--site-width), calc(100% - var(--page-edge)));
  margin-inline: auto;
  padding: 110px 0 120px;
}

.eyebrow,
.section-label,
.topic {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 0.77rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  max-width: 640px;
  margin: 0;
  font-size: clamp(2.7rem, 7vw, 5.8rem);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 600px;
  margin: 24px 0 0;
  color: #334044;
  font-size: 1.17rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border-radius: 8px;
  font-weight: 800;
}

.button.primary {
  color: #ffffff;
  background: var(--teal-dark);
}

.button.secondary {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.intro-band,
.editorial-proof,
.risk-band,
.launch-plan,
.content-shell,
.article-preview {
  width: min(var(--site-width), calc(100% - var(--page-edge)));
  margin: 0 auto;
}

.intro-band {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 48px;
  padding: 66px 0 42px;
}

.editorial-proof {
  display: grid;
  grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
  gap: 26px;
  align-items: stretch;
  margin-bottom: 56px;
  padding: 30px;
  background:
    linear-gradient(135deg, rgba(0, 124, 120, 0.08), rgba(224, 163, 43, 0.1)),
    #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 38px rgba(20, 26, 28, 0.08);
}

.editorial-proof h2 {
  margin: 0;
  font-size: clamp(1.65rem, 3vw, 2.45rem);
  line-height: 1.1;
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.proof-grid div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(217, 221, 214, 0.85);
  border-radius: 8px;
}

.proof-grid span,
.plan-grid span,
.cluster-card span {
  color: var(--cobalt);
  font-weight: 900;
}

.proof-grid h3 {
  margin: 8px 0;
  font-size: 1rem;
  line-height: 1.25;
}

.proof-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.94rem;
}

.intro-band h2,
.section-heading h2,
.side-panel h2,
.launch-plan h2,
.risk-band h2,
.article-body h2 {
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.55rem);
  line-height: 1.1;
  letter-spacing: 0;
}

.intro-band p:last-child,
.risk-band p {
  margin: 34px 0 0;
  color: var(--muted);
  font-size: 1.03rem;
}

.topic-clusters {
  width: min(var(--site-width), calc(100% - var(--page-edge)));
  margin: 0 auto;
  padding: 16px 0 52px;
}

main > section:not(.hero) {
  width: min(var(--site-width), calc(100% - var(--page-edge)));
  margin-inline: auto;
}

.cluster-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(280px, 0.6fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 20px;
}

.cluster-heading h2 {
  max-width: 620px;
  margin: 0;
  font-size: clamp(1.7rem, 3vw, 2.55rem);
  line-height: 1.1;
}

.cluster-heading > p {
  margin: 0;
  color: var(--muted);
}

.cluster-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.topic-clusters .cluster-grid {
  display: grid;
}

.cluster-card {
  display: grid;
  align-content: space-between;
  min-height: 230px;
  padding: 20px;
  color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  box-shadow: 0 16px 42px rgba(20, 26, 28, 0.13);
}

.topic-clusters .cluster-card {
  display: grid;
  color: #ffffff;
}

.cluster-card::after {
  content: "";
  position: absolute;
  right: -28px;
  bottom: -28px;
  width: 110px;
  height: 110px;
  border: 18px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
}

.cluster-card span {
  position: relative;
  z-index: 1;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.cluster-card h3 {
  position: relative;
  z-index: 1;
  margin: 44px 0 8px;
  font-size: 1.35rem;
  line-height: 1.12;
}

.cluster-card p {
  position: relative;
  z-index: 1;
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

.cluster-basics {
  background: linear-gradient(145deg, #075b58, #0a8a82);
}

.cluster-training {
  background: linear-gradient(145deg, #263f9f, #5174e7);
}

.cluster-tools {
  background: linear-gradient(145deg, #4f692c, #8aa657);
}

.cluster-risks {
  background: linear-gradient(145deg, #a9472f, #df7855);
}

.cluster-human {
  background: linear-gradient(145deg, #355260, #6f8d9d);
}

.content-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 30px;
  align-items: start;
  padding: 28px 0 56px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 20px;
}

.search-box {
  display: grid;
  gap: 8px;
  width: min(320px, 100%);
}

.search-box label {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 800;
}

.search-box input {
  width: 100%;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
  font: inherit;
}

.featured-article,
.article-card,
.side-panel,
.plan-grid > div,
.article-body {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 36px rgba(20, 26, 28, 0.07);
}

.featured-article {
  padding: 30px;
  border-left: 6px solid var(--amber);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--leaf);
  font-size: 0.84rem;
  font-weight: 800;
}

.featured-article h3 {
  margin: 14px 0 10px;
  font-size: clamp(1.45rem, 2vw, 2rem);
  line-height: 1.16;
}

.featured-article p {
  max-width: 760px;
  margin: 0 0 18px;
  color: var(--muted);
}

.featured-article a {
  color: var(--teal-dark);
  font-weight: 800;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 24px 0 18px;
}

.filter-chip {
  min-height: 38px;
  padding: 0 14px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.filter-chip.active {
  color: #ffffff;
  background: var(--teal-dark);
  border-color: var(--teal-dark);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  position: relative;
  overflow: hidden;
  min-height: 236px;
  padding: 22px;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.article-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 5px;
  background: var(--teal);
}

.article-card[data-topic="training"]::before,
.article-card[href*="training"]::before,
.article-card[href*="data-cleaning"]::before,
.article-card[href*="validation-test"]::before,
.article-card[href*="bias"]::before {
  background: var(--cobalt);
}

.article-card[data-topic="tools"]::before,
.article-card[href*="assistants"]::before,
.article-card[href*="image"]::before {
  background: var(--leaf);
}

.article-card[data-topic="risks"]::before,
.article-card[href*="privacy"]::before,
.article-card[href*="hallucinations"]::before,
.article-card[href*="check-ai"]::before {
  background: var(--coral);
}

.article-card[data-topic="work"]::before,
.article-card[data-topic="people"]::before,
.article-card[href*="ai-helps-people"]::before,
.article-card[href*="productivity"]::before,
.article-card[href*="teachers"]::before,
.article-card[href*="small-business"]::before,
.article-card[href*="healthcare"]::before,
.article-card[href*="creativity"]::before,
.article-card[href*="accessibility"]::before,
.article-card[href*="data-analysis"]::before,
.article-card[href*="team-collaboration"]::before,
.article-card[href*="human-skills"]::before,
.article-card[href*="students"]::before,
.article-card[href*="emails"]::before {
  background: var(--steel);
}

.article-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0, 124, 120, 0.42);
  box-shadow: var(--shadow);
}

.article-card:hover h3,
.article-card:focus-visible h3 {
  color: var(--teal-dark);
}

.article-card h3 {
  margin: 0 0 10px;
  font-size: 1.17rem;
  line-height: 1.25;
}

.article-card p:not(.topic) {
  margin: 0 0 18px;
  color: var(--muted);
}

.article-card > span {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: auto;
  color: var(--leaf);
  font-size: 0.84rem;
  font-weight: 800;
}

.article-card > span::after {
  content: "Read guide";
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 10px;
  color: #ffffff;
  background: var(--teal-dark);
  border-radius: 999px;
  font-size: 0.72rem;
  white-space: nowrap;
  transition: transform 160ms ease, background 160ms ease;
}

.article-card:hover > span::after,
.article-card:focus-visible > span::after {
  background: var(--cobalt);
  transform: translateX(2px);
}

.empty-state {
  margin: 18px 0 0;
  padding: 18px;
  color: var(--muted);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.sidebar {
  display: grid;
  gap: 18px;
  position: sticky;
  top: 92px;
}

.side-panel {
  padding: 22px;
}

.side-panel-accent {
  border-left: 5px solid var(--cobalt);
}

.side-panel-human {
  border-left: 5px solid var(--steel);
}

.side-panel h2 {
  font-size: 1.35rem;
}

.reading-list {
  margin: 16px 0 0;
  padding-left: 22px;
  color: var(--muted);
}

.reading-list li + li {
  margin-top: 8px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.tag-list span {
  padding: 7px 10px;
  background: #eef4ef;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #344344;
  font-size: 0.88rem;
  font-weight: 700;
}

.article-preview {
  padding: 24px 0 58px;
}

.article-body {
  max-width: 820px;
  padding: clamp(24px, 5vw, 48px);
}

.article-body .lead {
  color: #303b3e;
  font-size: 1.18rem;
}

.article-body h3 {
  margin: 32px 0 8px;
  font-size: 1.35rem;
}

.article-body p {
  color: var(--muted);
}

.training-pathway {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.75fr);
  gap: 26px;
  width: min(var(--site-width), calc(100% - var(--page-edge)));
  margin: 0 auto 34px;
  padding: 32px;
  background:
    radial-gradient(circle at 0% 0%, rgba(54, 88, 201, 0.42), transparent 34%),
    linear-gradient(135deg, #152021, #243033);
  border-radius: 8px;
  color: #ffffff;
  overflow: hidden;
}

.pathway-copy h2 {
  max-width: 560px;
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.06;
}

.pathway-copy p:last-child {
  margin: 18px 0 0;
  color: #c7d1ce;
}

.training-pathway .section-label {
  color: #9ed7d1;
}

.pathway-image {
  grid-column: 2;
  grid-row: 1 / span 2;
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(0, 0, 0, 0.28);
}

.pathway-steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.pathway-steps a {
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 12px 14px;
  color: #e9efed;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  font-weight: 800;
}

.pathway-steps span {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  color: #101818;
  background: var(--amber);
  border-radius: 8px;
  font-size: 0.72rem;
}

.human-ai-band {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.8fr);
  gap: 26px;
  width: min(var(--site-width), calc(100% - var(--page-edge)));
  margin: 0 auto 34px;
  padding: 32px;
  background:
    radial-gradient(circle at 100% 0%, rgba(201, 93, 61, 0.18), transparent 35%),
    linear-gradient(135deg, rgba(73, 105, 120, 0.15), rgba(224, 163, 43, 0.12)),
    var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}

.human-ai-band h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3vw, 2.8rem);
  line-height: 1.07;
}

.human-ai-band p:last-child {
  max-width: 720px;
  margin: 18px 0 0;
  color: var(--muted);
}

.human-ai-image {
  grid-column: 2;
  grid-row: 1 / span 2;
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  border-radius: 8px;
  box-shadow: 0 18px 48px rgba(20, 26, 28, 0.16);
}

.human-ai-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: center;
}

.human-ai-links a {
  min-height: 62px;
  display: grid;
  align-items: center;
  padding: 12px 14px;
  color: #223033;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
}

.article-list-page {
  width: min(var(--article-list-width), calc(100% - var(--page-edge)));
  margin: 0 auto;
  padding: 58px 0 76px;
}

.article-library-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 0.72fr);
  gap: 30px;
  align-items: stretch;
  margin-bottom: 24px;
  padding: clamp(28px, 4vw, 42px);
  background:
    linear-gradient(90deg, rgba(247, 246, 241, 0.94), rgba(247, 246, 241, 0.62)),
    #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.article-list-header {
  display: grid;
  align-content: center;
}

.article-list-header h1 {
  max-width: 560px;
  margin: 0;
  font-size: clamp(2.4rem, 4.2vw, 4.7rem);
  line-height: 1;
}

.article-list-header p:last-child {
  max-width: 620px;
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 1.05rem;
}

.article-library-hero img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  max-height: 390px;
  object-fit: cover;
  border-radius: 8px;
}

.article-topic-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0 0 22px;
}

.article-topic-strip a {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 14px;
  color: #ffffff;
  background: var(--teal-dark);
  border-radius: 8px;
  font-weight: 800;
}

.article-topic-strip a:nth-child(2) {
  background: var(--cobalt);
}

.article-topic-strip a:nth-child(3) {
  background: var(--steel);
}

.article-topic-strip a:nth-child(4) {
  background: var(--leaf);
}

.article-topic-strip a:nth-child(5) {
  background: var(--coral);
}

.article-list-page .article-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.article-list-page .article-card {
  min-height: 220px;
}

.article-list-page .article-card:nth-child(6n + 1) {
  background: #ffffff;
}

.article-list-page .article-card:nth-child(6n + 2) {
  background: #f3f8f6;
}

.article-list-page .article-card:nth-child(6n + 3) {
  background: #f6f7ff;
}

.article-list-page .article-card:nth-child(6n + 4) {
  background: #fff7ed;
}

.article-list-page .article-card:nth-child(6n + 5) {
  background: #f4f7ef;
}

.article-list-page .article-card:nth-child(6n) {
  background: #fff3ef;
}

.post-shell {
  width: min(var(--post-width), calc(100% - var(--narrow-page-edge)));
  margin: 0 auto;
  padding: 56px 0 76px;
}

.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.86rem;
  font-weight: 700;
}

.breadcrumbs a {
  color: var(--teal-dark);
}

.breadcrumbs a:hover {
  color: var(--ink);
}

.post-card {
  padding: clamp(26px, 5vw, 52px);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 36px rgba(20, 26, 28, 0.07);
}

.post-card h1 {
  margin: 0;
  font-size: clamp(2.2rem, 5vw, 4.4rem);
  line-height: 1;
}

.post-card h2 {
  margin: 34px 0 10px;
  font-size: 1.5rem;
  line-height: 1.18;
}

.post-card p,
.post-card li {
  color: var(--muted);
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0 24px;
  color: var(--leaf);
  font-size: 0.84rem;
  font-weight: 800;
}

.post-lead {
  color: #303b3e;
  font-size: 1.17rem;
}

.post-card ul,
.post-card ol {
  padding-left: 22px;
}

.post-card li + li {
  margin-top: 8px;
}

.post-note {
  margin: 28px 0;
  padding: 16px 18px;
  color: #334344;
  background: #eef4ef;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.reader-value,
.plain-example,
.action-step {
  margin: 34px 0;
}

.reader-value {
  padding: 24px;
  background:
    linear-gradient(135deg, rgba(0, 124, 120, 0.08), rgba(54, 88, 201, 0.08)),
    #f9fbf8;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.reader-value h2,
.plain-example h2,
.action-step h2 {
  margin-top: 0;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.value-grid > div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(217, 221, 214, 0.9);
  border-radius: 8px;
}

.value-grid h3 {
  margin: 0 0 10px;
  font-size: 1rem;
}

.plain-example,
.action-step {
  padding: 22px 24px;
  border-left: 5px solid var(--amber);
  background: #fffaf0;
  border-radius: 8px;
}

.action-step {
  border-left-color: var(--teal);
  background: #f1f8f6;
}

.inline-cta,
.text-link {
  color: var(--teal-dark);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.post-nav {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  font-weight: 800;
}

.post-nav a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 16px;
  color: var(--teal-dark);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(20, 26, 28, 0.06);
}

.post-nav a:last-child {
  color: #ffffff;
  background: var(--teal-dark);
  border-color: var(--teal-dark);
}

.post-nav a:hover {
  transform: translateY(-1px);
  box-shadow: 0 12px 30px rgba(20, 26, 28, 0.12);
}

.related-guides {
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.related-heading {
  margin-bottom: 16px;
}

.related-heading h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2rem);
}

.related-heading p:last-child {
  max-width: 620px;
  margin: 10px 0 0;
  color: var(--muted);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.related-card {
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  min-height: 210px;
  padding: 18px;
  background: #f3f8f6;
  border: 1px solid var(--line);
  border-radius: 8px;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease;
}

.related-card:nth-child(2) {
  background: #f6f7ff;
}

.related-card:nth-child(3) {
  background: #fff7ed;
}

.related-card:hover,
.related-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(0, 124, 120, 0.38);
  box-shadow: var(--shadow);
}

.related-topic {
  color: var(--teal-dark);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.related-card h3 {
  margin: 12px 0 8px;
  font-size: 1.05rem;
  line-height: 1.22;
}

.related-card p {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.related-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  justify-self: start;
  min-height: 32px;
  padding: 0 12px;
  color: #ffffff;
  background: var(--teal-dark);
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 800;
}

.launch-plan {
  padding: 58px 0;
  border-top: 1px solid var(--line);
}

.plan-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 26px;
}

.plan-grid > div {
  padding: 24px;
}

.plan-grid span {
  color: var(--cobalt);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.plan-grid h3 {
  margin: 10px 0 8px;
  line-height: 1.2;
}

.plan-grid p {
  margin: 0;
  color: var(--muted);
}

.risk-band {
  padding: 52px 0 72px;
}

.risk-band p {
  max-width: 760px;
}

.page-shell {
  width: min(var(--page-width), calc(100% - var(--narrow-page-edge)));
  min-height: 58vh;
  margin: 0 auto;
  padding: 74px 0;
}

.page-card {
  padding: clamp(26px, 5vw, 52px);
}

.page-card h1 {
  max-width: 760px;
  font-size: clamp(2.2rem, 5vw, 4.2rem);
  line-height: 1;
}

.page-card h2 {
  margin: 32px 0 8px;
  font-size: 1.35rem;
  line-height: 1.2;
}

.page-card p,
.contact-list {
  color: var(--muted);
}

.contact-list {
  margin: 20px 0;
  padding-left: 22px;
}

.note {
  padding: 14px 16px;
  background: #eef4ef;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
  padding: 42px max(24px, calc((100vw - var(--site-width)) / 2));
  color: #d8ddda;
  background: #1b2424;
}

.site-footer p {
  max-width: 480px;
  color: #b6c0bd;
}

.site-footer nav {
  display: grid;
  gap: 10px;
  min-width: 170px;
}

.site-footer a:hover {
  color: #ffffff;
}

.footer-brand .brand-mark {
  background: var(--amber);
  color: #1b2424;
}

.hidden {
  display: none;
}

@media (max-width: 900px) {
  :root {
    --site-width: 100%;
    --article-list-width: 100%;
    --page-edge: 48px;
    --narrow-page-edge: 42px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: absolute;
    inset: 72px 0 auto;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px 6vw 18px;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
  }

  .site-nav.open {
    display: flex;
  }

  .site-nav a {
    padding: 13px 0;
  }

  .static-nav {
    position: static;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 0;
    border-bottom: 0;
  }

  .hero {
    min-height: 560px;
  }

  .hero-overlay {
    background: linear-gradient(90deg, rgba(247, 246, 241, 0.96) 0%, rgba(247, 246, 241, 0.78) 100%);
  }

  .intro-band,
  .editorial-proof,
  .content-shell,
  .section-heading,
  .article-library-hero,
  .cluster-heading,
  .training-pathway,
  .human-ai-band,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .intro-band,
  .editorial-proof,
  .section-heading,
  .site-footer {
    gap: 20px;
  }

  .proof-grid {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .cluster-grid,
  .human-ai-links,
  .pathway-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pathway-image,
  .human-ai-image {
    grid-column: auto;
    grid-row: auto;
    min-height: 260px;
  }

  .article-list-page .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .plan-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  :root {
    --page-edge: 28px;
    --narrow-page-edge: 24px;
  }

  .site-header {
    min-height: 66px;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 12px;
    padding: 14px 20px;
  }

  .brand {
    min-width: 0;
  }

  .static-nav {
    width: 100%;
    justify-content: flex-start;
    gap: 10px 18px;
    font-size: 0.9rem;
  }

  .static-nav a {
    padding: 0;
  }

  .hero {
    min-height: 520px;
  }

  .hero-content {
    width: min(520px, 88vw);
    margin-inline: auto;
    padding: 78px 0 88px;
  }

  .hero-copy {
    font-size: 1.02rem;
  }

  .button {
    width: 100%;
  }

  .article-grid {
    grid-template-columns: 1fr;
  }

  .editorial-proof {
    padding: 24px;
  }

  .value-grid {
    grid-template-columns: 1fr;
  }

  .article-list-page .article-grid {
    grid-template-columns: 1fr;
  }

  .article-card > span {
    align-items: flex-start;
    flex-direction: column;
  }

  .article-list-page {
    margin: 0;
    max-width: 100%;
    overflow: hidden;
    width: 100%;
    padding: 32px 16px 56px;
  }

  main.article-list-page > section {
    max-width: 100%;
    width: 100%;
    margin-inline: 0;
  }

  .article-library-hero {
    display: block;
    overflow: hidden;
    padding: 22px;
  }

  .article-list-header {
    min-width: 0;
    width: 100%;
  }

  .article-list-header > * {
    max-width: 100%;
  }

  .article-list-header h1 {
    max-width: 100%;
    font-size: clamp(1.95rem, 9vw, 2.35rem);
    line-height: 1.06;
    overflow-wrap: anywhere;
  }

  .article-list-header p:last-child {
    max-width: 100%;
    font-size: 1rem;
    overflow-wrap: anywhere;
  }

  .article-library-hero img {
    aspect-ratio: 4 / 3;
    width: 100%;
    min-width: 0;
    height: auto;
    min-height: 0;
    max-height: none;
    margin-top: 24px;
    object-position: center;
  }

  .article-topic-strip {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    max-width: 100%;
    width: 100%;
  }

  .article-topic-strip a {
    justify-content: center;
    min-width: 0;
    width: 100%;
    padding: 0 10px;
    font-size: 0.92rem;
    text-align: center;
  }

  .cluster-grid,
  .human-ai-links,
  .pathway-steps {
    grid-template-columns: 1fr;
  }

  .training-pathway,
  .human-ai-band {
    padding: 24px;
  }

  .featured-article {
    padding: 22px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .related-card {
    min-height: 0;
  }

  .post-nav {
    flex-direction: column;
  }

  .post-nav a {
    width: 100%;
  }

}