:root {
  color-scheme: light;
  --ink: #142024;
  --muted: #5c686a;
  --paper: #f7f5ef;
  --surface: #ffffff;
  --line: #d8d4c9;
  --teal: #0e6f73;
  --teal-deep: #08464a;
  --amber: #c46d2b;
  --green: #6f8a4a;
  --slate: #24343a;
  --shadow: 0 24px 70px rgba(20, 32, 36, 0.12);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

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

section[id] {
  scroll-margin-top: 4.25rem;
}

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

button,
input {
  font: inherit;
}

.skip-link {
  position: fixed;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-150%);
  background: var(--surface);
  border: 1px solid var(--ink);
  padding: 0.65rem 0.85rem;
}

.skip-link:focus {
  transform: translateY(0);
}

.visually-hidden {
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  height: 1px;
  overflow: hidden;
  position: absolute;
  white-space: nowrap;
  width: 1px;
}

.site-header {
  align-items: center;
  background: rgba(247, 245, 239, 0.9);
  border-bottom: 1px solid rgba(216, 212, 201, 0.8);
  display: flex;
  justify-content: space-between;
  left: 0;
  padding: 0.9rem clamp(1rem, 4vw, 3rem);
  position: fixed;
  right: 0;
  top: 0;
  transition: background 180ms ease, box-shadow 180ms ease;
  z-index: 10;
}

.site-header.is-scrolled {
  background: rgba(247, 245, 239, 0.98);
  box-shadow: 0 8px 30px rgba(20, 32, 36, 0.08);
}

.brand {
  align-items: center;
  display: inline-flex;
  font-size: 0.98rem;
  font-weight: 800;
  gap: 0.65rem;
}

.brand-mark {
  background:
    linear-gradient(90deg, var(--teal) 0 35%, transparent 35% 45%, var(--amber) 45% 70%, transparent 70% 80%, var(--green) 80%),
    var(--slate);
  border-radius: 0.25rem;
  display: inline-block;
  height: 1.45rem;
  width: 1.45rem;
}

.site-nav {
  align-items: center;
  display: flex;
  gap: clamp(0.85rem, 2.4vw, 1.6rem);
}

.site-nav a {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--teal-deep);
}

.nav-toggle {
  align-items: center;
  background: transparent;
  border: 0;
  display: none;
  height: 2.4rem;
  justify-content: center;
  padding: 0;
  width: 2.4rem;
}

.nav-toggle-line {
  background: var(--ink);
  display: block;
  height: 2px;
  position: absolute;
  transition: transform 180ms ease, opacity 180ms ease;
  width: 1.35rem;
}

.nav-toggle-line:nth-child(1) {
  transform: translateY(-0.42rem);
}

.nav-toggle-line:nth-child(3) {
  transform: translateY(0.42rem);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: rotate(-45deg);
}

.hero {
  align-items: center;
  display: flex;
  min-height: 68vh;
  overflow: hidden;
  padding: 5.5rem clamp(1.25rem, 6vw, 5rem) 2.75rem;
  position: relative;
}

.hero-image,
.hero-shade {
  inset: 0;
  position: absolute;
}

.hero-image {
  height: 100%;
  object-fit: cover;
  object-position: center;
  width: 100%;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(8, 17, 19, 0.92) 0%, rgba(8, 17, 19, 0.74) 36%, rgba(8, 17, 19, 0.2) 72%),
    linear-gradient(0deg, rgba(8, 17, 19, 0.38), rgba(8, 17, 19, 0.08));
}

.hero-content {
  color: #ffffff;
  max-width: 860px;
  position: relative;
  z-index: 1;
}

.eyebrow {
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  margin: 0 0 0.8rem;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #ffb46e;
}

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

h1,
h2,
h3 {
  line-height: 1.05;
  margin: 0;
}

h1 {
  font-size: clamp(3rem, 5.4vw, 4.85rem);
  max-width: 16ch;
}

h2 {
  font-size: clamp(2rem, 3.35vw, 3.5rem);
  max-width: 16ch;
}

h3 {
  font-size: 1.28rem;
}

.hero-copy {
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  margin: 1.4rem 0 0;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 2rem;
}

.button {
  align-items: center;
  border: 1px solid transparent;
  border-radius: 0.45rem;
  cursor: pointer;
  display: inline-flex;
  font-weight: 800;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.78rem 1rem;
  transition: background 160ms ease, border-color 160ms ease, color 160ms ease, transform 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--amber);
  color: #1d1510;
}

.button-primary:hover,
.button-primary:focus-visible {
  background: #e08a43;
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.45);
  color: #ffffff;
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.12);
}

.signal-strip {
  background: var(--slate);
  color: #ffffff;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.signal {
  border-right: 1px solid rgba(255, 255, 255, 0.14);
  min-height: 9rem;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.signal:last-child {
  border-right: 0;
}

.signal-kicker {
  color: #ffbc7c;
  display: block;
  font-size: 0.72rem;
  font-weight: 800;
  margin-bottom: 0.45rem;
  text-transform: uppercase;
}

.signal strong {
  display: block;
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.signal span:last-child {
  color: rgba(255, 255, 255, 0.72);
}

.section,
.stack-section,
.glossary,
.adoption-section,
.subscribe-section {
  margin: 0 auto;
  max-width: var(--max);
  padding: clamp(4rem, 8vw, 7rem) clamp(1.25rem, 4vw, 2rem);
}

.section-heading {
  align-items: end;
  display: grid;
  gap: 1.25rem;
  grid-template-columns: minmax(0, 0.9fr) minmax(16rem, 0.65fr);
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
}

.section-heading .eyebrow {
  grid-column: 1 / -1;
  margin-bottom: -0.6rem;
}

.section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1.04rem;
  margin: 0;
}

.section-heading-wide {
  grid-template-columns: 1fr;
}

.section-heading-wide h2 {
  max-width: 24ch;
}

.source-link {
  color: var(--teal-deep);
  font-weight: 900;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

.topic-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-bottom: 1.25rem;
}

.topic-button {
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 800;
  padding: 0.64rem 0.9rem;
}

.topic-button:hover,
.topic-button:focus-visible,
.topic-button.is-active {
  background: var(--teal-deep);
  border-color: var(--teal-deep);
  color: #ffffff;
}

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

.article-card {
  background: var(--surface);
  border: 1px solid rgba(216, 212, 201, 0.85);
  border-radius: 0.5rem;
  box-shadow: 0 12px 30px rgba(20, 32, 36, 0.06);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 17rem;
  padding: 1.35rem;
}

.article-card.is-hidden {
  display: none;
}

.feature-card {
  background: var(--teal-deep);
  color: #ffffff;
  grid-column: span 2;
}

.card-topic {
  color: var(--amber);
  font-size: 0.76rem;
  font-weight: 900;
  margin: 0 0 0.8rem;
  text-transform: uppercase;
}

.feature-card .card-topic {
  color: #ffbc7c;
}

.article-card p:not(.card-topic) {
  color: var(--muted);
  margin: 0.85rem 0 1.4rem;
}

.feature-card p:not(.card-topic) {
  color: rgba(255, 255, 255, 0.76);
}

.article-card a {
  color: var(--teal);
  font-weight: 900;
}

.feature-card a {
  color: #ffbc7c;
}

.status-label {
  align-self: flex-start;
  border-top: 1px solid rgba(20, 32, 36, 0.14);
  color: var(--teal);
  font-size: 0.88rem;
  font-weight: 900;
  padding-top: 0.75rem;
}

.feature-card .status-label {
  border-top-color: rgba(255, 255, 255, 0.2);
  color: #ffbc7c;
}

.curation-note {
  border-top: 1px solid var(--line);
  margin-top: 1.25rem;
  padding-top: 1rem;
}

.curation-note p {
  color: var(--muted);
  font-weight: 800;
  margin: 0;
  max-width: 820px;
}

.stack-section {
  max-width: none;
  padding-left: max(clamp(1.25rem, 4vw, 2rem), calc((100vw - var(--max)) / 2 + 2rem));
  padding-right: max(clamp(1.25rem, 4vw, 2rem), calc((100vw - var(--max)) / 2 + 2rem));
  background: #e7ebe1;
}

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

.stack-item {
  background: rgba(255, 255, 255, 0.68);
  min-height: 18rem;
  padding: 1.5rem;
}

.stack-item span,
.notes-list span {
  color: var(--amber);
  display: block;
  font-size: 0.8rem;
  font-weight: 900;
  margin-bottom: 2.2rem;
}

.stack-item h3 {
  margin-bottom: 0.9rem;
}

.stack-item p {
  color: var(--muted);
  margin: 0;
}

.history-section {
  background:
    linear-gradient(180deg, rgba(247, 245, 239, 0) 0%, rgba(255, 255, 255, 0.42) 100%);
}

.timeline-grid {
  display: grid;
  gap: 0.75rem;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.essay-preview {
  align-items: center;
  background: var(--teal-deep);
  color: #ffffff;
  display: grid;
  gap: 1.5rem;
  grid-template-columns: minmax(0, 1fr) auto;
  margin-bottom: 1rem;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.essay-preview .eyebrow {
  color: #ffbc7c;
}

.essay-preview h3 {
  font-size: clamp(1.6rem, 3vw, 2.6rem);
  margin-bottom: 0.8rem;
}

.essay-preview p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.76);
  margin: 0;
  max-width: 760px;
}

.timeline-card {
  background: var(--surface);
  border-top: 4px solid var(--amber);
  box-shadow: 0 12px 30px rgba(20, 32, 36, 0.06);
  min-height: 16.5rem;
  padding: 1rem;
}

.timeline-card span,
.dc-types span,
.adoption-grid span {
  color: var(--teal);
  display: block;
  font-size: 0.78rem;
  font-weight: 900;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.timeline-card h3,
.dc-types h3,
.adoption-grid h3 {
  margin-bottom: 0.7rem;
}

.timeline-card p,
.dc-types p,
.adoption-grid p,
.evidence-panel li,
.trap-grid p {
  color: var(--muted);
  font-size: 0.95rem;
  margin: 0;
}

.trap-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 1rem;
}

.trap-grid article {
  border: 1px solid var(--line);
  padding: 1.25rem;
}

.trap-grid span {
  color: var(--amber);
  display: block;
  font-size: 0.76rem;
  font-weight: 900;
  margin-bottom: 0.85rem;
  text-transform: uppercase;
}

.trap-grid h3 {
  margin-bottom: 0.85rem;
}

.data-center-section {
  max-width: none;
  padding-left: max(clamp(1.25rem, 4vw, 2rem), calc((100vw - var(--max)) / 2 + 2rem));
  padding-right: max(clamp(1.25rem, 4vw, 2rem), calc((100vw - var(--max)) / 2 + 2rem));
  background: #f3efe5;
}

.dc-layout {
  align-items: stretch;
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(0, 1.35fr) minmax(18rem, 0.65fr);
}

.dc-types {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.dc-types article {
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(216, 212, 201, 0.8);
  min-height: 13rem;
  padding: 1.25rem;
}

.evidence-panel {
  background: var(--teal-deep);
  color: #ffffff;
  padding: 1.45rem;
}

.evidence-panel .eyebrow {
  color: #ffbc7c;
}

.evidence-panel h3 {
  margin-bottom: 1rem;
}

.evidence-panel ul {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding-left: 1.15rem;
}

.evidence-panel li {
  color: rgba(255, 255, 255, 0.76);
}

.evidence-panel li strong {
  color: #ffffff;
}

.evidence-note {
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: #ffbc7c;
  font-size: 0.95rem;
  font-weight: 800;
  margin: 1.1rem 0 0;
  padding-top: 1rem;
}

.tier-panel {
  background: rgba(255, 255, 255, 0.62);
  border: 1px solid rgba(216, 212, 201, 0.85);
  display: grid;
  gap: 1rem;
  grid-template-columns: minmax(16rem, 0.55fr) minmax(0, 1.45fr);
  margin-top: 1rem;
  padding: 1.25rem;
}

.tier-intro h3 {
  font-size: clamp(1.35rem, 2vw, 1.9rem);
  margin-bottom: 0.85rem;
}

.tier-intro p:not(.eyebrow) {
  color: var(--muted);
  margin: 0;
}

.tier-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.tier-grid article {
  background: var(--surface);
  min-height: 12rem;
  padding: 1rem;
}

.tier-grid span {
  color: var(--amber);
  display: block;
  font-size: 0.76rem;
  font-weight: 900;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
}

.tier-grid h4 {
  font-size: 1rem;
  line-height: 1.2;
  margin: 0 0 0.65rem;
}

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

.adoption-section {
  background: var(--slate);
  color: #ffffff;
  max-width: none;
  padding-left: max(clamp(1.25rem, 4vw, 2rem), calc((100vw - var(--max)) / 2 + 2rem));
  padding-right: max(clamp(1.25rem, 4vw, 2rem), calc((100vw - var(--max)) / 2 + 2rem));
}

.adoption-section .section-heading p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.72);
}

.adoption-grid {
  display: grid;
  gap: 1px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.adoption-grid article {
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  min-height: 17rem;
  padding: 1.35rem;
}

.adoption-grid span {
  color: #ffbc7c;
}

.adoption-grid p {
  color: rgba(255, 255, 255, 0.72);
}

.decision-actions {
  display: grid;
  gap: 0.55rem;
  list-style: none;
  margin: auto 0 0;
  padding: 1.2rem 0 0;
}

.decision-actions li {
  border-top: 1px solid rgba(255, 255, 255, 0.18);
  color: #ffffff;
  font-size: 0.92rem;
  font-weight: 900;
  padding-top: 0.55rem;
}

.two-column {
  align-items: start;
  display: grid;
  gap: clamp(2rem, 6vw, 5rem);
  grid-template-columns: minmax(15rem, 0.75fr) minmax(0, 1.25fr);
}

.two-column .section-heading {
  display: block;
  margin: 0;
}

.two-column .section-heading h2 {
  max-width: 10ch;
}

.notes-list {
  display: grid;
  gap: 0.85rem;
}

.notes-list article {
  border-top: 1px solid var(--line);
  display: grid;
  gap: 1rem;
  grid-template-columns: 3rem 1fr;
  padding: 1.1rem 0;
}

.notes-list span {
  margin: 0;
}

.notes-list p {
  font-size: clamp(1.1rem, 2vw, 1.55rem);
  line-height: 1.25;
  margin: 0;
}

.glossary-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin: 0;
}

.glossary-grid div {
  background: var(--surface);
  border-left: 4px solid var(--green);
  padding: 1.25rem;
}

.glossary-grid dt {
  font-weight: 900;
  margin-bottom: 0.7rem;
}

.glossary-grid dd {
  color: var(--muted);
  margin: 0;
}

.subscribe-section {
  align-items: center;
  background: var(--slate);
  color: #ffffff;
  display: grid;
  gap: 2rem;
  grid-template-columns: minmax(0, 1fr) minmax(20rem, 0.8fr);
  margin-bottom: 4rem;
}

.subscribe-copy h2 {
  max-width: 12ch;
}

.subscribe-copy p:not(.eyebrow) {
  color: rgba(255, 255, 255, 0.75);
  font-size: 1.05rem;
  margin: 1rem 0 0;
  max-width: 560px;
}

.subscribe-form {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 0.5rem;
  padding: 1rem;
}

.subscribe-form label {
  display: block;
  font-weight: 800;
  margin-bottom: 0.6rem;
}

.form-row {
  display: flex;
  gap: 0.65rem;
}

.form-row input {
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 0.45rem;
  flex: 1 1 12rem;
  min-width: 0;
  padding: 0.84rem 0.9rem;
}

.form-message {
  color: #ffbc7c;
  font-weight: 800;
  margin: 0.8rem 0 0;
  min-height: 1.5rem;
}

.signup-note {
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.86rem;
  line-height: 1.45;
  margin: 0.45rem 0 0;
}

.subscribe-frame {
  border: 0;
  height: 0;
  position: absolute;
  width: 0;
}

.contact-line {
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.95rem;
  margin: 0.85rem 0 0;
}

.contact-line a {
  color: #ffbc7c;
  font-weight: 900;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

.site-footer {
  align-items: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  max-width: var(--max);
  padding: 1.5rem clamp(1.25rem, 4vw, 2rem) 2rem;
}

.site-footer p {
  margin: 0;
}

.site-footer a {
  color: var(--teal);
  font-weight: 900;
}

.essay-page {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  grid-template-columns: minmax(0, 1fr);
  margin: 0 auto;
  max-width: 980px;
  padding: 6.5rem clamp(1.25rem, 4vw, 2rem) 4rem;
}

.essay-article {
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: clamp(1.35rem, 3.5vw, 2.65rem);
}

.essay-header {
  border-bottom: 1px solid var(--line);
  margin-bottom: 0;
  padding-bottom: clamp(1rem, 2.4vw, 1.65rem);
}

.essay-meta-row {
  align-items: center;
  display: flex;
  gap: 1rem;
  justify-content: space-between;
  margin-bottom: 0.9rem;
}

.essay-meta-row .eyebrow {
  margin: 0;
}

.essay-byline {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  margin: 0;
  text-align: right;
  text-transform: uppercase;
}

.essay-header h1 {
  color: var(--ink);
  font-size: clamp(1.75rem, 2.65vw, 2.35rem);
  line-height: 1.16;
  max-width: 26ch;
}

.essay-header p:not(.eyebrow):not(.essay-byline) {
  color: var(--muted);
  font-size: clamp(0.98rem, 1.4vw, 1.1rem);
  margin: 0.75rem 0 0;
  max-width: 720px;
}

.essay-body {
  color: #24343a;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.08rem, 2vw, 1.22rem);
  line-height: 1.72;
}

.essay-body p {
  margin: 0 0 1.35rem;
}

.essay-core {
  background: #f3efe5;
  border-left: 4px solid var(--amber);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 1.02rem;
  line-height: 1.62;
  padding: 1rem 1.1rem;
}

.essay-body h2 {
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: clamp(1.35rem, 2.15vw, 1.85rem);
  line-height: 1.18;
  margin: 2.35rem 0 0.8rem;
  max-width: none;
}

.citation {
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.72em;
  font-weight: 900;
  line-height: 0;
}

.citation a {
  color: var(--teal);
  text-decoration: none;
}

.citation a:hover,
.citation a:focus-visible {
  text-decoration: underline;
}

.dossier-article {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}

.dossier-section {
  display: grid;
  gap: 1.25rem;
}

.dossier-section .section-heading {
  display: block;
  margin-bottom: 0;
}

.dossier-section .section-heading .eyebrow {
  margin-bottom: 0.35rem;
}

.dossier-section .section-heading h2 {
  font-size: clamp(1.65rem, 3vw, 2.45rem);
  max-width: 15ch;
}

.dossier-lede {
  color: #24343a;
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(1.15rem, 2vw, 1.38rem);
  line-height: 1.65;
  margin: 0;
}

.finding-grid,
.case-grid,
.pattern-grid {
  display: grid;
  gap: 1rem;
}

.finding-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.finding-grid article,
.pattern-grid article,
.case-file {
  border: 1px solid var(--line);
  padding: 1.25rem;
}

.finding-grid span,
.case-file > span {
  color: var(--amber);
  display: block;
  font-size: 0.76rem;
  font-weight: 900;
  margin-bottom: 0.8rem;
  text-transform: uppercase;
}

.finding-grid h2,
.case-file h2 {
  font-size: clamp(1.25rem, 2vw, 1.7rem);
  margin-bottom: 0.75rem;
}

.finding-grid p,
.case-file p,
.pattern-grid p,
.analysis-panel p,
.cycle-list li {
  color: var(--muted);
  margin: 0;
}

.cycle-list {
  background: #f3efe5;
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.cycle-list li {
  align-items: start;
  border-bottom: 1px solid rgba(216, 212, 201, 0.9);
  display: grid;
  gap: 1rem;
  grid-template-columns: 3rem 1fr;
  padding: 1rem 1.2rem;
}

.cycle-list li:last-child {
  border-bottom: 0;
}

.cycle-number {
  color: var(--teal);
  font-size: 0.78rem;
  font-weight: 900;
  line-height: 1.3;
  padding-top: 0.1rem;
}

.cycle-list h3 {
  font-size: 1.05rem;
  line-height: 1.2;
  margin: 0 0 0.25rem;
}

.cycle-list p {
  color: var(--muted);
  margin: 0;
}

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

.case-file {
  background: rgba(255, 255, 255, 0.72);
  display: grid;
  gap: 0.85rem;
}

.ai-parallel {
  background: #e7ebe1;
  border-left: 4px solid var(--green);
  padding: 0.85rem;
}

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

.pattern-grid h3 {
  margin-bottom: 0.75rem;
}

.analysis-panel {
  background: var(--teal-deep);
  color: #ffffff;
  display: grid;
  gap: 1rem;
  padding: clamp(1.25rem, 4vw, 2rem);
}

.analysis-panel p {
  color: rgba(255, 255, 255, 0.78);
  font-size: 1.04rem;
}

.source-shelf {
  border-top: 1px solid var(--line);
  padding-top: 1.35rem;
}

.source-shelf .section-heading {
  display: block;
  margin-bottom: 0.75rem;
}

.source-shelf .section-heading .eyebrow {
  margin-bottom: 0.35rem;
}

.source-shelf .section-heading h2 {
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  max-width: 18ch;
}

.source-shelf .section-heading p:not(.eyebrow) {
  color: var(--muted);
  font-size: 0.98rem;
  margin: 0.3rem 0 0;
  max-width: 640px;
}

.reference-list {
  background: var(--surface);
  border: 1px solid var(--line);
  counter-reset: refs;
  display: grid;
  gap: 0;
  list-style: none;
  margin: 0;
  padding: 0;
}

.reference-list li {
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  display: block;
  padding: 0.85rem 1rem 0.85rem 3.1rem;
  position: relative;
}

.reference-list li:last-child {
  border-bottom: 0;
}

.reference-list li::before {
  color: var(--amber);
  content: counter(refs);
  counter-increment: refs;
  font-weight: 900;
  left: 1rem;
  position: absolute;
  top: 0.85rem;
  width: 1.45rem;
}

.reference-list a {
  color: var(--teal-deep);
  font-weight: 800;
  text-decoration: underline;
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

.source-grid {
  display: grid;
  gap: 0.8rem;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.source-grid a {
  background: var(--surface);
  border-left: 4px solid var(--green);
  color: var(--ink);
  display: block;
  font-weight: 800;
  padding: 1rem;
}

.source-grid span {
  color: var(--amber);
  display: block;
  font-size: 0.74rem;
  font-weight: 900;
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

@media (max-width: 920px) {
  .signal-strip,
  .section-heading,
  .article-grid,
  .stack-grid,
  .timeline-grid,
  .trap-grid,
  .essay-preview,
  .finding-grid,
  .case-grid,
  .pattern-grid,
  .dc-layout,
  .tier-panel,
  .tier-grid,
  .adoption-grid,
  .two-column,
  .glossary-grid,
  .subscribe-section,
  .source-grid {
    grid-template-columns: 1fr;
  }

  .essay-meta-row {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.45rem;
  }

  .essay-byline {
    text-align: left;
  }

  .essay-preview {
    align-items: start;
  }

  .feature-card {
    grid-column: span 1;
  }

  .stack-grid {
    gap: 0.8rem;
  }

  .stack-item,
  .timeline-card,
  .adoption-grid article {
    min-height: auto;
  }

  .dc-types {
    grid-template-columns: 1fr;
  }

  .signal {
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    border-right: 0;
  }
}

@media (max-width: 720px) {
  .site-header {
    align-items: flex-start;
  }

  .nav-toggle {
    display: inline-flex;
    position: relative;
  }

  .site-nav {
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    border-top: 1px solid var(--line);
    display: none;
    flex-direction: column;
    gap: 0;
    left: 0;
    padding: 0.75rem 1.25rem;
    position: absolute;
    right: 0;
    top: 100%;
  }

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

  .site-nav a {
    padding: 0.85rem 0;
    width: 100%;
  }

  .hero {
    min-height: 76vh;
    padding-top: 6rem;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(8, 17, 19, 0.92), rgba(8, 17, 19, 0.46)),
      linear-gradient(0deg, rgba(8, 17, 19, 0.5), rgba(8, 17, 19, 0.08));
  }

  h1 {
    font-size: clamp(2.7rem, 16vw, 4.8rem);
  }

  .form-row,
  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 0.8rem;
  }
}

@media (max-width: 460px) {
  .article-card {
    min-height: auto;
  }

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

  .stack-item span,
  .notes-list span {
    margin-bottom: 0.8rem;
  }
}