:root {
  --ink: #111827;
  --muted: #5c667a;
  --paper: #f5f2ea;
  --paper-deep: #ebe5d8;
  --navy: #0d1424;
  --navy-soft: #151f34;
  --line: #cbc5b9;
  --acid: #c8f169;
  --coral: #ff735f;
  --blue: #8dc7ff;
  --white: #fffdf8;
  --max: 1180px;
  --display: "Arial Narrow", "Roboto Condensed", "Helvetica Neue", sans-serif;
  --body: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--navy);
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--body);
  line-height: 1.65;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--coral);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 12px;
  left: 12px;
  padding: 10px 14px;
  color: var(--white);
  background: var(--navy);
  transform: translateY(-160%);
}

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

.page-shell {
  min-height: 100vh;
  overflow: hidden;
}

.site-header {
  width: min(calc(100% - 40px), var(--max));
  min-height: 78px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: var(--navy);
  background: var(--acid);
  border: 1px solid var(--navy);
  font-family: var(--display);
  font-size: 0.82rem;
  letter-spacing: -0.06em;
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 25px;
}

.site-header nav a {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
  text-decoration: none;
}

.site-header nav a:hover,
.site-header nav a[aria-current="page"] {
  color: var(--ink);
}

.site-header nav .nav-cta {
  padding: 9px 15px;
  color: var(--white);
  background: var(--navy);
  border: 1px solid var(--navy);
}

.site-header nav .nav-cta:hover {
  color: var(--navy);
  background: var(--acid);
}

main {
  width: min(calc(100% - 40px), var(--max));
  margin: 0 auto;
}

.hero {
  min-height: 690px;
  padding: 82px 0 64px;
  display: grid;
  grid-template-columns: minmax(0, 1.62fr) minmax(280px, 0.72fr);
  align-items: center;
  gap: 72px;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: 56px;
  right: -70px;
  width: 340px;
  height: 340px;
  border: 1px solid var(--line);
  box-shadow: 34px 34px 0 var(--paper-deep);
  transform: rotate(7deg);
}

.eyebrow {
  display: inline-block;
  color: #384154;
  font-size: 0.72rem;
  font-weight: 850;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1,
.page-heading h1,
.article-header h1,
.not-found h1 {
  max-width: 900px;
  margin: 20px 0 24px;
  font-family: var(--display);
  font-size: clamp(3.7rem, 8.1vw, 7.1rem);
  font-stretch: condensed;
  font-weight: 900;
  letter-spacing: -0.075em;
  line-height: 0.89;
  text-wrap: balance;
}

.hero-copy > p {
  max-width: 740px;
  margin: 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.35rem);
  line-height: 1.55;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 12px 18px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--navy);
  font-size: 0.82rem;
  font-weight: 850;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.button.primary {
  color: var(--white);
  background: var(--navy);
}

.button.primary:hover {
  color: var(--navy);
  background: var(--acid);
}

.button.secondary {
  background: transparent;
}

.button.secondary:hover {
  background: var(--white);
}

.button.inverse {
  color: var(--navy);
  background: var(--acid);
  border-color: var(--acid);
}

.button.inverse:hover {
  background: var(--white);
  border-color: var(--white);
}

.signal-panel {
  position: relative;
  padding: 28px;
  color: var(--white);
  background: var(--navy);
  border: 1px solid var(--navy);
  box-shadow: 16px 16px 0 var(--coral);
}

.signal-label {
  display: block;
  padding-bottom: 18px;
  color: var(--acid);
  border-bottom: 1px solid #2e3a53;
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.signal-panel > div {
  min-height: 88px;
  display: grid;
  grid-template-columns: 72px 1fr;
  align-items: center;
  border-bottom: 1px solid #2e3a53;
}

.signal-panel > div:last-child {
  border: 0;
}

.signal-panel strong {
  color: var(--acid);
  font-family: var(--display);
  font-size: 2.15rem;
  letter-spacing: -0.05em;
}

.signal-panel span {
  color: #b8c1d2;
  font-size: 0.86rem;
}

.editorial-intro {
  padding: 86px 0 30px;
  display: grid;
  grid-template-columns: 60px 1.4fr 0.8fr;
  align-items: end;
  gap: 28px;
  border-top: 1px solid var(--line);
}

.section-index {
  color: #8e887e;
  font-family: ui-monospace, "SFMono-Regular", Consolas, monospace;
  font-size: 0.72rem;
}

h2,
h3,
p {
  text-wrap: pretty;
}

.editorial-intro h2,
.feature-band h2,
.conversion-band h2,
.article-cta h2 {
  max-width: 800px;
  margin: 10px 0 0;
  font-family: var(--display);
  font-size: clamp(2.4rem, 5vw, 4.7rem);
  font-weight: 900;
  letter-spacing: -0.06em;
  line-height: 0.96;
}

.editorial-intro > p {
  margin: 0;
  color: var(--muted);
}

.guide-grid {
  padding: 28px 0 96px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.guide-card {
  min-height: 330px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 160ms ease, transform 160ms ease;
}

.guide-card:hover {
  background: var(--white);
  transform: translateY(-3px);
}

.guide-card h3,
.project-card h3 {
  margin: 32px 0 14px;
  font-family: var(--display);
  font-size: 1.78rem;
  letter-spacing: -0.045em;
  line-height: 1.05;
}

.guide-card h3 a,
.project-card h3 a {
  text-decoration: none;
}

.guide-card p,
.project-card p {
  margin: 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.guide-card .text-link {
  margin-top: auto;
  padding-top: 28px;
}

.text-link {
  width: fit-content;
  font-size: 0.78rem;
  font-weight: 850;
  text-decoration: none;
}

.text-link:hover {
  text-decoration: underline;
}

.feature-band,
.conversion-band {
  margin: 0 calc((100vw - min(calc(100vw - 40px), var(--max))) / -2);
  padding: 86px max(20px, calc((100vw - var(--max)) / 2));
  color: var(--white);
  background: var(--navy);
}

.feature-band {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  gap: 90px;
}

.feature-band .eyebrow,
.conversion-band .eyebrow,
.article-cta .eyebrow {
  color: var(--acid);
}

.feature-band p,
.conversion-band p,
.article-cta p {
  max-width: 700px;
  color: #b8c1d2;
}

.feature-band .button {
  margin-top: 18px;
}

.data-ledger {
  border: 1px solid #3a465e;
  background: var(--navy-soft);
}

.data-ledger span,
.data-ledger b {
  padding: 20px 22px;
  display: block;
  border-bottom: 1px solid #3a465e;
}

.data-ledger span::before {
  content: "●";
  margin-right: 10px;
  color: var(--coral);
}

.data-ledger b {
  color: var(--acid);
  border: 0;
  font-family: var(--display);
  font-size: 1.4rem;
}

.project-grid {
  padding: 28px 0 94px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.project-card {
  min-height: 240px;
  padding: 28px;
  display: grid;
  align-content: space-between;
  border: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.32);
}

.project-card:hover {
  border-color: var(--ink);
  background: var(--white);
}

.project-card h3 {
  margin-top: 18px;
}

.card-links {
  padding-top: 28px;
  display: flex;
  gap: 20px;
}

.card-links a {
  font-size: 0.75rem;
  font-weight: 850;
}

.conversion-band {
  margin-top: 24px;
  margin-bottom: 0;
  border-top: 6px solid var(--coral);
}

.text-link.light {
  color: var(--white);
}

.page-heading {
  max-width: 1000px;
  padding: 100px 0 72px;
}

.page-heading h1,
.article-header h1,
.not-found h1 {
  font-size: clamp(3.5rem, 7.6vw, 6.6rem);
}

.page-heading > p {
  max-width: 740px;
  color: var(--muted);
  font-size: 1.18rem;
}

.catalog {
  padding-bottom: 80px;
}

.catalog-group {
  padding-top: 42px;
  border-top: 1px solid var(--line);
}

.catalog-group > h2 {
  font-family: var(--display);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-transform: uppercase;
}

.catalog-group .project-grid {
  padding-bottom: 54px;
}

.article-header {
  max-width: 980px;
  padding: 70px 0 66px;
}

.back-link {
  display: block;
  width: fit-content;
  margin-bottom: 58px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 800;
  text-decoration: none;
}

.article-header .dek {
  max-width: 760px;
  color: var(--muted);
  font-size: 1.25rem;
}

.byline {
  margin-top: 36px;
  padding-top: 18px;
  display: flex;
  gap: 24px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.76rem;
  font-weight: 750;
}

.article-layout {
  padding: 66px 0 100px;
  display: grid;
  grid-template-columns: 240px minmax(0, 760px);
  justify-content: space-between;
  gap: 70px;
  border-top: 1px solid var(--line);
}

.article-note {
  height: fit-content;
  padding: 20px;
  position: sticky;
  top: 24px;
  border-left: 4px solid var(--coral);
  background: var(--paper-deep);
}

.article-note strong {
  font-size: 0.76rem;
  text-transform: uppercase;
}

.article-note p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.84rem;
}

.article-body > section {
  padding: 0 0 64px;
}

.article-body h2 {
  margin: 8px 0 20px;
  font-family: var(--display);
  font-size: clamp(2rem, 4vw, 3.35rem);
  letter-spacing: -0.05em;
  line-height: 1;
}

.article-body p,
.article-body li {
  color: #354055;
  font-size: 1.03rem;
}

.article-body a {
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

pre {
  max-width: 100%;
  margin: 28px 0;
  padding: 24px;
  overflow-x: auto;
  color: #dce8f8;
  background: var(--navy);
  border-left: 5px solid var(--acid);
  font-size: 0.86rem;
  line-height: 1.65;
}

.check-grid {
  margin: 28px 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.check-grid article {
  padding: 22px;
  display: grid;
  gap: 8px;
  background: var(--white);
}

.check-grid span {
  color: var(--muted);
  font-size: 0.88rem;
}

.steps {
  margin: 26px 0;
  padding: 0;
  counter-reset: method;
  list-style: none;
}

.steps li {
  padding: 16px 0 16px 48px;
  position: relative;
  border-bottom: 1px solid var(--line);
}

.steps li::before {
  counter-increment: method;
  content: counter(method, decimal-leading-zero);
  position: absolute;
  left: 0;
  color: var(--coral);
  font-family: ui-monospace, monospace;
  font-size: 0.76rem;
  font-weight: 800;
}

.metric-strip {
  margin: 28px 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
}

.metric-strip span {
  padding: 20px 14px;
  display: grid;
  border-right: 1px solid var(--line);
}

.metric-strip span:last-child {
  border-right: 0;
}

.metric-strip small {
  color: var(--muted);
}

.article-body .article-cta {
  margin-top: 30px;
  padding: 48px;
  color: var(--white);
  background: var(--navy);
  border-top: 6px solid var(--coral);
}

.article-cta .button {
  margin-top: 14px;
}

.about-grid {
  padding-bottom: 92px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.about-grid article {
  min-height: 300px;
  padding: 34px;
  background: var(--white);
}

.about-grid h2 {
  margin: 34px 0 14px;
  font-family: var(--display);
  font-size: 2rem;
  letter-spacing: -0.045em;
}

.about-grid p {
  color: var(--muted);
}

.not-found {
  min-height: 680px;
  padding: 100px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.not-found > p {
  color: var(--muted);
  font-size: 1.15rem;
}

.site-footer {
  width: 100%;
  padding: 62px max(20px, calc((100vw - var(--max)) / 2)) 34px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 44px;
  color: #b8c1d2;
  background: var(--navy);
  border-top: 1px solid #2e3a53;
}

.site-footer .brand {
  color: var(--white);
}

.site-footer p {
  font-size: 0.84rem;
}

.footer-links {
  display: flex;
  gap: 22px;
}

.footer-links a {
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 800;
}

.site-footer .disclosure {
  max-width: 920px;
  margin: 16px 0 0;
  grid-column: 1 / -1;
  padding-top: 24px;
  border-top: 1px solid #2e3a53;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .hero::before {
    display: none;
  }

  .signal-panel {
    max-width: 520px;
  }

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

  .editorial-intro {
    grid-template-columns: 42px 1fr;
  }

  .editorial-intro > p,
  .editorial-intro > .text-link {
    grid-column: 2;
  }

  .feature-band {
    grid-template-columns: 1fr;
    gap: 48px;
  }

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

  .article-note {
    position: static;
  }

  .metric-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .metric-strip span:nth-child(2) {
    border-right: 0;
  }

  .metric-strip span:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 680px) {
  .site-header {
    width: min(calc(100% - 28px), var(--max));
    padding: 16px 0;
    align-items: flex-start;
  }

  .site-header .brand span:last-child {
    display: none;
  }

  .site-header nav {
    gap: 13px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }

  .site-header nav a {
    font-size: 0.75rem;
  }

  .site-header nav .nav-cta {
    display: none;
  }

  main {
    width: min(calc(100% - 28px), var(--max));
  }

  .hero {
    min-height: auto;
    padding: 64px 0;
  }

  .hero h1,
  .page-heading h1,
  .article-header h1,
  .not-found h1 {
    font-size: clamp(3.1rem, 16vw, 4.8rem);
  }

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

  .hero-actions .button {
    width: 100%;
  }

  .signal-panel {
    box-shadow: 9px 9px 0 var(--coral);
  }

  .editorial-intro {
    padding-top: 68px;
    grid-template-columns: 1fr;
  }

  .editorial-intro > p,
  .editorial-intro > .text-link {
    grid-column: auto;
  }

  .guide-grid,
  .project-grid,
  .about-grid {
    grid-template-columns: 1fr;
  }

  .guide-card {
    min-height: 290px;
  }

  .feature-band,
  .conversion-band {
    margin-left: -14px;
    margin-right: -14px;
    padding: 68px 20px;
  }

  .page-heading,
  .article-header {
    padding: 68px 0 54px;
  }

  .back-link {
    margin-bottom: 42px;
  }

  .article-layout {
    padding-top: 48px;
    gap: 45px;
  }

  .check-grid,
  .metric-strip {
    grid-template-columns: 1fr;
  }

  .metric-strip span,
  .metric-strip span:nth-child(2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .metric-strip span:last-child {
    border-bottom: 0;
  }

  .article-body .article-cta {
    padding: 34px 26px;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }

  .footer-links {
    flex-wrap: wrap;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .guide-card {
    transition: none;
  }
}