:root {
  --ink: #0a0a0a;
  --muted: #686868;
  --line: #d8d8d8;
  --paper: #ffffff;
  --soft: #f5f5f3;
  --lime: #adff00;
  --lime-dark: #477900;
  --content: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Helvetica Neue", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

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

.resource-header {
  position: sticky;
  z-index: 20;
  top: 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.12);
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px) saturate(160%);
}

.resource-header-inner {
  width: min(calc(100% - 40px), var(--content));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  text-decoration: none;
  font-size: 22px;
  font-weight: 500;
  letter-spacing: 0;
}

.brand span {
  color: var(--lime-dark);
}

.resource-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
}

.resource-nav a {
  text-decoration: none;
}

.resource-nav .nav-cta,
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 0 22px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  background: var(--ink);
  color: #fff;
  font-weight: 650;
  text-decoration: none;
}

.button-light {
  background: #fff;
  color: var(--ink);
}

.breadcrumb {
  width: min(calc(100% - 40px), var(--content));
  margin: 28px auto 0;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: #aaa;
}

.breadcrumb a {
  text-decoration: none;
}

.hub-hero,
.article-hero {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  padding: 84px 0 64px;
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--lime-dark);
  font-size: 14px;
  font-weight: 750;
  text-transform: uppercase;
}

.hub-hero h1,
.article-hero h1 {
  max-width: 1020px;
  margin: 0;
  font-size: clamp(54px, 8vw, 112px);
  font-weight: 580;
  line-height: 0.94;
  letter-spacing: 0;
}

.hub-hero p,
.article-lead {
  max-width: 780px;
  margin: 38px 0 0;
  color: var(--muted);
  font-size: clamp(21px, 2.2vw, 30px);
  line-height: 1.25;
}

.hub-visual,
.article-cover {
  position: relative;
  overflow: hidden;
  width: min(calc(100% - 40px), 1440px);
  margin: 0 auto;
  background: var(--soft);
}

.hub-visual {
  height: min(68vw, 760px);
}

.article-cover {
  aspect-ratio: 16 / 8;
}

.article-cover figcaption {
  position: absolute;
  right: 20px;
  bottom: 20px;
  max-width: 420px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  color: #202020;
  font-size: 14px;
}

.hub-visual img,
.article-cover img {
  height: 100%;
  object-fit: cover;
}

.hub-visual img {
  object-position: center 46%;
}

.hub-visual-label {
  position: absolute;
  right: 24px;
  bottom: 24px;
  max-width: 360px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(16px);
  font-size: 15px;
}

.resource-section {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  padding: 110px 0;
}

.diagnostic-teaser-band {
  padding: 84px 20px;
  background: var(--ink);
  color: #fff;
}

.diagnostic-teaser-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 64px;
  align-items: end;
  width: min(100%, var(--content));
  margin: 0 auto;
  color: inherit;
  text-decoration: none;
}

.diagnostic-teaser-copy small,
.diagnostic-teaser-copy span {
  color: var(--lime);
  font-size: 13px;
  font-weight: 750;
  text-transform: uppercase;
}

.diagnostic-teaser-copy h2 {
  max-width: 900px;
  margin: 18px 0 16px;
  color: #fff;
  font-size: clamp(46px, 7vw, 94px);
  font-weight: 570;
  line-height: 0.96;
}

.diagnostic-teaser-copy p {
  max-width: 670px;
  margin: 0;
  color: #bdbdbd;
  font-size: 19px;
}

.diagnostic-teaser-score {
  display: grid;
  width: 190px;
  aspect-ratio: 1;
  place-content: center;
  border: 1px solid #fff;
  border-radius: 50%;
  background: var(--lime);
  color: var(--ink);
  text-align: center;
  transition: transform 220ms ease;
}

.diagnostic-teaser-inner:hover .diagnostic-teaser-score {
  transform: rotate(4deg) scale(1.03);
}

.diagnostic-teaser-score strong,
.diagnostic-teaser-score span {
  display: block;
}

.diagnostic-teaser-score strong {
  font-size: 58px;
  font-weight: 570;
  line-height: 1;
}

.diagnostic-teaser-score span {
  margin-top: 6px;
  font-size: 12px;
  font-weight: 750;
  text-transform: uppercase;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 42px;
}

.section-heading h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(38px, 5vw, 72px);
  font-weight: 580;
  line-height: 1;
}

.section-heading p {
  max-width: 360px;
  margin: 0;
  color: var(--muted);
}

.resource-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 18px;
}

.resource-card {
  position: relative;
  overflow: hidden;
  min-height: 620px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  text-decoration: none;
}

.resource-card:nth-child(3) {
  grid-column: 1 / -1;
  min-height: 520px;
}

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

.commercial-grid .resource-card,
.commercial-grid .resource-card:nth-child(3) {
  grid-column: auto;
  min-height: 560px;
}

.commercial-grid .resource-card-copy h2 {
  font-size: clamp(26px, 2.8vw, 44px);
}

.resource-card img {
  height: 100%;
  object-fit: cover;
  transition: transform 500ms ease;
}

.resource-card:hover img {
  transform: scale(1.018);
}

.resource-card-copy {
  position: absolute;
  right: 18px;
  bottom: 18px;
  left: 18px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(18px);
}

.resource-card-copy small {
  color: var(--lime-dark);
  font-weight: 750;
  text-transform: uppercase;
}

.resource-card-copy h2 {
  max-width: 790px;
  margin: 10px 0 6px;
  font-size: clamp(28px, 3vw, 50px);
  font-weight: 580;
  line-height: 1.02;
}

.resource-card-copy p {
  max-width: 700px;
  margin: 0;
  color: var(--muted);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin-top: 30px;
  color: var(--muted);
  font-size: 15px;
}

.signal-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(calc(100% - 40px), 1100px);
  margin: 34px auto 0;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
}

.signal-strip > div {
  display: grid;
  gap: 4px;
  min-height: 130px;
  align-content: center;
  padding: 22px 30px;
  border-right: 1px solid var(--line);
}

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

.signal-strip strong {
  font-size: clamp(32px, 4vw, 58px);
  font-weight: 580;
  line-height: 1;
}

.signal-strip span {
  color: var(--muted);
  font-size: 14px;
  text-transform: uppercase;
}

.article-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 760px);
  gap: 80px;
  width: min(calc(100% - 40px), 1100px);
  margin: 0 auto;
  padding: 90px 0 120px;
}

.article-toc {
  position: sticky;
  top: 104px;
  align-self: start;
  padding-top: 8px;
  border-top: 2px solid var(--ink);
  font-size: 14px;
}

.article-toc strong {
  display: block;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.article-toc a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  text-decoration: none;
}

.article-body h2 {
  margin: 76px 0 22px;
  font-size: clamp(34px, 4vw, 54px);
  font-weight: 590;
  line-height: 1.02;
}

.article-body h2:first-child {
  margin-top: 0;
}

.article-body h3 {
  margin: 42px 0 14px;
  font-size: 26px;
  line-height: 1.1;
}

.article-body p,
.article-body li {
  color: #292929;
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 10px;
}

.article-body a:not(.button) {
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.system-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: 12px;
  align-items: center;
  margin: 32px 0 44px;
}

.system-flow span {
  min-height: 92px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--soft);
  font-weight: 650;
  text-align: center;
}

.system-flow i {
  color: var(--lime-dark);
  font-style: normal;
  font-size: 24px;
}

.answer-box {
  margin: 34px 0;
  padding: 28px;
  border-left: 5px solid var(--lime);
  background: var(--soft);
}

.answer-box strong {
  display: block;
  margin-bottom: 8px;
}

.price-table {
  margin: 36px 0;
  border-top: 1px solid var(--ink);
}

.price-row {
  display: grid;
  grid-template-columns: 1.15fr 0.75fr 1.5fr;
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.price-row strong {
  font-size: 19px;
}

.price-row span {
  color: var(--muted);
}

.article-cta {
  margin-top: 76px;
  padding: 46px;
  border-radius: 6px;
  background: var(--ink);
  color: #fff;
}

.article-cta small {
  color: var(--lime);
  font-weight: 750;
  text-transform: uppercase;
}

.article-cta h2 {
  margin: 14px 0 18px;
  color: #fff;
}

.article-cta p {
  color: #c8c8c8;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  margin-top: 28px;
}

.text-action {
  color: #fff;
  font-weight: 650;
  text-underline-offset: 5px;
}

.article-faq {
  border-top: 1px solid var(--ink);
}

.article-faq details {
  border-bottom: 1px solid var(--line);
}

.article-faq summary {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 24px 0;
  font-size: 20px;
  font-weight: 650;
  cursor: pointer;
  list-style: none;
}

.article-faq summary::-webkit-details-marker {
  display: none;
}

.article-faq summary span {
  color: var(--lime-dark);
  font-size: 13px;
}

.article-faq summary i {
  font-style: normal;
  font-size: 26px;
  font-weight: 400;
}

.article-faq details[open] summary i {
  transform: rotate(45deg);
}

.article-faq details p {
  max-width: 650px;
  margin: -4px 0 26px 60px;
  color: var(--muted);
}

.related {
  padding: 100px 0;
  background: var(--soft);
}

.related-inner {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.related h2 {
  margin: 0 0 34px;
  font-size: clamp(38px, 5vw, 68px);
  line-height: 1;
}

.related-links {
  border-top: 1px solid var(--ink);
}

.related-links a {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 20px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  text-decoration: none;
}

.related-links span:first-child {
  color: var(--lime-dark);
  font-size: 14px;
  font-weight: 750;
}

.resource-footer {
  padding: 64px 0 36px;
  background: var(--ink);
  color: #fff;
}

.resource-footer-inner {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.resource-footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  padding-bottom: 62px;
}

.resource-footer h2 {
  max-width: 650px;
  margin: 0;
  font-size: clamp(42px, 6vw, 80px);
  font-weight: 570;
  line-height: 0.98;
}

.resource-footer nav {
  display: grid;
  align-content: start;
  gap: 10px;
  min-width: 230px;
}

.resource-footer nav a,
.resource-footer nav button {
  padding: 0;
  border: 0;
  background: none;
  color: #d3d3d3;
  font: inherit;
  text-align: left;
  text-decoration: none;
  cursor: pointer;
}

.resource-footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding-top: 22px;
  border-top: 1px solid #333;
  color: #999;
  font-size: 14px;
}

@media (max-width: 820px) {
  body {
    font-size: 17px;
  }

  .resource-header-inner {
    width: min(calc(100% - 28px), var(--content));
    min-height: 64px;
  }

  .resource-nav > a:not(.nav-cta) {
    display: none;
  }

  .resource-nav .nav-cta {
    min-height: 42px;
    padding: 0 16px;
    font-size: 14px;
  }

  .breadcrumb,
  .hub-hero,
  .article-hero,
  .resource-section,
  .article-layout,
  .related-inner,
  .resource-footer-inner {
    width: min(calc(100% - 28px), var(--content));
  }

  .hub-hero,
  .article-hero {
    padding: 56px 0 44px;
  }

  .hub-hero h1,
  .article-hero h1 {
    font-size: clamp(48px, 15vw, 74px);
  }

  .hub-visual,
  .article-cover {
    width: 100%;
    aspect-ratio: 4 / 5;
    height: auto;
  }

  .article-cover img {
    object-position: 58% center;
  }

  .article-cover figcaption {
    right: 14px;
    bottom: 14px;
    left: 14px;
    max-width: none;
  }

  .hub-visual-label {
    right: 14px;
    bottom: 14px;
    left: 14px;
    max-width: none;
  }

  .resource-section {
    padding: 76px 0;
  }

  .diagnostic-teaser-band {
    padding: 70px 14px;
  }

  .diagnostic-teaser-inner {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .diagnostic-teaser-score {
    width: 152px;
  }

  .diagnostic-teaser-score strong {
    font-size: 48px;
  }

  .section-heading,
  .resource-footer-top {
    align-items: start;
    flex-direction: column;
  }

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

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

  .resource-card,
  .resource-card:nth-child(3) {
    grid-column: auto;
    min-height: 520px;
  }

  .resource-card-copy {
    right: 12px;
    bottom: 12px;
    left: 12px;
    padding: 18px;
  }

  .article-layout {
    display: block;
    padding: 58px 0 86px;
  }

  .signal-strip {
    grid-template-columns: 1fr;
    width: min(calc(100% - 28px), var(--content));
  }

  .signal-strip > div {
    min-height: 92px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

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

  .system-flow {
    grid-template-columns: 1fr;
  }

  .system-flow i {
    transform: rotate(90deg);
    justify-self: center;
  }

  .article-toc {
    position: static;
    margin-bottom: 56px;
  }

  .article-body h2 {
    margin-top: 58px;
  }

  .price-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .article-cta {
    margin-top: 58px;
    padding: 30px 24px;
  }

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

  .cta-actions .button,
  .cta-actions .text-action {
    width: 100%;
    text-align: center;
  }

  .article-faq summary {
    grid-template-columns: 38px 1fr auto;
    font-size: 18px;
  }

  .article-faq details p {
    margin-left: 50px;
  }

  .related {
    padding: 76px 0;
  }

  .related-links a {
    grid-template-columns: 54px 1fr auto;
    gap: 10px;
  }

  .resource-footer-top {
    padding-bottom: 48px;
  }

  .resource-footer-bottom {
    flex-direction: column;
  }
}

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

  .resource-card img {
    transition: none;
  }
}