:root {
  --bg: #07090a;
  --bg-2: #0d1210;
  --card: #0f1512;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --green: #6ee7a4;
  --green-dim: #3a7a5a;
  --text: #eef1ee;
  --text-2: #a8b0aa;
  --text-3: #6b746e;
  --font-display: "Fraunces", Georgia, serif;
  --font-interface: "Inter", "Segoe UI", sans-serif;
  --container: 1080px;
  --transition: 220ms ease;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 76px;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  font-family: var(--font-interface);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

::selection {
  color: var(--bg);
  background: var(--green);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  color: inherit;
  font: inherit;
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 10000;
  top: -100px;
  left: 24px;
  padding: 0.7rem 1rem;
  color: var(--bg);
  background: var(--green);
  font-weight: 500;
  transition: top var(--transition);
}

.skip-link:focus {
  top: 16px;
}

:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
}

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: 76px;
  border-bottom: 1px solid transparent;
  transition: background var(--transition), border-color var(--transition), backdrop-filter var(--transition);
}

.site-header.scrolled {
  border-color: var(--line);
  background: rgba(7, 9, 10, 0.88);
  backdrop-filter: blur(16px);
}

.header-inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.logo {
  position: relative;
  z-index: 102;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.17em;
}

.logo span {
  color: var(--green);
}

.header-diagnostic-link {
  display: inline-flex;
  min-height: 40px;
  color: var(--text-2);
  font-size: 0.76rem;
  font-weight: 500;
  align-items: center;
  gap: 0.45rem;
  transition: color var(--transition), opacity var(--transition), transform var(--transition);
}

.header-diagnostic-link:hover {
  color: var(--green);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  display: flex;
  min-height: 100svh;
  padding: 9.5rem 0 4rem;
  align-items: center;
}

.hero::before {
  content: "";
  position: absolute;
  top: 16%;
  right: -10%;
  width: min(56vw, 680px);
  aspect-ratio: 1;
  border: 1px solid rgba(110, 231, 164, 0.07);
  border-radius: 50%;
  pointer-events: none;
}

.hero-inner {
  position: relative;
}

.eyebrow,
.section-kicker {
  margin: 0 0 1.4rem;
  color: var(--green);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.17em;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 930px;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.125rem, 9.2vw, 5.4rem);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.035em;
}

.hero h1 em {
  color: var(--green);
  font-weight: 400;
}

.hero-copy {
  max-width: 710px;
  margin: 1.8rem 0 0;
  color: var(--text-2);
  font-size: clamp(0.98rem, 2vw, 1.08rem);
}

.hero-actions {
  display: flex;
  margin-top: 2rem;
  flex-direction: column;
  align-items: stretch;
  gap: 0.9rem;
}

.button {
  display: inline-flex;
  min-height: 52px;
  padding: 0.78rem 1.15rem;
  border: 1px solid var(--green-dim);
  border-radius: 2px;
  font-size: 0.85rem;
  font-weight: 500;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  transition: border-color var(--transition), opacity var(--transition), transform var(--transition);
}

.button-primary {
  color: var(--bg);
  background: var(--green);
}

.button:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.case-link {
  color: var(--text-2);
  font-size: 0.84rem;
}

.institutional-line {
  display: flex;
  max-width: 710px;
  margin-top: 3.5rem;
  padding-top: 1.15rem;
  border-top: 1px solid var(--line);
  color: var(--text-3);
  font-size: 0.69rem;
  line-height: 1.5;
  flex-direction: column;
  gap: 0.35rem;
}

.institutional-line strong {
  color: var(--text-2);
  font-weight: 500;
  letter-spacing: 0.08em;
}

.institutional-line i {
  display: none;
}

.change-section {
  padding: 6rem 0;
  border-top: 1px solid var(--line);
  background: var(--bg-2);
}

.editorial-grid {
  display: grid;
  gap: 2.5rem;
}

.section-marker {
  display: flex;
  color: var(--text-3);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  align-items: center;
  gap: 0.75rem;
}

.section-marker i {
  width: 32px;
  height: 1px;
  background: var(--green-dim);
}

.editorial-content {
  min-width: 0;
}

.editorial-content h2 {
  max-width: 840px;
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 7.5vw, 4.25rem);
  font-weight: 400;
  line-height: 1.09;
  letter-spacing: -0.03em;
}

.editorial-copy {
  max-width: 720px;
  margin-top: 2.75rem;
}

.editorial-copy > p {
  margin: 0 0 1.35rem;
  color: var(--text-2);
  font-size: clamp(1rem, 2vw, 1.08rem);
}

blockquote {
  margin: 3rem 0;
  padding: 0.15rem 0 0.15rem 1.35rem;
  border-left: 2px solid var(--green-dim);
}

blockquote p {
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(1.55rem, 5.5vw, 2.45rem);
  font-style: italic;
  line-height: 1.28;
}

.site-footer {
  padding: 2.5rem 0;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.site-footer p {
  margin: 0;
  color: var(--text-3);
  font-size: 0.7rem;
}

@media (min-width: 560px) {
  .hero-actions {
    flex-direction: row;
    align-items: center;
  }

  .button {
    min-width: 220px;
  }

  .institutional-line {
    flex-direction: row;
    align-items: center;
    gap: 0.8rem;
  }

  .institutional-line i {
    display: block;
    width: 1px;
    height: 14px;
    background: var(--line-strong);
  }

  .footer-inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 768px) {
  .hero {
    padding-top: 10rem;
  }

  .change-section {
    padding: 9rem 0;
  }

  .editorial-grid {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 3rem;
  }

  .section-marker {
    align-self: start;
    padding-top: 0.4rem;
    flex-direction: column;
    align-items: flex-start;
  }

  .section-marker i {
    width: 1px;
    height: 44px;
    margin-left: 0.2rem;
  }
}

@media (min-width: 1100px) {
  .editorial-grid {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 4.5rem;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

.study-section {
  padding: 6rem 0;
  border-top: 1px solid var(--line);
  background: var(--bg);
}

.methodology-section,
.assessment-section {
  background: var(--bg-2);
}

.study-intro,
.case-subtitle {
  max-width: 720px;
  margin: 2.5rem 0 0;
  color: var(--text-2);
  font-size: clamp(1rem, 2vw, 1.08rem);
}

.comparison-grid {
  display: grid;
  margin-top: 4rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.query-example {
  margin: 2rem 0;
  padding: 1.4rem 0 1.4rem 1.35rem;
  border-left: 1px solid var(--green-dim);
}

.query-example > span {
  display: block;
  margin-bottom: 0.65rem;
  color: var(--text-3);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.query-example p {
  max-width: 650px;
  margin: 0;
  color: var(--text);
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 3.5vw, 1.65rem);
  line-height: 1.35;
}

.office-questions {
  max-width: 720px;
  margin-top: 2.5rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.office-questions > p {
  margin: 0 0 1rem;
  color: var(--text-3);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.office-questions ul {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  gap: 0.75rem;
}

.office-questions li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--text-2);
  font-size: 0.92rem;
}

.office-questions li::before {
  content: "";
  position: absolute;
  top: 0.75em;
  left: 0;
  width: 4px;
  height: 4px;
  background: var(--green-dim);
}

.study-followup {
  max-width: 720px;
  margin: 2rem 0 0;
  color: var(--text-2);
  font-size: clamp(1rem, 2vw, 1.08rem);
}

.comparison-column {
  padding: 2rem 0;
}

.comparison-column + .comparison-column {
  border-top: 1px solid var(--line);
}

.comparison-column h3,
.case-detail h3 {
  margin: 0 0 1.25rem;
  color: var(--text-3);
  font-size: 0.66rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.comparison-example {
  min-height: 4.8em;
  margin: 0 0 1.5rem;
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.18rem;
  line-height: 1.4;
}

.comparison-column ul,
.case-detail ul {
  display: grid;
  margin: 0;
  padding: 0;
  list-style: none;
  gap: 0.8rem;
}

.comparison-column li,
.case-detail li {
  position: relative;
  padding-left: 1.25rem;
  color: var(--text-2);
  font-size: 0.9rem;
}

.comparison-column li::before,
.case-detail li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 4px;
  height: 4px;
  background: var(--text-3);
}

.structured-column li::before,
.case-detail li::before {
  background: var(--green-dim);
}

.method-grid {
  display: grid;
  margin-top: 4rem;
  border-top: 1px solid var(--line);
}

.method-step {
  padding: 2rem 0;
  border-bottom: 1px solid var(--line);
}

.method-step > span {
  display: block;
  margin-bottom: 1rem;
  color: var(--green-dim);
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.method-step h3 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 400;
}

.method-step p,
.case-detail p {
  margin: 0;
  color: var(--text-2);
  font-size: 0.9rem;
}

.case-subtitle {
  max-width: 680px;
}

.case-study-grid {
  display: grid;
  margin-top: 4rem;
  gap: 3rem;
}

.case-screenshot {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--card);
  overflow: hidden;
}

.case-screenshot img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
}

.case-details {
  display: grid;
}

.case-detail {
  padding: 0 0 1.6rem;
  border-bottom: 1px solid var(--line);
}

.case-detail + .case-detail {
  padding-top: 1.6rem;
}

.case-learning p {
  color: var(--text);
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-style: italic;
  line-height: 1.4;
}

.assessment-content {
  max-width: 840px;
}

.assessment-action {
  display: flex;
  margin-top: 2.5rem;
  flex-direction: column;
  align-items: stretch;
  gap: 1rem;
}

.assessment-summary {
  max-width: 720px;
  margin: 1rem 0 0;
  color: var(--text-2);
  font-size: clamp(1rem, 2vw, 1.08rem);
}

.assessment-action > p {
  display: flex;
  margin: 0;
  color: var(--text-3);
  font-size: 0.68rem;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
}

@media (min-width: 560px) {
  .assessment-action {
    align-items: flex-start;
  }
}

@media (min-width: 768px) {
  .study-section {
    padding: 9rem 0;
  }

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

  .comparison-column {
    padding: 2.5rem 2.5rem 2.5rem 0;
  }

  .comparison-column + .comparison-column {
    padding-left: 2.5rem;
    border-top: 0;
    border-left: 1px solid var(--line);
  }

  .method-step:nth-child(odd) {
    padding-right: 2.5rem;
    border-right: 1px solid var(--line);
  }

  .method-step:nth-child(even) {
    padding-left: 2.5rem;
  }

}

@media (min-width: 1024px) {
  .case-study-grid {
    grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
    align-items: start;
    gap: 4rem;
  }
}

@media (min-width: 1100px) {
  .case-study-grid {
    gap: 5rem;
  }
}