:root {
  color-scheme: light;
  --paper: #faf7ed;
  --paper-strong: #fffdf7;
  --ink: #1f2424;
  --ink-soft: #485152;
  --muted: #66706d;
  --rule: #d8d1bf;
  --rule-strong: #bdb49f;
  --accent: #c8a227;
  --accent-soft: #f2df9d;
  --blue: #2f6376;
  --blue-soft: #dcecf0;
  --green: #557d61;
  --green-soft: #e1ecdf;
  --rust: #9a5b3b;
  --shadow: 0 18px 42px rgba(31, 36, 36, 0.1);
  --max: 1120px;
  --radius: 8px;
  --font: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.72), rgba(255, 255, 255, 0) 360px),
    var(--paper);
  color: var(--ink);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.55;
  letter-spacing: 0;
  overflow-x: hidden;
  -webkit-tap-highlight-color: rgba(47, 99, 118, 0.18);
}

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

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--blue);
}

a:focus-visible,
.button:focus-visible {
  outline: 3px solid rgba(47, 99, 118, 0.34);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 10;
  background: var(--ink);
  color: white;
  padding: 10px 14px;
  border-radius: 6px;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 5;
  border-bottom: 1px solid rgba(216, 209, 191, 0.78);
  background: rgba(250, 247, 237, 0.9);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(100% - 36px, var(--max));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-weight: 750;
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--ink-soft);
  font-size: 14px;
}

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

.nav-links a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

.page {
  overflow: clip;
}

.section {
  width: min(100% - 36px, var(--max));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  gap: clamp(28px, 5vw, 62px);
  align-items: center;
  min-height: calc(100vh - 68px);
  padding: 54px 0 44px;
}

.hero-copy {
  max-width: 560px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(52px, 7.8vw, 92px);
  line-height: 0.96;
  font-weight: 760;
  letter-spacing: 0;
  text-wrap: balance;
  overflow-wrap: break-word;
}

.case-hero h1 {
  margin: 0;
  font-size: 65px;
  line-height: 0.96;
  font-weight: 760;
  letter-spacing: 0;
  text-wrap: balance;
  overflow-wrap: normal;
  word-break: normal;
}

.hero-subhead,
.case-subhead {
  margin: 22px 0 0;
  color: var(--ink);
  font-size: clamp(22px, 2.1vw, 30px);
  line-height: 1.22;
  font-weight: 650;
}

.proof-line {
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.5;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border-radius: 7px;
  border: 1px solid var(--rule-strong);
  padding: 0 16px;
  color: var(--ink);
  background: var(--paper-strong);
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
  box-shadow: 0 1px 0 rgba(31, 36, 36, 0.06);
  touch-action: manipulation;
  transition: transform 160ms ease, border-color 160ms ease, background-color 160ms ease, color 160ms ease;
}

.button svg {
  width: 17px;
  height: 17px;
  flex: 0 0 auto;
}

.button.primary {
  border-color: #b59624;
  background: var(--accent);
}

.button:hover {
  transform: translateY(-1px);
  color: var(--ink);
}

.media-frame {
  overflow: hidden;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-strong);
  box-shadow: var(--shadow);
}

.media-frame img {
  width: 100%;
  height: auto;
}

.hero-media {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.caption {
  margin: 11px 2px 0;
  color: var(--muted);
  font-size: 13px;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin: -12px auto 78px;
  border: 1px solid var(--rule);
  background: var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
}

.proof-item {
  min-height: 156px;
  padding: 20px;
  background: rgba(255, 253, 247, 0.78);
}

.proof-item b,
.link-row b {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
}

.proof-item p,
.link-row p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.45;
}

.marker {
  width: 28px;
  height: 4px;
  margin-bottom: 18px;
  border-radius: 999px;
  background: var(--accent);
}

.marker.blue {
  background: var(--blue);
}

.marker.green {
  background: var(--green);
}

.marker.rust {
  background: var(--rust);
}

.band {
  border-top: 1px solid var(--rule);
  padding: 82px 0;
}

.band.alt {
  background: rgba(255, 253, 247, 0.62);
}

.section-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(340px, 1.08fr);
  gap: clamp(28px, 5vw, 58px);
  align-items: start;
}

.section-label {
  margin: 0 0 12px;
  color: var(--rust);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.section h2,
.band h2 {
  margin: 0;
  font-size: clamp(32px, 4.5vw, 52px);
  line-height: 1.04;
  letter-spacing: 0;
  text-wrap: balance;
  overflow-wrap: break-word;
  scroll-margin-top: 96px;
}

.lead {
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.boundary {
  margin-top: 22px;
  border-left: 4px solid var(--accent);
  padding: 12px 0 12px 16px;
  color: var(--ink-soft);
  font-size: 15px;
  background: rgba(242, 223, 157, 0.18);
}

.evidence-list {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.evidence-list li {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  color: var(--ink-soft);
}

.check {
  width: 22px;
  height: 22px;
  border: 1px solid var(--green);
  border-radius: 50%;
  color: var(--green);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  line-height: 1;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 16px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--rule);
}

.metric {
  background: var(--paper-strong);
  padding: 15px;
}

.metric strong {
  display: block;
  font-size: 22px;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.metric span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.four-d-grid,
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.four-d-card,
.case-card {
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-strong);
  padding: 18px;
}

.four-d-card h2,
.four-d-card h3,
.case-card h3 {
  margin: 0 0 10px;
  font-size: 16px;
  line-height: 1.24;
  overflow-wrap: break-word;
  scroll-margin-top: 96px;
}

.four-d-card p,
.case-card p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.link-panel {
  border-top: 1px solid var(--rule);
}

.link-row {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr) auto;
  gap: 20px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--rule);
}

.status {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  padding: 6px 10px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.status.ready {
  border-color: var(--green);
  color: var(--green);
}

.case-hero {
  padding: 62px 0;
}

.case-hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
  gap: clamp(28px, 5vw, 58px);
  align-items: center;
}

.case-body {
  display: grid;
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
  gap: clamp(28px, 5vw, 58px);
  align-items: start;
}

.sticky-note {
  position: sticky;
  top: 96px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-strong);
  padding: 18px;
}

.sticky-note p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
}

.note-spaced {
  margin-top: 16px;
}

.content-stack {
  display: grid;
  gap: 34px;
}

.content-block h2 {
  font-size: 27px;
  line-height: 1.18;
}

.content-block p {
  color: var(--ink-soft);
}

.content-block ul {
  margin: 16px 0 0;
  padding-left: 20px;
  color: var(--ink-soft);
}

.content-block li + li {
  margin-top: 8px;
}

.image-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.footer {
  border-top: 1px solid var(--rule);
  padding: 28px 0 42px;
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  width: min(100% - 36px, var(--max));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 20px;
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 900px) {
  .nav {
    min-height: 64px;
  }

  .nav-links {
    gap: 14px;
    font-size: 13px;
  }

  .hero,
  .section-grid,
  .case-hero-inner,
  .case-body {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 42px;
  }

  .case-hero {
    padding: 36px 0 32px;
  }

  .hero h1 {
    font-size: clamp(44px, 13vw, 68px);
  }

  .case-hero h1 {
    font-size: 58px;
  }

  .hero-media {
    align-self: auto;
  }

  .proof-strip,
  .case-grid,
  .image-pair {
    grid-template-columns: 1fr;
  }

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

  .band .four-d-grid {
    grid-template-columns: 1fr;
  }

  .proof-strip {
    margin-top: 0;
  }

  .link-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .status {
    width: fit-content;
  }

  .sticky-note {
    position: static;
  }
}

@media (max-width: 620px) {
  .nav {
    width: min(100% - 28px, var(--max));
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 12px 0;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
  }

  .section,
  .footer-inner {
    width: min(100% - 28px, var(--max));
  }

  .hero {
    padding-bottom: 34px;
  }

  .case-hero {
    padding: 16px 0 14px;
  }

  .case-hero-inner {
    gap: 22px;
  }

  .actions {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .case-subhead {
    margin-top: 14px;
  }

  .case-hero .proof-line {
    margin-top: 12px;
  }

  .case-hero .boundary {
    margin-top: 16px;
    padding-top: 10px;
    padding-bottom: 10px;
  }

  .case-hero h1 {
    font-size: 46px;
  }

  .case-hero .four-d-grid {
    gap: 8px;
  }

  .case-hero .four-d-card {
    padding: 10px;
  }

  .case-hero .four-d-card h2,
  .case-hero .four-d-card h3 {
    margin-bottom: 6px;
    font-size: 14px;
  }

  .case-hero .four-d-card p {
    font-size: 12px;
    line-height: 1.32;
  }

  .metric-row {
    grid-template-columns: 1fr;
  }

  .four-d-card,
  .case-card {
    padding: 14px;
  }

  .band {
    padding: 58px 0;
  }
}