:root {
  --bg: #f7f8f5;
  --ink: #181a1f;
  --muted: #5f6670;
  --panel: #ffffff;
  --line: #d9ddd4;
  --green: #207a4a;
  --red: #b63f35;
  --amber: #9a6b13;
  --blue: #2f6fa3;
  --focus: #245f8f;
  --radius: 8px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  letter-spacing: 0;
}

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

a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.site-nav {
  position: absolute;
  z-index: 2;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 22px clamp(18px, 5vw, 64px);
  color: #ffffff;
}

.page-nav {
  position: static;
  background: #171a1f;
}

.brand,
.site-nav nav,
.kicker,
.eyebrow,
.button,
footer {
  font-family: var(--mono);
}

.brand {
  font-weight: 700;
  font-size: 0.88rem;
}

.site-nav nav {
  display: flex;
  gap: 18px;
  font-size: 0.78rem;
}

.hero {
  min-height: 74vh;
  display: grid;
  align-items: center;
  padding: 108px clamp(20px, 6vw, 76px) 64px;
  color: #ffffff;
  background:
    linear-gradient(90deg, rgba(12, 14, 18, 0.88), rgba(12, 14, 18, 0.58) 48%, rgba(12, 14, 18, 0.2)),
    url("methodology-preview.png") center right / cover no-repeat;
}

.hero-copy {
  max-width: 760px;
}

.eyebrow,
.kicker {
  margin: 0 0 12px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.78rem;
  color: var(--blue);
}

.hero .eyebrow {
  color: #9fd1ff;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin-bottom: 18px;
  font-size: clamp(2.4rem, 8vw, 5.6rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.lead {
  max-width: 680px;
  font-size: clamp(1.05rem, 2.6vw, 1.35rem);
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.88);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 42px;
  padding: 0 16px;
  border: 1px solid rgba(255, 255, 255, 0.56);
  border-radius: var(--radius);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.button.primary {
  background: #ffffff;
  color: var(--ink);
  border-color: #ffffff;
}

.access-note {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.9rem;
}

main > section:not(.hero) {
  max-width: 1180px;
  margin: 0 auto;
  padding: 54px clamp(18px, 4vw, 38px);
}

.reference-page {
  padding-top: 18px;
}

.intro,
.caveat {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(280px, 1.2fr);
  gap: clamp(22px, 6vw, 74px);
  border-bottom: 1px solid var(--line);
}

.intro h2,
.caveat h2,
.pillars h2 {
  font-size: clamp(1.7rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.intro p,
.caveat p,
.pillar-grid p {
  line-height: 1.65;
  color: var(--muted);
}

.preview {
  padding-top: 28px !important;
  padding-bottom: 28px !important;
}

.preview img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.section-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: end;
  margin-bottom: 24px;
}

.pillar-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 12px;
}

.pillar-grid article {
  min-height: 210px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
}

.pillar-grid span {
  display: inline-block;
  margin-bottom: 22px;
  font-family: var(--mono);
  color: var(--green);
}

.pillar-grid h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

footer {
  max-width: 1180px;
  margin: 0 auto;
  padding: 26px clamp(18px, 4vw, 38px) 44px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 760px) {
  .site-nav {
    position: absolute;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .site-nav nav {
    flex-wrap: wrap;
  }

  .hero {
    min-height: 82vh;
    padding-top: 154px;
    background-position: center;
  }

  .intro,
  .caveat,
  .section-head {
    grid-template-columns: 1fr;
    display: grid;
  }

  footer {
    flex-direction: column;
  }
}