:root {
  color-scheme: light;
  --ink: #111214;
  --muted: #59616b;
  --line: #d9dde3;
  --paper: #fbfaf7;
  --panel: #ffffff;
  --charcoal: #101214;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
a { color: inherit; }
.site-header, .site-footer {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 18px clamp(18px, 4vw, 56px);
}
.brand, .nav-cta, .button {
  font-weight: 800;
  text-decoration: none;
}
nav { display: flex; gap: 18px; }
nav a { color: var(--muted); font-size: 14px; text-decoration: none; }
.hero {
  display: grid;
  gap: 28px;
  grid-template-columns: minmax(0, .9fr) minmax(420px, 1.1fr);
  min-height: calc(100vh - 80px);
  padding: clamp(28px, 5vw, 72px) clamp(18px, 4vw, 56px);
}
.eyebrow {
  color: var(--muted);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1 {
  font-size: clamp(44px, 7vw, 94px);
  letter-spacing: 0;
  line-height: .96;
  margin: 0;
}
.hero-lede {
  color: #3f454d;
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.42;
  max-width: 720px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.button, .nav-cta {
  border: 1px solid var(--ink);
  border-radius: 6px;
  display: inline-flex;
  min-height: 42px;
  padding: 0 16px;
  align-items: center;
}
.primary { background: var(--ink); color: #fff; }
.secondary { background: #fff; }
.hero-board {
  align-content: start;
  align-self: start;
  display: grid;
  gap: 12px;
}
.hero-visual {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0;
  overflow: hidden;
}
.hero-visual img {
  aspect-ratio: 16 / 10;
  display: block;
  height: auto;
  object-fit: cover;
  width: 100%;
}
.hero-products {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
@media (min-width: 1100px) {
  .hero-products {
    gap: 8px;
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
  .hero-products .product-card {
    min-height: 96px;
    padding: 14px 12px;
  }
  .hero-products .product-card h3 {
    font-size: clamp(18px, 1.28vw, 21px);
    margin-bottom: 0;
  }
  .hero-products .product-card .eyebrow {
    font-size: 10px;
    margin-bottom: 8px;
  }
  .hero-products .product-card p:not(.eyebrow),
  .hero-products .product-card .product-link {
    display: none;
  }
}
.product-card {
  background: #fff;
  border: 1px solid var(--line);
  border-left: 5px solid var(--accent);
  border-radius: 8px;
  min-height: 138px;
  padding: 18px;
}
.product-card:focus-within,
.product-card.is-active {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--line));
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 14%, transparent);
}
.product-card h3 { font-size: 24px; line-height: 1.05; margin: 0 0 10px; }
.product-card p { color: var(--muted); line-height: 1.5; margin: 0 0 10px; }
.pilot-use { color: #2f353c !important; font-weight: 700; }
.product-link { font-weight: 800; text-underline-offset: 3px; }
.thesis-band,
.proof-band,
.pilot-band,
.final-cta,
.page-hero,
.product-grid,
.experiment-sections,
.process,
.principles {
  padding: clamp(34px, 6vw, 84px) clamp(18px, 4vw, 56px);
}
.thesis-band,
.pilot-band,
.final-cta {
  border-top: 1px solid var(--line);
}
.thesis-band h2,
.pilot-band h2,
.final-cta h2 {
  font-size: clamp(32px, 4vw, 58px);
  line-height: 1.04;
  margin: 0;
  max-width: 900px;
}
.thesis-band p,
.pilot-band p {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
  max-width: 900px;
}
.proof-band {
  background: #fff;
  border-top: 1px solid var(--line);
}
.proof-grid {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-top: 18px;
}
.proof-grid a {
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 800;
  min-height: 72px;
  padding: 16px;
  text-underline-offset: 3px;
}
.pilot-band {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
}
.final-cta {
  align-items: center;
  display: flex;
  gap: 24px;
  justify-content: space-between;
}
.page-hero h1 {
  font-size: clamp(42px, 7vw, 86px);
  line-height: .98;
  margin: 0;
  max-width: 980px;
}
.page-hero p,
.process p,
.principles li {
  color: var(--muted);
  font-size: 18px;
  line-height: 1.55;
  max-width: 820px;
}
.product-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}
.experiment-sections {
  display: grid;
  gap: 14px;
}
.experiment-detail {
  border-top: 3px solid var(--accent);
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(180px, .55fr) minmax(0, 1fr) minmax(0, 1fr) auto;
  padding: 22px 0;
}
.experiment-detail h2 {
  font-size: clamp(28px, 3vw, 44px);
  line-height: 1.05;
  margin: 0;
}
.experiment-detail p {
  color: var(--muted);
  line-height: 1.5;
  margin: 0;
}
.experiment-detail strong {
  color: var(--ink);
}
.process ol,
.principles ul {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 22px 0 0;
  max-width: 880px;
  padding: 0;
}
.process li,
.principles li {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}
.site-footer { border-top: 1px solid var(--line); color: var(--muted); }
@media (max-width: 900px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  nav { flex-wrap: wrap; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .experiment-detail,
  .pilot-band,
  .final-cta {
    align-items: flex-start;
    grid-template-columns: 1fr;
    flex-direction: column;
  }
  .proof-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .product-grid,
  .hero-products { grid-template-columns: 1fr; }
  .proof-grid { grid-template-columns: 1fr; }
  .site-footer { align-items: flex-start; flex-direction: column; }
}