:root {
  color-scheme: light;
  --ink: #111513;
  --muted: #5b625d;
  --paper: #f7f5ee;
  --line: rgba(17, 21, 19, 0.13);
  --moss: #526b59;
  --copper: #a75f3b;
  --blue: #315f78;
  --white: rgba(255, 255, 255, 0.76);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#concept-map {
  position: fixed;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  background:
    linear-gradient(90deg, rgba(17, 21, 19, 0.055) 1px, transparent 1px),
    linear-gradient(0deg, rgba(17, 21, 19, 0.045) 1px, transparent 1px),
    radial-gradient(circle at 22% 26%, rgba(49, 95, 120, 0.18), transparent 28rem),
    radial-gradient(circle at 78% 16%, rgba(167, 95, 59, 0.12), transparent 28rem),
    var(--paper);
  background-size: 72px 72px, 72px 72px, auto, auto, auto;
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: rgba(247, 245, 238, 0.34);
}

.site-header,
main {
  position: relative;
  z-index: 2;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  color: var(--moss);
  font-size: 0.78rem;
  font-weight: 800;
}

.hero {
  display: flex;
  align-items: end;
  min-height: calc(100vh - 86px);
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 70px 0 96px;
}

.hero-copy {
  max-width: 850px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 18px;
  color: var(--copper);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 10ch;
  margin-bottom: 20px;
  font-size: clamp(4.6rem, 15vw, 12.5rem);
  line-height: 0.86;
  letter-spacing: 0;
}

.hero-line {
  max-width: 690px;
  color: #28302b;
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  line-height: 1.35;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  border-top: 1px solid var(--line);
  padding: 78px 0;
}

.thesis {
  max-width: 920px;
  margin-left: max(20px, calc((100vw - 1180px) / 2));
}

.section h2 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(2rem, 5vw, 4.6rem);
  line-height: 0.98;
}

.section p {
  max-width: 680px;
  color: var(--muted);
  font-size: 1.08rem;
  line-height: 1.7;
}

.principle-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin-top: 34px;
  background: var(--line);
}

.principle-grid article {
  min-height: 260px;
  background: rgba(255, 255, 255, 0.54);
  padding: 28px;
}

.principle-grid span {
  color: var(--copper);
  font-weight: 800;
}

.principle-grid h3 {
  margin: 72px 0 12px;
  font-size: 1.35rem;
}

@media (max-width: 820px) {
  .site-header {
    align-items: center;
  }

  .hero {
    display: block;
    min-height: auto;
    padding: 58px 0 74px;
  }

  h1 {
    font-size: clamp(4.1rem, 22vw, 7rem);
  }

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

  .principle-grid article {
    min-height: 210px;
  }

}

@media (max-width: 560px) {
  .site-header,
  .hero,
  .section {
    width: min(100% - 28px, 1180px);
  }

  .hero-line {
    font-size: 1.16rem;
  }

}