:root {
  color-scheme: light;
  --adit-white: #ffffff;
  --adit-black: #0b0d10;
  --adit-black-alt: #050505;
  --adit-ink: #111111;
  --adit-deep-blue: #315c72;
  --adit-sage: #5e716a;
  --adit-ochre: #8a6f3d;
  --adit-warm-off-white: #f5f5f2;
  --adit-warm-off-white-alt: #f4f5f2;
  --adit-pale-grey: #d8d8d2;
  --adit-body-grey: #505050;
  --adit-body-grey-alt: #545454;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  color: var(--adit-ink);
  background: var(--adit-warm-off-white);
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 4vw, 56px);
  color: var(--adit-ink);
  background:
    linear-gradient(
      to bottom,
      rgba(245, 245, 242, 0.98),
      rgba(245, 245, 242, 0.86),
      rgba(245, 245, 242, 0)
    );
}

.brand,
.site-nav {
  display: flex;
  align-items: center;
}

.brand {
  text-decoration: none;
}

.brand img {
  display: block;
  width: clamp(132px, 13vw, 164px);
  height: auto;
}

.site-nav {
  gap: clamp(14px, 2.5vw, 30px);
  font-size: 0.9rem;
  font-weight: 600;
}

.site-nav a {
  color: var(--adit-deep-blue);
  text-decoration: none;
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--adit-ink);
}

.hero {
  position: relative;
  min-height: 84svh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: var(--adit-ink);
  background: var(--adit-warm-off-white);
}

.hero-bg,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-bg {
  background-image: url("assets/immune-complex-hero.jpg");
  background-size: cover;
  background-position: center right;
}

.hero-shade {
  background:
    linear-gradient(
      90deg,
      rgba(245, 245, 242, 0.98) 0%,
      rgba(245, 245, 242, 0.9) 42%,
      rgba(245, 245, 242, 0.42) 100%
    ),
    linear-gradient(
      0deg,
      rgba(245, 245, 242, 0.92) 0%,
      rgba(245, 245, 242, 0.1) 62%
    );
}

.hero-content {
  position: relative;
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
  padding: 136px 0 78px;
}

.hero-logo {
  display: block;
  width: clamp(190px, 22vw, 286px);
  height: auto;
  margin: 0 0 44px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--adit-deep-blue);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-accent .eyebrow {
  color: var(--adit-warm-off-white);
}

.hero .eyebrow {
  color: var(--adit-deep-blue);
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(2.85rem, 7vw, 6.6rem);
  line-height: 0.96;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4.5vw, 4rem);
  line-height: 1;
  letter-spacing: 0;
}

h3 {
  margin: 16px 0 12px;
  font-size: 1.2rem;
  line-height: 1.2;
}

p {
  font-size: 1rem;
  line-height: 1.72;
}

.hero-copy {
  max-width: 660px;
  margin: 28px 0 26px;
  color: var(--adit-body-grey);
  font-size: clamp(1.12rem, 2.2vw, 1.45rem);
  line-height: 1.5;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--adit-deep-blue);
  font-weight: 700;
  text-decoration-color: var(--adit-ochre);
}

.section {
  padding: clamp(72px, 10vw, 124px) 0;
}

.section-inner {
  width: min(100% - 40px, var(--max));
  margin: 0 auto;
}

.section-light {
  background: var(--adit-warm-off-white);
}

.section-accent {
  color: var(--adit-white);
  background: var(--adit-deep-blue);
  border-top: 1px solid rgba(216, 216, 210, 0.18);
  border-bottom: 1px solid rgba(216, 216, 210, 0.18);
}

.section-legal {
  background: var(--adit-white);
  border-top: 1px solid var(--adit-pale-grey);
}

.two-column,
.legal-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(34px, 7vw, 88px);
}

.copy-stack p,
.legal-copy p {
  margin: 0 0 22px;
  color: var(--adit-body-grey);
}

.copy-stack p:first-child {
  color: var(--adit-ink);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.55;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin-top: clamp(36px, 7vw, 72px);
  border-top: 1px solid rgba(216, 216, 210, 0.22);
  border-bottom: 1px solid rgba(216, 216, 210, 0.22);
}

.principles > div {
  min-height: 250px;
  padding: 30px clamp(20px, 3vw, 34px);
  border-right: 1px solid rgba(216, 216, 210, 0.22);
}

.principles > div:last-child {
  border-right: 0;
}

.principle-index {
  color: var(--adit-ochre);
  font-size: 0.8rem;
  font-weight: 800;
}

.principles p {
  margin: 0;
  color: var(--adit-pale-grey);
}

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

.legal-copy a,
.copy-stack a {
  color: var(--adit-ink);
  font-weight: 700;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 22px;
  flex-wrap: wrap;
  min-height: 92px;
  padding: 24px;
  color: var(--adit-pale-grey);
  background: var(--adit-deep-blue);
  font-size: 0.9rem;
}

.site-footer a {
  color: var(--adit-white);
}

@media (max-width: 760px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding: 18px 20px;
  }

  .brand img {
    width: 128px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 0.82rem;
  }

  .hero {
    min-height: 82svh;
  }

  .hero-bg {
    background-position: 62% center;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(245, 245, 242, 0.98), rgba(245, 245, 242, 0.72)),
      linear-gradient(0deg, rgba(245, 245, 242, 0.92), rgba(245, 245, 242, 0.16));
  }

  .hero-content {
    width: min(100% - 32px, var(--max));
    padding: 162px 0 52px;
  }

  .hero-logo {
    width: 210px;
    margin-bottom: 34px;
  }

  .two-column,
  .legal-layout,
  .principles {
    grid-template-columns: 1fr;
  }

  .principles > div {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid rgba(216, 216, 210, 0.22);
  }

  .principles > div:last-child {
    border-bottom: 0;
  }
}