:root {
  --ink: #101518;
  --ink-soft: #263236;
  --paper: #f7f5ef;
  --paper-strong: #fffdf8;
  --line: #d6d0c2;
  --teal: #006b70;
  --teal-dark: #03464b;
  --copper: #c2673f;
  --gold: #b8943f;
  --white: #ffffff;
  --shadow: rgba(16, 21, 24, 0.18);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

a {
  color: inherit;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 14px clamp(18px, 5vw, 64px);
  color: var(--white);
  background: rgba(16, 21, 24, 0.78);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(14px);
}

.brand,
.nav-links,
.hero-actions,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  min-width: 0;
  font-weight: 750;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  flex: 0 0 34px;
  color: var(--ink);
  background: var(--paper-strong);
  border: 1px solid rgba(255, 255, 255, 0.52);
  border-radius: 8px;
}

.nav-links {
  gap: clamp(12px, 3vw, 30px);
  font-size: 14px;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.82);
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--white);
}

.hero {
  position: relative;
  min-height: 82svh;
  display: flex;
  align-items: flex-end;
  padding: 138px clamp(18px, 6vw, 80px) clamp(44px, 8vw, 86px);
  color: var(--white);
  background-image: url("assets/synthetic-eye-hero.png");
  background-size: cover;
  background-position: center;
  isolation: isolate;
}

.hero-home {
  background-position: center 42%;
}

.hero-synthetic {
  background-position: center 47%;
}

.hero-shade {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(90deg, rgba(8, 16, 18, 0.86) 0%, rgba(8, 16, 18, 0.72) 36%, rgba(8, 16, 18, 0.34) 100%),
    linear-gradient(0deg, rgba(8, 16, 18, 0.88) 0%, rgba(8, 16, 18, 0.08) 54%);
}

.hero-content {
  width: min(760px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--copper);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f0c26d;
}

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

h1 {
  margin: 0;
  font-size: clamp(54px, 10vw, 122px);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 5vw, 58px);
  line-height: 1.02;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  font-size: 22px;
  line-height: 1.16;
}

.lead {
  max-width: 680px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: clamp(19px, 2.6vw, 28px);
  line-height: 1.28;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 750;
  line-height: 1;
  text-decoration: none;
  transition: transform 160ms ease, background 160ms ease, border-color 160ms ease;
}

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

.button.primary {
  color: var(--white);
  background: var(--teal);
  border-color: rgba(255, 255, 255, 0.16);
}

.button.primary:hover {
  background: var(--teal-dark);
}

.button.secondary {
  color: var(--white);
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.34);
}

.intro-band {
  background: var(--ink);
  color: var(--white);
  padding: 22px clamp(18px, 5vw, 64px);
}

.intro-grid {
  display: grid;
  grid-template-columns: 0.7fr 1.4fr 1.3fr;
  align-items: center;
  gap: 22px;
  max-width: 1180px;
  margin: 0 auto;
}

.intro-grid p,
.intro-grid strong,
.intro-grid span {
  margin: 0;
}

.intro-grid p {
  color: #f0c26d;
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.intro-grid strong {
  font-size: clamp(18px, 2vw, 24px);
}

.intro-grid span {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.5;
}

.section {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  padding: clamp(64px, 9vw, 112px) 0;
}

.section-heading {
  max-width: 780px;
  margin-bottom: 34px;
}

.section-heading.compact {
  margin-bottom: 0;
}

.section-heading p,
.copy-stack p,
.feature-card p,
.process-item p,
.contact-section p {
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.56;
}

.section-heading p {
  margin: 16px 0 0;
}

.section-heading .eyebrow {
  margin-top: 0;
  color: var(--copper);
  font-size: 13px;
  line-height: 1;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature-card {
  min-height: 260px;
  padding: 24px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 18px 45px rgba(16, 21, 24, 0.06);
}

.feature-card h3 {
  margin-top: 14px;
}

.feature-card h3:first-child {
  margin-top: 0;
}

.feature-card p {
  margin: 14px 0 0;
}

.card-number {
  display: block;
  color: var(--gold);
  font-weight: 850;
}

.text-link {
  display: inline-block;
  margin-top: 28px;
  color: var(--teal);
  font-weight: 800;
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 7vw, 86px);
  align-items: start;
}

.copy-stack {
  display: grid;
  gap: 18px;
}

.copy-stack p {
  margin: 0;
}

.process-list {
  display: grid;
  gap: 14px;
}

.process-item {
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 20px;
  padding: 24px;
  background: var(--paper-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.process-item span {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  color: var(--white);
  background: var(--teal);
  border-radius: 8px;
  font-weight: 850;
}

.process-item p {
  margin: 10px 0 0;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto clamp(32px, 6vw, 72px);
  padding: clamp(28px, 5vw, 46px);
  color: var(--white);
  background: var(--ink);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  box-shadow: 0 22px 60px var(--shadow);
}

.contact-section h2 {
  font-size: clamp(30px, 4vw, 48px);
}

.contact-section p {
  max-width: 680px;
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

.contact-section .eyebrow {
  color: #f0c26d;
}

.site-footer {
  justify-content: space-between;
  gap: 16px;
  min-height: 78px;
  padding: 18px clamp(18px, 5vw, 64px);
  color: rgba(255, 255, 255, 0.76);
  background: #0b1012;
}

.site-footer a {
  text-decoration: none;
}

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

@media (max-width: 860px) {
  .site-header {
    position: absolute;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    min-height: auto;
  }

  .nav-links {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
  }

  .hero {
    min-height: 84svh;
    padding-top: 158px;
    background-position: 58% center;
  }

  .hero-shade {
    background:
      linear-gradient(90deg, rgba(8, 16, 18, 0.9) 0%, rgba(8, 16, 18, 0.68) 100%),
      linear-gradient(0deg, rgba(8, 16, 18, 0.86) 0%, rgba(8, 16, 18, 0.12) 60%);
  }

  .intro-grid,
  .two-column,
  .contact-section {
    grid-template-columns: 1fr;
  }

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

  .feature-card {
    min-height: auto;
  }

  .contact-section .button {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .brand {
    font-size: 15px;
  }

  .nav-links {
    flex-wrap: wrap;
    justify-content: flex-start;
  }

  .hero {
    min-height: 88svh;
    padding-bottom: 38px;
  }

  h1 {
    font-size: clamp(46px, 17vw, 72px);
  }

  .hero-actions,
  .hero-actions .button {
    width: 100%;
  }

  .process-item {
    grid-template-columns: 1fr;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}