:root {
  --forest: #0e6b2e;
  --resilience: #1fa849;
  --sage: #e8f5ec;
  --slate: #4a6e5f;
  --charcoal: #1c1f2e;
  --white: #ffffff;
  --line: #d6e8dc;
  --surface: #f7fbf8;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--charcoal);
  font-family: Inter, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  background: var(--white);
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 82px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(14, 107, 46, 0.12);
  backdrop-filter: blur(16px);
}

.brand img {
  width: 280px;
  min-width: 210px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--slate);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  padding: 10px 14px;
  text-decoration: none;
}

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

.site-nav .nav-cta {
  color: var(--white);
  background: var(--forest);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: var(--white);
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--forest);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 380px;
  gap: clamp(28px, 5vw, 70px);
  min-height: calc(100vh - 82px);
  padding: clamp(68px, 9vw, 118px) clamp(20px, 5vw, 72px) 42px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.96), rgba(255, 255, 255, 0.78)),
    url("assets/gdi-roadmap.png") center / cover;
  border-bottom: 1px solid var(--line);
}

.hero-content {
  max-width: 820px;
  align-self: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--forest);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 820px;
  margin-bottom: 24px;
  color: var(--forest);
  font-size: clamp(42px, 7vw, 86px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 22px;
  color: var(--forest);
  font-size: clamp(30px, 4.2vw, 54px);
  line-height: 1.1;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--charcoal);
  font-size: 21px;
  line-height: 1.25;
}

.hero-copy {
  max-width: 680px;
  color: var(--slate);
  font-size: clamp(18px, 2vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 18px;
  border: 1px solid var(--forest);
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  color: var(--white);
  background: var(--forest);
}

.button.secondary {
  color: var(--forest);
  background: var(--white);
}

.hero-panel {
  align-self: end;
  padding: 28px;
  background: var(--forest);
  color: var(--white);
}

.hero-mark {
  width: 118px;
  max-width: 100%;
  margin-bottom: 28px;
  padding: 12px;
  background: var(--white);
}

.panel-label {
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.panel-text {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: 19px;
}

.section {
  padding: clamp(64px, 8vw, 108px) clamp(20px, 5vw, 72px);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(28px, 6vw, 90px);
}

.body-copy {
  color: var(--slate);
  font-size: 18px;
}

.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.pillars article {
  min-height: 260px;
  padding: clamp(28px, 4vw, 48px);
  background: var(--surface);
}

.pillars span {
  display: block;
  margin-bottom: 44px;
  color: var(--resilience);
  font-weight: 800;
}

.pillars p,
.work-grid p,
.publication-list p {
  color: var(--slate);
}

.feature {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(28px, 5vw, 70px);
  align-items: center;
}

.feature-copy p {
  color: var(--slate);
  font-size: 18px;
}

.metrics {
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
}

.metrics div {
  padding: 18px;
  border-left: 5px solid var(--resilience);
  background: var(--sage);
}

.metrics dt {
  color: var(--forest);
  font-size: 22px;
  font-weight: 800;
}

.metrics dd {
  margin: 0;
  color: var(--slate);
}

.feature-media {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--surface);
  overflow: hidden;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 36px;
}

.work {
  background: var(--forest);
}

.work .eyebrow,
.work h2 {
  color: var(--white);
}

.work-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
}

.work-grid article {
  min-height: 250px;
  padding: 28px;
  background: #0b5c28;
}

.work-grid h3,
.work-grid p {
  color: var(--white);
}

.work-grid p {
  opacity: 0.82;
}

.roadmap {
  display: grid;
  grid-template-columns: minmax(320px, 0.55fr) minmax(0, 1fr);
  align-items: stretch;
  gap: 0;
  background: var(--sage);
}

.roadmap-text {
  padding: clamp(44px, 7vw, 84px) clamp(20px, 5vw, 72px);
}

.roadmap-text p {
  color: var(--slate);
  font-size: 18px;
}

.roadmap img {
  width: 100%;
  height: 100%;
  min-height: 430px;
  object-fit: cover;
  object-position: center;
}

.publication-list {
  display: grid;
  gap: 18px;
}

.publication-list article {
  display: grid;
  grid-template-columns: 150px minmax(220px, 0.8fr) minmax(260px, 1fr);
  gap: 24px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.pub-type {
  margin: 0;
  color: var(--forest);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  padding: 42px clamp(20px, 5vw, 72px);
  background: var(--charcoal);
  color: var(--white);
}

.site-footer img {
  width: 280px;
  padding: 0;
  background: var(--white);
}

.site-footer p {
  margin: 18px 0 0;
  color: rgba(255, 255, 255, 0.72);
}

address {
  display: grid;
  gap: 8px;
  align-content: center;
  font-style: normal;
}

address a {
  color: var(--white);
  text-decoration: none;
}

@media (max-width: 980px) {
  .hero,
  .split,
  .feature,
  .roadmap {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-panel {
    align-self: stretch;
  }

  .pillars,
  .work-grid {
    grid-template-columns: 1fr 1fr;
  }

  .publication-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 720px) {
  .site-header {
    min-height: 72px;
  }

  .brand img {
    width: 220px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 72px;
    right: 16px;
    left: 16px;
    display: none;
    padding: 14px;
    background: var(--white);
    border: 1px solid var(--line);
    box-shadow: 0 22px 44px rgba(14, 107, 46, 0.18);
  }

  .site-nav.is-open {
    display: grid;
  }

  .site-nav a {
    padding: 13px 14px;
  }

  .hero {
    padding-top: 54px;
  }

  .pillars,
  .work-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    grid-template-columns: 1fr;
  }
}