:root {
  color-scheme: light;
  --bg: #f7f8f5;
  --panel: #ffffff;
  --ink: #17201c;
  --muted: #5d6762;
  --line: #dfe4dd;
  --green: #246b4b;
  --green-dark: #154631;
  --blue: #2f5f8f;
  --gold: #b1811f;
  --shadow: 0 18px 48px rgba(23, 32, 28, 0.1);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid rgba(223, 228, 221, 0.88);
  background: rgba(247, 248, 245, 0.92);
  backdrop-filter: blur(16px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  height: 68px;
  margin: 0 auto;
}

.brand {
  color: var(--green-dark);
  font-weight: 800;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  gap: 24px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--green-dark);
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0;
}

.hero {
  min-height: auto;
  padding-top: 70px;
  padding-bottom: 76px;
}

.hero-copy {
  max-width: 1040px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

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

h1 {
  max-width: 100%;
  margin: 0;
  font-size: clamp(2.75rem, 5.2vw, 4.85rem);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 1.05rem;
  line-height: 1.25;
}

.lead {
  max-width: 670px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 1.17rem;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 16px;
  background: var(--panel);
  color: var(--ink);
  font-weight: 750;
  box-shadow: 0 6px 18px rgba(23, 32, 28, 0.06);
}

.button.primary {
  border-color: var(--green);
  background: var(--green);
  color: #fff;
}

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

.video-grid,
.figure-grid,
.pdf-grid,
.resource-list,
.steps,
.metrics {
  display: grid;
  gap: 18px;
}

figure {
  margin: 0;
}

.video-grid figure,
.figure-grid figure,
.pdf-grid figure,
.wide-figure,
.steps article,
.metrics article,
.resource-list article {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  box-shadow: var(--shadow);
}

.video-grid video {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0f1512;
  object-fit: cover;
  border-radius: 8px 8px 0 0;
}

figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 26px;
}

.abstract-section {
  display: grid;
  grid-template-columns: 0.72fr 1fr;
  gap: 42px;
  border-top: 1px solid var(--line);
}

.abstract-section p:not(.eyebrow) {
  margin: 0 0 16px;
  color: var(--muted);
  font-size: 1.06rem;
}

.wide-figure {
  overflow: hidden;
}

.wide-figure img {
  width: 100%;
  background: #fff;
}

.steps {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 22px;
}

.steps article {
  padding: 22px;
  box-shadow: none;
}

.steps span {
  display: block;
  margin-bottom: 28px;
  color: var(--blue);
  font-weight: 850;
}

.steps p,
.resource-list p {
  margin: 0;
  color: var(--muted);
}

.video-grid,
.figure-grid,
.pdf-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.pdf-grid figure {
  overflow: hidden;
}

.pdf-grid object {
  display: block;
  width: 100%;
  height: min(72vh, 720px);
  min-height: 520px;
  border: 0;
  background: #fff;
  border-radius: 8px 8px 0 0;
}

.pdf-grid object a {
  display: block;
  padding: 24px;
  color: var(--green-dark);
  font-weight: 800;
  text-decoration: underline;
}

.metrics {
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 22px;
}

.metrics article {
  min-height: 154px;
  padding: 22px;
  box-shadow: none;
}

.metrics strong {
  display: block;
  color: var(--green-dark);
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1;
}

.metrics span {
  display: block;
  margin-top: 14px;
  color: var(--muted);
  font-weight: 700;
}

.figure-grid figure {
  overflow: hidden;
}

.figure-grid img {
  width: 100%;
  min-height: 240px;
  object-fit: contain;
  padding: 18px;
  background: #fff;
}

.resources-section {
  padding-bottom: 90px;
}

.resource-list {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.resource-list article {
  min-height: 170px;
  padding: 24px;
  box-shadow: none;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 28px 20px;
  color: var(--muted);
  text-align: center;
}

.footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .abstract-section {
    grid-template-columns: 1fr;
  }

  .metrics,
  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .nav {
    width: min(100% - 28px, 1180px);
  }

  .nav-links {
    display: none;
  }

  .section {
    width: min(100% - 28px, 1180px);
    padding: 52px 0;
  }

  .hero {
    padding-top: 36px;
    padding-bottom: 52px;
  }

  h1 {
    font-size: 2.45rem;
  }

  .lead {
    font-size: 1.04rem;
  }

  .actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .button {
    justify-content: center;
  }

  .video-grid,
  .figure-grid,
  .pdf-grid,
  .resource-list,
  .metrics,
  .steps {
    grid-template-columns: 1fr;
  }

  .pdf-grid object {
    height: 68vh;
    min-height: 430px;
  }

  .metrics article {
    min-height: 128px;
  }
}