:root {
  color-scheme: light dark;
  --background: #f5f7fa;
  --surface: #ffffff;
  --text: #14213d;
  --muted: #526071;
  --accent: #006b5e;
  --accent-strong: #004f46;
  --border: #d9e1e8;
  --shadow: 0 18px 50px rgb(20 33 61 / 10%);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at top left, rgb(0 107 94 / 12%), transparent 34rem),
    var(--background);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

a {
  color: var(--accent);
  text-underline-offset: 0.2em;
}

a:hover {
  color: var(--accent-strong);
}

a:focus-visible {
  border-radius: 0.2rem;
  outline: 3px solid #ffb703;
  outline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--border);
  background: rgb(255 255 255 / 88%);
}

.nav,
main,
.site-footer {
  width: min(100% - 2rem, 70rem);
  margin-inline: auto;
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-block: 1rem;
}

.brand {
  color: var(--text);
  font-size: 1.15rem;
  font-weight: 750;
  text-decoration: none;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.5rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

main {
  min-height: calc(100vh - 13rem);
  padding-block: clamp(3rem, 8vw, 6rem);
}

.hero,
.panel {
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero {
  padding: clamp(2rem, 7vw, 5rem);
}

.panel {
  margin-top: 1.5rem;
  padding: clamp(1.5rem, 4vw, 2.5rem);
}

.eyebrow {
  margin: 0 0 0.5rem;
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2 {
  line-height: 1.2;
}

h1 {
  max-width: 18ch;
  margin: 0;
  font-size: clamp(2.4rem, 8vw, 5rem);
  letter-spacing: -0.04em;
}

h2 {
  margin-top: 2rem;
  font-size: 1.35rem;
}

.lede {
  max-width: 43rem;
  margin: 1.25rem 0 0;
  color: var(--muted);
  font-size: 1.2rem;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.facts li {
  border: 1px solid var(--border);
  border-radius: 0.9rem;
  padding: 1rem;
  background: rgb(0 107 94 / 5%);
}

.callout {
  border-left: 0.3rem solid var(--accent);
  padding-left: 1rem;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding-block: 1.5rem 3rem;
  color: var(--muted);
  font-size: 0.9rem;
}

@media (max-width: 46rem) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
  }

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

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

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0c151c;
    --surface: #13232b;
    --text: #f4f8fa;
    --muted: #b7c7cf;
    --accent: #62d8c6;
    --accent-strong: #91eadc;
    --border: #2e414a;
    --shadow: 0 18px 50px rgb(0 0 0 / 28%);
  }

  .site-header {
    background: rgb(12 21 28 / 90%);
  }
}