* {
  box-sizing: border-box;
}

:root {
  color-scheme: light;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: #17211e;
  background: #f5f8f7;
  line-height: 1.65;
}

body {
  margin: 0;
}

header,
main,
footer {
  width: min(100% - 2rem, 760px);
  margin-inline: auto;
}

header {
  padding-block: 2rem 1rem;
}

main {
  padding-block: 1rem 3rem;
}

footer {
  padding-block: 1.5rem 2.5rem;
  border-top: 1px solid #cbd7d2;
  color: #43534d;
  font-size: 0.925rem;
}

h1,
h2,
h3 {
  line-height: 1.2;
}

h1 {
  margin-bottom: 0.5rem;
  font-size: clamp(2rem, 7vw, 3rem);
}

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

a {
  color: #006f59;
  text-underline-offset: 0.16em;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1rem;
}

.card {
  padding: 1.25rem;
  border: 1px solid #d5e0db;
  border-radius: 1rem;
  background: #fff;
}

.muted {
  color: #43534d;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    color: #e5eeea;
    background: #101513;
  }

  footer {
    border-color: #34423c;
    color: #b8c8c1;
  }

  a {
    color: #4ce0b5;
  }

  .card {
    border-color: #34423c;
    background: #191f1c;
  }

  .muted {
    color: #b8c8c1;
  }
}