:root {
  font-family: system-ui, sans-serif;
  color: #172333;
  background: #f3f6fa
}

body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column
}

header,
footer {
  padding: 1.2rem 5%;
  background: #fff
}

header {
  padding: .7rem 5%;
  border-bottom: 1px solid #d9e2ec;
  position: sticky;
  top: 0;
  z-index: 10
}

a.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: -.01em;
  color: #172333;
  text-decoration: none
}

a.brand:focus-visible {
  outline: 3px solid #2459a6;
  outline-offset: 3px;
  border-radius: 6px
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  margin: 0 auto;
  padding: 0
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: .4rem 1.5rem;
  border-top: 1px solid #d9e2ec;
  font-size: .85rem;
  color: #576779
}

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

footer a:hover,
footer a:focus-visible {
  color: #2459a6;
  text-decoration: underline
}

a {
  color: #2459a6
}

@media(prefers-color-scheme:dark) {
  :root {
    color: #e8eef6;
    background: #121b28
  }

  header,
  footer {
    background: #1b2738
  }

  header {
    border-bottom-color: #2f3f55
  }

  footer {
    border-top-color: #2f3f55;
    color: #a8b6c7
  }

  footer a:hover,
  footer a:focus-visible {
    color: #7fb0f0
  }

  a.brand {
    color: #e8eef6
  }

  a {
    color: #7fb0f0
  }

}