:root {
  color-scheme: light dark;
  font:
    16px/1.65 system-ui,
    sans-serif;
}
body {
  max-width: 880px;
  margin: 0 auto;
  padding: 0 1.2rem 4rem;
  color: #172c31;
  background: #f7faf9;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  border-bottom: 1px solid #adc0c1;
}
.brand {
  font-size: 1.3rem;
  font-weight: 750;
}
a {
  color: #175d59;
  text-underline-offset: 0.18em;
}
a:hover {
  color: #0c3d3b;
}
button {
  font: inherit;
  padding: 0.35rem 0.7rem;
  border: 1px solid #637e80;
  border-radius: 0.35rem;
  background: transparent;
  color: inherit;
  cursor: pointer;
}
button[aria-pressed='true'] {
  background: #175d59;
  border-color: #175d59;
  color: white;
}
button:focus-visible,
a:focus-visible {
  outline: 3px solid #c15916;
  outline-offset: 3px;
}
nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid #adc0c1;
}
h1 {
  line-height: 1.2;
  font-size: clamp(1.8rem, 4vw, 2.6rem);
}
h2 {
  line-height: 1.3;
  font-size: 1.5rem;
}
section {
  padding: 1rem 1rem 1.5rem;
  border-bottom: 1px solid #c9d5d5;
  scroll-margin-top: 1rem;
}
dt {
  font-weight: 700;
  margin-top: 0.8rem;
}
dd {
  margin-left: 0;
}
[hidden] {
  display: none !important;
}
.skip {
  position: absolute;
  transform: translateY(-150%);
  background: white;
  padding: 0.5rem;
}
.skip:focus {
  transform: translateY(0);
}
@media (prefers-color-scheme: dark) {
  body {
    color: #e6f1ef;
    background: #102426;
  }
  a {
    color: #91d4cd;
  }
  a:hover {
    color: #c3eeea;
  }
  header,
  nav,
  section {
    border-color: #435e5e;
  }
  button[aria-pressed='true'] {
    background: #91d4cd;
    border-color: #91d4cd;
    color: #102426;
  }
}