:root {
  color-scheme: light;
  --bg: #f3f4f8;
  --fg: #20232b;
  --link: #244f83;
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #1c1f26;
  --fg: #f1f2f6;
  --link: #afcef5;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0 auto;
  padding: 1.5rem;
  max-width: 72rem;
  background: var(--bg);
  color: var(--fg);
  font:
    1rem/1.65 system-ui,
    sans-serif;
}
a {
  color: var(--link);
  text-underline-offset: 0.2em;
}
a:focus-visible {
  outline: 3px solid currentColor;
  outline-offset: 4px;
}
header {
  border-bottom: 1px solid;
  padding-bottom: 1rem;
}
header img {
  display: block;
  max-width: 100%;
  height: auto;
  object-fit: contain;
}
header nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  margin-top: 1rem;
}
main {
  max-width: 48rem;
  padding: 2rem 0;
}
h1 {
  font-size: clamp(1.8rem, 5vw, 2.7rem);
  line-height: 1.2;
}
h2 {
  margin-top: 2rem;
  line-height: 1.3;
}
footer {
  border-top: 1px solid;
  padding-top: 1rem;
}
.skip-link {
  position: absolute;
  top: -100px;
}
.skip-link:focus {
  top: 0;
  background: var(--bg);
  padding: 0.5rem;
}

select {
  min-height: 44px;
  font: inherit;
  margin-top: 1rem;
}