:root {
  --background: 220 20% 98%;
  --foreground: 222 47% 11%;
  --card: 0 0% 100%;
  --border: 214 32% 91%;
  --link: 221 83% 53%;
}
* {
  box-sizing: border-box;
}
body {
  margin: 0;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
  font:
    1.125rem/1.75 system-ui,
    sans-serif;
}
header,
main,
footer {
  max-width: 72rem;
  margin: auto;
  padding: 1.5rem;
}
header {
  font-weight: 750;
  border-bottom: 1px solid hsl(var(--border));
}
main {
  max-width: 52rem;
  min-height: 60vh;
  padding-top: 3rem;
  padding-bottom: 4rem;
}
h1 {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  line-height: 1.1;
  letter-spacing: -0.035em;
}
h2 {
  line-height: 1.3;
  margin-top: 2rem;
}
a {
  color: hsl(var(--link));
  text-underline-offset: 0.2em;
}
a:focus-visible {
  outline: 3px solid hsl(var(--link));
  outline-offset: 4px;
}
footer {
  border-top: 1px solid hsl(var(--border));
  font-size: 1rem;
}
footer nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}
pre,
table {
  max-width: 100%;
  overflow: auto;
}
blockquote {
  border-left: 3px solid hsl(var(--border));
  padding-left: 1rem;
}
article {
  overflow-wrap: anywhere;
}
@media (prefers-color-scheme: dark) {
  :root {
    --background: 224 71% 4%;
    --foreground: 213 31% 91%;
    --card: 224 71% 4%;
    --border: 216 34% 17%;
    --link: 216 100% 50%;
  }
}