:root {
  color-scheme: light dark;
  --light: #fff;
  --dark: #000;
  --bg: var(--light);
  --fg: var(--dark);
  --muted: rgba(0, 0, 0, 0.72);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: var(--dark);
    --fg: var(--light);
    --muted: rgba(255, 255, 255, 0.78);
  }
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  background: var(--bg);
  color: var(--fg);
  font-family: "IBM Plex Mono", monospace;
  font-size: 16px;
  text-transform: uppercase;
}

body {
  min-height: 100vh;
  background: var(--bg);
  color: var(--fg);
}

body > div {
  width: min(960px, calc(100% - 3rem));
  margin: 0 auto;
  padding: 4rem 0;
  display: grid;
  gap: 3rem;
}

aside,
main {
  display: grid;
  gap: 1.5rem;
}

header {
  display: grid;
  gap: 0.2rem;
}

h1 {
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.6;
  letter-spacing: 0.08em;
}

p,
dd,
a,
dt {
  font-size: 1rem;
  line-height: 1.6;
  letter-spacing: 0.08em;
}

nav {
  display: grid;
  align-items: flex-start;
  gap: 0.2rem;
}

nav a {
  display: block;
}

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

a:hover,
a:focus-visible {
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

main {
  gap: 1.75rem;
}

dl {
  display: grid;
  gap: 0.2rem;
}

dt {
  font-weight: 500;
}

dd {
  color: var(--muted);
}

@media (min-width: 768px) {
  body > div {
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    align-items: start;
    gap: 4rem;
  }

  aside {
    position: sticky;
    top: 4rem;
    gap: 0.75rem;
  }
}