:root {
  --bg: #fdfdfb;
  --fg: #222;
  --muted: #666;
  --rule: #ddd;
  --accent: #1f4e79;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #1b1c1e;
    --fg: #e4e4e2;
    --muted: #9a9a98;
    --rule: #3a3b3e;
    --accent: #8fb8de;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.6 Georgia, "Times New Roman", serif;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 3rem 1rem 2rem;
}

a { color: var(--accent); text-underline-offset: 2px; }

h1 { font-size: 2rem; font-weight: normal; margin: 0 0 .25rem; }
h2 {
  font-size: 1.15rem;
  font-weight: normal;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
  border-bottom: 1px solid var(--rule);
  padding-bottom: .3rem;
  margin: 2.5rem 0 1rem;
}

header p { margin: .2rem 0; }
.role { font-style: italic; }

nav {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: .4rem 1.25rem;
  font-family: system-ui, sans-serif;
  font-size: .9rem;
}

dl {
  display: grid;
  grid-template-columns: max-content 1fr;
  gap: .3rem 1.25rem;
  margin: 0;
}
dt { color: var(--muted); }
dd { margin: 0; }

.courses { list-style: none; padding: 0; }
.courses li { margin-bottom: .9rem; }
.courses span { display: block; color: var(--muted); font-size: .92rem; }

.muted { color: var(--muted); font-size: .92rem; }

footer {
  margin-top: 3rem;
  border-top: 1px solid var(--rule);
  font-size: .85rem;
  color: var(--muted);
}

@media (max-width: 30rem) {
  dl { grid-template-columns: 1fr; }
  dt { margin-top: .4rem; }
}

nav .lang {
  padding-right: 1.25rem;
  border-right: 1px solid var(--rule);
}