:root {
  color-scheme: light dark;
  --bg: #f5f5f2;
  --panel: #fbfbf9;
  --text: #111111;
  --muted: #575757;
  --border: #d4d4cf;
  --link: #004d40;
  --link-hover: #00695c;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #191c1d;
    --panel: #212527;
    --text: #e6e8e7;
    --muted: #b5bcba;
    --border: #3b4341;
    --link: #79c8b6;
    --link-hover: #9de3d3;
  }
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: "IBM Plex Mono", "Cascadia Mono", "Liberation Mono", "Menlo", "Consolas", monospace;
  line-height: 1.55;
}

.page {
  max-width: 960px;
  margin: 48px auto;
  padding: 28px 30px;
  background: var(--panel);
  border: 1px solid var(--border);
}

header,
section,
footer {
  margin-bottom: 28px;
}

h1,
h2 {
  margin: 0 0 12px;
  line-height: 1.2;
}

h1 {
  font-size: 2rem;
  font-weight: 600;
}

h2 {
  font-size: 1.05rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

p,
ul {
  margin: 0;
}

ul {
  margin-top: 10px;
  padding-left: 20px;
}

li + li {
  margin-top: 8px;
}

.subtitle {
  color: var(--muted);
  margin-bottom: 8px;
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

a:hover,
a:focus-visible {
  color: var(--link-hover);
}

a:focus-visible {
  outline: 1px solid var(--link-hover);
  outline-offset: 2px;
}

@media (max-width: 720px) {
  .page {
    margin: 16px;
    padding: 20px;
  }
}