:root {
  color-scheme: light dark;
  --background: #f7f9f9;
  --surface: #ffffff;
  --text: #1a1c1d;
  --muted: #55605f;
  --accent: #1a6d7f;
  --line: #d9e1e2;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #101415;
    --surface: #181d1e;
    --text: #e2e6e7;
    --muted: #a3b0b1;
    --accent: #7fd0e3;
    --line: #2c3536;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font: 17px/1.6 Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  overflow-wrap: anywhere;
}

header,
main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 16px;
}

header {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding-top: 20px;
  padding-bottom: 20px;
}

.brand {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  color: var(--text);
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

main {
  padding-bottom: 64px;
}

a {
  color: var(--accent);
}

h1 {
  font-size: 2rem;
  line-height: 1.2;
  margin: 16px 0;
}

h2 {
  font-size: 1.25rem;
  margin: 32px 0 8px;
}

.updated,
.summary {
  color: var(--muted);
}

nav {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 4px 20px;
}

nav h2 {
  font-size: 1rem;
  margin: 12px 0 4px;
}

ul {
  padding-left: 1.2rem;
}

li + li {
  margin-top: 6px;
}

section[lang] + section[lang] {
  border-top: 1px solid var(--line);
  margin-top: 32px;
  padding-top: 16px;
}