:root {
  color-scheme: light dark;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
  --background: #f6f7f9;
  --surface: #ffffff;
  --text: #1d1d1f;
  --secondary: #5f6368;
  --accent: #246bfd;
  --border: #dfe3e8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #111214;
    --surface: #1c1d20;
    --text: #f5f5f7;
    --secondary: #b4b7bd;
    --accent: #78a7ff;
    --border: #34363b;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
}

main {
  width: min(860px, calc(100% - 32px));
  margin: 40px auto;
  padding: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 20px;
}

header {
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

h1 {
  margin: 0 0 8px;
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  line-height: 1.2;
}

h2 {
  margin-top: 36px;
  font-size: 1.35rem;
  line-height: 1.35;
}

p,
li {
  max-width: 75ch;
}

.meta,
.note {
  color: var(--secondary);
}

.language-link {
  display: inline-block;
  margin-top: 12px;
}

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

footer {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--secondary);
}

@media (max-width: 600px) {
  main {
    width: 100%;
    margin: 0;
    padding: 24px 20px 40px;
    border: 0;
    border-radius: 0;
  }
}