:root {
  color-scheme: light dark;
  --bg: #f7f8fa;
  --text: #17202a;
  --muted: #5b6673;
  --line: #d9dee5;
  --panel: #ffffff;
  --accent: #2563eb;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #101214;
    --text: #eef2f6;
    --muted: #aab4c0;
    --line: #2c333b;
    --panel: #171a1e;
    --accent: #6aa4ff;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.page {
  width: min(840px, calc(100% - 32px));
  margin: 0 auto;
  padding: 40px 0 56px;
}

header {
  margin-bottom: 28px;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 14px;
}

main {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 26px;
}

h1 {
  margin: 0;
  font-size: clamp(32px, 7vw, 52px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin: 30px 0 10px;
  font-size: 22px;
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin: 22px 0 8px;
  font-size: 18px;
  letter-spacing: 0;
}

p,
ul {
  margin: 10px 0;
}

ul {
  padding-left: 1.25rem;
}

a {
  color: var(--accent);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.16em;
}

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

.lang {
  border-top: 1px solid var(--line);
  margin-top: 30px;
  padding-top: 24px;
}

.footer {
  margin-top: 24px;
  color: var(--muted);
  font-size: 14px;
}

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.95em;
}