:root {
  --bg: #f7f6f3;
  --text: #1c1814;
  --dim: #5c5448;
  --line: rgba(0, 0, 0, 0.1);
  --accent: #4f46e5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0e;
    --text: #f2f2f4;
    --dim: #aeaeb6;
    --line: rgba(255, 255, 255, 0.12);
    --accent: #a5b4fc;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Hiragino Sans", "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 40px 20px 80px;
}

header.site {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

header.site a.brand {
  color: var(--text);
  font-weight: 700;
  font-size: 20px;
  text-decoration: none;
}

nav.lang {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  font-size: 14px;
}

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

section {
  border-top: 1px solid var(--line);
  margin-top: 40px;
  padding-top: 8px;
}

h1 { font-size: 28px; line-height: 1.25; margin: 24px 0 4px; }
h2 { font-size: 18px; margin: 28px 0 6px; }
p, li { color: var(--text); }
.meta { color: var(--dim); font-size: 14px; margin: 0 0 16px; }
ul { padding-left: 20px; }
li { margin: 6px 0; }
.summary {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px 16px;
}
footer {
  margin-top: 56px;
  color: var(--dim);
  font-size: 14px;
}