:root {
  --accent: #355C7D;
  --text: #1c1c1e;
  --muted: #5a5a60;
  --bg: #ffffff;
  --line: #e3e3e8;
  --panel: #f5f6f8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --accent: #8FB3D1;
    --text: #f2f2f7;
    --muted: #a8a8b0;
    --bg: #121214;
    --line: #2c2c30;
    --panel: #1c1c1f;
  }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.6 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
}

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

.wrap { max-width: 720px; margin: 0 auto; padding: 0 20px; }

header.site {
  border-bottom: 1px solid var(--line);
}

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 20px;
  padding-top: 18px;
  padding-bottom: 14px;
}

.brand {
  font-weight: 700;
  font-size: 20px;
  letter-spacing: 0.01em;
  color: var(--text);
  text-decoration: none;
}

nav a {
  margin-right: 14px;
  font-size: 15px;
  text-decoration: none;
}

nav a:last-child { margin-right: 0; }

main { padding: 28px 0 40px; }

h1 { font-size: 30px; line-height: 1.2; margin: 0 0 6px; }
h2 { font-size: 21px; margin: 32px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 6px; }

.updated { color: var(--muted); font-size: 15px; margin: 0 0 22px; }

.note {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 14px 16px;
  margin: 18px 0;
}

.note p:first-child { margin-top: 0; }
.note p:last-child { margin-bottom: 0; }

ul { padding-left: 22px; }
li { margin: 4px 0; }

table { width: 100%; border-collapse: collapse; margin: 12px 0; font-size: 15px; }
th, td { text-align: left; vertical-align: top; padding: 8px 10px; border-bottom: 1px solid var(--line); }
th { font-weight: 600; }

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

footer.site .wrap { padding-top: 16px; padding-bottom: 28px; }
footer.site a { margin-right: 12px; }