:root {
  --ink: #0A2A66;
  --bg: #FFFFFF;
  --text: #1B1F24;
  --muted: #5B6470;
  --rule: #E3E7EE;
  --panel: #F4F6FA;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #8FB0F0;
    --bg: #0E1116;
    --text: #E8EBF0;
    --muted: #9AA3AF;
    --rule: #262C36;
    --panel: #161B23;
  }
}

* { 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, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

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

header.site .wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand {
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  font-size: 18px;
}

nav a {
  color: var(--muted);
  text-decoration: none;
  margin-right: 16px;
}

nav a:last-child { margin-right: 0; }
nav a[aria-current="page"] { color: var(--ink); font-weight: 600; }

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

main { padding-top: 32px; padding-bottom: 48px; }

h1 {
  color: var(--ink);
  font-size: 32px;
  line-height: 1.2;
  margin: 0 0 8px;
}

h2 {
  color: var(--ink);
  font-size: 21px;
  line-height: 1.3;
  margin: 36px 0 8px;
}

.updated { color: var(--muted); margin: 0 0 24px; font-size: 15px; }

.summary {
  background: var(--panel);
  border-left: 4px solid var(--ink);
  border-radius: 6px;
  padding: 14px 18px;
  margin: 0 0 8px;
}

.summary ul { margin: 0; padding-left: 20px; }

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

code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: var(--panel);
  padding: 1px 5px;
  border-radius: 4px;
  overflow-wrap: anywhere;
}

.placeholder {
  background: #FFF2B3;
  color: #3A3000;
  padding: 0 4px;
  border-radius: 3px;
}

footer {
  border-top: 1px solid var(--rule);
  color: var(--muted);
  font-size: 14px;
  padding-top: 16px;
  padding-bottom: 32px;
}

@media (max-width: 480px) {
  body { font-size: 16px; }
  h1 { font-size: 26px; }
  h2 { font-size: 19px; }
  main { padding-top: 24px; }
}