:root {
  --bg: #ffffff;
  --bg-soft: #f6f7f9;
  --fg: #14181f;
  --fg-muted: #4b5563;
  --border: #d2d7de;
  --border-strong: #b7bec8;
  --accent: #14418f;
  --accent-soft: #eaf0fb;
  --radius: 10px;
  --max: 820px;
}

* { box-sizing: border-box; }

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.65;
}

a { color: var(--accent); text-decoration: underline; text-underline-offset: 2px; }
a:hover { text-decoration-thickness: 2px; }

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

.site-header .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 14px 20px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: .02em;
  color: var(--fg);
  text-decoration: none;
}

.brand span {
  font-weight: 500;
  color: var(--fg-muted);
  font-size: .9rem;
  margin-left: 6px;
}

.nav {
  margin-left: auto;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-size: .92rem;
}

.nav a { color: var(--fg-muted); text-decoration: none; padding: 4px 0; }
.nav a:hover, .nav a[aria-current="page"] { color: var(--accent); text-decoration: underline; }

main {
  max-width: var(--max);
  margin: 0 auto;
  padding: 34px 20px 56px;
}

h1 {
  font-size: clamp(1.6rem, 1.15rem + 1.4vw, 2.05rem);
  line-height: 1.25;
  margin: 0 0 6px;
  letter-spacing: -.01em;
}

.updated {
  margin: 0 0 26px;
  color: var(--fg-muted);
  font-size: .88rem;
}

h2 {
  font-size: 1.02rem;
  margin: 30px 0 8px;
  padding-top: 18px;
  border-top: 1px solid var(--border);
  letter-spacing: .01em;
}

h2:first-of-type { border-top: 0; padding-top: 0; margin-top: 22px; }

h3 { font-size: .97rem; margin: 18px 0 6px; }

p, li { color: var(--fg); }
p { margin: 0 0 12px; }
ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }

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

.card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  background: var(--bg-soft);
  margin: 16px 0;
}

.card p:last-child, .card ul:last-child { margin-bottom: 0; }

table { width: 100%; border-collapse: collapse; margin: 8px 0 18px; font-size: .93rem; }
th, td { text-align: left; padding: 9px 10px; border: 1px solid var(--border); vertical-align: top; }
th { background: var(--bg-soft); font-weight: 600; }

.pages {
  list-style: none;
  padding: 0;
  margin: 22px 0 0;
  display: grid;
  gap: 12px;
}

.pages li { margin: 0; }

.pages a {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  text-decoration: none;
  color: var(--fg);
}

.pages a:hover { border-color: var(--border-strong); background: var(--accent-soft); }
.pages strong { display: block; color: var(--accent); font-size: 1rem; margin-bottom: 2px; }
.pages span { color: var(--fg-muted); font-size: .9rem; }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
}

.site-footer .inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 20px;
  font-size: .85rem;
  color: var(--fg-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

.site-footer a { color: var(--fg-muted); }

@media (max-width: 540px) {
  .site-header .inner { padding: 12px 16px; }
  .nav { margin-left: 0; width: 100%; gap: 4px 14px; }
  main { padding: 26px 16px 44px; }
  table, th, td { font-size: .88rem; }
}