:root {
  --primary: #1f5f8b;
  --primary-tint: #e4ecf1;
  --bg: #f2f5f8;
  --surface: #ffffff;
  --line: #e6ebf0;
  --text: #16222c;
  --muted: #5d6b78;
  --radius: 18px;
  --font: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

header.site {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

header.site .wrap {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 11px;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-name {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -0.3px;
}

nav.site {
  margin-left: auto;
  display: flex;
  gap: 18px;
}

nav.site a {
  color: var(--muted);
  text-decoration: none;
  font-size: 13.5px;
  font-weight: 600;
}

nav.site a:hover { color: var(--primary); }

main { padding: 48px 0 80px; }

h1 {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.6px;
  margin: 0 0 8px;
}

h2 {
  font-size: 19px;
  font-weight: 800;
  margin: 36px 0 10px;
  letter-spacing: -0.2px;
}

p { color: var(--text); font-size: 15px; }

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

.updated {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 28px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 28px 30px;
}

ul { padding-left: 20px; }
li { margin-bottom: 6px; font-size: 15px; }

a.link { color: var(--primary); font-weight: 700; text-decoration: none; }
a.link:hover { text-decoration: underline; }

footer.site {
  border-top: 1px solid var(--line);
  padding: 24px 0;
  color: var(--muted);
  font-size: 12.5px;
}

footer.site .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: space-between;
}

footer.site nav { display: flex; gap: 16px; }
footer.site nav a { color: var(--muted); text-decoration: none; font-weight: 600; }
footer.site nav a:hover { color: var(--primary); }

.hero {
  text-align: center;
  padding: 60px 0 20px;
}

.hero .brand-mark {
  width: 76px;
  height: 76px;
  border-radius: 22px;
  margin: 0 auto 22px;
  box-shadow: 0 12px 30px -10px rgba(29, 90, 132, 0.5);
}

.hero h1 { font-size: 34px; }
.hero p.tag { font-size: 16px; color: var(--muted); max-width: 440px; margin: 12px auto 0; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-tint);
  color: var(--primary);
  font-size: 12.5px;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: 999px;
  margin-top: 22px;
}