:root {
  --ink: #1d1d1f;
  --secondary: #6e6e73;
  --hairline: #d2d2d7;
  --accent: #0066cc;
  --paper: #ffffff;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC",
    "Hiragino Sans GB", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.wrap {
  max-width: 700px;
  margin: 0 auto;
  padding: 48px 24px 96px;
}

header.site {
  padding-top: 24px;
  margin-bottom: 56px;
}

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

.brand .mark { font-size: 22px; }

.brand .name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.6px;
}

.brand .en {
  font-size: 14px;
  color: var(--secondary);
  font-weight: 400;
}

h1 {
  font-size: 34px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin-bottom: 8px;
}

.updated {
  color: var(--secondary);
  font-size: 14px;
  margin-bottom: 40px;
}

h2 {
  font-size: 21px;
  font-weight: 600;
  margin: 44px 0 12px;
  letter-spacing: -0.2px;
}

h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 28px 0 8px;
}

p, li { font-size: 16px; color: var(--ink); }

p { margin-bottom: 14px; }

ul, ol { padding-left: 22px; margin-bottom: 14px; }

li { margin-bottom: 6px; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.summary {
  background: #f5f5f7;
  border-radius: 14px;
  padding: 20px 22px;
  margin: 24px 0 8px;
}

.summary p { margin-bottom: 6px; }
.summary p:last-child { margin-bottom: 0; }

footer.site {
  margin-top: 88px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  color: var(--secondary);
  font-size: 13px;
}

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

nav.pages {
  display: flex;
  gap: 20px;
  margin-top: 14px;
  font-size: 14px;
}

.card-list { list-style: none; padding: 0; margin-top: 32px; }

.card-list li {
  border: 1px solid var(--hairline);
  border-radius: 14px;
  margin-bottom: 16px;
}

.card-list a {
  display: block;
  padding: 22px 24px;
  color: var(--ink);
}

.card-list a:hover { text-decoration: none; background: #f5f5f7; border-radius: 14px; }

.card-list .title { font-size: 18px; font-weight: 600; }

.card-list .sub { font-size: 14px; color: var(--secondary); margin-top: 2px; }