* {
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif;
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 20px 64px;
  color: #222;
  line-height: 1.8;
  background: #fff;
}

header {
  border-bottom: 1px solid #e5e5e5;
  padding-bottom: 16px;
  margin-bottom: 32px;
}

header h1 {
  font-size: 24px;
  margin: 0 0 4px;
}

header .updated {
  color: #888;
  font-size: 13px;
}

h2 {
  font-size: 18px;
  margin-top: 32px;
  padding-bottom: 6px;
  border-bottom: 1px solid #eee;
}

h3 {
  font-size: 15px;
  margin-top: 24px;
}

p, li {
  font-size: 15px;
}

ul, ol {
  padding-left: 1.5em;
}

a {
  color: #0a66c2;
  text-decoration: underline;
}

code {
  background: #f4f4f4;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
}

footer {
  border-top: 1px solid #e5e5e5;
  margin-top: 48px;
  padding-top: 16px;
  font-size: 13px;
  color: #888;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

footer nav a {
  margin-right: 12px;
}

.card-list {
  list-style: none;
  padding: 0;
}

.card-list li {
  border: 1px solid #e5e5e5;
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 12px;
}

.card-list a {
  font-weight: 600;
  text-decoration: none;
}

.card-list p {
  color: #666;
  margin: 4px 0 0;
  font-size: 14px;
}