*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  color: #202124;
  background: #ffffff;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  line-height: 1.7;
}

body {
  margin: 0;
  padding: 40px 18px 64px;
}

main {
  width: min(100%, 880px);
  margin: 0 auto;
}

header {
  margin-bottom: 32px;
}

h1,
h2 {
  line-height: 1.35;
}

h1 {
  margin: 0 0 12px;
  font-size: 2rem;
}

h2 {
  margin: 36px 0 12px;
  font-size: 1.3rem;
}

p {
  margin: 12px 0;
}

ul {
  padding-left: 1.25rem;
}

li {
  margin: 8px 0;
}

a {
  color: #1457a8;
}

.muted {
  color: #5f6368;
}

.list {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
  padding: 0;
  list-style: none;
}

.item {
  border: 1px solid #dadce0;
  border-radius: 8px;
  padding: 18px;
}

.item h2 {
  margin-top: 0;
}

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 12px;
}

@media (max-width: 640px) {
  body {
    padding-top: 28px;
  }

  h1 {
    font-size: 1.65rem;
  }
}