* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #fff;
  color: #222;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

main {
  width: min(100% - 40px, 640px);
  margin: 0 auto;
  padding: 80px 0;
}

header {
  margin-bottom: 36px;
}

h1 {
  margin: 0;
  font-size: 28px;
  line-height: 1.3;
}

.subtitle {
  margin: 4px 0 0;
  color: #666;
}

section {
  margin-top: 36px;
}

h2 {
  margin: 0 0 8px;
  font-size: 16px;
}

p {
  margin: 0;
}

a {
  color: #2457a7;
  text-underline-offset: 3px;
}

a:hover {
  color: #173c78;
}

span {
  margin: 0 6px;
  color: #999;
}

@media (max-width: 480px) {
  main {
    padding: 48px 0;
  }
}