html {
  box-sizing: border-box;
}

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

html,
body {
  margin: 0;
  padding: 0;
  background: #fff;
  color: #212121;
  font-family: Arial, Helvetica, sans-serif;
  font-size: 14.67px;
  line-height: 1.656;
}

a {
  color: #006580;
}

.back {
  display: inline-block;
  margin: 12px 16px 0;
  color: #006580;
  font-size: 14px;
  text-decoration: none;
}

.banner {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 280px;
  margin-top: 8px;
  padding: 28px 24px;
  background-color: #226e93;
  background-image: url("../assets/img/sites-header.png");
  background-position: center top;
  background-size: cover;
}

.banner h1 {
  margin: 0;
  max-width: 16em;
  color: #000;
  font-size: 48px;
  font-weight: 400;
  line-height: 1.15;
  text-align: center;
}

main {
  padding: 28px 24px 72px;
}

p {
  margin: 0 0 16px;
}

h2,
h3 {
  margin: 18px 0 6px;
  color: #000;
  font-weight: 700;
  line-height: 1.656;
}

h2 {
  font-size: 22.67px;
}

h3 {
  margin-bottom: 5px;
  font-size: 17.33px;
}

strong {
  font-weight: 700;
}

.name {
  color: #0842a0;
}

.callout {
  position: relative;
  padding-left: 36px;
  font-weight: 700;
}

.callout svg {
  position: absolute;
  top: 0.1em;
  left: 0;
  width: 24px;
  height: 24px;
  fill: #393939;
}

ul {
  margin: 6px 0 16px;
  padding-left: 1.5em;
  list-style: square;
}

li {
  margin: 0 0 12px;
}

li strong {
  font-weight: 700;
}

.sdk p {
  margin-bottom: 10px;
}

.sdk .sdk-name {
  margin-top: 18px;
}

@media (min-width: 960px) {
  .back {
    margin-left: 71px;
  }

  .banner {
    min-height: 340px;
  }

  .banner h1 {
    font-size: 64px;
  }

  main {
    padding: 36px 71px 96px;
  }
}