body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  max-width: 720px;
  margin: 40px auto;
  padding: 0 20px;
  line-height: 1.6;
}

header {
  margin-bottom: 40px;
}

.avatar {
  width: 140px;
  height: 140px;
  border-radius: 50%;
  object-fit: cover;
  display: block;
  margin-bottom: 16px;
}