* {
  margin: 0;
  padding: 0;
}
:root {
  background-color: #eee;
  font-family: sans-serif;
  padding-top: 2rem;
  line-height: 1.25em;
}
.wrapper {
  max-width: 40ch;
  margin: 0 auto;
  padding: 2rem;
  background-color: #fff;
  box-shadow: 0 20px 15px -10px rgba(0,0,0,0.25);
}
h1  {
  margin-bottom: 2rem;
  line-height: 1.25em;
}
h2 {
  margin-bottom: 1rem;
}
h3 {
  margin: 2rem 0 1rem 0;
}
p {
  margin-bottom: 0.5rem;
}
summary {
  margin: 2rem 0;
  font-weight: bold;
  text-transform: uppercase;
}
dt {
  font-weight: bold;
  margin: 1rem 0 0.5rem 0;
}
dd {
  padding-left: 1rem;
}