body {
  background-color: #f5f7fa;
  color: #2e2e2e;
  font-family: Georgia, serif;
  margin: 0;
  min-height: 100vh;
  padding: 0;
}
p {
  line-height: 1.5;
}
img {
  box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
}
summary {
  cursor: pointer;
}

hr {
  /* Reset the border of the <hr> separator, then set a better line */
  border: 0;
  border-bottom: 1px solid #b4b4b4;
  margin: 1rem auto;
}