body {
  background-color: #f0f0f0;
  margin: 0;
  font-family: 'Roboto', sans-serif;
}

main {
  max-width: 840px;
  margin: auto;
  background-color: white;
}

article {
  max-width: 820px;
  margin: auto;
  padding: 10px;
  box-sizing: border-box;
}

h1 {
  font-size: 20px;
}

h2 {
  font-size: 16px;
}

hr {
  border: none;
  border-bottom: 1px solid #e0e0e0;
  margin: 20px 0;
}

.paper-list {
  padding-left: 25px;
}

.paper-list > li {
  list-style-type: disc;
  padding-left: 10px;
}

.paper-list > li:not(:last-child) {
  margin-bottom: 25px;
}

.paper-list > li > p {
  margin: 5px 0;
}