body {
    font-family: Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: #333;
    max-width: 65em;
    text-align: justify;
}

h2, h3, h4 {
  font-weight: bold;
  margin-top: 1em;
}

h2 {
  font-size: 2em;
}

h3 {
  font-size: 1.5em;
}

h4 {
  font-size: 1.2em;
}

ul {
  margin-top: 0;
  margin-bottom: 1em;
}

.paper {
  text-decoration: none;
}

.paper:hover {
  text-decoration: underline;
}