body {
  padding: 0px;
  margin: 0px;
}

h1, h2, h3 {
  margin-left: 1ex;
  margin-right: 1ex;
}

p {
  margin-left: 1ex;
  margin-right: 1ex;
}

div.talk {
  margin: 0px 0px 0em 0px;
  padding: 1em 0.5em 1em 0.5em;
  border-width: 0px 0px 1px 0px;
}

div.talk:last-child {
  border-width: 0px;
}

div.talk p.abstract {
  margin: 1em 0px 0px 0px;
}