body {
  /*font-family: Avenir, Helvetica Neue, Helvetica, Arial;*/
  font-family: Arial,Helvetica,sans-serif;
  padding-left: 15px;
  background-color: #eee;
}

a {
  color: #000;
  text-decoration: none;
}

a:hover {
  color: #50C1FD;
}

#paper {
  max-width: 800px;
  display: block;
  margin-left: auto;
  margin-right: auto;
  padding: 80px 80px 50px 80px;
  background-color: #fff;
}

.heading {
  font-weight: 600;
  letter-spacing: 1px;
  margin-top: 25px;
  margin-bottom: 5px;
  font-size: 20px;
  color: gray;
}

.content .authors {
  font-size: 16px;
  margin-bottom: 10px;
  margin-top: 10px;
  text-align: center;
}

.content .figure {
  margin: 25px 0 25px 0;
}

.content .figure img {
  max-width: 800px;
}

.content .figure .caption {
  font-size: 14px;
  margin-top: 5px;
  text-align: justify;
}
.content .text {
  font-size: 16px;
  font-weight: 300;
  margin-bottom: 10px;
  text-align: justify;
}

.content .materials {
  font-size: 16px;
  font-weight: 300;
  margin-top: 30px;
  margin-bottom: 10px;
}

.content .title {
  font-size: 20px;
  font-weight: 600;
  text-align: center;
}

.content .player {
  margin-top: 5px;
}

.video {
  margin-top: 30px;
}