html, body{
  font-family: Georgia, "Times New Roman", Times, serif; 
}
#side_panel{
  float: right;
  width: 240px;
  margin: 0 0 0 10px;
}

h1,h2,h4, .licence{
  text-align: center;
}

#main_content h3, h2{
  text-decoration: underline;
}
ul, li{
  padding: 0;
}

#options_lecture{
  padding: 0 0 0 15px;
}