body {
  font-family: verdana, helvetica, sans-serif;
  font-size: 16px;
  color: black;
  background-color: #ffffff;
}

div.container {
  max-width: 64rem;
  float: center;
  margin: auto;
  padding: 0.5rem 0.5rem;
  background-color: #fffafa;
}

nav {
  display: inline-block;
  width: 100%;
}

div.header {
  background-color: #f0f0ff;
  max-width: 100%;
  padding: 0.5rem;
}

footer, article, main {
  display: block;
}


ul.menubar {
  list-style-type: none;
  padding-left: 0;
  text-align: left;
}

ul.menubar li {
  float: left;
  padding-right: 2rem;
  padding-left: 0;
  list-style-type: none;
  font-weight: bold;
  font-size: 120%;
}

ul.menubar li a {
  color: blue;
}

ul.menubar li a.highlight {
  color: red;
}

h1 {
  font-size: 150%;
  font-weight: bold;
  margin: 0;
}

h2 {
  font-size: 130%;
  font-weight: bold;
  text-decoration: underline;
}

p.subtitle {
  font-size: 125%;
} 

table {
  background-color: #fffafa;
  border-collapse: collapse; 
  width: 100%;
  table-layout: auto;
}

th {
  text-align: left;
  padding-right: 0.5rem;
}

tr {
  border-bottom: solid 1px gray;
}

tr.invited {
  border-bottom: none;
}

tr.abstract {
  font-size: 85%;
}

tr.empty {
  border-bottom: none;
}

tr.break {
  border-bottom: none;
}

tr.mybold {
  border-bottom: none;
  font-size: 100%;
  font-weight: bold;
  white-space: nowrap;
}

tr.session {
  border-top: solid 4px black;
  font-size: 115%;
  font-weight: bold;
  white-space: nowrap;
}

tr.lastofsession {
  border-bottom: solid 4px black;
}

td {
  text-align: left;
  padding: 0.3rem;
  padding-right: 0.5rem;
}





@media screen and (max-width: 720px) {
  div.container {
    max-width: 100%;
  }
  div.header-left, div.header-center, div.header-right {
    display: inline-block;
  }
  ul.menubar li {
    float: initial;
    padding: 0.2rem;
  }

  body {
    font-size: 14px;
  }

  tr.invited {
    border-bottom: solid 1px gray;
  }

  tr.abstract {
    display: none;
  }

  tr.session {
    font-size: 100%;
  }
}