.hidden {
  display: none;
}

.container {
  display: flex;
  justify-content: center;
}

.flex-around {
  display: flex;
  justify-content: space-around;
}

.reveal ul {
  list-style-type: square;
}

.reveal pre code {
  padding: 10px;
  max-height: 530px;
}

.float-left {
  float: left;
}

.float-right {
  float: right;
}

.attribution {
  font-size: 60%;
  font-style: italic;
  background: #eee;
}

table.borders td,
table.borders th {
  border: 2px solid black !important;
}

.no-border {
  background: none !important;
  border: none !important;
  box-shadow: none !important;
}

div.attribution {
  font-style: italic;
  font-size: 40%;
}

.note {
  font-style: italic;
  font-size: 80%;
}

div.footer {
  font-family: initial;
  z-index: 1;
  font-size: 16px;
  font-style: italic;
  position: absolute;
  bottom: 1em;
  text-align: center;
  background: #ddd;
  box-shadow: 5px 5px #888;
  border-radius: 5px;
  padding: 10px !important;
}