reveal.css

ul {
  display: block !important;
}
.reveal img {
  border: 0.5px !important;
  border-radius: 2px 10px 2px;
  padding: 4px;
}
.definition,.theorem,.activity {
  border-width: 0.5px;
  border-style: solid;
  border-radius: 2px 10px 2px;
  padding: 1%;
  margin-bottom: 2em;
}
.definition {
  background: #00608010;
}
.theorem {
  background: #ff000010;
}
.proof {
  background: #ffffff90;
}
.activity {
  background: #60800010;
}
dfn {
  font-weight: bold;
}
.ptx-content ol.no-marker,
.ptx-content ul.no-marker,
.ptx-content li.no-marker {
    list-style-type: none;
}

.ptx-content ol.decimal {
    list-style-type: decimal;
}
.ptx-content ol.lower-alpha {
    list-style-type: lower-alpha;
}
.ptx-content ol.upper-alpha {
    list-style-type: upper-alpha;
}
.ptx-content ol.lower-roman {
    list-style-type: lower-roman;
}
.ptx-content ol.upper-roman {
    list-style-type: upper-roman;
}
.ptx-content ul.disc {
    list-style-type: disc;
}
.ptx-content ul.square {
    list-style-type: square;
}
.ptx-content ul.circle {
    list-style-type: circle;
}
.ptx-content ol.no-marker,
.ptx-content ul.no-marker {
    list-style-type: none;
}
.ptx-content .cols1 li,
.ptx-content .cols2 li,
.ptx-content .cols3 li,
.ptx-content .cols4 li,
.ptx-content .cols5 li,
.ptx-content .cols6 li {
    float: left;
    padding-right:2em;
}