HTML, BODY {
  margin: 0;
  height: 100%;
  overflow: hidden;
  position: relative;
  background: #eee;
  cursor: none;
}
#slides {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
}

.slide {
  display: none;
  padding-left: 2em;
  padding-right: 2em;
  font-size: 2.7vw;
}

.step {
  opacity: 0;
  transition: opacity 0.2s;
}
.shown {
  opacity: 1 !important;
  transition: opacity 0.2s;
}

H1 {
  margin-top: 0;
  font-size: 120%;
}

PRE {
  font-size: 80%;
  padding: 0.5em;
  border: 1px solid #ddd;
  border-radius: 0.7em;
}

TH {
  white-space: nowrap;
  padding-right: 1em;
  vertical-align: top;
  font-family: monospace;
  font-weight: bold;
}

TD {
  padding-bottom: 0.5em;
}

.norm {
  font-weight: normal;
}

.centre_outer {
  display: table;
  width: 100%; height: 100%;
  position: absolute;
  top: 0; left: 0;
}
.centre_middle {
  display: table-cell;
  text-align: center;
  vertical-align: middle;
}
.centre_inner {
  display: inline-block;
  vertical-align: top;
  text-align: left;
  position: relative;
}

#debug {
  font-size: 1.4vw;
  display: inline-block;
  position: absolute;
  bottom: 0.5em;
  right: 0.5em;
  opacity: 0.5;
}
