.hidden {
  display: none;
}

pre {
  width: 100%;
  height: 360px;
  overflow: scroll;
}

section {
  width: 100%;
  /*max-width: 920px;*/
  height: 690px;
  position: relative;
  border: 1px solid #333;
  background-color: #efefef;
  text-align: center;
  border-radius: 10px;
  box-shadow: 1px 1px 3px #aaa;
  overflow: hidden;
  /*transform: scale(0.85);*/
}

section div.block {
  position: absolute;
  top: 0px;
  left: 0px;
  width: 100%;
}

section div.content {
  display: flex;
  flex-direction: column;
  /*
	justify-content: center;
	align-items: flex-end;
	*/
}

section div.v-up {
  justify-content: flex-start;
}
section div.v-mid {
  justify-content: center;
}
section div.v-down {
  justify-content: flex-end;
}

section div.h-left {
  align-items: flex-start;
  text-align: left;
}
section div.h-mid {
  align-items: center;
  text-align: center;
}
section div.h-right {
  align-items: flex-end;
  text-align: right;
}

section div.up-left {
  justify-content: flex-start;
  align-items: flex-start;
  text-align: left;
}
section div.up-center {
  justify-content: flex-start;
  align-items: center;
}
section div.up-right {
  justify-content: flex-start;
  align-items: flex-end;
}
section div.center-left {
  justify-content: center;
  align-items: flex-start;
  text-align: left;
}
section div.center-center {
  justify-content: center;
  align-items: center;
}
section div.center-right {
  justify-content: center;
  align-items: flex-end;
}
section div.down-left {
  justify-content: flex-end;
  align-items: flex-start;
  text-align: left;
}
section div.down-center {
  justify-content: flex-end;
  align-items: center;
}
section div.down-right {
  justify-content: flex-end;
  align-items: flex-end;
}

section span.text-block {
  /* display: inline-block; */
}

li.slide {
  margin: 10px 0px;
  font-size: 18px;
}

div.footer {
  text-align: center;
}

section table {
  position: absolute;
}

section table,
section th,
section td {
  border: 1px solid black;
}

section svg.drawing {
  position: absolute;
  overflow: visible;
}

.fileUpload {
  position: relative;
  overflow: hidden;
}
.fileUpload input.upload {
  position: absolute;
  top: 0;
  right: 0;
  margin: 0;
  padding: 0;
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  filter: alpha(opacity=0);
}

#pptx-thumb {
  min-width: 240px;
  height: 180px;
}