.container{
  display: flex;
  align-items: flex-start;
}
.col{
  flex: 1;
}
.spaced {
  padding: 10px
}
.stack{
  display: flex;
  align-items: center;
  flex-direction: column;
  flex: 1;
}
.row{
  flex: 1;
}
.current{
  color: #33B;
}
.purple{
  color: #A0F;
  background-color: #d9d2e9;
}
.yellow{
  color: black;
  background-color: #FF0;
}
.dark-orange{
  color: black;
  background-color:#FA0;
}
.orange{
  color: orange;
  background-color: rgb(252, 229, 205);
}
.brown {
  color: brown;
  background-color: rgb(255, 242, 204);
}
.dark-red{
  color: #980000;
  background-color: rgb(230, 184, 175);
}
.red{
  color:red;
  background-color: rgb(244, 204, 204);
}
.green{
  color:green;
  background-color: rgb(217, 234, 211);
}
.dark-green{
  color:black;
  background-color: green;
}
.cyan{
  color:black;
  background-color: cyan;
}
.light-blue{
  color:black;
  background-color: rgb(201, 218, 248)
}
.blue {
  color:blue;
  background-color: rgb(207, 226, 243);
}
.magenta {
  color:magenta;
  background-color: rgb(234, 209, 220);
}
.tinyhex{
  font-size: 16px;
  word-break: break-all;
  text-align: left;
}
.smallhex{
  font-size: 20px;
  word-break: break-all;
  text-align: left;
}
.medhex{
  font-size: 24px;
  word-break: break-all;
  text-align: left;
}
.largehex{
  font-size: 30px;
  word-break: break-all;
  text-align: left;
}
.largerhex{
  font-size: 36px;
  word-break: break-all;
  text-align: left;
}
.bighex{
  word-break: break-all;
  text-align: left;
}
.elem{
  font-family: monospace;
  font-weight: bold;
  display: inline flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  height: 30px;
  width: 150px;
  font-size: 16px;
  vertical-align: text-bottom;
  border: 1px solid black;
  background-color: #CCC;
}
.op{
  font-family: monospace;
  font-weight: bold;
  display: inline flex;
  align-items: center;
  justify-content: center;
  padding: 10px;
  height: 30px;
  width: 150px;
  font-size: 16px;
  vertical-align: text-bottom;
  border: 1px solid black;
  background-color: white;
}
div{
  text-align: left;
}
.videocontainer {
  position: relative;
  width: 100%;
  height: 0;
  padding-bottom: 56.25%;
}
.video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.tree ul {
    padding-top: 20px; position: relative;

    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}
.tree li {
    float: left; text-align: center;
    list-style-type: none;
    position: relative;
    padding: 12px 0px 0 0;

    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}

.tree li::before, .tree li::after{
    content: '';
    position: absolute; top: 0; right: 50%;
    border-top: 1px solid #888;
    width: 50%; height: 20px;
}
.tree li::after{
    right: auto; left: 50%;
    border-left: 1px solid #888;
}

.tree li:only-child::after, .tree li:only-child::before {
    display: none;
}

.tree li:only-child{ padding-top: 0;}

.tree li:first-child::before, .tree li:last-child::after{
    border: 0 none;
}
.tree li:last-child::before{
    border-right: 1px solid #888;
    border-radius: 0 5px 0 0;
    -webkit-border-radius: 0 5px 0 0;
    -moz-border-radius: 0 5px 0 0;
}
.tree li:first-child::after{
    border-radius: 5px 0 0 0;
    -webkit-border-radius: 5px 0 0 0;
    -moz-border-radius: 5px 0 0 0;
}
.tree ul ul::before{
    content: '';
    position: absolute; top: 0; left: 50%;
    border-left: 1px solid #888;
    width: 0; height: 20px;
}
.tree li div{
    border: 1px solid #888;
    padding: 5px 10px;
    text-decoration: none;
    color: #666;
    font-size: 26px;
    display: inline-block;
    border-radius: 5px;
    -webkit-border-radius: 5px;
    -moz-border-radius: 5px;

    transition: all 0.5s;
    -webkit-transition: all 0.5s;
    -moz-transition: all 0.5s;
}