crystal.css

body {
    background: #424242;
    padding: 0;
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    overflow-x: hidden;
}

#navigation {
    position: relative;
    top: 20px;
    color: #414141;
    background: #A6A6A6;
    width: 964px;
    height: 40px;
    margin: auto;
    border: 2px solid #414141;
    z-index: 2;
}

#navigation p {
    position: relative;
    left: 10px;
    padding: 0;
    margin-top: 10px;
    font-weight: bold;
    font-size: 20px;
    text-align: center;
}

a:visited { text-decoration: none; color:#414141;}
#grbr:hover, #grbr:active { text-decoration: underline; color:white;}

#graphics:hover, #graphics:active { text-decoration: underline; color:green;}


#container {
    width: 960px;
    height: 840px;
    margin: auto;
    margin-top: 26px;
    border: 0.1em solid #A6A6A6;
    border-radius: 0.5em;
    background: #585858;
    position: relative;
}

#instructions {
    margin: auto;
    position: relative;
    top: 20px;
    width: 100px;
    height: 40px;
}

#cells {
    position: relative;
    z-index: 15;
}

#expansionSliderContainer {
  position: absolute;
  bottom: 0;
  right: calc(50% - 10em);
  margin-bottom: 0.75em;
}

#expansionSlider {
  margin: auto;
  width: 20em;
}

#expansionSliderLabel {
  font-size: 1.5em;
  text-align: center;
  padding-bottom: 0.75em;
}

#about {
    margin: auto;
    position: relative;
    top: 20px;
    width: 100px;
    height: 40px;
}

#jokes {
    margin: auto;
    position: relative;
    top: 20px;
    width: 100px;
    height: 40px;
}

#aboutText {
  transition: opactity 3s ease-in;
  cursor: pointer;
  background: #FFFFFF;
  width: 600px;
  height: 1350px;
  border: 4px solid #424242;
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    margin: 0;
    padding: 0;
    color: #FFFFFF;
    width: 100%;
    height: 100%;
}

#crystalType {
    font-size: 40px;
    margin: 0;
    position: absolute;
    text-align: center;
    top: 30px;
    width: 100vw;
}

#controlButtons {
    position: relative;
    z-index: 15;
}

#crystalSelector {
    width: 160px;
    height: 20px;
}

#displaySelector {
    position: relative;
    top: 20px;
    width: 160px;
    height: 20px;
}

#legend {
    margin: auto;
    position: relative;
    top: 20px;
    width: 100px;
    height: 40px;
}

#color {
    margin: auto;
    position: relative;
    top: 20px;
    width: 100px;
    height: 40px;
}

#closeAbout {
  font-size: 3em;
  padding: 0.5em;
  color: white;
  position: fixed;
  top: 0;
  left: 0;
  background: none;
  border: none;
}

#closeAbout:hover {
  color: #ccc;
}

#closeAbout:active {
  color: #aaa;
}

#return {
    margin: auto;
    position: relative;
    top: 20px;
    width: 150px;
    height: 40px;
}

#simulation {
  position: relative;
  width: 100%;
  height: 100%;
  overflow-y: hidden;
}

#legendText {
    /*width: 960px;*/
    height: 0px;
    margin: auto;
    margin-top: 26px;
    line-height: 22vh;
    top: 50vh;
    right: calc(50% - 31.5px);
    position: absolute;
    z-index: 10;
    float: top;
}

#legendText center {
  position: relative;
  top: -40vh;
  display: flex;
  flex-direction: column;
}

#legendText center p {
  padding: 0;
  margin: 0;
}

#hcpHighlightTypeSelector {
  z-index: 20;
  font-size: 1.5em;
  position: absolute;
  float: right;
  top: 0;
  right: 0;
  background-color: #ccc;
  border: 0.1em solid #444;
  border-top: none;
  border-right: none;
  border-bottom-left-radius: 5px;
}

#hcpRingAndLevelSelector {
  font-size: 1.5em;
  position: absolute;
  float: right;
  bottom: 0;
  right: 0;
  background-color: #ccc;
  border: 0.1em solid #444;
  border-bottom: none;
  border-right: none;
  border-top-left-radius: 5px;
  padding: 1em;
}

#viewModeSelector {
  font-size: 1.5em;
  position: absolute;
  float: left;
  bottom: 0;
  left: 0;
  background-color: #ccc;
  border: 0.1em solid #444;
  border-bottom: none;
  border-left: none;
  border-top-right-radius: 5px;
  padding-left: 1em;
  padding-right: 1em;
}

#controlContainer {
  z-index: 20;
  font-size: 1.5em;
  position: absolute;
  float: left;
  top: 0;
  left: 0;
  background-color: #ccc;
  border: 0.1em solid #444;
  border-top: none;
  border-left: none;
  border-bottom-right-radius: 5px;
  padding-left: 1em;
  padding-right: 1em;
}