style.css

/*Some code used from http://bl.ocks.org/nelliemckesson/5315143*/

body {
  background-color: #ADD8E6;
}

text {
  position: relative;
  color: black;
  font-family: sans-serif;
  font-size: 25px;
  left:1100px; 
  top:100px;
  z-index: -1;
}

.headertxt {
  text-align: center;
  font-family: sans-serif;

}

.chart rect:first-of-type {
  position: absolute;
  color: #fff;
  stroke: #3994b6;
  fill: #7fbf7b;
  z-index: 1;

}

.chart rect:nth-of-type(2) {
  position: absolute;
  color: #fff;
  fill: #af8dc3;
  z-index: 1;
}

.title {
  display: block;
  margin-left: auto;
  margin-right: auto;
}

.svg-container {
    display: inline-block;
    position: relative;
    width: 100%;
    padding-bottom: 100%;
    overflow: hidden;
    min-height:700px;
    min-width:800px;
    z-index: 0;
}
.svg-content {
    display: inline-block;
    position: absolute;
    top: 0;
    left: 0;
}
.plane {
  position: relative;
   margin-left: auto;
   margin-right: auto;
   margin-top: auto;
   display: block;    
   width: auto;
   height: auto;
   max-width: 500px;
   max-height: 700px;
   z-index: 2;
}

.btn_img {
   position: relative;
   margin-left: auto;
   margin-right: auto;
   margin-top: -auto;
   display: block;    
   width: auto;
   height: auto;
   max-width: 75px;
   z-index: 2;
}

.button {
  position:absolute;
  padding:1px;
}

h1 {
    text-align: center;
    color: #5257b8;
}