body {
    font-family: 'Lato', sans-serif;
    background-color: #ffffff;
}
header {
    padding: 20px 0px 0px 0px;
    text-align: center;
}
header h1 {
    color: #F77481;
    font-weight: bold;
    font-size: 3.6em;
    margin-bottom: 0px;
}
header h3 {
  margin-top: 5px;
    color: #999999;
}
.hidden {
  display: none;
}
.highlight {
    color: #F77481;
    border-bottom: 1px #F77481 dotted;
}
.content {
    margin: 0px auto;
    width: 1000px;
    padding: 20px;
    color: #666;
    font-size: 1rem;
    line-height: 1.8;
}
.content h3 {
    margin-top: 40px;
    margin-bottom: 10px;
}
.paragraph {
    padding: 5px;
}
.visualization {
    margin: 20px auto;
    width: 1000px;
    height: 600px;
    text-align: center;
}
.visualization4 {
    display: inline-block;
    width: 495px;
    height: 295px;
}

.img-container {
    text-align: center;
}

.axis {
  stroke: #ccc;
  font-size: 14px;
  fill: none; 
  stroke-width: 3px;
}
.axis .tick{
  fill: #999999;
  stroke-width: 0px;
}
.axis-title {
  font-size: 12px;
  text-transform: uppercase;
  fill: #999;
}

footer {
    text-align: center;
    font-size: 0.8em;
    padding-bottom: 30px;
}

input{
  width:30px;
  background:#fff;
  margin-bottom:5px;
  border:1px solid #ccc;
  padding:5px 10px;
  font-size:95%;
  color:#555;
  text-align: center;
  outline: none;
}

a, a:hover {
  color:#93B668;
}

button{
  background:#F77481;
  border:0;
  padding:5px 10px;
  color:#fff;
  cursor:pointer;
  transition:background .3s;
  -webkit-transition:background .3s;
  outline: none;
}

button:hover{
  background:#F55260;
  outline: none;
}

button:focus{
  background:#93B668;
  outline: none;
}

/* tooltip */
.d3-tip {
  line-height: 1;
  font-weight: bold;
  font-size: 12px;
  padding: 12px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  border-radius: 2px;
  pointer-events: none;
}

/* Creates a small triangle extender for the tooltip */
.d3-tip:after {
  box-sizing: border-box;
  display: inline;
  font-size: 10px;
  width: 100%;
  line-height: 1;
  color: rgba(0, 0, 0, 0.8);
  position: absolute;
  pointer-events: none;
}

/* Northward tooltips */
.d3-tip.n:after {
  content: "\25BC";
  margin: -1px 0 0 0;
  top: 100%;
  left: 0;
  text-align: center;
}

/* Eastward tooltips */
.d3-tip.e:after {
  content: "\25C0";
  margin: -4px 0 0 0;
  top: 50%;
  left: -8px;
}

/* Southward tooltips */
.d3-tip.s:after {
  content: "\25B2";
  margin: 0 0 1px 0;
  top: -8px;
  left: 0;
  text-align: center;
}

/* Westward tooltips */
.d3-tip.w:after {
  content: "\25B6";
  margin: -4px 0 0 -1px;
  top: 50%;
  left: 100%;
}