.HolyGrail-body {
  flex: 1;
  background-color: #708090;

}

.nav{
    border:1px solid #ccc;
    border-width:1px 0;
    list-style:none;
    margin:0;
    padding:0;
    text-align:center;
}
.nav li{
    display:inline;
}
.nav a{
    display:inline-block;
    padding:10px;
    padding: 30px 30px 30px 30px 30px;
  text-decoration: none;
  font-size: 25px;
  color: #0000cd;
  border: 1px solid #333;
  box-shadow: 8px 8px 5px #444;
  background-image: linear-gradient(180deg, #fff, #ffd700 40%, #daa520);
}

.nav a:hover {
  color: brown; 
}

h1 {
  font: 24px sans-serif;
}
.bar {
  fill: silver;
}

.bar:hover {
  fill: orange;
}

.axis {
  font: 10px sans-serif;
}

.axis path,
.axis line {
  fill: none;
  stroke: #000;
  shape-rendering: crispEdges;
}

.x.axis path {
  display: none;
}