style.css

/* Style body and headers */
body {
  font-family: Arial;
  margin-left : 35px;
  margin-right : 35px;
}

h1 {
  text-align: center;
}

/* Style the tab */
.tab {
  overflow: hidden;
  border: 1px solid #ccc;
  background-color: #f1f1f1;
  }
  
/* Style the buttons that are used to open the tab content */
.tab button {
  background-color: inherit;
  float: left;
  border: none;
  outline: none;
  cursor: pointer;
  padding: 14px 16px;
  transition: 0.3s;
}

/* Change background color of buttons on hover */
.tab button:hover {
  background-color: #ddd;
}

/* Create an active/current tablink class */
.tab button.active {
  background-color: #ccc;
}

/* Style the tab content */
.tabcontent {
  display: none;
  padding: 6px 12px;
  border: 1px #ccc;
  border-top: none;
}

/* CSS for the tooltip */
svg title {
  background-color: #333;
  border-radius: 3px;
  color: #fff;
  font-size: 12px;
  padding: 3px 5px;
  position: absolute;
  text-align: center;
  visibility: hidden;
  white-space: nowrap;
  z-index: 9999;
}

svg:hover title {
  visibility: visible;
}

#bar-wrapper {
  position: relative;
}