html, body {
  margin: 0;
  padding: 0;
}

button {
  /* transition: 0.4s; */
  background-color: white;
  color: blue;
}

button:hover {
  /* transition: 0.4s; */
  background-color: blue;
  color: white;
  /* transition-duration: 0.4s; */

}

.dropdownInfo {
  display: none;
}

ul {
  list-style: circle;
  /* float: left; */
  /* display: inline; */
}

li {
  text-align: center;
  float: left;
  margin-left: 10%;
  margin-right: 10%;
}

#headerList {
  list-style: none;
  display: inline-flex;
  text-align: center;
  /* white-space: nowrap;
  overflow: hidden; */
  margin-right: 300%; /*15.125% */
}

canvas {
  display: block;

  margin: auto;
  top: 0;
  left: 0;
  position: absolute;
  z-index: -1; /* z < 0 means canvas will be behind html(can see html), z >= 0 means canvas will be in front of html(cannot see html) */
}