html, body {
  height: 100%;
  background-color: #373737;
}

body {
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  touch-action: none;
}

.button {
  background-color: #e7e7e7;
  border: inset;
  color: black;
  padding: 15px 32px;
  margin: 5px;
  text-align: center;
  text-decoration: none;
  display: inline-block;
  font-size: 16px;
}

ul {
  list-style-type: none;
  font-size: small;
  margin: 0;
  padding: 0;
  overflow: hidden;
  background-color: #333;
}

li {
  float: left;
}

li a {
  display: block;
  color: white;
  text-align: center;
  padding: 14px 16px;
  text-decoration: none;
}

/* Change the link color to #111 (black) on hover */
li a:hover {
  background-color: #111;
}