html, body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

body {
  /*background: #444444;*/
  overflow: hidden;
  user-select: none;
}

button {
  /*box-shadow: 2px 4px 0px #999;*/
  transition: all 200ms;
}
button:focus { outline: none; }
button:active {
  transform: scale(1.25)
}

.newGameBtn {
  border-radius: 10px;
  padding: 10px 20px;
  background: transparent;
  color: #ccc;
  position: absolute;
  bottom: 80px;
  left: 50%;
  margin-left: -50px;
  border: solid 1px #ccc;
}

.introBtn{
  border-radius: 10px;
  padding: 20px 30px;
  font-size: 25px;
  background: transparent;
  color: #ccc;
  position: absolute;
  bottom: 30%;
  left: 50%;
  margin-left: -85px;
  margin-bottom: +20px;
  border: 0;
}