html,body{
  overflow:hidden;
  user-select:none;
}

ul{
  margin:12px auto;
}

li{
  display:inline-block;
  width:9vw;
  height:9vmin;
  line-height:9vmin;
  border:2px solid #000;
  text-align:center;
  margin:1px;
}

#word li{
  height:12vmin;
  line-height:12vmin;
  background-color:#ccc;
}
#word li.ok{
  background-color:#afa;
}
#keyboard li{
}
#keyboard li:hover{
  background-color:#eee;
  cursor:pointer;
}
#keyboard.clear li{
  background-color:#000;
}

c{
  display:block;
  font-size:48px;
  font-weight:bold;
  margin:12px auto;
  text-align:center;
}