body {
  margin:0;
  background:black;
  color:#00ffcc;
  font-family:monospace;
  text-align:center;
}

.menu { padding:20px; }

#arena {
  height:400px;
  border:2px solid #00ffcc;
  position:relative;
}

.lane {
  position:absolute;
  left:90px;
  right:90px;
  height:50%;
  border-top:1px dashed #00ffaa;
}

#lane2 { top:50%; }

.tower {
  position:absolute;
  top:160px;
  font-size:48px;
}

.left { left:10px; }
.right { right:10px; }

.hp {
  height:6px;
  background:#00ff66;
  margin-top:5px;
}

.card {
  display:inline-block;
  border:2px solid #00ffcc;
  padding:8px;
  margin:5px;
  cursor:pointer;
}

.troop {
  position:absolute;
  width:28px;
  height:28px;
  line-height:28px;
  font-size:18px;
}

.player { color:#00ff66; }
.enemy { color:#ff3355; }