body {
  text-align: center;
  background-color: #111;
  color: white;
  font-family: Arial;
}

#arena {
  position: relative;
  width: 600px;
  height: 200px;
  margin: 30px auto;
  background-color: #333;
  border: 2px solid #555;
  border-radius: 10px;
  overflow: hidden;
}

.character {
  position: absolute;
  top: 80px;
  font-size: 40px;
  z-index: 1;
}

#player {
  left: 50px;
}

#bot {
  right: 50px;
}

.bomb {
  position: absolute;
  top: 90px;
  font-size: 30px;
  transition: left 2s linear;
  z-index: 5;
}

#score {
  font-size: 22px;
  margin-top: 10px;
}

#message {
  margin-top: 15px;
  font-size: 18px;
}