style.css

/* Base on a game name "Dalek" by Heiko Selber */
/* Written by: Eyal Schachner */
body {
  background: black;
  font-family: courier new;
  margin: 0px;
}

#scoreline {
  text-align: center;
  font-size: 2vw;
  font-weight: bold;
  color: #00DDDD;
  padding: 4px 0px;
  margin: 0px 0px px 0px;
}

#grid {
  margin-left: auto;
  margin-right: auto;
  padding: 0px 0px;
  margin-bottom: 10px;
}

#grid TR TD {
  border: 1px solid white;
  background: #aaaaaa;
  width: 36px;
  height: 36px;
}

#grid TR TD.empty {
  background: gray;
}

#grid img {
  max-width: 100%;
  max-height: 100%;
}

#grid TR TD.tank {
  background-image: url('image/tank.png');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 100%;
  overflow: hidden;
}

#grid TR TD.missile {
  text-align: center;
  vertical-align: middle;
  overflow: hidden;
}

#grid TR TD.explosion {
  background-image: url('image/shield.png');
  background-repeat: no-repeat;
  background-position: center center;
  background-size: 100%;
  overflow: hidden;
}

#scoreId,
#levelId,
#hiscoreId {
  display: inline;
}

#ccc {
  display: table;
  margin-left: auto;
  margin-right: auto;
  padding: 0px 0px;
}

#control {
  display: table-row;
}

#arrow {
  display: table-cell;
  max-width: 200px;
  max-height: 180px;

}

#arrow button {
  width: 50px;
  height: 50px;
  border: 0;
  cursor: pointer;
  margin: 5px 5px 5px 5px;
}

#blow button {
  display: table-cell;
  background:red;
  width: 80px;
  height: 50px;
  border: 2;
  color: white;
  font-weight: bold;
  cursor: pointer;
  margin: 10px 20px 15px 20px;
}

#jump button {
  display: table-cell;
  background:green;
  width: 80px;
  height: 50px;
  border: 2;
  color: white;
  font-weight: bold;
  cursor: pointer;
  margin: 10px 20px 15px 20px;
}

#reset button:hover {
  background: red;
  color: white;
}

#reset button {
  display: table;
  margin: 0 auto;	
  width: 80px;
  height: 40px;
  border: 0px;
  cursor: pointer;
  background: white;
  color: black;
  font-weight: bold;
  margin-top: 10px;
}

#msg {
  position: fixed;
  text-align: center;
  z-index: 1;
  color: red;
  background-color: white;
  font-size: 2.5vw;
  font-weight: bold;
  top: 30%;
  left: 50%;
  transform: translate(-50%, -50%);  
}

.modal {
  display: none;
  position: fixed;
  z-index: 2;
  padding-top: 20px;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  overflow: auto;
  background-color: gray;
}

.modal-content {
  background-color: #222;
  color: white;
  margin: auto;
  padding: 10px;
  border: 1px solid #888;
  width: 480px;
}

.close {
  color: white;
  float: right;
  font-size: 3vw;
  font-weight: bold;
}

.close:hover,
.close:focus {
  color: #888;
  text-decoration: none;
  cursor: pointer;
}

.tg-modal .image {
  text-align: center; 
  vertical-align: middle; 
  overflow:hidden;
}

.tg-modal .caption {
  padding: 5px 15px;
  color: white;
  font-weight: bold;
}

.tg-modal .btn {
  margin:0px 0px;
  width: 80px;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
}


@media (max-width: 700px) {
	#scoreline {
	  text-align: center;
	  font-size: 4vw;
	  font-weight: bold;
	  padding: 0px 0px;
	  margin: 0px 0px px 0px;
	}
	
	#msg {
	  position: fixed;
	  text-align: center;
	  z-index: 1;
	  color: red;
	  background-color: white;
	  font-size: 5vw;
	  font-weight: bold;
	  top: 30%;
	  left: 50%;
	  transform: translate(-50%, -50%);  
	}	

	#jump button {
	  display: table-cell;
	  background:green;
	  width: 50px;
	  height: 50px;
	  border: 2;
	  color: white;
	  font-weight: bold;
	  cursor: pointer;
	  margin: 10px 20px 15px 20px;
	}

	#blow button {
	  display: table-cell;
	  background:red;
	  width: 50px;
	  height: 50px;
	  border: 2;
	  color: white;
	  font-weight: bold;
	  cursor: pointer;
	  margin: 10px 20px 15px 20px;
	}
}