*{	
	margin:0 auto 0 auto;
	padding:0;
   }
  
body{
width: 960px;
margin: auto;
background-color: black;
font-family: "Lucida Console", Monaco, monospace;
color:white;
font-size:40px;
text-align:center;
	}

	

	
#container{
			border:white solid 1px;
			border-radius:20px;
			margin:15px 0 0 0;
			height:650px;
			padding:0px;
			float:left;
			position:relative;
			}
	
header h3
	{	float:left;
		width:870px;
		font-size: 30px;
		padding: 30px 0;
		display:block;
	}
	
#rockets
	{
		height:630px;
		width:65px;
		margin: 2px 0px;
		padding:15px 0 0 0;
		text-align: center;
		float:right;
		}
#backtoback
		{
		height:440px;
		width:650px;
		float:left;
		margin:10px;
		padding:70px 0 0 12px;
		}
#topics {
		color:black;
		float:left;
		height:530px;
		width:690px;
		margin: 0 0px 0px 140px;
		padding: 0 20px;
		border-radius:20px;
		background:white;
		overflow-y:auto;
		display:block;
		position:relative;
	}

       
	
#nav{	display:block;
		float:left;
		margin:100px 0 0 0;
		padding:0px;
		z-index:2;
		position:absolute;
		width:120px;
      }

.hide{
		display:none;
	}

.numbers{
	position:absolute;
	border:2px solid black;
	border-radius:10px;
	height:50px;
	width:50px;
	cursor:pointer;
	line-height: 50px;
	vertical-align: middle;
}

#score{
	position: absolute;
	border: 3px black dashed;
	height:55px;
	width:290px;
	left:200px;
	margin:15px 0 0 0;
}

#check{
	position:absolute;
	height: 150px;
	width: 360px;
	background:white;
	border:3px solid black;
	border-radius: 20px;
	margin:auto;
	padding:20px;
	top:170px;
	left:145px;
}

#tickyellow, #tickblue, #cross{
	cursor: pointer;
}

#button:hover{cursor:pointer;
}