#wrap{ 
width: 500px;
height: 500px;
border:1px solid;
margin:0 auto

}
.item{ 
width: 100px;
height: 100px;
box-sizing:border-box;
border:1px solid black;
text-align:center;
float:left;
}
.item:before{ 
height:100%;
display:inline-block;
content:'';
vertical-align:middle
}
.item b{ 

display:inline-block;
vertical-align:middle

}
.block{ text-align: center; }
#start{
	margin:20px;
	font-size:20px
	
} 
#win{ 
width: 300px;
height: 200px;
position:fixed;
top:20px;
left:40%;
text-align:center;
padding:50px;
background:gold;
font-size:50px;



}