body {
    font-family: Helvetica;
    font-size: 16px;
    padding: 0px;
    margin: 0px;
}
#game{
    width: 400px;
    text-align: center;
    margin: 10px;
}
#all{
    margin: 0px auto; 
    width: 400px;
    padding: 10px;
}
.field{
    width: 100px;
    height: 100px;
    text-align: center;
    line-height: 100px;
    display: inline-block;
}
.field:hover{
	background-color: #CCCCCC;
}
.empty{}
a.js {
	color: #006699;
	text-decoration: none;
	border-bottom: 1px dashed #006699;
}