.main-content {
	width: 640px;
	margin: 20px auto;
}

@media (max-width: 767px) {
	.main-content {
		width: 100%;
	}
}

.content-box {
	margin:20px auto;
	border-bottom:dotted 1px #cccccc;
	width:80%;
}

table {
	padding: initial;
	margin: initial;
	border-collapse: initial;
}

tr, td {
	padding: 6px;
}