div {
	max-width: 960px;
	margin-left: auto;
	margin-right: auto; 
	margin-bottom: 25px;
}

img.center {
	display: block;
	margin-left: auto;
	margin-right: auto; 
}

img.responsive {
	max-width: 100%;
	height: auto;
}

p {
	font-family: "Verdana", Geneva, sans-serif;
	line-height: 1.6;
	font-size: 12px;
	color: gray;
}

p.center {
	font-family: "Verdana", Geneva, sans-serif;
	line-height: 1.6;
	font-size: 12px;
	color: gray;
	text-align: center;
}

p.justify {
	font-family: "Verdana", Geneva, sans-serif;
	line-height: 1.6;
	font-size: 12px;
	color: gray;
	text-align: justify;
}

.row {
	display: flex;
}

.two-columns {
	flex: 50%;
}

.three-columns {
	flex: 33.33%;
	padding: 3px;
}

@media screen and (max-width: 600px) {
	.two-columns
	.three-columns	{
	width: 100%;
	}
}