#prt-thumbs {
	padding: 0;
	margin: 0;
	list-style: none;
}
.portfolio-thumbs li {
	float: left;
	margin: 2px;
	background: #fff;
	/* padding: 8px; */
	position: relative;
	box-shadow: 0 1px 3px rgba(0,0,0,0.1);
	width: calc(25% - 4px);
}
.portfolio-thumbs li a,
.portfolio-thumbs li a img {
	display: block;
	position: relative;
	max-width: 100%;
}
.portfolio-thumbs li a {
	overflow: hidden;
}
.portfolio-thumbs li a div {
	position: absolute;
	background: rgba(0, 0, 0, 0.25);
	width: 100%;
	height: 100%;
}

ul.portfolio-thumbs span.prt-wrap {
	position: absolute;
	bottom: 0;
	left: 0;
	width: 100%;
	display: block;
	color: #fff;
}

ul.portfolio-thumbs span.prt-title {
	display: block;
	margin: 0px 0px 5px 20px;
	padding: 0px 0px 0px 10px;
	font-size: 24px;
	line-height: 28px;
	font-weight: 700;
}

ul.portfolio-thumbs span.prt-cat {
	display: block;
	margin: 0px 0px 20px 0px;
	padding: 0px 0px 0px 30px;
	font-size: 18px;
	line-height: 20px;
	font-weight: 400;
}

@media only screen and (max-width : 991px) {
	.portfolio-thumbs li {
		width: calc(33.333% - 4px);
	}
}

@media only screen and (max-width : 767px) {
	.portfolio-thumbs li {
		width: calc(50% - 4px);
	}
}

@media only screen and (max-width : 480px) {
	.portfolio-thumbs li {
		width: calc(100% - 4px);
	}
}