.content-grid-wrapper { margin-top: 80px; }

.grid-image {text-align: center;}
.grid-image a { display: inline-block; position: relative;}
.grid-image img {    max-height: 300px;}
.grid-image a .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0);
    transition: background .5s ease;
}
.grid-image a .hover-btn {
    position: absolute;
    width: 60px;
    height: 60px;
    top: 0px;
    bottom: 0px;
    margin: auto;
    right: 0px;
    left: 0px;
    width: 60px;
    height: 60px;
    text-align: center;
    opacity: 0;
    transition: opacity .35s ease;
}
.grid-image a:hover img {
	filter: brightness(0.9);
}
.grid-image a:hover .overlay {
    display: block;
    background: rgba(0,0,0,.0);
    cursor: pointer;
}
.grid-image a:hover .hover-btn {
    opacity: 1;
    cursor: pointer;
}
@media only screen and (max-width:767px) {
	.content-grid-wrapper {
		margin-top: 20px;
		margin-bottom: 40px;
	}
	.grid-image { margin-top: 25px;}
}