.image_overlay {
    position: relative;
    display: inline-block;
}
.image_overlay_image {
    display: block;
}
.image_overlay_text {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate( -50%, -50% );
    text-align: center;
}
.image_overlay_text p {
	font-weight: bold;
	font-size: 1.5vw;	
	color: #fff;	
}