body {
    margin: 0px;
}
img#blick:hover{
    opacity : 0.60;
    filter : alpha(opacity=60);
    }
#container__portfolio {
    text-align: "center";
    margin: 0 auto;
    width: 650px; 
    height:100vh;
    display: flex;
    align-content: stretch;
    justify-content: space-around;
    align-items: center;
}

#container__portfolio a  img {
    width: 286px;
    height: 254px;
}

@media (max-width: 767px) {
	#container__portfolio {
		flex-direction: column;
        width: 450px;
		height:80vh;
        margin-top: 10vh;
	}
}