@media (min-width: 769px) {
    .logo {
        width:90px
    }

    .logo_start img {
        object-fit: cover; 
	    width: 100%; 
	    height: 100%;
        max-width: 600px;
        display: flex; 
        margin: 0 auto;
    }
}

@media screen and (max-width: 768px) {
    .logo {
        width:90px
    }

    .logo_start img {
        width:150px;
        display: flex; 
        margin: 0 auto;
    }
}

.logo--pure {
    display: block;
    margin: 0 auto
}


.object-fit { 
	width: 300px; 
	height: 300px; 
	margin: 4em auto; 
	border:1px solid green;
}
.object-fit img { 
	object-fit: cover; 
	width: 100%; 
	height: 100%;
}