.gallery { /* additional styles... */ width: 100%; margin: 0 auto; } .item { display: inline; vertical-align: top; /* additional styles... */ width: 33%; margin: 0.15%; padding: 0!important; } .button{ background: none; border: none; border-bottom: 1px #efc416 solid; margin: 20px; } @media only screen and (max-width: 600px) { .item { display: inline; vertical-align: top; /* additional styles... */ width: 100%; margin: 1.5%; } } .img1{ height: 400px; width: 500px; background: url(../images/gal/1.jpg); background-size: cover; background-position: center;