.magazine
{
    width: 23%;
    margin: 1%;
    float: left;
}
.magazine img
{
    width: 100%;
}
@media (max-width:600px)
{
    .magazine
    {
        width: 48%;
    }
}


@media (max-width:400px)
{
    .magazine
    {
        width: 100%;
        margin: 0 0 10px 0;
        float: none;
    }
}