.gallery-thumbnail
{
    max-width: 100%;
    height: auto;
}

.grid-sizer,
.grid-item
{
    width: 20%;
}

.grid-item figure,
.grid-item > div
{
    margin: 0;
    margin: .4rem;
}

/*  masonry grid media queries */
@media screen and (max-width: 2200px)
{
    .grid-sizer,
    .grid-item
    {
        width: 20%;
    }
}

@media screen and (max-width: 1800px)
{
    .grid-sizer,
    .grid-item
    {
        width: 30%;
    }
}

@media screen and (max-width: 1600px)
{
    .grid-sizer,
    .grid-item
    {
        width: 33.33%;
    }
}

@media screen and (max-width: 1224px)
{
    .grid-sizer,
    .grid-item
    {
        width: 33.33%;
    }
}

@media screen and (max-width: 980px)
{
    .grid-sizer,
    .grid-item
    {
        width: 50%;
    }
}

@media screen and (max-width: 720px)
{
    .grid-sizer,
    .grid-item
    {
        width: 50%;
    }
}

@media screen and (max-width: 480px)
{
    .grid-sizer,
    .grid-item
    {
        width: 100%;
    }
}

@media screen and (max-width: 50em)
{
    .content
    {
        padding: 0 10px;
    }
    .grid figure
    {
        display: inline-block;
        float: none;

        width: 100%; 
        margin: 10px auto;
    }
}