* { box-sizing: border-box; }

/* force scrollbar */
html { overflow-y: scroll; }

body {
    font-family: sans-serif;
}

/* ---- isotope ---- */

.grid {
    background: none;

}

/* clear fix */
.grid:after {
    content: '';
    display: block;
    clear: both;
}

/* ---- .grid-item ---- */

.grid-sizer,
.grid-item {
    width: 25%;

}

.grid-item {
    float: left;

}

.grid-item img {
    display: block;
    max-width: 100%;

}