* { box-sizing: border-box; }

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

body { font-family: sans-serif; }

/* ---- grid ---- */

.grid {
  /*background: #fff;*/
}

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

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

.grid-sizer,
.grid-item {
  width: 33.333%;
}

.grid-item {
  float: left;
  padding:0.2em
}

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

@media screen and (max-width:720px){
.grid-sizer, .grid-item { width: 100%;
} 	
}