.grid, .grid_2, .grid_3{
    width: 100%;
}
.grid1, .grid2, .grid3{
    float: left;
    min-height: 5px;
}

.body_grid{
    width: 90%;
    margin-left: 5%;
    margin-right: 5%;
}

.grid_3 .grid1,.grid_3 .grid2,.grid_3 .grid3{
    width: 33%;
}
.grid_2 .grid1,.grid_2 .grid2{
    width: 49%;
}