.grid_system .header
{
    background-color: white;
    border-radius: 10px;
    font-weight: bold;
    border: 2px solid darkgray;
    margin: 10px;
    padding: 4px;
}

.grid_system .cells .content
{
    background-color: white;
    border-radius: 10px;
    border: 2px solid darkgray;
    margin: 10px;
    padding: 4px;
}

.grid_system .elemento
{
    padding: 0px;
    margin: 0px;
}


.grid_system .content
{
    margin: 0px;
}