.img-center{
    display: block;
    margin: 0 auto;
}

.chart-hover:hover{

    color: gold;

}

.img-grid{
height: auto;
float: left;
}

.img-grid-item {
    text-align: left;    
    margin: 5px;
    display: inline-block;
    border-radius: 8px;
}