body {
    background-image: url("https://mk0tacxpwbcps2mf5.kinstacdn.com/wp-content/uploads/2016/08/Tacx_l_Alp_d_Huez_3.jpg");
    background-size: cover;
    background-repeat: no-repeat;
}

main {
    text-align: center
}

#myChart {
    background-color: rgba(255, 255, 255, 0.8);
    box-shadow: 4px 4px 4px grey;
}

.dot:hover {
    fill: brown;
}

div.tooltip {	
    position: absolute;	
    padding: 10px;				
    font: 12px sans-serif;		
    background: oldlace;	
    border: 0px;		
    border-radius: 8px;			
    pointer-events: none;
    box-shadow: 4px 4px 4px grey;
}