1 #chart {

     2   font: 10px sans-serif;

     3   shape-rendering: crispEdges;

     4 }

     5 

     6 .day {

     7   fill: #fff;

     8   stroke: #ccc;

     9 }

    10 

    11 .month {

    12   fill: none;

    13   stroke: #000;

    14   stroke-width: 2px;

    15 }