module Spoom::Coverage::D3

def header_style
  <<~CSS
    svg {
      width: 100%;
      height: 100%;
    }
    .tooltip {
      font: 12px Arial, sans-serif;
      color: #fff;
      text-align: center;
      background: rgba(0, 0, 0, 0.6);
      padding: 5px;
      border: 0px;
      border-radius: 4px;
      position: absolute;
      top: 0;
      left: 0;
      opacity: 0;
    }
    .label {
      font: 14px Arial, sans-serif;
      font-weight: bold;
      fill: #fff;
      text-anchor: middle;
      pointer-events: none;
    }
    .label .small {
      font-size: 10px;
    }
    #{Pie.header_style}
    #{CircleMap.header_style}
    #{Timeline.header_style}
  CSS
end