demo.css

        body {
            font: 10px sans-serif;
        }
        .linage {
            fill: none;
            stroke: #000;
        }
        .marriage {
            fill: none;
            stroke: black;
        }
        .marriageNode {
                        background-color: black;
                        border-radius: 50%;
        }
        .man {
            background-color: lightblue;
                        border-style: solid;
                        border-width: 1px;
                        box-sizing: border-box;
        }
        .woman {
                        background-color: pink;
                        border-style: solid;
                        border-width: 1px;
                        box-sizing: border-box;
        }
        .emphasis{
                        font-style: italic;
        }
        p {
                padding:0;
                margin:0;
        }
        svg {
                border-style: solid;
                border-width: 1px;
        }