estilo.css

body{
    margin:auto;
    width: 100%;
    background: #F0F0F0;
    font: normal normal normal 14px/20px 'Helvetica Neue', Helvetica, Arial, sans-serif;
    color: rgb(85, 85, 85);

}
.header {
    text-align: center;
    height:60px;
    line-height:20px;
    width: 100%;
    background: #DDDDEE;
    border:1px solid #CCC;
    margin:10px auto;
    color: rgb(85, 85, 120);
}
.content {
    box-shadow: rgba(0, 0, 0, 0.0980392) 0px -1px 0px 0px inset, rgba(0, 0, 0, 0.0980392) 0px 1px 10px 0px;
    background: #FFFFFF;
    border: 1px solid #CCC;
    padding: 20px;
    margin: auto auto;
width: 90%;
}

.vis {
    width: 100%;
}

 svg.frac {
    background: hsl(0, 0%, 0%);
    margin: 10px 10px;

}

 svg.frac:hover {
  outline: 1px dashed #BBB;

}
 svg.ctrl {
  outline: 2px solid #082a46;
  margin: 10px 10px;

}
 .ctrl rect{
  outline: 1px solid #888;

}



.ctrl .on {
  fill: hsl(0, 0%, 90%);
}
.ctrl rect:hover {
    opacity: 0.5;
}