body {
  background-color: black;
}

svg {
    background-color: #000;
    cursor: default;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    -o-user-select: none;
    user-select: none;
    margin: 0 auto;
    display: block;
  }
  
  svg:not(.active):not(.ctrl) {
    cursor: crosshair;
  }
  
  #add_node{
    cursor: pointer;
    border: solid 2px white;
    color: white;
    font-size: 20px;
    padding:5px;
  }
  path.link {
    fill: none;
    stroke: #FFF;
    stroke-width: 3px;
    cursor: default;
    stroke-dasharray: 2,3;
    animation: flow 1s linear infinite;
  }

  @keyframes flow {
    from {
      stroke-dashoffset: 14;
    }
  
    to {
      stroke-dashoffset: 0;
    }
  }
  
  
  svg:not(.active):not(.ctrl) path.link {
    cursor: pointer;
  }
  
  path.link.selected {
    stroke-dasharray: 10,2;
  }
  
  path.link.dragline {
    pointer-events: none;
  }
  
  path.link.hidden {
    stroke-width: 0;
  }
  
  circle.node {
    stroke-width: 10px;
    cursor: pointer;
    stroke-dasharray: 2,3;
    animation: flow 1s linear infinite;
   
  }
  
  circle.node.reflexive {
    stroke: #000 !important;
    stroke-width: 2.5px;
  }
  
  text {
    font: 12px sans-serif;
    pointer-events: none;
  }
  
  text.id {
    text-anchor: middle;
    font-weight: bold;
  }