svg {
  max-height: 90vh;
  width: 100%;
}

.link {
    stroke: #000;
    stroke-width: 1.5px;
  }
  
  .node {
    cursor: move;
    stroke: #000;
    stroke-width: .07vw;
    fill-rule: evenodd;
  }
  
  .node.fixed {
    stroke: #30dfdf;
    stroke-width: .05vw;
  }

@media(min-width: 768px) {

    body {
        max-height: 90vh;
        min-width: 100vw;
    }
      svg { 
          height: 50 !important;
          width: 200;
      }
}