web/src/app.css

body {
  margin: 0;
}
:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;
}
path.svelte-flow__edge-path {
  stroke-width: 2;
  stroke: black;
}
.svelte-flow__edge.selected path.svelte-flow__edge-path {
  stroke-width: 5;
  stroke: black;
}
.svelte-flow__handle {
  border-color: black;
  background: white;
  width: 10px;
  height: 10px;
}
.svelte-flow__arrowhead * {
  stroke: none;
  fill: black;
}