xyflow/src/style.css

.react-flow {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.react-flow__renderer {
  width: 100%;
  height: 100%;
  position: absolute;
}

.react-flow__zoompane {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 1;
}

.react-flow__selectionpane {
  width: 100%;
  height: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 2;
}

.react-flow__selection {
  position: absolute;
  top: 0;
  left: 0;
  background: rgba(0, 89, 220, 0.08);
  border: 1px dotted rgba(0, 89, 220, 0.8);
}

.react-flow__edges {
  position: absolute;
  top: 0;
  left: 0;
  pointer-events: none;
  z-index: 2;
}

.react-flow__edge {
  fill: none;
  stroke: #bbb;
  stroke-width: 2;
  pointer-events: all;

  &.selected {
    stroke: #555;
  }

  &.animated {
    stroke-dasharray: 5;
    animation: dashdraw 0.5s linear infinite;
  }

  &.connection {
    stroke: '#ddd';
    pointer-events: none;
  }
}

@keyframes dashdraw {
  from {
    stroke-dashoffset: 10;
  }
}

.react-flow__nodes {
  width: 100%;
  height: 100%;
  position: absolute;
  z-index: 3;
  pointer-events: none;
  transform-origin: 0 0;
}

.is-interactive {
  .react-flow__node {
    cursor: grab;

    &:hover > * {
      box-shadow: 0 1px 5px 2px rgba(0, 0, 0, 0.08);
    }
  }

  .react-flow__handle {
    cursor: crosshair;
  }
}

.react-flow__node {
  position: absolute;
  color: #222;
  font-family: sans-serif;
  font-size: 12px;
  text-align: center;
  user-select: none;
  pointer-events: all;
  transform-origin: 0 0;

  &.selected > * {
    box-shadow: 0 0 0 2px #555;
  }
}

.react-flow__handle {
  position: absolute;
  width: 10px;
  height: 8px;
  background: rgba(255, 255, 255, 0.4);

  &.bottom {
    top: auto;
    left: 50%;
    bottom: 0;
    transform: translate(-50%, 0);
  }

  &.top {
    left: 50%;
    top: 0;
    transform: translate(-50%, 0);
  }

  &.left {
    top: 50%;
    left: 0;
    transform: translate(0, -50%);
  }

  &.right {
    right: 0;
    top: 50%;
    transform: translate(0, -50%);
  }
}

.react-flow__nodesselection {
  z-index: 3;
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  transform-origin: left top;
  pointer-events: none;

  &-rect {
    position: absolute;
    background: rgba(0, 89, 220, 0.08);
    border: 1px dotted rgba(0, 89, 220, 0.8);
    pointer-events: all;
  }
}

.react-flow__controls {
  box-shadow: 0 0 2px 1px rgba(0, 0, 0, 0.08);

  &-button {
    background: #fefefe;
    border-bottom: 1px solid #eee;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 16px;
    height: 16px;
    cursor: pointer;
    user-select: none;
    padding: 5px;

    svg {
      width: 100%;
    }

    &:hover {
      background: #f4f4f4;
    }
  }
}