.node circle {
  fill: #fff;
  stroke: steelblue;
  stroke-width: 3px;
}

.node text { font: 12px sans-serif; }

.link {
  fill: none;
  stroke: #ccc;
  stroke-width: 2px;
}

textarea {
  margin: 10px 0;
}
.message-board {
  color: #FFF;
  overflow-y: auto;
  height: 200px;
  border-radius: 10px;
  margin-top: 20px;
  padding: 20px;
  background-color: #000;
}

.message-board .message-wrapper {
  height: 100%;
  overflow: auto;
}

.message-board .message-wrapper div:before {
  content: '# ';
}

.message-board .message-wrapper div:last-child {
  color: #008000;
}