body {
  background:#0b0d12;
  color:white;
  font-family:Arial;
  text-align:center;
}

.toolbar, .topbar {
  margin:10px;
}

.gate {
  display:inline-block;
  padding:6px 10px;
  background:#4da3ff;
  margin:4px;
  cursor:grab;
  border-radius:5px;
}

canvas {
  background:#141824;
  border:1px solid #333;
}

button, input {
  margin:4px;
  padding:6px;
  border-radius:5px;
  border:none;
}

pre {
  text-align:left;
  background:#0f1320;
  padding:10px;
  height:120px;
  overflow:auto;
}