body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f0f8ff;
  color: #333;
}

header {
  background: #4a90e2;
  color: white;
  padding: 1rem;
  text-align: center;
}

main {
  padding: 1rem 2rem;
}

#controls {
  margin-bottom: 2rem;
  text-align: center;
}

#controls button {
  padding: 0.5rem 1rem;
  margin: 0 0.5rem;
  font-size: 1rem;
  background: #4a90e2;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s ease-in-out;
}

#controls button:hover {
  background: #357abd;
}

#output {
  background: #fff;
  border: 1px solid #ddd;
  border-radius: 4px;
  padding: 1rem;
}

#circuitDiagram {
  overflow-x: auto;
  margin-bottom: 1rem;
}

svg {
  background: #fafafa;
  border: 1px solid #ddd;
  border-radius: 4px;
}