body {
  font-family: Arial, sans-serif;
  display: flex;
  flex-direction: column;
  align-items: center;
  margin: 0;
  padding: 20px;
  background: #f5f5f5;
}

h1 {
  margin-bottom: 20px;
}

#canvasContainer {
  margin: 20px 0;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  position: relative;
  display: inline-block;
}

canvas {
  display: block;
  background: #eee;
  border: 1px solid #888;
}

#controls {
  display: flex;
  gap: 10px;
  margin-bottom: 20px;
  align-items: center;
}

#zoomRange {
  width: 120px;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}