body {
  margin: 0;
  font-family: Arial, sans-serif;
  background: #f8f8f8;
  text-align: center;
}

header {
  background: #6a1b9a;
  color: white;
  padding: 20px;
}

.toolbar {
  margin: 15px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}

canvas {
  border: 2px solid #ccc;
  background: white;
  margin: 20px auto;
  display: block;
  touch-action: none;
}

button {
  background: #8e24aa;
  color: white;
  border: none;
  padding: 10px 15px;
  cursor: pointer;
  border-radius: 6px;
}

button:hover {
  background: #6a1b9a;
}

footer {
  background: #eee;
  padding: 10px;
}