body {
  font-family: sans-serif;
  text-align: center;
  background: #f5f5f5;
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 400px;
  margin: auto;
  background: white;
  padding: 20px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.1);
}

#overlay-options img {
  width: 60px;
  margin: 5px;
  border: 2px solid transparent;
  border-radius: 8px;
  cursor: pointer;
}

#overlay-options img:hover {
  border-color: #007BFF;
}

canvas {
  border: 1px solid #ccc;
  margin: 20px 0;
  max-width: 100%;
}

.buttons button, .buttons a {
  padding: 10px 20px;
  margin: 5px;
  display: inline-block;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  color: white;
  background: #007BFF;
  cursor: pointer;
}

.buttons button:hover, .buttons a:hover {
  background: #0056b3;
}