body {
  font-family: sans-serif;
  background: #1c1c1c;
  color: #fff;
  text-align: center;
  padding: 30px;
}

.container {
  max-width: 900px;
  margin: auto;
}

input, button {
  margin: 10px;
  padding: 10px;
  font-size: 16px;
  border: none;
  border-radius: 4px;
}

input {
  width: 200px;
}

button {
  background-color: #1976d2;
  color: white;
}

button:disabled {
  background-color: #555;
}

canvas, img {
  max-width: 100%;
  margin-top: 20px;
  border: 2px solid #fff;
}