body {
  font-family: Arial;
  background: #f4f4f4;
}

.container {
  width: 400px;
  margin: 40px auto;
  background: white;
  padding: 20px;
  border-radius: 10px;
}

input,
textarea,
button {
  width: 100%;
  margin-top: 10px;
  padding: 10px;
}

canvas {
  margin-top: 20px;
}