html,
body {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

canvas {
  display: block;
}

.form-upload {
  position: absolute;
  color: white;
  padding: 5rem;
  background-color: blueviolet;
  border-radius: 2rem;
  opacity: 80%;
  
}

#close-button {
  position: absolute;
  top: 1rem;
  right: 1rem;
}

.input-upload {
  width: 100%;
  height: 100%;
}