body {
    margin: 0;
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #a084ca, #d3bfff);
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
  }
  
  .container {
    text-align: center;
    background: white;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
    max-width: 400px;
    width: 100%;
  }
  
  h1 {
    font-size: 1.4rem;
    color: #4b3b73;
    margin-bottom: 20px;
  }
  
  #upload {
    margin-bottom: 20px;
  }
  
  canvas {
    display: none;
    margin-top: 20px;
    max-width: 100%;
    border-radius: 10px;
  }
  
  button {
    margin-top: 20px;
    background-color: #805ad5;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background 0.3s;
  }
  
  button:hover {
    background-color: #6b46c1;
  }

#download {
  display: none;
}

canvas {
  display: none;
  margin-top: 20px;
  max-width: 100%;
  border-radius: 10px;
  touch-action: none; /* importante pro mobile */
}