body {
    background-color: #121212;
    color: #e0e0e0;
    font-family: 'Segoe UI', sans-serif;
    margin: 0;
    padding: 0;
  }
  
  .container {
    max-width: 600px;
    margin: 40px auto;
    background: #1e1e1e;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 0 15px rgba(0,0,0,0.5);
  }
  
  h1 {
    margin-bottom: 10px;
    color: #ffffff;
  }
  
  p {
    margin-bottom: 10px;
    color: #bbb;
  }
  
  input[type="file"] {
    background: #2b2b2b;
    color: #ccc;
    padding: 10px;
    border-radius: 5px;
    border: 1px solid #555;
    margin-bottom: 10px;
  }
  
  button {
    margin-top: 10px;
    padding: 10px 20px;
    background-color: #0078d7;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
  }
  
  button:disabled {
    background-color: #444;
    cursor: not-allowed;
  }
  
  button:hover:enabled {
    background-color: #005fa3;
  }
  
  .exemplo img {
    width: 200px;
    height: 200px;
    object-fit: cover;
    margin: 10px 0;
    border-radius: 10px;
    border: 2px solid #444;
  }
  
  .preview-area {
    display: flex;
    justify-content: space-around;
    margin-top: 20px;
  }
  
  canvas {
    border: 2px dashed #666;
    border-radius: 10px;
  }
  
  .resultado {
    margin-top: 20px;
    font-size: 1.2em;
  }
  
  .ok {
    color: #90ee90;
  }
  
  .erro {
    color: #ff6961;
  }