body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(to right, #8360c3, #2ebf91);
    color: #fff;
    text-align: center;
    padding: 50px;
  }
  
  .container {
    background: rgba(0, 0, 0, 0.2);
    padding: 30px;
    border-radius: 15px;
    max-width: 500px;
    margin: auto;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
  }
  
  input[type="number"] {
    padding: 10px;
    font-size: 18px;
    width: 80%;
    border-radius: 8px;
    border: none;
    margin-bottom: 20px;
  }
  
  button {
    padding: 10px 20px;
    font-size: 18px;
    background-color: #00c9a7;
    border: none;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #00b48a;
  }
  
  .resultado {
    margin-top: 20px;
    font-size: 20px;
  }