body {
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
  background: #f4f4f4;
  color: #333;
  text-align: center;
}

header {
  background: #4CAF50;
  color: white;
  padding: 20px;
}

header img {
  display: block;
  margin: 0 auto 10px auto;
}

form {
  margin: 20px auto;
  padding: 20px;
  background: white;
  border-radius: 8px;
  width: 300px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

input, button {
  display: block;
  width: 100%;
  margin: 10px 0;
  padding: 10px;
}

button {
  background: #4CAF50;
  color: white;
  border: none;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

.resultado {
  margin: 20px auto;
  padding: 20px;
  background: #fff;
  width: 300px;
  border-radius: 8px;
  box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}