body {
  font-family: Arial, sans-serif;
  background-color: #f0f0f0;
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100vh;
  margin: 0;
  background-image: url(img/12345.jpg);
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
}

.container {
  background-color: white;
  padding: 80px;
  border-radius: 15px;
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
  text-align: center;
}

h1 {
  margin-bottom: 20px;
}

#result {
  font-size: 1.5em;
  margin-top: 20px;
}