styles.css

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background-color: #f0f0f0;
  margin: 0;
  padding: 0;
}

.container {
  max-width: 400px;
  margin: 50px auto;
  padding: 20px;
  border: 1px solid #ccc;
  border-radius: 8px;
  text-align: center;
  background-color: #fff;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

h1 {
  margin-bottom: 20px;
  color: #007bff;
}

input[type="number"] {
  width: 100px;
  padding: 8px 12px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 16px;
  text-align: center;
  outline: none;
}

button {
  margin-top: 20px;
  padding: 10px 20px;
  background-color: #007bff;
  color: #fff;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

button:hover {
  background-color: #0056b3;
}

button:active {
  background-color: #003d80;
}

.output {
  margin-top: 30px;
  padding: 15px;
  border: 1px solid #ccc;
  border-radius: 8px;
  font-size: 18px;
  font-weight: bold;
  color: #333;
  word-wrap: break-word;
  }