body {
  font-family: Arial, sans-serif;
  background: linear-gradient(to right, #FF7E5F, #FEB47B); /* Warm gradient background */
  margin: 0;
  padding: 20px;
}

.container {
  max-width: 600px;
  margin: auto;
  background: linear-gradient(to right, #ffffff, #f7f7f7); /* Subtle gradient background for the form */
  padding: 20px;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

h1 {
  text-align: center;
  color: #333;
}

.input-group {
  margin-bottom: 15px;
}

label {
  display: block;
  margin-bottom: 5px;
  color: #333;
}

input[type="number"] {
  width: 100%;
  padding: 8px;
  box-sizing: border-box;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-size: 16px;
}

button {
  width: 100%;
  padding: 10px;
  background: #4CAF50;
  color: white;
  border: none;
  border-radius: 4px;
  font-size: 16px;
  cursor: pointer;
}

button:hover {
  background: #45a049;
}

.result {
  margin-top: 20px;
  padding: 15px;
  background: #f9f9f9;
  border: 1px solid #ddd;
  border-radius: 4px;
}