body {
  font-family: Arial, sans-serif;
  background: #f8f9fa;
  padding: 40px;
}

#calorie-calculator {
  max-width: 500px;
  margin: auto;
  background: #ffffff;
  border: 1px solid #ddd;
  padding: 20px 30px;
  border-radius: 10px;
  box-shadow: 0 0 10px rgba(0,0,0,0.05);
}

#calorie-calculator h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #333;
}

#calorie-calculator input,
#calorie-calculator select {
  width: 100%;
  padding: 8px 10px;
  margin-top: 5px;
  box-sizing: border-box;
  border: 1px solid #ccc;
  border-radius: 5px;
}

#calorie-calculator button {
  background-color: #0073aa;
  color: #fff;
  padding: 12px;
  border: none;
  width: 100%;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  margin-top: 10px;
}

#calorie-calculator button:hover {
  background-color: #005f8d;
}

#result {
  margin-top: 20px;
  font-weight: bold;
  text-align: center;
  color: #222;
}