body {
  font-family: "Arial", sans-serif;
  max-width: 600px;
  margin: 2rem auto;
  padding: 20px;
  background-color: #9dadcf;
}

.calculator {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

h2 {
  color: #2c3e50;
  text-align: center;
  margin-bottom: 1.5rem;
}

.input-group {
  margin-bottom: 1.5rem;
}

label {
  display: block;
  margin-bottom: 0.5rem;
  color: #34495e;
  font-weight: 500;
}

input {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #bdc3c7;
  border-radius: 8px;
  font-size: 16px;
}

button {
  background: #007bff;
  color: white;
  border: none;
  padding: 1rem 2rem;
  border-radius: 8px;
  cursor: pointer;
  width: 100%;
  font-size: 16px;
  transition: background 0.3s ease;
}

button:hover {
  background: #0171e9;
}

.result {
  margin-top: 2rem;
  padding: 1.5rem;
  border-radius: 8px;
  text-align: center;
  font-size: 1.2rem;
  display: none;
}

.good {
  background: #2ecc71;
  color: white;
}

.average {
  background: #f1c40f;
  color: black;
}

.poor {
  background: #e74c3c;
  color: white;
}

/* BMI Guide Styling */
.bmi-guide {
  margin-top: 1.5rem;
  padding: 1rem;
  background-color: #d0e8f2;
  border-radius: 8px;
  display: none;
}

.bmi-guide h3 {
  color: #2c3e50;
  text-align: center;
  margin-bottom: 0.5rem;
}

.bmi-guide ul {
  list-style: none;
  padding: 0;
}

.bmi-guide li {
  padding: 0.5rem 0;
  font-size: 14px;
}