.bmr-calculator {
  max-width: 420px;
  margin: 30px auto;
  padding: 25px;
  border-radius: 12px;
  background: #ffffff;
  box-shadow: 0 4px 15px rgba(0,0,0,0.1);
  font-family: Arial, sans-serif;
  color: #222;
}

.bmr-calculator h2 {
  text-align: center;
  margin-bottom: 20px;
  color: #0077cc;
}

.bmr-calculator label {
  display: block;
  margin: 12px 0 5px;
  font-weight: bold;
}

.bmr-calculator input,
.bmr-calculator select {
  width: 100%;
  padding: 10px;
  margin-bottom: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 15px;
}

.bmr-calculator input:focus,
.bmr-calculator select:focus {
  border-color: #28a745;
  outline: none;
}

.bmr-calculator button {
  width: 100%;
  padding: 12px;
  background: #28a745;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 16px;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s;
}

.bmr-calculator button:hover {
  background: #218838;
}

.result-box {
  margin-top: 18px;
  padding: 15px;
  border-radius: 8px;
  background: #f1f9ff;
  border-left: 5px solid #0077cc;
  font-size: 16px;
  color: #222;
}