body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-color: #f4f4f4;
  }
  
  .calculator-container {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
    text-align: center;
    height: 55vh;
    width: 25vw;
  }
  
  label {
    display: block;
    margin: 10px 0;
  }
  
  input {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    box-sizing: border-box;
    border: 1px solid #ccc;
    border-radius: 4px;
  }
  
  button {
    background-color: #007BFF;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
  }
  
  .result {
    margin-top: 20px;
  }
  
  .number {
    font-size: 24px;
    font-weight: bold;
    color: #007BFF;
  }
  
  .bmi-label {
    font-size: 18px;
    color: #333;
  }