.bmi-container{width:320px;margin:0 auto;text-align:center;padding:20px 10px;font-family:Arial,sans-serif;background-color:#f2f2f2}h1{color:#333}.input-group{margin-bottom:10px}input[type=text],button{width:163px;padding:8px;border:1px solid #ccc;border-radius:4px}select{padding:8px;border:1px solid #ccc;border-radius:4px}button{background-color:#4caf50;color:#fff;cursor:pointer}button:hover{background-color:#45a049}#result{font-size:18px;font-weight:700;margin-top:20px}