.calculator-container{background-color:#fff;padding:20px;border-radius:8px;box-shadow:0 0 10px rgba(0,0,0,.1);text-align:center}.calculator-container label{display:block;margin-bottom:5px}.calculator-container input{width:100%;padding:8px;margin-bottom:15px;box-sizing:border-box}.calculator-container button{color:#fff;padding:10px 20px;border:none;border-radius:4px;cursor:pointer}.calculator-container button:hover{background-color:#45a049}#result{margin-top:20px;font-weight:700}