#kvpCalculator{max-width:400px;margin:0 auto;padding:20px;border:2px solid #4caf50;border-radius:10px;background-color:#f9f9f9;box-shadow:0 0 10px rgb(0 0 0 / .1)}#kvpCalculator label{display:block;margin-bottom:10px;font-size:1em;font-weight:700}#kvpCalculator input[type=number]{width:calc(100% - 20px);padding:10px;margin-bottom:20px;border:1px solid #ccc;border-radius:5px;box-sizing:border-box}#kvpCalculator button{display:block;width:100%;padding:10px;background-color:#4caf50;color:#fff;border:none;border-radius:5px;cursor:pointer;font-size:1em;font-weight:700;transition:background-color .3s ease}#kvpCalculator button:hover{background-color:#45a049}#resultHeading{display:none;font-size:1.5em;margin-top:20px}#resultBox{display:none;border:2px solid #4caf50;border-radius:5px;padding:15px;margin-top:10px;background-color:#f9f9f9;box-shadow:0 0 10px rgb(0 0 0 / .1)}.result-item{margin:5px 0;font-size:1.1em;font-weight:700}