.fd-calculator{max-width:400px;margin:20px auto;padding:20px;border-radius:12px;box-shadow:0 4px 10px rgb(0 0 0 / .1);background:#fff;font-family:Arial,sans-serif}.fd-calculator h2{text-align:center;color:#333}.fd-calculator label{margin-top:10px;display:block;font-weight:700;color:#555}.fd-calculator input{width:100%;padding:10px;margin-top:5px;border:1px solid #ccc;border-radius:8px}.fd-calculator button{width:100%;margin-top:15px;padding:12px;border:none;background-color:#0073e6;color:#fff;border-radius:8px;font-size:16px;cursor:pointer}.fd-calculator button:hover{background-color:#005bb5}#result{margin-top:15px;padding:10px;background-color:#f4f4f4;border-radius:8px;font-weight:700;color:#333;text-align:center}