*{margin:0;padding:0;box-sizing:border-box}.calculator{background-color:#d1e4e7;padding:20px;border-radius:10px;box-shadow:0 0 10px #0000001a}body{font-family:Arial,sans-serif;background-color:#f0dbdb;display:flex;min-height:100vh;flex-direction:column;justify-content:space-between;align-items:center;text-align:center;margin:10px}button{background-color:#4caf50;border:none;color:#fff;padding:20px;text-align:center;text-decoration:none;display:inline-block;font-size:16px;margin:10px;cursor:pointer;border-radius:5px}footer{width:100%;background-color:#929099;color:#fff;text-align:center;padding:10px 0;position:relative;bottom:0;margin-top:100px}