body {
    margin: 0;
    line-height: 4;
    padding: 0;
    display: block;
    background: linear-gradient(to top, #7808f0, #06bdf5);
  }
  .calci {
    width: 500px;
    padding-top: 100px;
    padding-bottom: 100px;
    position: absolute;
    top: 50%;
    left: 70%;
    transform: translate(-50%, -50%);
    transition: 0.25px;
    text-align: center;
  }
  #display {
    border: none;
    background: white;
    border-radius: 30px;
    width: 245;
    font-size: 20;
    font-family: sans-serif;
    font-weight: 300;
    height: 60;
    margin: 10;
    border: 2px solid white;
    color: black;
  }
  .btnDesign {
    width: 55;
    height: 55;
    padding-top: -1;
    background: white;
    border: none;
    font-family: sans-serif;
    font-size: 20;
    font-weight: 300;
    border-radius: 30px;
    margin: 1.5;
  }
  .operatorDesign {
    width: 55;
    height: 55;
    background: white;
    font-size: 55;
    padding-top: -1;
    border: none;
    font-family: sans-serif;
    font-size: 20;
    font-weight: 300;
    border-radius: 30px;
    margin: 1.5;
    transition: 00.25px;
    cursor: pointer;
  }
  .operatorDesign:hover {
    background: color #00d9ff;
  }
  #zero {
    width: 116;
    height: 55;
    font-size: 55;
    padding-top: -1;
    border: none;
    font-family: sans-serif;
    font-size: 20;
    font-weight: 300;
    border-radius: 30px;
    margin: 1.5;
    background: white;
  }
  
  h1 {
    color: white;
    margin-top: 276px;
    margin-left: 190px;
    text-transform: uppercase;
    font-family: sans-serif;
    font-weight: 700px;
    font-size: 50;
    text-decoration: underline;
  }
  h2 {
    color: white;
    margin-top: -150px;
    margin-left: 505px;
    font-family: sans-serif;
    font-size: 40;
  }