style.css

html {
    height: 10vh;
    width: 100%;
    background-color: #aee6e5;
  }
  .body-main{
    height: 100%;
  }
  
  .button {
    width: 66px;
    padding: 20px;
    margin: 0 4px;
    border: 2px solid black;
    border-radius: 50%;
    cursor: pointer;
    font-weight: bold;
    background-color: rgb(195, 172, 193);
    box-shadow: 2px 2px 11px rgb(0, 0, 0);
  }
  
  .row {
    margin: 8px 0;
    color: aqua;
  }
  .yellow{
    background-color: rgb(226, 154, 19);
    z-index: 10;
  }
  .grey{
    background-color: rgb(238, 232, 232);
    z-index: 15;
  }
  .row input {
    width: 291px;
    font-size: 20px;
    margin: 0;
    padding: 8px 0px;
    border: 2px solid black;
    border-radius: 5px;
  }
  .center{
    text-align: center;
}
footer{
  width: 100%;
    background-color: black;
    color: white;
    align-items: center;
    text-align: center;
    position: absolute;
    bottom: 0px;
}