* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    list-style: none;
    text-decoration: none;
    color: inherit;
    outline: none;
    font-weight: inherit;
    font-size: 1em;
  }
  header.page-header {
    width:auto;
    margin-right: auto;
    margin-left : auto;
    align-items: center;
    color: #fff;
    text-align : center;
}
header.page-header > h1 {
    font: bold calc(1em + 2 * (100vw - 120px) / 100) 'Dancing Script', cursive,fantasy;
    align-items: center;
    margin-right: auto;
    margin-left : auto;
    width:auto;
    text-align : center;
}

  body {
    background-color: #3D3E6F;
  }
  
  .center {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 512px;
    height: 512px;
  }
  
  #animationDuration {
    width: 50%;
    display: block;
    margin: 2em auto;
    direction: rtl;
  }