style.css

body{
    font-family: urbane, sans-serif;
    font-weight: 500;
    font-style: normal;
    background-color: #000029;
    background-image: url(./img/back.png);
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;

}

#top .top_1{
    color: #DF0081;
    font-size: 55px;
    text-align: center;
    margin-top: 10pt;
    margin-bottom:-10px;
}

#top .top_2{
    color: #00AFEF;
    font-size: 55px;
    text-align: center;
    margin-top: -10pt;
    margin-bottom: 0px;
}

#bts .bt{
    width: 200px;
    font-size: 40px;
    font-weight: bold;
    text-decoration: none;
    display: block;
    text-align: center;
    padding: 0px 0 0px;
    color: #fff;
    background-color: #DF0081;
    border-radius: 25px;
    margin: auto;
    position: absolute;
    right: 0;
    bottom: 50px;
    left: 0;
}

#loader-bg {
    display: none;
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0px;
    left: 0px;
    background: #000028;
    z-index: 1;
  }
  #loader {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    width: 200px;
    height: 200px;
    margin-top: -400px;
    margin-left: -350px;
    text-align: center;
    color: #fff;
    z-index: 3;
  }


 .circle{
    display: inline-block;
    width: 200px;
    height: 200px;
    border-radius: 50%;
    background: #fff;
    margin:auto;
    position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0; 
  z-index: 10;
  }

  img {
    max-width: 100%;
    display: block;
    margin:auto;
    position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0; 
  z-index: 20;
  }