body, html {
    height: 100%;
    margin: 0;
  }
  
  .bg {
    /* The image used */
    background-image: url("../img/FIRST.png");
  
    /* Full height */
    height: 100%; 
  
    /* Center and scale the image nicely */
    background-position: center;
    background-repeat: repeat;
    background-size: cover;
  }

  .button{
    display: flex;
    padding-top: 42%;
    position: absolute;
    left: 50%;
    margin-left: -50px;
  }

  @media (max-width: 767px) {
    .button{
        padding-top: 90%;
    }
  }

  @media (max-width: 400px) {
    .button{
        padding-top: 165%;
    }
  }

  .btnn {
    display: inline-block;
    padding: 10px 20px 10px 20px;
    line-height: 24px;
    color: #FFF;
    background: #fabd0c;
    font-weight: 500;
    font-size: 20px;
    text-transform: uppercase;
    border: 3px solid #fff;
    border-radius: 25px;
  }

  .btnn:hover{
    background: #fff;
    border: 3px solid #fabd0c;
    color: #fabd0c;
  }