html, body {
      margin: 0;
      padding: 0;
      width: 100%;
      height: 100vh;
}

body {
      background: url(../img/in.gif) no-repeat 30% 30%;
      background-size: cover;

}

#cont{
  display: block;
  position: absolute;
  top:10%;
  left:40%;
}

#txt{
  color:#ffffff;
  font-size:30px;
  font-style:normal;
  font-weight:normal;
  text-transform:normal;
  text-decoration:normal;
  font-family: Tahoma, Garamond ,sans-serif;
  text-align:center;
}