html {

    background: url(../img/bg/bg.jpg) top center no-repeat;

    background-size: cover;

}

body {

    font-size: 11px;

    font-family: Tahoma, Arial;

    color: #000;

}

.site {

    position: relative;

    left: 0px;

    right: 0px;

    margin: auto;

    width: 980px;

    height: 900px;

}

.code {

    position: absolute;

    top: 50px; 

    left: 0px;

    right: 0px;

    margin: auto;

    width: 250px;

    height: 60px;

    background: #FFF;

    text-align: center;

    padding: 20px;

    border-radius: 10px;

}