body {
    height: 100%;
    width: 100%;
    background: url('../images/bg.png') repeat;
    background-size: cover;

}

.login-div {
    width: 400px;
    height: 200px;
    border: 1px solid #dedede;
    padding: 40px;
    border-radius: 10px;
    position: absolute;
    top: 50%;
    margin-top: -160px;
    left: calc(50% - 220px);
    background: white;
}

h2 {
    padding-bottom: 20px;
    text-align: center;
}

.login-bt {
    margin-left: 110px;

}