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

body {
    display: flex;
    align-items: center;
    background-image: url("../img/bg-login.png");
    background-size: cover;
}

.form-signin {
    max-width: 430px;
    padding: 15px;
    background: #ffffff;
}