html, body {
    height: 100%;
}

body {
    display: flex;
    align-items: center;
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #f5f5f5;
}

.form-login {
    max-width: 450px;
    padding: 25px;
    background-color: #eee;
}