html,
body {
  height: 100%;
}

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

.form-signin{
    width: 100%;
    max-width: 700px;
    padding: 15px;
    margin: auto;
}

.text-center{
    text-align: center;
}

.login-botton{
    margin-top: 80px;
}