.login_form.blocked {
    position: relative;
}

.login_form.blocked::after {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.5) url(images/background-action.gif) no-repeat center;
    content: "";
    cursor: wait;
}

h2 {
    margin-top: 1em;
}