body.login {
    background: #FFFFFF url(bg.jpg) fixed no-repeat 50% 50%;
    background-size: cover;
}

.login #backtoblog a, .login #nav a, a {
    color: #fff;
}

.login h1 a {
  background-image: url(logo.png) !important;
  background-size: 100px 100px;
  height: 100px;
  width: 100px;
}


.login form {
    background: rgba(255, 255, 255, 0.8);
    border-radius: 5px;
}

.wp-core-ui .button-primary,
.wp-core-ui .button-primary:hover {
    background: #000;
    border-color: #000;
    box-shadow: none;
    color: #fff;
    text-decoration: none;
    text-shadow: none;
}