body.login {
    background-color: #f7f7f7; /* page background */
}

#login h1 a {
    background-image: url('images/custom-logo.png'); /* your logo */
    width: 300px;
    height: 80px;
    background-size: contain;
    background-repeat: no-repeat;
}

.login form {
    background: rgba(255,255,255,0.95);
    border-radius: 32px;
    padding: 30px;
}

.login .button-primary {
    background-color: #007cba;
    border-radius: 6px;
    width: 100%;
    font-weight: bold;
}

@media (max-width: 480px) {
    #login h1 a { width: 200px; height: 50px; }
    .login form { padding: 20px; }
}