Reduce height of Newsletter Block

How can I reduce the height of the navigation block? 

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Password: 123456

Add to Design > Custom CSS

@media screen and (min-width: 768px) {
#footer-sections .newsletter-form-header-description p {
    margin-bottom: 0;
}
#footer-sections .newsletter-form .newsletter-form-header-description {
    line-height: 1em;
}
#footer-sections .newsletter-block .newsletter-form-fields-wrapper {
    margin: 0;
}}