Reply To: Trimming whitespace from Logo area at top

Use in Additional CSS

For logo

.themonic-logo {
    padding: 0px 0px 0px 2px;
    margin: 0;
}

For space above H2

.entry-content h2, .comment-content h2 {
    margin-top: 0;
}
div#primary {
    padding-top: 0;
}

There is also a no title page template for this specific use case that does the same thing but better.