Change homepage to no scroll?

Is there a way to make my homepage so that it doesn't scroll? There's not much content on it, but it still scrolls a little. Is there a way to do this through custom CSS (preferably not header injection)?

• Here's the test page: https://www.nateburdette.com
• Password: gogogadget
• Template: York

add to Home > Design > Custom CSS

header#header {
    margin-top: 0;
    padding-top: 3vw;
}