Portfolio Page - Viewport Test Case

I am trying to pass the last test case for the Portfolio page which is:

2. The height of the welcome section should be equal to the height of the viewport.

This is my CSS configuration for #welcome-section:

#welcome-section {
	padding: 30px;
	height: 100vh;
	display: flex;
	text-transform: uppercase;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	background-color: brown;
	margin-bottom: 0px;


I already set the height to 100vh. I wonder why I still got this error message:

The height of #welcome-section is not equal to the height of the viewport: expected 622 to be close to 485 +/- 1.

Could anyone explain what 622 and 485 means?
Here is the link to my codepen: https://codepen.io/vchan14/pen/rNBeNPM?editors=1100