*, *::before, *::after {
	box-sizing: inherit;
}

html {
	font-family: $sans-font-stack;
	color: $text-color;

	min-height: 100vh;
	box-sizing: border-box;

	background-color: $background-start-color;
}

body {
	margin: $page-edge-padding;
}

.sidebar {
	flex-basis: 270px;
	min-width: 270px;
	margin-right: $page-edge-padding;
}

*, *::before, *::after {
	box-sizing: inherit;
}

html {
	font-family: $sans-font-stack;
	color: $text-color;

	min-height: 100vh;
	box-sizing: border-box;

	background-color: $background-start-color;
}

body {
	margin: $page-edge-padding;
}

.sidebar {
	flex-basis: 270px;
	min-width: 270px;
	margin-right: $page-edge-padding;
}

menu {
	padding: 0;
	margin: 0;
}

Remove margin and padding from <menu>
Remove margin and padding from <menu>
