// _base.scss

* {
	&, &::after, &::before {
		box-sizing: border-box;
	}

	&::selection {
		color: #999;
		background: #323232;
	}
}

html {
	height: 100%;
	width: 100%;

	background: #fff;
}

img {
	display: block;
	max-width: 100%;
	height: auto;
}

a {
	color: #9ab8b6;
	text-decoration: none;
}

// _base.scss

* {
	&, &::after, &::before {
		box-sizing: border-box;
	}

	&::selection {
		color: #999;
		background: #323232;
	}
}

:root {
	height: 100%;
	width: 100%;

	background: #fff;
}

img {
	display: block;
	max-width: 100%;
	height: auto;
}

a {
	color: #9ab8b6;
	text-decoration: none;
}

Use root selector instead of selecting html directly
Use root selector instead of selecting html directly
