style.scss

:root {
	--bg: #fff;
	--fg: #000;

	@media (prefers-color-scheme: dark) {
		--bg: #000;
		--fg: #fff;
	}
}

html {
	background-color: var(--bg);
	color: var(--fg);
}

body {
	margin: 0;
	box-sizing: border-box;
}

* {
	color: inherit;
	background-color: inherit;
	border-color: inherit;

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

.octicon {
	fill: currentColor;
	width: 1em;
	height: 1em;
	position: relative;
	top: 4px;
}

.notes {
	display: grid;
	align-items: flex-start;
	flex-wrap: wrap;
	gap: 5px;
	--columns: 8;
	grid-template-columns: repeat(var(--columns), min-content);
}

.note {
	width: 50px;
	height: 50px;
	border: 1px solid var(--fg);
	display: flex;
	align-items: center;
	justify-content: center;

	&.active {
		background-color: red;
	}
}

.app {
	position: relative;
	display: flex;
	flex-direction: column;
	height: 100vh;
}

.toolbar {
	position: sticky;
	top: 0;
	padding: 0.5rem 0;
	background-color: var(--bg);
}
.editor {
	display: flex;
	width: 100%;
	gap: 1rem;
	align-items: stretch;
	flex-grow: 1;
}
.song {
	resize: none;
}
.notesContainer {
	overflow-x: auto;
	overflow-y: hidden;
}
.song,
.notesContainer {
	flex: 1 0 0px;
}