* {
	touch-action: none;
}
body {
	margin: 0;
	overflow: hidden;
	background: #a9b0ba;
}
#menu {
	position: absolute;
	inset: 0;
	display: block;
	background: #a9b0ba;
	z-index: 100;
	overflow-y: auto;
}
#menu.hidden {
	display: none;
}
h1 {
	position: sticky;
	top: 0;
	display: block;
	width: 100%;
	text-align: center;
	font-size: 2rem;
	text-transform: uppercase;
	letter-spacing: 0.1em;
	padding: 1rem 0;
	background: #a9b0ba;
}
#level-buttons {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 1rem;
	max-width: 600px;
	margin: 0 auto;
	padding: 1rem 2rem 4rem;
}
#menu-btn {
	position: absolute;
	top: 1rem;
	right: 1rem;
	z-index: 50;
}
.btn {
	font-size: 1.2rem;
	padding: 0.5rem 1rem;
}