style.css

html, body {
	margin: 0;
	padding: 0;
	background-color: black;
	font-family: comic sans ms, serif;
}

.hidden {
	display: none !important;
}

#game {
	height: 100vh;
	display: flex;
	flex-direction: column;
}

#canvas {
	max-height: calc(100% - 48px);
	flex-grow: 1;
	object-fit: contain;
	image-rendering: pixelated;
}

#top {
	display: flex;
	justify-content: center;
	gap: 20px;
	width: 100%;
	padding: 10px 0;

	font-size: 20px;
	font-weight: bold;
	background-color: #c3c3c3;
}

#top p {
	margin: 0;
}

a:not(.button) {
	text-decoration: none;
	color: #00f;
}

a:not(.button):hover {
	text-decoration: underline;
}

#message {
	display: flex;
	align-items: center;
	justify-content: center;
    text-align: center;

	z-index: 1;
	opacity: 1;
	position: fixed;
	top: 0;
	width: 100%;
	height: 100%;

	background-color: #c3c3c3;
	font-family: arial;
	font-weight: bold;
	font-size: 100px;
}

.animation {
  transition-property: opacity;
  transition-duration: 1s;
  opacity: 0 !important;
}

#menu,#win {
	margin: 200px;
	padding: 30px;
	display: flex;
	flex-direction: column;
	align-items: center;

	background-color: #c3c3c3;
	box-shadow: 0 0 50px #777;
}

.error {
	color: red;
	font-weight: bold;
}

h1 {
	font-size: 50px;
	font-weight: 100;
}

h2 { font-size: 30px; }

a.button {
	transition: 0.5s;

	display: block;
	text-align: center;
	font-size: 20px;
	padding: 8px;
	width: 150px;

	background-color: #999;
	color: white;
	text-decoration: none;
}