index.css

:root {
	--plane-color: rgba(0, 150, 87, 0.96);
	--ball-color: rgba(239, 232, 105, 0.96);
	--arrow-color: rgba(228, 40, 43, 0.96);
	--plane-grid-color: rgba(0, 0, 0, 0.2);
	--plane-grid-width: 1px;
	--plane-grid-horizontal: linear-gradient(
		var(--plane-grid-color) var(--plane-grid-width),
		transparent var(--plane-grid-width)
	);
	--plane-grid-vertical: linear-gradient(
		90deg,
		var(--plane-grid-color) var(--plane-grid-width),
		transparent var(--plane-grid-width)
	);
}

* {
	box-sizing: border-box;
}

body {
	margin: 0;
	position: fixed;
	width: 100vw;
	height: 100vh;
	overflow: hidden;
	background-color: var(--plane-color);
}

div.button {
	position: absolute;
	inset: 0;
	z-index: 3;
	background-color: rgba(0, 0, 0, 0.32);
	cursor: pointer;
}

div.button::before {
	content: '';
	position: absolute;
	inset: 0;
	margin: auto;
	width: 64px;
	height: 64px;
	background-color: rgba(255, 255, 255, 0.48);
	background-image: url(assets/images/capsule-corp.logo.svg);
	background-position: center;
	background-size: 56%;
	background-repeat: no-repeat;
	border-radius: 100%;
}

div.button::after {
	content: '';
	position: absolute;
	inset: 0;
	margin: auto;
	width: 96px;
	height: 96px;
	background: rgba(255, 255, 255, 0.32);
	border-radius: 100%;
	animation: growing 1s infinite ease-in-out;
}

@keyframes growing {
	50% {
		width: 81px;
		height: 81px;
	}
}

div.map {
	width: 100vw;
	height: 100vh;
	overflow: visible;
	transition: transform 500ms ease;
}

div.plane {
	position: absolute;
	width: 2000px;
	height: 2000px;
	top: calc((1000px - 50vh) * -1);
	left: calc((1000px - 50vw) * -1);
	background-image: var(--plane-grid-horizontal), var(--plane-grid-vertical);
	background-size: 16px 16px;
	border-radius: 100%;
	transform-origin: 1000px 1000px;
}

div.ball {
	position: absolute;
	width: 16px;
	height: 16px;
	border-radius: 100%;
	background-color: var(--ball-color);
	box-shadow: 0 0 12px 4px var(--ball-color);
	opacity: 0;
	transition: opacity 500ms;
	cursor: pointer;
}

div.ball:hover::before {
	content: attr(data-coords);
	position: absolute;
	bottom: 150%;
	left: 50%;
	margin-bottom: 5px;
	margin-left: -80px;
	padding: 6px 12px;
	border-radius: 32px;
	background-color: rgba(0, 0, 0, 0.24);
	color: rgba(255, 255, 255, 0.64);
	font-family: system-ui;
	font-weight: 500;
	text-align: center;
	font-size: 12px;
	line-height: 12px;
}

div.arrow {
	position: absolute;
	inset: 0;
	margin: auto;
	width: 20px;
	height: 24px;
	opacity: 0;
	clip-path: polygon(50% 0%, 100% 100%, 50% 81%, 0 100%);
	background-color: var(--arrow-color);
	cursor: pointer;
	transition: transform 500ms ease;
}

div.credits {
	position: fixed;
	inset: 20px;
	top: unset;
	margin: 0 auto;
	padding: 8px 16px 12px 16px;
	font-family: system-ui;
	color: white;
	background: rgba(0, 0, 0, 0.3);
	border-radius: 8px;
	text-align: center;
}