:root {
	--duration: 1s;
}

body {
	margin: 0;
	display: grid;
	background-color: #142020;
	justify-items: center;
	grid-template-rows: auto 1fr;
	height: 100vh;
	width: 100vw;
	overflow: hidden;
}

input {
	width: 99%;
}

main {
	margin: 0;
	width: 100%;
	height: 100%;
	position: relative;
}

.ball {
	--size: 32px;
	position: absolute;
	height: var(--size);
	width: var(--size);
	border-radius: calc(var(--size) / 2);
	display: flex;
	text-align: center;
	flex-direction: column;
	justify-content: center;
	user-select: none;
	translate: -50% -50%;
}

#controlling {
	background-color: cyan;
	transition-property: top, left;
	transition-duration: var(--duration);
	transition-timing-function: ease-in-out;
	left: 50%;
	top: 50%;
}

.goal {
	background-color: lime;
	transition-property: opacity;
	transition-timing-function: cubic-bezier(0.74, 0.13, 0.66, 0.73);
	transition-duration: var(--duration);
	opacity: 1;
}

.target {
	opacity: 0;
	outline: 4px white solid;
}