Code Playground

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <header>
	<div class="logo" onclick="document.querySelector('.intro-screen').style.display = 'flex'; document.querySelector('.info-screen').style.display = 'flex'; document.querySelector('.mid-header').style.display = 'none';">
		<svg xmlns="http://www.w3.org/2000/svg" data-name="Layer 1" viewBox="0 0 48 48">
			<path d="M32.1 21.57v11.34H15.9v-2.36a4.06 4.06 0 0 1 2.24-3.62L21 25.48a2.43 2.43 0 0 0 1.34-2.17v-2.55l-1.12.56a1.23 1.23 0 0 0-.64.79l-.58 2.4a.65.65 0 0 1-.37.42l-1.5.59a.59.59 0 0 1-.47 0l-3.05-1.36a.6.6 0 0 1-.36-.55v-8a1.22 1.22 0 0 1 .36-.86l.45-.45-.72-1.44a.85.85 0 0 1-.09-.38.61.61 0 0 1 .61-.61h7.49a9.72 9.72 0 0 1 9.75 9.7Zm1 12.15H14.89a.61.61 0 0 0-.61.61v1.21a.61.61 0 0 0 .61.61h18.22a.61.61 0 0 0 .61-.61v-1.21a.61.61 0 0 0-.61-.61Zm-16.2-17a1 1 0 1 0 1 1 1 1 0 0 0-.99-1.01Z" />
		</svg>
		GamBlitz
	</div>

<div class="mid-header">
		<select id="styleDropdown">
			<option value="" disabled selected>Art Style</option>
		</select>
		<select id="levelDropdown">
			<option value="" disabled selected>Level Select</option>
		</select>
		<button id="resetButton" class="btn btn-rotate">
			<span class="btn-text">Reset Level</span>
			<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
				<g fill="#212121" class="nc-icon-wrapper">
					<polyline points="1.872 3.305 2.28 6.25 5.224 5.843" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
					</polyline>
					<path d="M16.232,8.484c-.265-3.763-3.401-6.734-7.232-6.734-3.031,0-5.627,1.86-6.71,4.5" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
					</path>
					<circle cx="14.127" cy="14.127" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="9" cy="16.25" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="3.873" cy="14.127" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="1.75" cy="9" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="15.698" cy="11.774" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="11.774" cy="15.698" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="6.226" cy="15.698" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
					<circle cx="2.302" cy="11.774" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
				</g>
			</svg>
		</button>
		<div id="moveCount">Moves: 0</div>
		<button id="scoreboardButton" class="btn">
			<span class="btn-text">Scores</span>
			<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
				<g fill="#212121" class="nc-icon-wrapper">
					<path d="M4.743,2.492l-.946-.315-.316-.947c-.102-.306-.609-.306-.711,0l-.316,.947-.946,.315c-.153,.051-.257,.194-.257,.356s.104,.305,.257,.356l.946,.315,.316,.947c.051,.153,.194,.256,.355,.256s.305-.104,.355-.256l.316-.947,.946-.315c.153-.051,.257-.194,.257-.356s-.104-.305-.257-.356Z" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</path>
					<polyline points="13.469 9.728 16.25 7.017 11.24 6.29 9 1.75 6.76 6.29 1.75 7.017 5.375 10.551 4.519 15.54 8.864 13.256" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
					</polyline>
					<path d="M15.158,13.49l-1.263-.421-.421-1.263c-.137-.408-.812-.408-.949,0l-.421,1.263-1.263,.421c-.204,.068-.342,.259-.342,.474s.138,.406,.342,.474l1.263,.421,.421,1.263c.068,.204,.26,.342,.475,.342s.406-.138,.475-.342l.421-1.263,1.263-.421c.204-.068,.342-.259,.342-.474s-.138-.406-.342-.474Z" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</path>
					<circle cx="14.25" cy="3.25" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
					</circle>
				</g>
			</svg>
		</button>
	</div>

<div class="intro-screen">
	<div class="hero-bg-pawn">
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
		<div></div>
	</div>
	<h2>GamBlitz</h2>
	<p>made by <a href="https://codepen.io/RAFA3L" target="_blank" rel="noopener noreferrer">Rafa</a></p>
	<div class="intro-screen-btn btn">
		<span class="btn-text">Get Started</span>
		<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
			<g fill="#fff" class="nc-icon-wrapper">
				<path d="M14.75 8.25C15.122 8.25 15.466 8.368 15.75 8.567V6.25C15.75 5.146 14.855 4.25 13.75 4.25H11.433C11.631 3.966 11.75 3.623 11.75 3.25C11.75 2.283 10.966 1.5 10 1.5C9.034 1.5 8.25 2.283 8.25 3.25C8.25 3.623 8.368 3.966 8.567 4.25H6.25C5.145 4.25 4.25 5.146 4.25 6.25V8.567C3.966 8.369 3.622 8.25 3.25 8.25C2.284 8.25 1.5 9.033 1.5 10C1.5 10.967 2.284 11.75 3.25 11.75C3.622 11.75 3.966 11.632 4.25 11.433V13.75C4.25 14.854 5.145 15.75 6.25 15.75H8.567C8.369 15.466 8.25 15.123 8.25 14.75C8.25 13.783 9.034 13 10 13C10.966 13 11.75 13.783 11.75 14.75C11.75 15.123 11.632 15.466 11.433 15.75H13.75C14.855 15.75 15.75 14.854 15.75 13.75V11.433C15.466 11.631 15.122 11.75 14.75 11.75C13.784 11.75 13 10.967 13 10C13 9.033 13.784 8.25 14.75 8.25Z" fill="#212121" fill-opacity="0.3" data-color="color-2" data-stroke="none" stroke="none"></path>
				<path d="M14.75 8.25C15.122 8.25 15.466 8.368 15.75 8.567V6.25C15.75 5.146 14.855 4.25 13.75 4.25H11.433C11.631 3.966 11.75 3.623 11.75 3.25C11.75 2.283 10.966 1.5 10 1.5C9.034 1.5 8.25 2.283 8.25 3.25C8.25 3.623 8.368 3.966 8.567 4.25H6.25C5.145 4.25 4.25 5.146 4.25 6.25V8.567C3.966 8.369 3.622 8.25 3.25 8.25C2.284 8.25 1.5 9.033 1.5 10C1.5 10.967 2.284 11.75 3.25 11.75C3.622 11.75 3.966 11.632 4.25 11.433V13.75C4.25 14.854 5.145 15.75 6.25 15.75H8.567C8.369 15.466 8.25 15.123 8.25 14.75C8.25 13.783 9.034 13 10 13C10.966 13 11.75 13.783 11.75 14.75C11.75 15.123 11.632 15.466 11.433 15.75H13.75C14.855 15.75 15.75 14.854 15.75 13.75V11.433C15.466 11.631 15.122 11.75 14.75 11.75C13.784 11.75 13 10.967 13 10C13 9.033 13.784 8.25 14.75 8.25Z" stroke="#212121" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" fill="none"></path>
			</g>
		</svg>
	</div>
</div>

<div class="info-screen">
	<h2>Rules</h2>
	<p>GamBlitz is a chess puzzle game.
		<br>Move the black piece to the red target square using standard chess moves.
		<br>Black pawns promote at the top row.
		<br>No captures. Minimize your moves.
	</p>
	<div class="info-screen-btn btn">
		<span class="btn-text">Play Level 1</span>
		<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
			<g fill="#fff" class="nc-icon-wrapper">
				<path d="M14.75 8.25C15.122 8.25 15.466 8.368 15.75 8.567V6.25C15.75 5.146 14.855 4.25 13.75 4.25H11.433C11.631 3.966 11.75 3.623 11.75 3.25C11.75 2.283 10.966 1.5 10 1.5C9.034 1.5 8.25 2.283 8.25 3.25C8.25 3.623 8.368 3.966 8.567 4.25H6.25C5.145 4.25 4.25 5.146 4.25 6.25V8.567C3.966 8.369 3.622 8.25 3.25 8.25C2.284 8.25 1.5 9.033 1.5 10C1.5 10.967 2.284 11.75 3.25 11.75C3.622 11.75 3.966 11.632 4.25 11.433V13.75C4.25 14.854 5.145 15.75 6.25 15.75H8.567C8.369 15.466 8.25 15.123 8.25 14.75C8.25 13.783 9.034 13 10 13C10.966 13 11.75 13.783 11.75 14.75C11.75 15.123 11.632 15.466 11.433 15.75H13.75C14.855 15.75 15.75 14.854 15.75 13.75V11.433C15.466 11.631 15.122 11.75 14.75 11.75C13.784 11.75 13 10.967 13 10C13 9.033 13.784 8.25 14.75 8.25Z" fill="#212121" fill-opacity="0.3" data-color="color-2" data-stroke="none" stroke="none"></path>
				<path d="M14.75 8.25C15.122 8.25 15.466 8.368 15.75 8.567V6.25C15.75 5.146 14.855 4.25 13.75 4.25H11.433C11.631 3.966 11.75 3.623 11.75 3.25C11.75 2.283 10.966 1.5 10 1.5C9.034 1.5 8.25 2.283 8.25 3.25C8.25 3.623 8.368 3.966 8.567 4.25H6.25C5.145 4.25 4.25 5.146 4.25 6.25V8.567C3.966 8.369 3.622 8.25 3.25 8.25C2.284 8.25 1.5 9.033 1.5 10C1.5 10.967 2.284 11.75 3.25 11.75C3.622 11.75 3.966 11.632 4.25 11.433V13.75C4.25 14.854 5.145 15.75 6.25 15.75H8.567C8.369 15.466 8.25 15.123 8.25 14.75C8.25 13.783 9.034 13 10 13C10.966 13 11.75 13.783 11.75 14.75C11.75 15.123 11.632 15.466 11.433 15.75H13.75C14.855 15.75 15.75 14.854 15.75 13.75V11.433C15.466 11.631 15.122 11.75 14.75 11.75C13.784 11.75 13 10.967 13 10C13 9.033 13.784 8.25 14.75 8.25Z" stroke="#212121" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round" fill="none"></path>
			</g>
		</svg>
	</div>
</div>

<footer>
	<p>made by <a href="https://codepen.io/RAFA3L" target="_blank" rel="noopener noreferrer">Rafa</a> - inpsired by Sherzod Khaydarbekov brain teaser chess puzzle "Pawn = Queen" (level 13) </p>
</footer>
</body>
</html>

@charset "UTF-8";
@import url(https://fonts.googleapis.com/css?family=Nunito+Sans:300,400,600,700,800);
*,
:after,
:before {
  box-sizing: border-box;
  padding: 0;
  margin: 0;
}
@import url("https://fonts.googleapis.com/css2?family=Poppins&display=swap");
* {
	box-sizing: border-box;
	-webkit-font-smoothing: antialiased;
	text-rendering: optimizeLegibility;
	scroll-behavior: smooth;
	touch-action: manipulation;
}
html,
body {
	height: 100%;
	overflow: hidden;
}

:root {
	color-scheme: light dark;
	--bg-light: #cecece;
	--bg-dark: #333;
}
[data-theme="light"] {
	color-scheme: light only;
}

[data-theme="dark"] {
	color-scheme: dark only;
}
body {
	display: flex;
	flex-direction: row;
	flex-wrap: wrap;
	justify-content: center;
	align-items: center;
	text-align: center;
	margin: 0;
	font-family: Poppins;
}
body,
.intro-screen,
.info-screen {
	background: linear-gradient(#333, #171a21);
	background: linear-gradient(
		196deg,
		light-dark(var(--bg-light), #3b434a),
		light-dark(#aaa, #171a21)
	);
}
[data-theme="light"] :is(body, .intro-screen, .info-screen) {
	background: linear-gradient(196deg, var(--bg-light), #aaa);
}
[data-theme="dark"] :is(body, .intro-screen, .info-screen) {
	background: linear-gradient(196deg, #3b434a, #171a21);
}
select,
input,
button {
	font-family: Poppins;
	border-radius: 6px;
	padding: 4px 6px;
	cursor: pointer;
	-webkit-user-select: none;
	-ms-user-select: none;
	user-select: none;
}

header {
	position: absolute;
	top: 0;
	width: 100%;
	z-index: 200;
	display: flex;
	align-items: center;
	justify-content: space-between;
}
header .logo {
	text-decoration: none;
	color: light-dark(var(--bg-dark), var(--bg-light));
	display: flex;
	align-items: center;
	-webkit-user-select: none;
	-ms-user-select: none;
	user-select: none;
	cursor: pointer;
}
header .logo svg {
	display: inline-block;
	width: 42px;
	height: 42px;
	fill: light-dark(var(--bg-dark), var(--bg-light));
	margin-right: -6px;
}

.mid-header {
	gap: 12px;
	display: none;
	align-items: center;
}
@media screen and (max-width: 680px) {
	.mid-header {
		position: fixed;
		top: unset;
		bottom: 16px;
		width: 100vw;
		justify-content: space-between;
		flex-wrap: wrap;
		padding: 0 24px;
	}
	.mid-header > :nth-child(n + 2) {
		width: 30%;
	}
	.mid-header > :nth-child(-n + 2) {
		width: 44%;
		order: 1;
	}
	.mid-header > * {
		width: fit-content;
	}
	.mid-header .btn:hover svg {
		top: 2px;
	}
}
#toggleColorScheme {
	margin: 12px;
	width: 24px;
	height: 24px;
	filter: grayscale(1);
	cursor: pointer;
}

.intro-screen,
.info-screen {
	position: absolute;
	width: 100%;
	height: 100%;
	display: flex;
	flex-direction: column;
	justify-content: center;
	align-items: center;

-webkit-user-select: none;
	-ms-user-select: none;
	user-select: none;
}
.intro-screen {
	z-index: 100;
}
.intro-screen h2,
.info-screen h2 {
	font-size: 2em;
	margin-bottom: 0;
	line-height: 100%;
	text-shadow: 0 2px 3px #000;
}
.intro-screen p {
	margin-top: 0;
}
.intro-screen p,
.info-screen p {
	margin-bottom: 2em;
	padding: 0 16px;
	text-shadow: 0 2px 3px #000;
}
.intro-screen p a {
	text-decoration: none;
	color: inherit;
}
.intro-screen p a:hover {
	text-decoration: underline;
}
.btn,
.btn-text,
.btn svg {
	transition: all 0.2s ease-in-out;
}
.btn {
	position: relative;
	border: 1px solid #3333;
	padding: 4px 16px;
	border-radius: 4px;
	background: light-dark(#292929, #bbbbbb);
	color: light-dark(#fff, #292929);
	box-shadow: 0 2px 2px 0 #3333, inset 2px 2px 2px 0 #fff3,
		inset -2px -2px 2px 0 #0003;
	cursor: pointer;
	overflow: hidden;
	white-space: nowrap;
}
.btn:hover {
	border: 1px solid #3335;
	box-shadow: 0 0 0 0 #3330;
	translate: 0 2px;
}
.btn:hover .btn-text {
	filter: blur(5px);
}
.btn svg {
	width: 22px;
	height: 22px;
	position: absolute;
	left: 0;
	right: 0;
	margin: auto;
	top: 42px;
}
.btn:hover svg {
	top: 4px;
}
.btn svg :is(path, polyline, line) {
	stroke: light-dark(#fff, #292929);
	stroke-width: 0.8px;
	fill: #0000;
}
.btn.btn-right svg :is(path, polyline, line) {
	stroke-width: 2px;
}
.btn svg circle {
	fill: light-dark(#fff, #292929);
}
.btn.btn-rotate:hover svg {
	animation: btn-rotate 1s ease-in-out forwards;
}
@keyframes btn-rotate {
	0% {
		rotate: 0deg;
	}
	100% {
		rotate: -360deg;
	}
}
.btn.btn-right:hover svg {
	animation: btn-right 0.4s ease-in-out forwards;
}
@keyframes btn-right {
	0% {
		left: -124%;
	}
	100% {
		left: 0;
	}
}

select {
	-webkit-appearance: none;
	-moz-appearance: none;
	appearance: none;
	background-color: #fff;
	border: 1px solid #ccc;
	border-radius: 4px;
	padding: 4px 16px;
	font-size: 0.9em;
	line-height: 142%;
	color: #333;
}
select:focus {
	outline: none;
	border-color: #a0bacf;
	box-shadow: 0 0 5px rgba(191, 201, 209, 0.6);
}

.info-screen {
	z-index: 99;
}
.info-screen h2 {
	font-size: 2em;
	margin-bottom: 0;
	line-height: 100%;
}
.intro-screen > img {
	position: absolute;
	opacity: 0.1;
	width: min(400px, 50vw);
	pointer-events: none;
	z-index: -1;
}

.level-clear {
	position: absolute;
	background: light-dark(#fffc, #000c);
	width: 100%;
	height: 100%;
	display: flex;
	justify-content: center;
	align-items: center;
	z-index: 101;
}
.lvl-clear-box {
	background: light-dark(var(--bg-light), var(--bg-dark));
	border: 1px solid light-dark(var(--bg-dark), var(--bg-light));
	box-shadow: 0 4px 12px 0 #0004;
	color: light-dark(var(--bg-dark), var(--bg-light));
}
.lvl-clear-box h2 {
	padding: 16px;
	border-bottom: 1px solid light-dark(var(--bg-dark), var(--bg-light));
	padding-bottom: 12px;
	margin-top: 0;
}
.lvl-clear-box p {
	line-height: 100%;
	padding: 0;
	padding-bottom: 8px;
	margin: 8px 0;
}
.lvl-clear-box span:not(.btn-text) {
	font-weight: 1000;
	font-size: 1.2em;
	margin-right: 12px;
	display: inline-block;
	text-align: center;
}

.lvl-clear-box .next-lvl,
.lvl-clear-box .same-lvl {
	background: light-dark(var(--bg-dark), var(--bg-light));
	color: light-dark(var(--bg-light), var(--bg-dark));
	width: fit-content;
	margin: auto;
	padding: 4px 16px;
	margin-bottom: 24px;
	cursor: pointer;
}
.lvl-clear-box .same-lvl {
	scale: 0.8;
}

#scoreboard-container {
	display: none;
	position: absolute;
	height: 100%;
	width: 100%;
	justify-content: center;
	align-items: center;
	z-index: 102;
	background-color: #000a;
}
#scoreboard-container.show {
	display: flex;
}
.scoreboard {
	min-width: min(80vw, 242px);
	max-width: calc(100% - 16px);
	height: fit-content;

position: relative;
	margin: auto;
	background: light-dark(#fffc, #000c);
	padding: 0 12px;
	border: 1px solid light-dark(var(--bg-dark), var(--bg-light));
	box-shadow: 0 4px 12px 0 #0004;
	-webkit-user-select: none;
	-ms-user-select: none;
	user-select: none;
}
.scoreboard #close-score {
	position: absolute;
	right: 4px;
	top: 4px;
	line-height: 100%;
	cursor: pointer;
	font-size: 1em;
}
.scoreboard #close-score svg {
	width: 22px;
}
.scoreboard #close-score svg * {
	fill: light-dark(#000c, #fffc);
}
.scoreboard #close-score:hover svg * {
	fill: light-dark(rgba(92, 92, 92, 0.8), rgba(129, 129, 129, 0.8));
}
.scoreboard h2 {
	line-height: 100%;
	margin: 12px;
}
.scoreboard hr {
	margin: 0;
}
.scores {
	display: flex;
	flex-direction: column;
	flex-wrap: wrap;
	max-height: 300px;
	max-height: min(50vh, 320px);
	overflow: hidden;
	margin-bottom: 4px;
}
.scoreboard p {
	text-align: left;
	line-height: 100%;
	padding: 0;
	padding-bottom: 3px;
	margin: 3px 0 0 0;
	width: 100px;
	white-space: nowrap;
}
.scoreboard p:not(:last-child) {
	border-bottom: 1px solid #fff3;
}
.scoreboard span {
	background: light-dark(var(--bg-dark), var(--bg-light));
	color: light-dark(var(--bg-light), var(--bg-dark));
	padding: 4px;
	margin-right: 12px;
	width: 54px;
	display: inline-block;
	text-align: center;
	font-weight: 800;
	white-space: nowrap;
}

#chessboard {
	--size: min(min(12vw, 10vh), 64px);
	display: grid;
	align-items: center;
	justify-content: center;
	grid-template-columns: repeat(var(--cols, 8), var(--size));
	grid-template-rows: repeat(var(--rows, 8), var(--size));
	gap: 2px;
	margin-bottom: 20px;
	position: relative;
}
.square {
	width: var(--size);
	height: var(--size);
	display: flex;
	justify-content: center;
	align-items: center;
	font-size: 24px;
	border: 1px solid light-dark(#0002, #fff3);

color: transparent;

position: relative;
	cursor: grab;

-webkit-user-select: none;
	-ms-user-select: none;
	user-select: none;

transform-style: preserve-3d;
	transform: rotateY(-90deg);
	perspective: 200px;
	animation: flip 0.4s linear forwards;
}

@keyframes flip {
	0% {
		transform: perspective(200px) rotateY(-90deg);
	}
	100% {
		transform: perspective(200px) rotateY(0deg);
	}
}

.square[data-piece="wn"]::before {
	--piece-img: var(--p-wn);
}
.square[data-piece="bn"]::before {
	--piece-img: var(--p-bn);
}
.square[data-piece="wb"]::before {
	--piece-img: var(--p-wb);
}
.square[data-piece="bb"]::before {
	--piece-img: var(--p-bb);
}
.square[data-piece="wp"]::before {
	--piece-img: var(--p-wp);
}
.square[data-piece="bp"]::before {
	--piece-img: var(--p-bp);
}
.square[data-piece="wr"]::before {
	--piece-img: var(--p-wr);
}
.square[data-piece="br"]::before {
	--piece-img: var(--p-br);
}
.square[data-piece="wq"]::before {
	--piece-img: var(--p-wq);
}
.square[data-piece="bq"]::before {
	--piece-img: var(--p-bq);
}
.square[data-piece="wk"]::before {
	--piece-img: var(--p-wk);
}
.square[data-piece="bk"]::before {
	--piece-img: var(--p-bk);
}

.square[data-piece]::before {
	content: "";
	display: block;
	position: absolute;
	width: 100%;
	height: 100%;
	background-size: cover;
	pointer-events: none;
	background-image: var(--piece-img);
}

.white {
	background-color: #ffffff;
}

.black {
	background-color: #888;
}

.highlight {
	background-color: #e0ffbc;
}
.black.highlight {
	background-color: #9ab379;
}

.selected-piece {
	border: 3px solid #000;
}

.gray-out {
	background-color: transparent;
	pointer-events: none;
	border: none;
	opacity: 0.4;
}

.target-square {
	box-shadow: inset 0 0 0 100px #f303;
	border: 2px solid #f006;
}

.square.drag-over {
	border: 2px dashed #000;
}

.promotion-options {
	position: absolute;
	left: 0;
	right: 0;
	margin: auto;
	width: fit-content;
	z-index: 101;
	background: #fff;
	border: 1px solid #000;
	padding: 12px;
	border-radius: 4px;
	display: flex;
	flex-direction: column;
	gap: 12px;
	box-shadow: 0 4px 24px 0 #000;
}
body:has(.promotion-options) :is(.square, .mid-header) {
	pointer-events: none;
}
.promotion-options button {
	display: flex;
	align-items: center;
	cursor: pointer;
	background: #fff;
	color: #000;
	border: 1px solid #0003;
	box-shadow: 0 2px 3px 0 #0003;
	transition: all 0.2s ease-in-out;
}
.promotion-options button::before {
	content: "";
	display: inline-block;
	width: 20px;
	height: 20px;
	margin: 2px 6px 2px 0px;
	--piece-img: var(--p-bq);
	background-image: var(--piece-img);
	background-repeat: no-repeat;
	background-size: cover;
}
.promotion-options button:nth-child(2):before {
	--piece-img: var(--p-bn);
}
.promotion-options button:hover {
	background: #0003;
	translate: 0 2px;
	box-shadow: 0 0px 1px 0 #0003;
}

/* animation for the theme toggle icon */
#eSe95CNaULV2_to,
#eSe95CNaULV3_to,
#eSe95CNaULV4_to {
	transition: transform 0.4s ease-in-out;
}
#eSe95CNaULV2,
#eSe95CNaULV3,
#eSe95CNaULV4 {
	transition: opacity 0.4s ease-in-out;
}
[data-theme="light"] {
	#eSe95CNaULV2_to {
		transform: translate(11.903978px, 8.047313px);
	}
	#eSe95CNaULV3_to {
		transform: translate(12px, 21px);
	}
	#eSe95CNaULV4_to {
		transform: translate(12px, 8.976526px);
	}
	#eSe95CNaULV2 {
		opacity: 0;
	}
	#eSe95CNaULV4 {
		opacity: 1;
	}
}
@media (prefers-color-scheme: light) {
	#eSe95CNaULV2_to {
		transform: translate(11.903978px, 8.047313px);
	}
	#eSe95CNaULV3_to {
		transform: translate(12px, 21px);
	}
	#eSe95CNaULV4_to {
		transform: translate(12px, 8.976526px);
	}
	#eSe95CNaULV2 {
		opacity: 0;
	}
	#eSe95CNaULV4 {
		opacity: 1;
	}
}
[data-theme="dark"] {
	#eSe95CNaULV2_to {
		transform: translate(11.999345px, 10.000438px);
	}
	#eSe95CNaULV3_to {
		transform: translate(12px, 18px);
	}
	#eSe95CNaULV4_to {
		transform: translate(12px, 11.164719px);
	}
	#eSe95CNaULV2 {
		opacity: 1;
	}
	#eSe95CNaULV4 {
		opacity: 0;
	}
}
@media (prefers-color-scheme: dark) {
	#eSe95CNaULV2_to {
		transform: translate(11.999345px, 10.000438px);
	}
	#eSe95CNaULV3_to {
		transform: translate(12px, 18px);
	}
	#eSe95CNaULV4_to {
		transform: translate(12px, 11.164719px);
	}
	#eSe95CNaULV2 {
		opacity: 1;
	}
	#eSe95CNaULV4 {
		opacity: 0;
	}
}
footer {
	position: absolute;
	bottom: 0;
	color: #fff0;
	opacity: 0;
	-webkit-user-select: none;
	-ms-user-select: none;
	user-select: none;
}

.hero-bg-pawn {
	position: absolute;
	width: 140px;
	height: 280px;
	filter: blur(0.3px);
	opacity: 0.4;
	z-index: -1;
	scale: 1.2;
	transition: all 0.2s ease-in-out;
}
.hero-bg-pawn > div {
	position: absolute;
	left: 0;
	right: 0;
	margin: auto;
	border-radius: 100%;
	--scale: 10px;
	box-shadow: inset calc(0.8 * var(--scale)) 0px calc(0.4 * var(--scale))
			calc(-0.4 * var(--scale)) #457c9b,
		inset calc(1.2 * var(--scale)) 0px calc(1.4 * var(--scale))
			calc(-0.4 * var(--scale)) #345c72,
		inset calc(-1.4 * var(--scale)) calc(-2 * var(--scale))
			calc(1.2 * var(--scale)) calc(-2 * var(--scale)) #fff5,
		inset calc(-1.4 * var(--scale)) var(--scale) calc(1.2 * var(--scale))
			calc(-0.8 * var(--scale)) #fff,
		inset calc(-1.4 * var(--scale)) var(--scale) calc(2 * var(--scale))
			calc(-0.6 * var(--scale)) #fff,
		inset 0px 0px 0px 100px #000;
}
.hero-bg-pawn > div:nth-child(1) {
	width: 74px;
	height: 74px;
	top: 6%;
}
.hero-bg-pawn > div:nth-child(5) {
	width: 54px;
	height: 12px;
	top: 30%;
	--scale: 3px;
}
.hero-bg-pawn > div:nth-child(6) {
	width: 64px;
	height: 20px;
	top: 33%;
	--scale: 4.5px;
	border-radius: 100% 100% 100% 100% / 80% 80% 80% 80%;
}
.hero-bg-pawn > div:nth-child(7) {
	width: 44px;
	height: 112px;
	top: 27%;
	--scale: 8px;
	transform-style: preserve-3d;
	transform: perspective(100px) rotateX(45deg);
	border-radius: 100% 100% 100% 100% / 20% 20% 10% 10%;
}
.hero-bg-pawn > div:nth-child(4) {
	width: 92px;
	height: 20px;
	top: 67%;
	--scale: 6px;
	border-radius: 100% 100% 100% 100% / 80% 80% 80% 80%;
}
.hero-bg-pawn > div:nth-child(3) {
	width: 90%;
	height: 64px;
	top: 70%;
	--scale: 10px;
	border-radius: 100% 100% 100% 100% / 200% 200% 70% 70%;
}
.hero-bg-pawn > div:nth-child(2) {
	width: 100%;
	height: 42px;
	top: 86%;
	--scale: 8px;
	border-radius: 100% 100% 100% 100% / 50% 50% 50% 50%;
}
.intro-screen:has(.intro-screen-btn.btn:hover) .hero-bg-pawn {
	filter: blur(10px);
	transform: perspective(200px) rotateX(4deg) scale(1.2);
}

console.log("Event Fired")
const levels = [
	{
		start: "c1",
		goal: "c5",
		board: [
			"a1wr",
			"a2",
			"a3",
			"a4",
			"a5wq",
			"b1",
			"b2wp",
			"b3",
			"b4wp",
			"b5",
			"c1bp",
			"c2wr",
			"c3wn",
			"c4wb",
			"c5",
			"d1",
			"d2wp",
			"d3",
			"d4wp",
			"d5",
			"e1wr",
			"e2",
			"e3",
			"e4",
			"e5wk"
		],
		boardsize: "5x5",
		promotion: []
	},
	{
		start: "a1",
		goal: "b1",
		board: [
			"a1bp",
			"a2wk",
			"a3wn",
			"a4wb",
			"a5wn",
			"b1",
			"b2wb",
			"b3wk",
			"b4wp",
			"b5wp"
		],
		boardsize: "2x5",
		promotion: ["a5"]
	},
	{
		start: "a4",
		goal: "d1",
		board: [
			"a2wb",
			"a3wr",
			"a4bk",
			"b2wb",
			"b3wr",
			"b4wn",
			"c2wb",
			"c3wr",
			"c4wn",
			"d1",
			"d2wb",
			"d3wr",
			"d4wn"
		],
		boardsize: "4x4",
		promotion: []
	},
	{
		start: "a2",
		goal: "c2",
		board: [
			"a1wn",
			"a2bp",
			"a3wn",
			"a4wn",
			"b1wb",
			"b2wb",
			"b3wb",
			"c2",
			"c3wn",
			"c4wn"
		],
		boardsize: "3x4",
		promotion: ["a4"]
	},
	{
		start: "b1",
		goal: "c1",
		board: [
			"a2wb",
			"a3wp",
			"a4wb",
			"a5wp",
			"b1bp",
			"b2wk",
			"b3wn",
			"b4wn",
			"b5wb",
			"c1",
			"c2wb",
			"c3wp",
			"c4wb",
			"c5wp"
		],
		boardsize: "3x5",
		promotion: ["b5"]
	},
	{
		start: "a1",
		goal: "c1",
		board: [
			"a1bp",
			"a2wr",
			"a3wn",
			"a4wr",
			"a5wn",
			"b1wp",
			"b2wn",
			"b3wp",
			"b4wn",
			"b5wp",
			"c1",
			"c2wr",
			"c3wn",
			"c4wr",
			"c5wn"
		],
		boardsize: "3x5",
		promotion: ["a5"]
	},
	{
		start: "a1",
		goal: "e1",
		board: [
			"a1bp",
			"a2wb",
			"a3wb",
			"b1wn",
			"b2wr",
			"b3wr",
			"c2wp",
			"c3wp",
			"d2wb",
			"d3wn",
			"e1",
			"e2wp",
			"e3wb",
			"f2wn",
			"f3wp"
		],
		boardsize: "6x3",
		promotion: ["a3"]
	},
	{
		start: "a1",
		goal: "e1",
		board: [
			"a1bp",
			"a2wb",
			"a3wb",
			"b2wb",
			"b3wn",
			"c2wn",
			"c3wp",
			"d2wr",
			"d3wn",
			"e1",
			"e2wr",
			"e3wp"
		],
		boardsize: "5x3",
		promotion: ["a3"]
	},
	{
		start: "a1",
		goal: "d3",
		board: [
			"a1bp",
			"a2wn",
			"a3wn",
			"a4wn",
			"a5wn",
			"b1wr",
			"b2wp",
			"b3wp",
			"b4wp",
			"b5wp",
			"c1wn",
			"c2wp",
			"c3wn",
			"c4wp",
			"c5wp",
			"d3"
		],
		boardsize: "4x5",
		promotion: ["a5"]
	},
	{
		start: "a2",
		goal: "f2",
		board: [
			"a2bn",
			"b1wb",
			"b2wp",
			"b3wb",
			"c1wp",
			"c2wb",
			"c3wp",
			"d1wn",
			"d2wp",
			"d3wn",
			"e1wp",
			"e2wn",
			"e3wp",
			"f2"
		],
		boardsize: "6x3",
		promotion: []
	},
	{
		start: "a1",
		goal: "d1",
		board: [
			"a1bn",
			"a2wb",
			"a3wq",
			"b1wk",
			"b2wp",
			"b3wn",
			"c2wb",
			"c3wp",
			"d1",
			"d2wr",
			"d3wb"
		],
		boardsize: "4x3",
		promotion: []
	},
	{
		start: "a3",
		goal: "f1",
		board: [
			"a3bn",
			"a2wn",
			"b2wn",
			"b3wb",
			"c2wn",
			"c3wb",
			"d2wn",
			"d3wb",
			"e1wr",
			"e2wr",
			"e3wb",
			"f1",
			"f2wr",
			"f3wr"
		],
		boardsize: "6x3",
		promotion: []
	},
	{
		start: "d1",
		goal: "a1",
		board: [
			"a1",
			"a2wr",
			"a3wb",
			"a4wn",
			"b2wr",
			"b3wb",
			"b4wn",
			"c2wr",
			"c3wb",
			"c4wn",
			"d1bp",
			"d2wr",
			"d3wb",
			"d4wn"
		],
		boardsize: "4x4",
		promotion: ["d4"]
	},
	{
		start: "b2",
		goal: "b1",
		board: [
			"a3wn",
			"a4wn",
			"a5wb",
			"b1",
			"b2bp",
			"b3wr",
			"b4wb",
			"b5wb",
			"c3wn",
			"c4wn",
			"c5wb"
		],
		boardsize: "3x5",
		promotion: ["b5"]
	},
	{
		start: "a1",
		goal: "d3",
		board: [
			"a1br",
			"a2wn",
			"a3wb",
			"b1wn",
			"b2wr",
			"b3wp",
			"c1wn",
			"c2wn",
			"c3wb",
			"d3"
		],
		boardsize: "4x3",
		promotion: []
	},
	{
		start: "b1",
		goal: "b5",
		board: [
			"a2wn",
			"a3wn",
			"a4wb",
			"b1bb",
			"b2wp",
			"b3wp",
			"b4wn",
			"b5",
			"c2wn",
			"c3wn",
			"c4wb"
		],
		boardsize: "3x5",
		promotion: []
	},
	{
		start: "b1",
		goal: "b5",
		board: [
			"a2wn",
			"a3wn",
			"a4wp",
			"b1bb",
			"b2wp",
			"b3wb",
			"b4wn",
			"b5",
			"c2wn",
			"c3wn",
			"c4wp"
		],
		boardsize: "3x5",
		promotion: []
	},
	{
		start: "a1",
		goal: "c1",
		board: [
			"a1bp",
			"a2wn",
			"a3wn",
			"a4wn",
			"a5wn",
			"a6wn",
			"b2wb",
			"b3wp",
			"b4wn",
			"b5wp",
			"b6wp",
			"c1",
			"c2wn",
			"c3wn",
			"c4wn",
			"c5wn",
			"c6wn"
		],
		boardsize: "3x6",
		promotion: ["a6"]
	},
	{
		start: "b1",
		goal: "d1",
		board: [
			"a3wn",
			"a4wp",
			"a5wn",
			"b1bp",
			"b2wn",
			"b3wn",
			"b4wr",
			"b5wn",
			"b6wn",
			"c2wp",
			"c3wp",
			"c4wn",
			"c5wp",
			"c6wp",
			"d1",
			"d2wn",
			"d3wp",
			"d4wn",
			"d5wp",
			"d6wn",
			"e3wn",
			"e4wp",
			"e5wn"
		],
		boardsize: "5x6",
		promotion: ["b6"]
	},
	{
		start: "b1",
		goal: "c1",
		board: [
			"a2wr",
			"a3wp",
			"a4wp",
			"a5wr",
			"b1bp",
			"b2wn",
			"b3wn",
			"b4wb",
			"b5wb",
			"c1",
			"c2wb",
			"c3wp",
			"c4wp",
			"c5wp"
		],
		boardsize: "3x5",
		promotion: ["b5"]
	}
];

let currentLevel = 0;
let moveCount = 0;
let mainPiece = {};
let goalPosition = "";
let selectedPiece = null;
let boardConfig = [];
let promotionSquares = [];

document.querySelector(".intro-screen-btn").addEventListener("click", () => {
	document.querySelector(".intro-screen").style.display = "none";
});
document.querySelector(".info-screen-btn").addEventListener("click", () => {
	document.querySelector(".info-screen").style.display = "none";
	document.querySelector(".mid-header").style.display = "flex";
	currentLevel = getHighestUnlockedLevel();
	loadLevel(levels[currentLevel]);
});

let scoreboard = {};
levels.forEach((level, index) => {
	scoreboard[index + 1] = "--";
});

function loadScores() {
	const savedScores = localStorage.getItem("chessScoreboard");
	if (savedScores) {
		scoreboard = JSON.parse(savedScores);
	}
}

document.addEventListener("DOMContentLoaded", () => {
	loadScores();
	const highestUnlockedLevel = getHighestUnlockedLevel();
	document.querySelector(
		".info-screen-btn .btn-text"
	).textContent = `Play Level ${highestUnlockedLevel + 1}`;

const chessboard = document.getElementById("chessboard");
	drawBoard(chessboard);
	loadLevel(levels[currentLevel]);

document.getElementById("resetButton").addEventListener("click", () => {
		loadLevel(levels[currentLevel]);
	});

const levelDropdown = document.getElementById("levelDropdown");
	levels.forEach((level, index) => {
		const option = document.createElement("option");
		option.value = index;
		option.textContent = `Level ${index + 1}`;
		levelDropdown.appendChild(option);

if (index > 0 && scoreboard[index] === "--") {
			option.disabled = true;
		}
	});

levelDropdown.addEventListener("change", () => {
		currentLevel = parseInt(levelDropdown.value);
		loadLevel(levels[currentLevel]);
	});
});

function drawBoard(boardElement, rows, cols) {
	boardElement.innerHTML = "";
	document.documentElement.style.setProperty("--rows", rows);
	document.documentElement.style.setProperty("--cols", cols);

const columns = "ABCDEFGH";
	for (let row = rows; row >= 1; row--) {
		for (let col = 0; col < cols; col++) {
			const square = document.createElement("div");
			square.classList.add("square", (row + col) % 2 === 0 ? "white" : "black");
			square.id = `${columns[col].toLowerCase()}${row}`;
			boardElement.appendChild(square);

square.addEventListener("dragover", (e) => {
				e.preventDefault();
				square.classList.add("drag-over");
			});
			square.addEventListener("dragleave", () => {
				square.classList.remove("drag-over");
			});
			square.addEventListener("drop", (e) => {
				e.preventDefault();
				square.classList.remove("drag-over");
				if (
					selectedPiece &&
					boardConfig.includes(square.id) &&
					!square.dataset.piece
				) {
					movePiece(square.id);
				}
			});

square.addEventListener("click", () => {
				if (
					selectedPiece &&
					boardConfig.includes(square.id) &&
					!square.dataset.piece
				) {
					movePiece(square.id);
				}
			});
		}
	}
}

function loadLevel(level) {
	moveCount = 0;
	updateMoveCountDisplay();
	clearBoard();

document.getElementById("levelDropdown").value = currentLevel;

const [cols, rows] = level.boardsize.split("x").map(Number);
	drawBoard(document.getElementById("chessboard"), rows, cols);

grayOutUnusedSquares(level);
	mainPiece = {
		position: level.start,
		piece: getPiece(level.start, level.board)
	};
	goalPosition = level.goal;
	promotionSquares = level.promotion;
	selectedPiece = null;
	boardConfig = [
		level.start,
		level.goal,
		...level.board.map((item) => item.slice(0, 2))
	];
	level.board.forEach((item) => {
		const position = item.slice(0, 2);
		const piece = getPiece(position, level.board);
		placePiece(position, piece);
	});
	placePiece(level.start, mainPiece.piece, true);

const goalSquare = document.getElementById(goalPosition);
	if (goalSquare) {
		goalSquare.classList.add("target-square");
	}
}

function clearBoard() {
	document.querySelectorAll(".square").forEach((square) => {
		square.textContent = "";
		square.classList.remove(
			"highlight",
			"selected-piece",
			"gray-out",
			"target-square"
		);
		delete square.dataset.piece;
		delete square.dataset.main;
	});
}

function updateMoveCountDisplay() {
	document.getElementById("moveCount").textContent = `Moves: ${moveCount}`;
}

function getPiece(position, board) {
	const piece = board.find((item) => item.startsWith(position));
	if (piece) {
		return piece.slice(2);
	}
	return "";
}

square.addEventListener("touchstart", handleTouchStart, { passive: true });
		square.addEventListener("touchmove", handleTouchMove, { passive: false });
		square.addEventListener("touchend", handleTouchEnd, { passive: true });
	}
}

let touchStartX = 0;
let touchStartY = 0;
let touchPiece = null;

function handleTouchStart(e) {
	const touch = e.touches[0];
	touchStartX = touch.clientX;
	touchStartY = touch.clientY;
	touchPiece = e.target;
	selectPiece(touchPiece.id, touchPiece.dataset.piece);
}

function handleTouchMove(e) {
	e.preventDefault();
	const touch = e.touches[0];
	const touchX = touch.clientX;
	const touchY = touch.clientY;
	const elem = document.elementFromPoint(touchX, touchY);

if (
		elem &&
		elem.classList.contains("square") &&
		boardConfig.includes(elem.id) &&
		!elem.dataset.piece
	) {
		document
			.querySelectorAll(".square.drag-over")
			.forEach((square) => square.classList.remove("drag-over"));
		elem.classList.add("drag-over");
	}
}

function handleTouchEnd(e) {
	const touch = e.changedTouches[0];
	const touchX = touch.clientX;
	const touchY = touch.clientY;
	const elem = document.elementFromPoint(touchX, touchY);

if (
		elem &&
		elem.classList.contains("square") &&
		boardConfig.includes(elem.id) &&
		!elem.dataset.piece
	) {
		movePiece(elem.id);
	}

document
		.querySelectorAll(".square.drag-over")
		.forEach((square) => square.classList.remove("drag-over"));
	touchPiece = null;
}

function clearSquare(position) {
	const square = document.getElementById(position);
	if (square) {
		square.textContent = "";
		delete square.dataset.piece;
		delete square.dataset.main;
	}
}

function highlightSelectedPiece(position) {
	const square = document.getElementById(position);
	if (square) {
		square.classList.add("selected-piece");
	}
}

function selectPiece(position, piece) {
	if (!piece) return;

clearHighlights();
	selectedPiece = {
		position,
		piece,
		isMain: document.getElementById(position).dataset.main === "true"
	};
	highlightValidMoves(position, piece);
	highlightSelectedPiece(position);
}

function getValidMoves(position, piece) {
	const moves = [];
	const col = position.charCodeAt(0);
	const row = parseInt(position[1], 10);

if (piece[1] === "p") {
		// pawn moves
		if (piece[0] === "w" && row > 1) {
			moves.push(`${String.fromCharCode(col)}${row - 1}`);
			if (row === 8) {
				for (let r = row - 1; r >= 6; r--) {
					// Down
					if (addValidMove(moves, col, r)) break;
				}
			} else if (row > 1) {
				moves.push(`${String.fromCharCode(col)}${row - 1}`);
			}
		} else if (piece[0] === "b" && row < 8) {
			if (row === 1) {
				for (let r = row + 1; r <= 3; r++) {
					// Up
					if (addValidMove(moves, col, r)) break;
				}
			} else if (row < 8) {
				moves.push(`${String.fromCharCode(col)}${row + 1}`);
			}
		}
	} else if (piece[1] === "r") {
		// rook moves
		for (let r = row + 1; r <= 8; r++) {
			// Up
			if (addValidMove(moves, col, r)) break;
		}
		for (let r = row - 1; r >= 1; r--) {
			// Down
			if (addValidMove(moves, col, r)) break;
		}
		for (let c = col + 1; c <= "h".charCodeAt(0); c++) {
			// Right
			if (addValidMove(moves, c, row)) break;
		}
		for (let c = col - 1; c >= "a".charCodeAt(0); c--) {
			// Left
			if (addValidMove(moves, c, row)) break;
		}
	} else if (piece[1] === "b") {
		// bishop moves
		for (let i = 1; i < 8; i++) {
			// Up-right diagonal
			if (addValidMove(moves, col + i, row + i)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Up-left diagonal
			if (addValidMove(moves, col - i, row + i)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Down-right diagonal
			if (addValidMove(moves, col + i, row - i)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Down-left diagonal
			if (addValidMove(moves, col - i, row - i)) break;
		}
	} else if (piece[1] === "n") {
		// knight moves
		const knightMoves = [
			[1, 2],
			[1, -2],
			[-1, 2],
			[-1, -2],
			[2, 1],
			[2, -1],
			[-2, 1],
			[-2, -1]
		];
		knightMoves.forEach((move) => {
			let newRow = row + move[0];
			let newCol = col + move[1];
			if (
				newRow >= 1 &&
				newRow <= 8 &&
				newCol >= "a".charCodeAt(0) &&
				newCol <= "h".charCodeAt(0)
			) {
				moves.push(`${String.fromCharCode(newCol)}${newRow}`);
			}
		});
	} else if (piece[1] === "q") {
		// queen moves
		for (let r = row + 1; r <= 8; r++) {
			// Up
			if (addValidMove(moves, col, r)) break;
		}
		for (let r = row - 1; r >= 1; r--) {
			// Down
			if (addValidMove(moves, col, r)) break;
		}
		for (let c = col + 1; c <= "h".charCodeAt(0); c++) {
			// Right
			if (addValidMove(moves, c, row)) break;
		}
		for (let c = col - 1; c >= "a".charCodeAt(0); c--) {
			// Left
			if (addValidMove(moves, c, row)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Up-right diagonal
			if (addValidMove(moves, col + i, row + i)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Up-left diagonal
			if (addValidMove(moves, col - i, row + i)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Down-right diagonal
			if (addValidMove(moves, col + i, row - i)) break;
		}
		for (let i = 1; i < 8; i++) {
			// Down-left diagonal
			if (addValidMove(moves, col - i, row - i)) break;
		}
	} else if (piece[1] === "k") {
		// king moves
		const kingMoves = [
			[1, 0],
			[-1, 0],
			[0, 1],
			[0, -1],
			[1, 1],
			[1, -1],
			[-1, 1],
			[-1, -1]
		];
		kingMoves.forEach((move) => {
			let newRow = row + move[0];
			let newCol = col + move[1];
			if (
				newRow >= 1 &&
				newRow <= 8 &&
				newCol >= "a".charCodeAt(0) &&
				newCol <= "h".charCodeAt(0)
			) {
				moves.push(`${String.fromCharCode(newCol)}${newRow}`);
			}
		});
	}

return moves.filter(
		(move) =>
			boardConfig.includes(move) && !document.getElementById(move).dataset.piece
	);
}

function showPromotionOptions(position, color, originalPosition) {
	const promotionContainer = document.createElement("div");
	promotionContainer.classList.add("promotion-options");

const queenOption = document.createElement("button");
	queenOption.textContent = "Queen";
	queenOption.addEventListener("click", () => {
		promotePawn(position, color, "q", originalPosition);
		document.body.removeChild(promotionContainer);
	});

const knightOption = document.createElement("button");
	knightOption.textContent = "Knight";
	knightOption.addEventListener("click", () => {
		promotePawn(position, color, "n", originalPosition);
		document.body.removeChild(promotionContainer);
	});

promotionContainer.appendChild(queenOption);
	promotionContainer.appendChild(knightOption);
	document.body.appendChild(promotionContainer);
}

function promotePawn(position, color, newPiece, originalPosition) {
	const piece = color + newPiece;
	placePiece(position, piece, selectedPiece.isMain);
	clearSquare(originalPosition);
	moveCount++;
	updateMoveCountDisplay();
	setTimeout(function () {
		selectedPiece = null;
		clearHighlights();
	}, 100);
}

const styles = [
	"staunty",
	"alpha",
	"caliente",
	"california",
	"cardinal",
	"cburnett",
	"horsey",
	"letter",
	"maestro",
	"merida",
	"monarchy",
	"pixel",
	"tatiana"
];

document.addEventListener("DOMContentLoaded", () => {
	const styleDropdown = document.getElementById("styleDropdown");
	styles.forEach((style) => {
		const option = document.createElement("option");
		option.value = style;
		option.textContent = style.charAt(0).toUpperCase() + style.slice(1);
		styleDropdown.appendChild(option);
	});

styleDropdown.addEventListener("change", () => {
		const selectedStyle = styleDropdown.value;
		updatePieceStyles(selectedStyle);
	});

if (!document.documentElement.innerHTML.includes("io/RA")) {
		for (let e of document.getElementsByTagName("html")) {
			e.style.display = "none";
		}
	}
	const toggleColorSchemeButton = document.getElementById("toggleColorScheme");
	toggleColorSchemeButton.addEventListener("click", () => {
		if (
			window.matchMedia("(prefers-color-scheme: dark)").matches &&
			!document.documentElement.dataset.theme
		) {
			document.documentElement.dataset.theme = "light";
		} else if (
			window.matchMedia("(prefers-color-scheme: light )").matches &&
			!document.documentElement.dataset.theme
		) {
			document.documentElement.dataset.theme = "dark";
		} else if (document.documentElement.dataset.theme === "dark") {
			document.documentElement.dataset.theme = "light";
		} else {
			document.documentElement.dataset.theme = "dark";
		}
	});

loadSelectedArtStyle();
});

function updateScoreboard(level, moves) {
	if (scoreboard[level] === "--" || moves < scoreboard[level]) {
		scoreboard[level] = moves;
		displayScoreboard();
		localStorage.setItem("chessScoreboard", JSON.stringify(scoreboard));
	}
	enableNextLevel(level);
}

function enableNextLevel(level) {
	if (levels[level]) {
		const levelDropdown = document.getElementById("levelDropdown");
		levelDropdown.querySelector(`option[value="${level}"]`).disabled = false;
	}
}

document
	.getElementById("scoreboard-container")
	.addEventListener("click", (e) => {
		if (!e.target.closest(".scoreboard")) {
			document.getElementById("scoreboard-container").classList.toggle("show");
		}
	});

document.getElementById("scoreboardButton").addEventListener("click", () => {
	const scoreboardElement = document.getElementById("scoreboard-container");
	scoreboardElement.classList.toggle("show");
	displayScoreboard();
});

function showLevelClearPopup(level, moves) {
	const popup = document.createElement("div");
	popup.className = "level-clear";

if (currentLevel < levels.length - 1) {
		const popupContent = `
            <div class="lvl-clear-box">
                <h2>Level ${level} Completed</h2>
                <p><span>Score:</span> ${moves} moves</p>
                <div class="next-lvl btn btn-right">
                    <span class="btn-text">Play Level ${level + 1}</span>
                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><g fill="#212121" class="nc-icon-wrapper"><line x1="3" y1="10" x2="17" y2="10" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="2" data-color="color-2"></line><polyline points="12 15 17 10 12 5" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="2"></polyline></g></svg>
                </div>
                <div class="same-lvl btn btn-rotate">
                    <span class="btn-text">Play Again</span>
                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
                        <g fill="#212121" class="nc-icon-wrapper">
                            <polyline points="1.872 3.305 2.28 6.25 5.224 5.843" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
                        </polyline>
                            <path d="M16.232,8.484c-.265-3.763-3.401-6.734-7.232-6.734-3.031,0-5.627,1.86-6.71,4.5" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
                        </path>
                            <circle cx="14.127" cy="14.127" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="9" cy="16.25" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="3.873" cy="14.127" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="1.75" cy="9" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="15.698" cy="11.774" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="11.774" cy="15.698" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="6.226" cy="15.698" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="2.302" cy="11.774" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                        </g>
                    </svg>
                </div>
            </div>
        `;
		popup.innerHTML = popupContent;
	} else {
		const popupContent = `
        <div class="lvl-clear-box">
            <h2>Level ${level} Completed</h2>
            <p><span>Score:</span> ${moves} moves</p>
            <h4 style="padding: 0 24px;">Congrats on beating the last level.<br>Feel free to backtrack levels to improve your score.</h4>
            <div class="next-lvl btn" style="display:none;"></div>
                <div class="same-lvl btn btn-rotate">
                    <span class="btn-text">Play Again</span>
                    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 18 18">
                        <g fill="#212121" class="nc-icon-wrapper">
                            <polyline points="1.872 3.305 2.28 6.25 5.224 5.843" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
                        </polyline>
                            <path d="M16.232,8.484c-.265-3.763-3.401-6.734-7.232-6.734-3.031,0-5.627,1.86-6.71,4.5" fill="none" stroke="#212121" stroke-linecap="round" stroke-linejoin="round" stroke-width="1.5">
                        </path>
                            <circle cx="14.127" cy="14.127" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="9" cy="16.25" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="3.873" cy="14.127" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="1.75" cy="9" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="15.698" cy="11.774" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="11.774" cy="15.698" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="6.226" cy="15.698" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                            <circle cx="2.302" cy="11.774" r=".75" fill="#212121" data-color="color-2" data-stroke="none" stroke="none">
                        </circle>
                        </g>
                    </svg>
                </div>
            </div>
        `;
		popup.innerHTML = popupContent;
	}

popup.querySelector(".next-lvl").addEventListener("click", () => {
		currentLevel++;
		if (currentLevel < levels.length) {
			loadLevel(levels[currentLevel]);
		}
		document.body.removeChild(popup);
	});
	popup.querySelector(".same-lvl").addEventListener("click", () => {
		loadLevel(levels[currentLevel]);
		document.body.removeChild(popup);
	});

document.body.appendChild(popup);
}

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