/* Default settings */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600&display=swap');

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
	font-family: 'Poppins', sans-serif;
}

body {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 100vh;
	background-image: linear-gradient( 109.6deg, rgba(156,252,248,1) 11.2%, rgba(110,123,251,1) 91.1% );
}

/* Main heading of the game */
.wrapper {
	padding: 35px 40px;
	border-radius: 20px;
	background: #000080;
}

.wrapper header {
	display: flex;
	color: #B2B2B2;
	align-items: center;
	justify-content: space-between;
}

header h1 {
	font-size: 1.6rem;
}

header .column {
	display: flex;
	align-items: center;
}

header span {
	font-weight: 500;
	margin-right: 15px;
	font-size: 1.19rem;
}

header input {
	outline: none;
	border-radius: 30px;
}

/* Styling the volume slider */
.volume-slider input {
	accent-color: #fff;
}

/* Adding styling into the checkbox button */
.keys-checkbox input {
	height: 30px;
	width: 60px;
	cursor: pointer;
	appearance: none;
	position: relative;
	background: #4B4B4B
}

.keys-checkbox input::before {
	content: "";
	position: absolute;
	top: 50%;
	left: 5px;
	width: 20px;
	height: 20px;
	border-radius: 50%;
	background: #8c8c8c;
	transform: translateY(-50%);
	transition: all 0.3s ease;
}

.keys-checkbox input:checked::before {
	left: 35px;
	background: #fff;
}

/* CSS styling of the piano keys */
.piano-keys {
	display: flex;
	list-style: none;
	margin-top: 40px;
}

.piano-keys .key {
	cursor: pointer;
	user-select: none;
	position: relative;
	text-transform: uppercase;
}

.piano-keys .black {
	z-index: 2;
	width: 44px;
	height: 140px;
	margin: 0 -22px 0 -22px;
	border-radius: 0 0 5px 5px;
	background: linear-gradient(#333, #000080);
}

.piano-keys .black.active {
	box-shadow: inset -5px -10px 10px rgba(255, 255, 255, 0.1);
	background: linear-gradient(to bottom, #000080, #434343);
}

.piano-keys .white {
	height: 230px;
	width: 70px;
	border-radius: 8px;
	border: 1px solid #000;
	background: linear-gradient(#fff 96%, #eee 4%);
}

.piano-keys .white.active {
	box-shadow: inset -5px 5px 20px rgba(0, 0, 0, 0.2);
	background: linear-gradient(to bottom, #fff 0%, #eee 100%);
}

.piano-keys .key span {
	position: absolute;
	bottom: 20px;
	width: 100%;
	color: #A2A2A2;
	font-size: 1.13rem;
	text-align: center;
}

.piano-keys .key.hide span {
	display: none;
}

.piano-keys .black span {
	bottom: 13px;
	color: #888888;
}

/* Responsiveness for the tablet sized devices */
@media screen and (max-width: 815px) {
	.wrapper {
		padding: 25px;
	}

	header {
		flex-direction: column;
	}

	header :where(h2, .column) {
		margin-bottom: 13px;
	}

	.volume-slider input {
		max-width: 100px;
	}

	.piano-keys {
		margin-top: 20px;
	}

	.piano-keys .key:where(:nth-child(9), :nth-child(10)) {
		display: none;
	}

	.piano-keys .black {
		height: 100px;
		width: 40px;
		margin: 0 -20px 0 -20px;
	}

	.piano-keys .white {
		height: 180px;
		width: 60px;
	}
}

/* Responsiveness for the mobile devices */
@media screen and (max-width: 615px) {

	.piano-keys .key:nth-child(13),
	.piano-keys .key:nth-child(14),
	.piano-keys .key:nth-child(15),
	.piano-keys .key:nth-child(16),
	.piano-keys .key :nth-child(17) {
		display: none;
	}

	.piano-keys .white {
		width: 50px;
	}
}