html, body {
	width: 100%;
	height: 100%;
	margin: 0;
	overflow: hidden;
	background: linear-gradient(to bottom right, #673AB7, #3F51B5, #489FB6);
	font-family: 'Raleway', sans-serif;
}
.bg-1, .bg-2 {
	position: absolute;
	left: 0;
	width: 350px;
	margin: auto;
	right: 0;
	height: 50%;
}
.bg-1 .list,.bg-2 .list {
	width: 60px;
	height: 100%;
	background: red;
	display: inline-block;
	margin: 0 5px;
}
.bg-1,.bg-2 {
	perspective: 200px;
}
.bg-1 {
	perspective-origin: bottom center;
}
.bg-2 {
	perspective-origin: top center;
}
.bg-2 {
	bottom: 0;
}
.bg-1 .list {
	<!-- transform: rotateX(-30deg); -->
	transform-origin: bottom center;
	background: linear-gradient(to bottom, rgba(0, 0, 0, 0) 55%, rgba(255, 255, 255, .1), rgba(0, 0, 0, 0));
	animation: animation-bg-a 8s ease-in-out infinite;
}
.bg-2 .list {
	<!-- transform: rotateX(30deg); -->
	transform-origin: top center;
	background: linear-gradient(to top, rgba(0, 0, 0, 0) 55%, rgba(255, 255, 255, .1), rgba(0, 0, 0, 0));
	animation: animation-bg-b 8s ease-in-out infinite;
}

.main-container {
	width: 500px;
    height: 500px;
	position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    margin: auto;
	background: rgba(255, 255, 255, 0.1);
	border-radius: 25px;
	box-shadow: -4px 4px 4px rgba(0, 0, 0, 0.2);
	text-align: center;
}

#title-container, #operation-container {
	font-weight: 900;
	font-size: 5em;
	text-shadow: 0px 0px 12px #FCCA46;
}

#score-container {
	font-size: 2em;
	margin-top: 30px;
}

#response-container {
	margin-top: 30px;
}

#final-score-container {
	font-weight: 900;
	font-size: 5em;
	text-shadow: 0px 0px 12px #FCCA46;
}

#home {
	margin-top: 80px;
}

.btn-response {
	margin-top: 50px;
	font-size: 2em;
}

.heartbeat-animated {
	animation: heartBeat 4.5s ease-in-out infinite;
}

#highscores-main-container {
	width: 300px;
	height: 400px;
	position: absolute;
	top: 0;
    right: 0;
	margin: 20px 20px 0 0;
	background: rgba(255, 255, 255, 0.1);
	border-radius: 25px;
	box-shadow: -4px 4px 4px rgba(0, 0, 0, 0.2);
}

.highscore-container-title {
	width: 100%;
	font-weight: 700;
	font-size: 2em;
	text-align: center;
}

.highscore-container-level {
	width: 100%;
	margin: 20px 0 0 0
}

.highscore-container-level-title {
	width: 100%;
	font-weight: 700;
	font-size: 1.2em;
	text-align: center;
}

.highscore-container-level-values {
	font-weight: 500;
	text-align: center;
	font-size: 1.1em;
}

.btn-primary {
	--bs-btn-color: #000000;
	--bs-btn-bg: #FCCA46;
	--bs-btn-hover-bg: #69541D;
	--bs-btn-active-bg: #69541D;
	--bs-btn-border-color: #69541D;
    --bs-btn-active-border-color: #69541D;
}

.progress {
	--bs-progress-bar-bg: #FCCA46;
	--bs-progress-bar-transition: width 0s ease;
}

.disabled {
	display: none;
}

#difficulty-picker {
	margin-top: 50px;
}

#play {
	margin-top: 50px;
}

#name-form {
	margin-top: 50px;
}

#play2 {
	margin-top: 50px;
}

@keyframes animation-bg-a {
	0% {
		-webkit-transform: rotateX(-30deg);
		-moz-transform: rotateX(-30deg);
		-ms-transform: rotateX(-30deg);
		-o-transform: rotateX(-30deg);
		transform: rotateX(-30deg);
		transform-origin: bottom center;
	}
	40% {
		-webkit-transform: rotateX(-150deg);
		-moz-transform: rotateX(-150deg);
		-ms-transform: rotateX(-150deg);
		-o-transform: rotateX(-150deg);
		transform: rotateX(-150deg);
		transform-origin: bottom center;
	}
	100% {
		-webkit-transform: rotateX(-30deg);
		-moz-transform: rotateX(-30deg);
		-ms-transform: rotateX(-30deg);
		-o-transform: rotateX(-30deg);
		transform: rotateX(-30deg);
		transform-origin: bottom center;
	}
}

@keyframes animation-bg-b {
	0% {
		-webkit-transform: rotateX(30deg);
		-moz-transform: rotateX(30deg);
		-ms-transform: rotateX(30deg);
		-o-transform: rotateX(30deg);
		transform: rotateX(30deg);
		transform-origin: top center;
	}
	40% {
		-webkit-transform: rotateX(150deg);
		-moz-transform: rotateX(150deg);
		-ms-transform: rotateX(150deg);
		-o-transform: rotateX(150deg);
		transform: rotateX(150deg);
		transform-origin: top center;
	}
	100% {
		-webkit-transform: rotateX(30deg);
		-moz-transform: rotateX(30deg);
		-ms-transform: rotateX(30deg);
		-o-transform: rotateX(30deg);
		transform: rotateX(30deg);
		transform-origin: top center;
	}
}

@keyframes heartBeat {
	0% {
		transform: scale(1);
	}

	6% {
		transform: scale(1.3);
	}

	12% {
		transform: scale(1);
	}

	18% {
		transform: scale(1.3);
	}

	30% {
		transform: scale(1);
	}
}