body,
html {
	height: 100vh;
	width: 100vw;
	display: flex;
	justify-content: center;
	align-items: center;
	box-sizing: border-box;
	color: #fff;
}
button {
	outline: none;
	border: 1px #fff solid;
	background: none;
	color: #fff;
	padding: 1rem;
	margin: 5px 10px;
	font-size: 1.1rem;
	font-weight: bold;
	cursor: pointer;
}
body::before {
	content: '';
	display: block;
	height: 100%;
	width: 100%;
	position: fixed;
	left: 0;
	top: 0;
	z-index: -1;
	filter: contrast(0.6) brightness(0.6);
	background: #999 url(../assets/ElementSqare.Half.Size.f7ec.webp) center
		center no-repeat fixed;
	background-size: cover;
	transition: all 0.3s ease-in-out;
}
div.main {
	min-width: 320px;
	height: 90%;
	width: 80%;
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
	border-top: 2px #fff solid;
	border-bottom: 2px #fff solid;
	animation: stretch 1.5s ease;
}
@keyframes stretch {
	0% {
		opacity: 0;
		height: 10px;
		overflow: hidden;
	}
	50% {
		opacity: 1;
		height: 10px;
		overflow: hidden;
	}
}
audio {
	width: 300px !important;
	height: 100px !important;
}
div.btnContainer {
	text-align: center;
}
div.popupOverlay {
	display: none;
}
div.popupOverlay.show {
	background: rgba(255, 255, 255, 0.4);
	height: 100%;
	width: 100%;
	position: fixed;
	top: 0;
	left: 0;
	z-index: 3;
	display: flex;
	justify-content: center;
	align-items: center;
	flex-direction: column;
	animation: fadeIn 0.5s ease;
}
div.popupOverlay.show::after {
	content: '点击区域外任意处关闭';
	display: block;
	padding: 20px;
}
@keyframes fadeIn {
	0% {
		opacity: 0;
	}
	100% {
		opacity: 1;
	}
}
div.popupContent {
	background: #fff;
	padding: 0 50px;
	color: #000;
	min-width: 320px;
	height: 80%;
	width: 80%;
	display: flex;
	align-items: center;
	flex-direction: column;
	animation: slideDown 0.5s ease;
	overflow-y: scroll;
	overflow-x: hidden;
}
div.popupContent > img {
	width: 100%;
	height: auto;
}
div.popupContent > a.title {
	margin: 50px 0;
	border-bottom: dotted 1px #999;
	transition: all 0.2s ease-in-out;
	text-decoration: none;
	color: inherit;
}
div.popupContent > .title:hover {
	border-bottom-color: transparent;
}
@keyframes slideDown {
	from {
		transform: translateY(-10%);
		opacity: 0.3;
	}
	to {
		transform: translateY(0);
	}
}
div#changelogContainer > a.item::before {
	content: attr(data-sha);
	margin-right: 50px;
}
div#changelogContainer > a.item {
	width: 100%;
	display: flex;
	flex-direction: row;
	align-items: center;
	cursor: pointer;
	color: #000;
	text-decoration: none;
}

@media screen and (max-width: 576px) {
	div.btnContainer {
		display: flex;
		justify-content: center;
		align-items: center;
		flex-direction: column;
	}
	div.btnContainer > br {
		display: none;
	}
}