* {
	margin: 0;
}

:root {
	--animTime: 0.2s;
	--animType: linear;
}

body, button {
	transition: background-color var(--animTime) var(--animType),
				color var(--animTime) var(--animType);
}

body {
	height: 100%;
	width: 100%;
	max-width: 100vw;
	margin: 0;
	font-family: Arial, sans-serif;
}

button {
	padding: 10px 15px;
	font-weight: bold;
	z-index: 1;
	user-select: none;
	overflow: hidden;
}

.disabled { /* button disable */
	cursor: not-allowed;
	background-color: grey;
	color: white;
}

.main {
	position: fixed;
	top: 50%;
	left: 50%;
	transform: translate(-50%, -50%);
	text-align: center;
	z-index: 0;
}

.container {
	position: relative;
	top: 50px;
	width: 90vw;
	left: 50%;
	transform: translateX(-50%);
}

.content {
	width: 100%;
	overflow: auto;
	scrollbar-width: none;
}

.button-container {
	text-align: center;
}

.floating-button-container {
	position: fixed;
	top: 15px;
	right: 15px;
}

.bg {
	position: fixed;
	top: 0;
	left: 0;
	width: 100%;
	height: 100%;
	background: url('');
	background-position: center;
	background-repeat: no-repeat;
	background-size: cover;
	background-attachment: fixed;
}

@media (min-width: 700px) {
	.container {
		width: 700px;
	}
}