:root {
	--primary-color: #30c88b;
	--background-color: #000;
	--secondary-background-color: #333;
}

* {
	box-sizing: border-box;
}

body {
	background: var(--background-color) url('../img/bg.jpg') no-repeat 0px 40px /
		cover;
	color: #fff;
	font-family: Arial, Helvetica, sans-serif;
	font-size: 16px;
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: 100vh;
	margin: 0;
}

ul {
	list-style: none;
	padding: 0;
}

.content {
	opacity: 0;
	object-fit: cover;
	position: absolute;
	top: 0;
	left: 0;
	height: calc(100% - 60px);
	width: 100%;
	transition: opacity 0.4s ease;
	padding: 0 20px;
}

.content li {
	padding: 10px 0;
	border-bottom: 1px #555 solid;
	background: var(--secondary-background-color);
}

.content.show {
	opacity: 1;
}

.hide {
	display: none;
}

nav {
	position: absolute;
	bottom: 0;
	left: 0;
	margin-top: -5px;
	width: 100%;
}

nav ul {
	background-color: var(--secondary-background-color);
	display: flex;
	padding: 5px 0 0;
	margin: 0;
	list-style-type: none;
	height: 60px;
}

nav ul li {
	color: #f4f4f4;
	cursor: pointer;
	flex: 1;
	padding: 10px;
	text-align: center;
	text-transform: uppercase;
	font-weight: bold;
}

h1,
nav ul li:hover,
nav ul li.active {
	color: var(--primary-color);
}

nav ul li p {
	font-size: 12px;
	margin: 2px 0;
}

.progress-bar {
	background: var(--secondary-background-color);
	border-radius: 13px;
	height: 20px;
	width: 300px;
	padding: 3px;
}

.progress {
	content: '';
	display: block;
	background: var(--primary-color);
	height: 100%;
	border-radius: 9px;
}

.alert {
	text-align: center;
	padding: 5px;
	color: orange;
	border: orange 1px solid;
}

.form-control {
	margin: 15px 0;
}

.form-control label {
	display: block;
	margin-bottom: 10px;
}

.form-control input,
.form-control select {
	width: 100%;
	padding: 4px;
}

.btn {
	cursor: pointer;
	display: inline-block;
	border: 0;
	background: var(--secondary-background-color);
	color: #fff;
	padding: 7px 10px;
	margin-top: 10px;
}

.btn:active,
.btn:focus {
	outline: 0;
}
