/* Shared chrome: tokens, scroll button, header, topnav */
:root {
	--rf_orange: #f9b256;
	--rf_orange_dark: #e57e25;
	--rf_orange_named: orange;
	--rf_gray: #555;
	--rf_gray_light: #ddd;
	--rf_text: #333;
	--rf_header_bg: #666;
	--rf_font_display: 'Literata', Georgia, serif;
	--rf_font_ui: 'Oswald', 'Trebuchet MS', sans-serif;
}

body {
	margin: 0;
}

* {
	box-sizing: border-box;
}

html {
	scroll-behavior: smooth;
}

/* Scroll-up button */
#myUpBtn {
	display: none;
	position: fixed;
	bottom: 15px;
	right: 15px;
	z-index: 999;
	font-size: 1.6em;
	font-weight: 300;
	outline: none;
	background-color: var(--rf_gray_light);
	color: #666;
	border: 3px solid var(--rf_orange_named);
	border-radius: 5px;
	box-shadow: 0 4px 8px 0 rgba(0, 0, 0, 0.15), 0 6px 20px 0 rgba(0, 0, 0, 0.14);
	cursor: pointer;
	padding: 0 12px 3px 12px;
}

#myUpBtn:hover {
	background-color: var(--rf_orange);
	color: #fff;
}

/* Brand header */
h1 {
	color: #fff;
	font-family: var(--rf_font_display);
	background-color: var(--rf_header_bg);
	margin: 0;
	padding: 12px 16px;
	font-size: 2em;
	font-weight: 400;
	letter-spacing: 0.02em;
}

/* Top navigation */
.topnav {
	overflow: hidden;
	background-color: #f1f1f1;
	font-family: var(--rf_font_ui);
}

.topnav a {
	float: left;
	display: block;
	color: var(--rf_gray);
	text-align: center;
	padding: 12px 14px;
	text-decoration: none;
	font-size: 16px;
}

.topnav a:hover {
	background-color: #ddd;
	color: #000;
}

.topnav a.active {
	background-color: var(--rf_orange_named);
	color: #fff;
}

.topnav .icon {
	display: none;
	float: right;
	background: transparent;
	border: none;
	color: var(--rf_gray);
	padding: 10px 14px;
	cursor: pointer;
}

.topnav .icon:hover {
	background-color: #ddd;
	color: #000;
}

.topnav .menu_icon {
	display: block;
	vertical-align: middle;
}

@media screen and (max-width: 800px) {
	.topnav a:not(:first-child) {
		display: none;
	}

	.topnav .icon {
		display: block;
	}

	.topnav.responsive {
		position: relative;
	}

	.topnav.responsive .icon {
		position: absolute;
		right: 0;
		top: 0;
	}

	.topnav.responsive a {
		float: none;
		display: block;
		text-align: left;
	}
}