:root {
	--color_0: rgba(255, 255, 255, 0.75);
	--color_litegray: rgba(178, 178, 178, 0.8);
	--color_btn: #222;
	--color_text: #fff;
	--color_shadow: #000;
	--color_bg: #4c4c4c;
	--color_hover_bg: #ccc;
	--color_hover_text: #222;
}

* { margin: 0;
	padding: 0; }

.center {
	display: block;
	margin-left: auto;
	margin-right: auto;
	width: 50%;
}

body {
	width: 96%;
	background-color: white;
	margin: 15px auto; 
	padding: 20px; }

section, aside, h1, h2, h3, p {
	margin: 0;
	padding: 0;
}

section, aside {
	margin-bottom: 1em;
}

img {
	border-radius: 8px;
	max-width: 100%;
	height: auto;
	margin-bottom: .5em;
}

p {
	font-size: 95%;
	padding-bottom: .5em;
	line-height: 130%;
}

table, th, td {
	border: 0px solid black;
}

th, td {
	padding: 10px;
	text-align: center;
}

canvas {
	border: 1px solid gray;
}

div {
	padding: 15px;
}

#nav_menu ul {
	list-style: none;
	position: relative; }

#nav_menu ul li {
	float: left;
}
#nav_menu ul ul {
	display: none;         /* Don't display submenu until hover of the li element */
	position: absolute;
	top: 100%;             /* Position the submenu at the bottom of the main menu */
}
#nav_menu ul ul li {
	float: none;           /* Display the submenus vertically */
	position: relative;    /* So the second submenu can be positioned within the first submenu */
}
#nav_menu ul ul li ul {
	position: absolute;
	left: -100%;           /* Position the second submenu at the left side of the li element */ 
	top: 0;                /* Position the second submenu at the top of the li element */
}
#nav_menu ul li:hover > ul {
	display: block;        /* Display the submenu on hover of the li element */
}
#nav_menu ul::after {
	content: "";
	clear: both;
	display: block;
}

/* The styles for the formatting of the multi-tier navigation menu */
#nav_menu ul {
	width: 100%;
	margin: 0;
	padding: 0;
}
#nav_menu ul li {
	width: 25%;
}
#nav_menu ul li a {
	text-align: center;
	display: block;
	padding: 1em 0;
	text-decoration: none;
	background-color: var(--color_bg);
	color: var(--color_text);
	font-weight: bold;
}

#nav_menu ul li a.current {
	color: yellow;
}
#nav_menu ul li a:hover, #nav_menu ul li a:focus {
	background-color: var(--color_hover_bg);
}
#nav_menu ul li:hover ul {
	width: 100%;
}
#nav_menu ul li:hover ul li a {
	display: block;
	width: 178px;
	text-align: center;
}

#sidebar {
	margin: 0;
	padding: 10px;
	background-color: var(--color_litegray);
	right: 0;
	position: fixed; }

main {
	width: 76%; 
	float: left; }

footer {
	clear: both;
	width: 100%;
	padding-top: .7em;
}
footer p {
	font-size: 80%;
	text-align: center;
}

.slicknav_menu {
	font-size: 16px;
	box-sizing: border-box;
	background: var(--color_bg);
	padding: 5px;
}
.slicknav_menu .slicknav_menutxt {
	color: var(--color_text);
	font-weight: bold;
	text-shadow: 0 1px 3px var(--color_shadow);
}
.slicknav_menu .slicknav_icon-bar {
	background-color: var(--color_text);
}
.slicknav_btn {
	margin: 5px 5px 6px;
	text-decoration: none;
	text-shadow: 0 1px 1px var(--color_0);
	-webkit-border-radius: 4px;
	-moz-border-radius: 4px;
	border-radius: 4px;
	background-color: var(--color_btn);
}
.slicknav_nav {
	color: var(--color_text);
	margin: 0;
	padding: 0;
	font-size: 0.875em;
	list-style: none;
	overflow: hidden;
}
.slicknav_menu ul {
	list-style: none;
	overflow: hidden;
	padding: 0;
	margin: 0 0 0 20px;
}
.slicknav_menu .slicknav_row {
	padding: 5px 10px;
	margin: 2px 5px;
}
.slicknav_menu .slicknav_row:hover {
	-webkit-border-radius: 6px;
	-moz-border-radius: 6px;
	border-radius: 6px;
	background: var(--color_hover_bg);
	color: var(--color_text);
}
.slicknav_menu a {
	padding: 5px 10px;
	margin: 2px 5px;
	text-decoration: none;
	color: var(--color_text);
}
.slicknav_menu a:hover {
	-webkit-border-radius: 6px;
	-moz-border-radius: 6px;
	border-radius: 6px;
	background: var(--color_hover_bg);
	color: var(--color_hover_text);
}
.slicknav_menu .slicknav_txtnode {
	margin-left: 15px;
}
.slicknav_menu .slicknav_item a {
	padding: 0;
	margin: 0;
}
.slicknav_menu .slicknav_parent-link a {
	padding: 0;
	margin: 0;
}
.slicknav_brand {
	color: var(--color_text);
	font-size: 18px;
	line-height: 30px;
	padding: 7px 12px;
	height: 44px;
}