/* start light mode styling */

:root {
	--text: #888888;
	--border: #111111;
	--accent: #ffcc00;
	--bg: #000000;
	--gradientTop:  #0c0c0c;
	--gradientBottom:  #0c0c0c;
}

header {
	background: url('***light mode banner image***');
}

/* end light mode styling */


/* start dark mode styling */

@media (prefers-color-scheme: dark) {

:root {
	--text: #888888;
	--border: #111111;
	--accent: #ffcc00;
	--bg: #000000;
	--gradientBottom: #0c0c0c;
	--gradientTop: #0c0c0c;
}

header {
	background: url('***dark mode banner image***');
}

}

/* end dark mode styling */


* { 
	box-sizing: border-box;
}

body {
	padding: 10px;
	font-family: 'MS PGothic', sans-serif;
	color: var(--text);

	background-color: var(--gradientTop);
	background-image:
	linear-gradient(180deg, var(--bg) 12%, transparent 12.5%, transparent 87%, var(--bg) 87.5%, var(--bg)),
	linear-gradient(150deg, var(--bg) 12%, transparent 12.5%, transparent 87%, var(--bg) 87.5%, var(--bg)),
	linear-gradient(0deg, var(--bg) 12%, transparent 12.5%, transparent 87%, var(--bg) 87.5%, var(--bg)),
	linear-gradient(150deg, var(--bg) 12%, transparent 12.5%, transparent 87%, var(--bg) 87.5%, var(--bg)),
	linear-gradient(180deg, var(--bg) 25%, transparent 25.5%, transparent 75%, var(--bg) 75%, var(--bg)),
	linear-gradient(180deg, var(--bg) 25%, transparent 25.5%, transparent 75%, var(--bg) 75%, var(--bg));

	background-size: 10px 10px;
	background-position: 0 0, 0 0, 10px 18px, 10px 18px, 0 0, 10px 18px;
}


.container {
	max-width: 55rem;
	margin: 5vw auto 12px auto;
	border: 6px ridge var(--border);
	outline: 3px solid var(--gradientTop);
	outline-offset: 4px;
	border-radius: 0px;
	display: flex;
	flex-wrap: wrap;
	padding: 5px;
	gap: 5px;

	background-color: var(--gradientBottom);

	/* required for background layer */
	position: relative;
	overflow: hidden;
}

/* stable radial background layer */
.container::before {
	content: "";
	position: absolute;
	inset: 0;
	z-index: 0;

	background-image:
	repeating-radial-gradient(circle at 0 0, transparent 0, var(--gradientBottom) 9px),
	repeating-linear-gradient(var(--bg), var(--bg));
}

/* keep all content above the background layer */
.container > * {
	position: relative;
	z-index: 1;
}


/* column widths */

.small { flex: 1 1 9%; }
.large { flex: 1 1 82%; }
.full { flex: 1 1 100%; }
.half { flex: 1 1 49%; }


header {
	background-size: cover;
	background-position: center;
	width: 100%;
	height: 120px;
	border: 2px ridge var(--border);
	border-radius: 0px;
	position: relative;
}

header span {
	font-size: 2.5rem;
	position: absolute;
	bottom: 0;
	right: 10px;
	margin: 10px;
	font-weight: bold;

	text-shadow:
	1px 1px var(--text),
	-1px 1px var(--text),
	1px -1px var(--accent),
	-1px -1px var(--accent);

	color: var(--gradientTop);
}


nav {
	border: 2px ridge var(--border);
	border-radius: 0px;
	padding: 5px;

	background: linear-gradient(var(--gradientTop),var(--gradientBottom));
}

nav div {
	text-align: center;
	font-size: 1.25rem;
	margin: 5px 5px 10px 5px;
}

nav a {
	display: block;
	margin: 5px;
	background: linear-gradient(to right,var(--bg),var(--gradientBottom));
	border-radius: 0px;
	padding: 2px 7px;
	text-decoration: none;
}

nav a:link,
nav a:visited { 
	color: var(--text);
}

nav a:hover,
nav a:focus {
	background: linear-gradient(to right,var(--bg), var(--gradientBottom), var(--gradientTop));
	font-style: italic;
	color: var(--accent);
}


/* optional button styling */

div.small > img {
	display: block;
	margin: 5px auto;
	border:2px ridge var(--border);
	border-radius: 0px;
}


section {
	border: 2px ridge var(--border);
	border-radius: 0px;
	background: linear-gradient(var(--gradientTop),var(--gradientBottom));
	padding: 5px;
}


footer {
	text-align: center;
	margin-bottom: 5vw;
	font-size: 0.8rem;
}

footer a { 
	text-decoration: none;
}


h1, h2, h3, h4, h5, h6, p  { 
	margin: 5px;
	line-height: 1.2;
}

h1 { 
	font-size: 1.4rem;
	letter-spacing: 2px;
	font-weight: normal;
	text-align: center;
	border-bottom: 2px ridge var(--border);
	padding-bottom: 5px;
}

h2 { 
	font-size: 1.25rem;
	font-weight: normal;
	text-align: center;
}

h3 { 
	font-size: 1.1rem;
}

h4 { 
	font-size: 1rem;
	color: var(--accent);
	padding-left: 12px;
}


a:hover,
a:focus {
	font-style: italic;
	color: var(--accent);
}

a:visited {
	color: var(--accent);
}


/* prevents overflow on smaller screens */

img { 
	max-width: 100%;
}

pre { 
	overflow-x: auto;
}