/* start light mode styling */
:root {
	--text: darkslategrey;
	--border: lightgrey;
	--accent: teal;
	--bg: #dce3e1;
	--gradientTop: white;
	--gradientBottom: rgba(240, 248, 255, 0.8);
}

header {
	background: url("/cyanobacteria.png");
}
/* end light mode styling */

/* start dark mode styling */
@media (prefers-color-scheme: dark) {
	:root {
		--text: #f0efed;
		--border: #5a7678;
		--accent: #74C365;
		--bg: #191919;
		--gradientBottom: #191919;
		--gradientTop: #1e674f;
	}

	header {
		background: url("/game_of_life/moss.jpg");
	}

	/* moved OUT of :root (was invalid) */
	a:link {
		color: lightblue;
	}
}
/* end dark mode styling */

* { 
	box-sizing: border-box;
}


/* ===== BASE PAGE SETUP ===== */
body {
	margin: 0;
	position: relative;
	min-height: 100vh;
	color: var(--text);
font-family: "EB Garamond", serif;
}

/* ===== BLURRED BACKGROUND IMAGE ===== */
body::before {
	content: "";
	position: fixed;
	inset: 0;
	background: url("/game_of_life/bg_temple.jpg") center / cover no-repeat;
	filter: blur(10px);
	transform: scale(1.08);
	z-index: 0;
}

/* ===== DARK OVERLAY (makes text readable) ===== */
body::after {
	content: "";
	position: fixed;
	inset: 0;
	background: linear-gradient(
		180deg,
		rgba(5,12,10,0.55),
		rgba(7,16,13,0.78)
	);
	z-index: 1;
}

/* ===== MAKE SURE YOUR CONTENT IS ABOVE BACKGROUND ===== */
header,
nav,
section,
footer,
.container {
	position: relative;
	z-index: 2;
}


.container {
	max-width: 55rem;
	margin: 5vw auto 12px auto;
	border: 6px ridge var(--border);
	outline: 3px solid var(--gradientTop);
	outline-offset: 4px;
	border-radius: 10px;
	display: flex;
	flex-wrap: wrap;
	padding: 5px;
	gap: 5px;

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

.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: 5px;
	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: 5px;
	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: 5px;
	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));
}

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

section {
	border: 2px ridge var(--border);
	border-radius: 5px;
	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;
}

img { max-width: 100%; }
pre { overflow-x: auto; }

a:hover,
a:focus {
	font-style: italic;
}

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