/* ============================================================
   Layout — Motherboard Campaign Wiki
   Site shell: header, nav, page-main. Grid utilities.
   ============================================================ */

/* ── Site wrapper ────────────────────────────────────────── */

.site-wrapper {
	display: flex;
	flex-direction: column;
	min-height: 100vh;
}

/* ── Site header ─────────────────────────────────────────── */

.site-header {
	position: sticky;
	top: 0;
	z-index: var(--z-nav);
	background-color: var(--deep);
	border-bottom: 1px solid var(--phosphor-border);
	box-shadow: var(--glow-p-sm);
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	padding: var(--sp-3) var(--sp-6);
	max-width: var(--content-max);
	margin: 0 auto;
}

.site-header__wordmark {
	font-family: var(--font-display);
	font-size: 1.4rem;
	font-weight: 700;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--phosphor);
	text-shadow: var(--glow-text-p);
}

.site-header__wordmark:hover {
	color: var(--phosphor-bright);
}

.site-header__subtitle {
	color: var(--text-secondary);
	font-weight: 400;
	font-size: 1rem;
	letter-spacing: 0.04em;
	margin-left: var(--sp-2);
}

/* ── Hamburger button ────────────────────────────────────── */

.site-header__hamburger {
	display: flex;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 40px;
	height: 40px;
	padding: var(--sp-2);
	background: none;
	border: 1px solid var(--surface-border);
	border-radius: var(--radius-sm);
	cursor: pointer;
	transition: border-color var(--transition-fast);
}

.site-header__hamburger span {
	display: block;
	width: 100%;
	height: 2px;
	background-color: var(--text-secondary);
	border-radius: 1px;
	transition:
		transform var(--transition-fast),
		opacity var(--transition-fast),
		background-color var(--transition-fast);
}

.site-header__hamburger:hover {
	border-color: var(--phosphor-border);
}

.site-header__hamburger:hover span {
	background-color: var(--phosphor);
}

/* Hamburger → X when open */
.site-header__hamburger[aria-expanded="true"] span:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}

.site-header__hamburger[aria-expanded="true"] span:nth-child(2) {
	opacity: 0;
}

.site-header__hamburger[aria-expanded="true"] span:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

/* Hide hamburger on desktop */
@media (min-width: 768px) {
	.site-header__hamburger {
		display: none;
	}
}

/* ── Site nav ────────────────────────────────────────────── */

.site-nav {
	background-color: var(--deep);
	border-bottom: 1px solid var(--surface-border);
	overflow: hidden;

	/* Mobile: collapsed by default */
	max-height: 0;
	transition: max-height var(--transition-base);
}

.site-nav.is-open {
	max-height: 400px;
}

/* Desktop: always visible */
@media (min-width: 768px) {
	.site-nav {
		max-height: none;
		overflow: visible;
	}
}

.site-nav__list {
	display: flex;
	flex-direction: column;
	max-width: var(--content-max);
	margin: 0 auto;
	padding: var(--sp-2) var(--sp-4);
}

@media (min-width: 768px) {
	.site-nav__list {
		flex-direction: row;
		padding: 0 var(--sp-6);
		gap: 0;
	}
}

.site-nav__link {
	display: block;
	padding: var(--sp-3) var(--sp-2);
	color: var(--text-secondary);
	font-family: var(--font-mono);
	font-size: 0.75rem;
	font-weight: 500;
	letter-spacing: 0.12em;
	text-transform: uppercase;
	border-bottom: 2px solid transparent;
	transition:
		color var(--transition-fast),
		border-color var(--transition-fast),
		text-shadow var(--transition-fast);
}

@media (min-width: 768px) {
	.site-nav__link {
		padding: var(--sp-3) var(--sp-4);
	}
}

.site-nav__link:hover {
	color: var(--phosphor);
	text-shadow: none;
}

.site-nav__link.is-active,
.site-nav__link[aria-current="page"] {
	color: var(--phosphor);
	border-bottom-color: var(--phosphor);
	text-shadow: var(--glow-text-p);
}

/* ── Page main ───────────────────────────────────────────── */

.page-main {
	flex: 1;
	max-width: var(--content-max);
	width: 100%;
	margin: 0 auto;
	padding: var(--sp-8) var(--sp-4);
}

@media (min-width: 768px) {
	.page-main {
		padding: var(--sp-10) var(--sp-6);
	}
}

/* ── Site footer ─────────────────────────────────────────── */

.site-footer {
	border-top: 1px solid var(--surface-border);
	padding: var(--sp-6) var(--sp-4);
	text-align: center;
}

.site-footer__text {
	font-family: var(--font-mono);
	font-size: 0.75rem;
	color: var(--text-secondary);
	letter-spacing: 0.06em;
}

/* ── Grid utilities ──────────────────────────────────────── */

.grid {
	display: grid;
	gap: var(--sp-4);
}

@media (min-width: 640px) {
	.grid--2 { grid-template-columns: 1fr 1fr; }
}

@media (min-width: 768px) {
	.grid--3   { grid-template-columns: 1fr 1fr 1fr; }
	.grid--2-1 { grid-template-columns: 2fr 1fr; }
	.grid--1-2 { grid-template-columns: 1fr 2fr; }
}

@media (min-width: 1024px) {
	.grid--4 { grid-template-columns: repeat(4, 1fr); }
}

.col-span-full {
	grid-column: 1 / -1;
}

/* ── Section ─────────────────────────────────────────────── */

.page-section {
	margin-bottom: var(--sp-12);
}

.page-section:last-child {
	margin-bottom: 0;
}