/* Layout — app shell: header, navigation, page container. */

.site-header {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	z-index: 1000;
	background: var(--nav-bg);
	color: var(--nav-fg);
	padding: 0.5rem 1rem;
	box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

.site-nav {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.25rem 1rem;
}

.site-nav__brand {
	display: inline-block;
	color: var(--nav-brand);
	font-size: 1.25rem;
	font-weight: 700;
	line-height: inherit;
	margin-right: 1rem;
	padding: 0.3125rem 0;
	text-decoration: none;
	white-space: nowrap;
}

.site-nav__brand:hover {
	color: var(--nav-brand);
	text-decoration: none;
}

.site-nav__toggle {
	display: none;
	background: transparent;
	border: 1px solid rgba(255, 255, 255, 0.18);
	border-radius: 6px;
	padding: 0.25rem 0.75rem;
	cursor: pointer;
	color: var(--nav-fg);
}

.site-nav__toggle-icon {
	display: block;
	width: 1.5em;
	height: 2px;
	background: var(--nav-fg);
	box-shadow: 0 -6px 0 var(--nav-fg), 0 6px 0 var(--nav-fg);
}

.site-nav__menu {
	list-style: none;
	margin: 0;
	padding: 0;
	display: flex;
	flex-wrap: wrap;
	gap: 0 0.5rem;
	margin-right: auto;
}

.site-nav__link {
	display: block;
	color: var(--nav-fg);
	text-decoration: none;
	padding: 0.5rem;
	border-radius: 6px;
}

.site-nav__link:hover,
.site-nav__link:focus {
	color: var(--nav-fg-hover);
	text-decoration: none;
	background: rgba(255, 255, 255, 0.08);
}

@media (max-width: 768px) {
	.site-nav__toggle {
		display: inline-block;
	}
	.site-nav__menu {
		flex-basis: 100%;
		flex-direction: column;
		display: none;
	}
	.site-nav__menu.is-open {
		display: flex;
	}
}

.page {
	padding: 4em 1rem 1rem;
	max-width: 1200px;
	margin: 0 auto;
}

.page-row {
	margin-bottom: 1em;
}