/**
 * Site header, primary navigation and footer.
 */

.bz-header {
	position: sticky;
	top: 0;
	z-index: 50;
	background-color: var(--bz-header-bg);
	border-bottom: 1px solid var(--bz-border);
	backdrop-filter: blur(12px);
	-webkit-backdrop-filter: blur(12px);
}

.bz-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 24px;
	min-height: var(--bz-header-height);
}

/* Navigation plus the theme switch, kept together on the right. */
.bz-header__end {
	display: flex;
	align-items: center;
	gap: 20px;
}

/* Colour scheme switch. Shows the mode you would switch to, not the current one. */
.bz-theme-toggle {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	flex: none;
	width: 32px;
	height: 32px;
	padding: 0;
	background-color: transparent;
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius-sm);
	color: var(--bz-ink-soft);
	cursor: pointer;
	transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.bz-theme-toggle:hover,
.bz-theme-toggle:focus-visible {
	background-color: var(--bz-surface-2);
	border-color: var(--bz-ink-faint);
	color: var(--bz-ink);
}

.bz-theme-toggle__icon {
	width: 16px;
	height: 16px;
}

.bz-theme-toggle__icon--sun {
	display: block;
}

.bz-theme-toggle__icon--moon {
	display: none;
}

html[data-theme='light'] .bz-theme-toggle__icon--sun {
	display: none;
}

html[data-theme='light'] .bz-theme-toggle__icon--moon {
	display: block;
}

.bz-brand {
	display: inline-flex;
	align-items: center;
	gap: 10px;
	color: var(--bz-ink);
	text-decoration: none;
	flex: none;
}

.bz-brand:hover,
.bz-brand:focus-visible {
	color: var(--bz-ink);
	text-decoration: none;
}

.bz-brand__mark {
	width: 26px;
	height: 26px;
	color: var(--bz-accent);
	flex: none;
}

.bz-brand__name {
	font-family: var(--bz-font-heading);
	font-size: 15px;
	font-weight: 800;
	letter-spacing: 0.06em;
	text-transform: uppercase;
}

/* Primary navigation */
.bz-nav__menu {
	display: flex;
	align-items: center;
	gap: 28px;
}

.bz-nav__menu .menu-item {
	list-style: none;
}

.bz-nav__link {
	display: inline-block;
	padding-block: 6px;
	border-bottom: 1px solid transparent;
	color: var(--bz-ink-soft);
	font-size: 14px;
	font-weight: 600;
	text-decoration: none;
	transition: color 0.15s ease, border-color 0.15s ease;
}

.bz-nav__link:hover,
.bz-nav__link:focus-visible,
.current-menu-item > .bz-nav__link,
.current-menu-ancestor > .bz-nav__link {
	color: var(--bz-ink);
	border-bottom-color: var(--bz-ink);
	text-decoration: none;
}

/* Sub menus */
.bz-nav__menu .sub-menu {
	display: none;
}

.bz-nav__toggle {
	display: none;
	align-items: center;
	gap: 8px;
	padding: 8px 12px;
	background-color: transparent;
	border: 1px solid var(--bz-border);
	border-radius: var(--bz-radius-sm);
	color: var(--bz-ink);
	font-family: var(--bz-font-mono);
	font-size: 11px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	cursor: pointer;
}

.bz-nav__toggle-bars {
	position: relative;
	width: 14px;
	height: 10px;
}

.bz-nav__toggle-bars::before,
.bz-nav__toggle-bars::after {
	content: '';
	position: absolute;
	left: 0;
	width: 14px;
	height: 1.5px;
	background-color: currentColor;
}

.bz-nav__toggle-bars::before {
	top: 1px;
}

.bz-nav__toggle-bars::after {
	bottom: 1px;
}

@media (max-width: 780px) {
	.bz-nav__toggle {
		display: inline-flex;
	}

	.bz-nav {
		position: absolute;
		inset: 100% 0 auto 0;
		display: none;
		background-color: var(--bz-surface);
		border-bottom: 1px solid var(--bz-border);
	}

	.bz-nav.is-open {
		display: block;
	}

	.bz-nav__menu {
		flex-direction: column;
		align-items: stretch;
		gap: 0;
		padding: 8px var(--bz-gutter) 20px;
	}

	.bz-nav__link {
		width: 100%;
		padding-block: 12px;
		border-bottom: 1px solid var(--bz-border);
	}
}

/* Footer */
.bz-footer {
	border-top: 1px solid var(--bz-border);
	padding-block: 48px 40px;
}

.bz-footer__grid {
	display: grid;
	grid-template-columns: 1.6fr 1fr;
	gap: clamp(28px, 5vw, 64px);
}

.bz-footer__brand {
	font-family: var(--bz-font-heading);
	font-size: 15px;
	font-weight: 800;
	letter-spacing: 0.06em;
	text-transform: uppercase;
}

.bz-footer__legal {
	margin-top: 16px;
	max-width: 46ch;
	color: var(--bz-ink-faint);
	font-size: 13px;
	line-height: 1.7;
}

.bz-footer__heading {
	font-family: var(--bz-font-mono);
	font-size: 11px;
	font-weight: 400;
	letter-spacing: 0.09em;
	text-transform: uppercase;
	color: var(--bz-ink-faint);
}

.bz-footer__links {
	display: grid;
	gap: 10px;
	margin-top: 16px;
}

.bz-footer__links a {
	color: var(--bz-ink-soft);
	font-size: 14px;
	font-weight: 600;
	text-decoration: none;
}

.bz-footer__links a:hover,
.bz-footer__links a:focus-visible {
	color: var(--bz-ink);
	text-decoration: underline;
}

.bz-footer__bottom {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	gap: 12px;
	margin-top: 40px;
	padding-top: 20px;
	border-top: 1px solid var(--bz-border);
	font-family: var(--bz-font-mono);
	font-size: 12px;
	color: var(--bz-ink-faint);
}

@media (max-width: 780px) {
	.bz-footer__grid {
		grid-template-columns: 1fr;
	}
}