/* ==========================================================================
   Container, skip link, site header, site footer.
   ========================================================================== */

.zd-container {
	margin-inline: auto;
	max-width: var(--container);
	padding-inline: var(--gutter);
	width: 100%;
}

.zd-measure {
	max-width: var(--measure);
}

/* --- Skip link ------------------------------------------------------------ */

.zd-skip {
	background: var(--color-brand);
	border-radius: var(--radius-sm);
	color: var(--color-brand-ink);
	font-weight: 500;
	left: var(--space-2);
	padding: var(--space-1) var(--space-2);
	position: fixed;
	top: var(--space-2);
	transform: translateY(-200%);
	transition: transform var(--dur-fast) var(--ease);
	z-index: 100;
}

.zd-skip:focus {
	color: var(--color-brand-ink);
	transform: translateY(0);
}

/* --- Header ---------------------------------------------------------------
   Sticky, transparent at rest. main.js adds .is-scrolled past 8px, which brings
   in the blur and hairline so the bar separates from content without a
   permanent box sitting over the hero. */

.zd-header {
	position: sticky;
	top: 0;
	z-index: 50;
	border-bottom: 1px solid transparent;
	transition: background-color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
		backdrop-filter var(--dur-fast) var(--ease);
}

.zd-header.is-scrolled {
	background-color: rgba(var(--bg-rgb), 0.72);
	backdrop-filter: blur(12px);
	border-bottom-color: var(--color-border);
}

.zd-header__inner {
	align-items: center;
	display: flex;
	gap: var(--space-4);
	height: var(--space-10);
	justify-content: space-between;
}

/* --- Logo ----------------------------------------------------------------- */

.zd-logo {
	align-items: baseline;
	color: var(--color-text);
	display: inline-flex;
	font-family: var(--font-heading);
	font-size: 1.25rem;
	font-weight: 800;
	gap: 3px;
	letter-spacing: var(--tracking-heading);
}

.zd-logo:hover {
	color: var(--color-text);
}

.zd-logo__dot {
	height: 7px;
	width: 7px;
	transition: transform var(--dur-fast) var(--ease);
}

.zd-logo:hover .zd-logo__dot {
	transform: translateY(-3px);
}

.custom-logo-link img {
	max-height: var(--space-4);
	width: auto;
}

/* Inlined wordmark from assets/img/logo.svg. Height-constrained so any artboard
   width works.
   The artboard is tight to the lettering — no background block, no baked-in
   padding — so this height is the cap height itself, not a box around it. 48px
   is a deliberately confident wordmark against the 80px header bar. */
.zd-logo--svg {
	--logo-h: var(--space-6);
	gap: 0;
}

.zd-logo--svg svg {
	display: block;
	height: var(--logo-h);
	width: auto;
}

/* The footer is a quieter context — step it back down a notch. */
.zd-footer .zd-logo--svg {
	--logo-h: var(--space-5);
}

.zd-logo--svg:hover {
	color: var(--color-text);
	filter: drop-shadow(var(--glow-sm));
}

/* --- Primary nav ---------------------------------------------------------- */

.zd-nav ul {
	align-items: center;
	display: flex;
	gap: var(--space-4);
	list-style: none;
	margin: 0;
	padding: 0;
}

.zd-nav a {
	color: var(--color-text-muted);
	font-size: var(--fs-sm);
	font-weight: 500;
	position: relative;
	padding-block: var(--space-1);
}

.zd-nav a:hover,
.zd-nav .current-menu-item > a {
	color: var(--color-text);
}

/* The dot as hover affordance — it belongs to the nav item, not to a decoration. */
.zd-nav a::after {
	background: var(--color-brand);
	border-radius: var(--radius-pill);
	content: "";
	height: 4px;
	left: 50%;
	opacity: 0;
	position: absolute;
	bottom: -2px;
	transform: translate(-50%, 4px);
	transition: opacity var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
	width: 4px;
}

.zd-nav a:hover::after,
.zd-nav .current-menu-item > a::after {
	opacity: 1;
	transform: translate(-50%, 0);
}

.zd-header__actions {
	align-items: center;
	display: flex;
	gap: var(--space-2);
}

/* --- Nav toggle ----------------------------------------------------------- */

.zd-nav-toggle {
	align-items: center;
	background: transparent;
	border: 1px solid var(--color-border-control);
	border-radius: var(--radius-btn);
	cursor: pointer;
	display: none;
	height: 40px;
	justify-content: center;
	position: relative;
	transition: border-color var(--dur-fast) var(--ease);
	width: 40px;
}

/* 40px is the drawn button and also four pixels under the touch floor. An
   expanded hit area rather than a bigger box, so the header keeps its
   proportions and the thumb still gets 48px. */
.zd-nav-toggle::after {
	content: "";
	inset: -4px;
	position: absolute;
}

/* Brand rather than --color-border-strong: that token is fainter than the
   control border it would be replacing, so the hover read as the button going
   out. No glow, unlike the secondary button — the header bar is chrome and the
   bloom belongs to the calls to action. */
.zd-nav-toggle:hover {
	border-color: var(--color-brand);
}

.zd-nav-toggle__bars,
.zd-nav-toggle__bars::before,
.zd-nav-toggle__bars::after {
	background: var(--color-text);
	border-radius: var(--radius-pill);
	display: block;
	height: 1.5px;
	transition: transform var(--dur-fast) var(--ease), opacity var(--dur-fast) var(--ease);
	width: 16px;
}

.zd-nav-toggle__bars::before,
.zd-nav-toggle__bars::after {
	content: "";
	position: absolute;
}

.zd-nav-toggle__bars {
	position: relative;
}

.zd-nav-toggle__bars::before {
	transform: translateY(-5px);
}

.zd-nav-toggle__bars::after {
	transform: translateY(5px);
}

.zd-nav-toggle[aria-expanded="true"] .zd-nav-toggle__bars {
	background: transparent;
}

.zd-nav-toggle[aria-expanded="true"] .zd-nav-toggle__bars::before {
	transform: rotate(45deg);
}

.zd-nav-toggle[aria-expanded="true"] .zd-nav-toggle__bars::after {
	transform: rotate(-45deg);
}

/* --- Mobile nav ----------------------------------------------------------- */

@media (max-width: 900px) {
	.zd-nav-toggle {
		display: inline-flex;
	}

	.zd-header__actions .zd-btn {
		display: none;
	}

	.zd-nav {
		background: var(--color-bg);
		border-bottom: 1px solid var(--color-border);
		display: none;
		left: 0;
		padding: var(--space-3) var(--gutter) var(--space-5);
		position: absolute;
		right: 0;
		top: 100%;
	}

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

	.zd-nav ul {
		align-items: stretch;
		flex-direction: column;
		gap: 0;
	}

	.zd-nav li {
		border-bottom: 1px solid var(--color-border);
	}

	.zd-nav a {
		display: block;
		font-size: var(--fs-lg);
		padding-block: var(--space-2);
	}

	.zd-nav a::after {
		left: auto;
		right: 0;
		top: 50%;
		bottom: auto;
		transform: translate(4px, -50%);
	}

	.zd-nav a:hover::after,
	.zd-nav .current-menu-item > a::after {
		transform: translate(0, -50%);
	}
}

/* --- Footer --------------------------------------------------------------- */

.zd-footer {
	border-top: 1px solid var(--color-border);
	margin-top: var(--section-gap);
	padding-block: var(--space-6);
}

.zd-footer__inner {
	align-items: center;
	display: flex;
	gap: var(--space-4);
	justify-content: space-between;
}

.zd-footer__nav ul {
	display: flex;
	gap: var(--space-3);
	list-style: none;
	margin: 0;
	padding: 0;
}

.zd-footer__nav a,
.zd-footer__social a {
	color: var(--color-text-muted);
	font-size: var(--fs-sm);
}

.zd-footer__nav a:hover,
.zd-footer__social a:hover {
	color: var(--color-brand);
}

.zd-footer__social ul {
	display: flex;
	gap: var(--space-3);
	list-style: none;
	margin: 0;
	padding: 0;
}

.zd-footer__legal {
	border-top: 1px solid var(--color-border);
	color: var(--color-text-faint);
	display: flex;
	flex-wrap: wrap;
	font-size: var(--fs-sm);
	gap: var(--space-2);
	justify-content: space-between;
	margin-top: var(--space-6);
	padding-top: var(--space-3);
}

.zd-footer__status {
	align-items: center;
	display: flex;
	font-family: var(--font-mono);
	font-size: var(--fs-label);
	gap: var(--space-1);
	letter-spacing: var(--tracking-label);
	text-transform: uppercase;
}

@media (max-width: 768px) {
	.zd-footer__inner {
		align-items: flex-start;
		flex-direction: column;
		gap: var(--space-4);
	}

	.zd-footer__nav ul {
		flex-wrap: wrap;
		/* The padding below supplies the vertical separation, so the row gap
		   would double it. */
		gap: 0 var(--space-3);
	}

	/* Footer links are 17px of text with nothing around them. Padding rather
	   than a height: these are inline items in a wrapping row, and a height
	   would leave the rows' baselines uneven. */
	.zd-footer__nav a,
	.zd-footer__social a {
		display: inline-block;
		padding-block: var(--space-2);
	}
}

/* --- Main ----------------------------------------------------------------- */

.zd-main {
	display: block;
}