/*
 * Site header — sticky via CSS only (no JS needed for that part).
 * DESIGN.md §10.
 */

.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(5, 12, 18, 0.92);
	backdrop-filter: blur(14px);
	-webkit-backdrop-filter: blur(14px);
	border-bottom: 1px solid var(--ark-border-soft);
}

.site-header__inner {
	display: flex;
	align-items: center;
	gap: 24px;
	height: 76px;
}

.site-header__logo {
	display: flex;
	flex-direction: column;
	line-height: 1.1;
	margin-right: auto;
}

.site-header__logo-mark {
	font-family: var(--ark-font-sans);
	font-weight: 800;
	font-size: 1.5rem;
	letter-spacing: 0.015em;
	color: var(--ark-text-primary);
}

.site-header__logo-sub {
	font-size: 0.68rem;
	font-weight: 500;
	letter-spacing: 0.1em;
	color: var(--ark-text-secondary);
}

.site-header__menu {
	display: flex;
	align-items: center;
	gap: 20px;
}

.site-header__menu a {
	display: inline-block;
	font-size: 0.92rem;
	color: var(--ark-text-secondary);
	padding-block: 6px;
	white-space: nowrap;
	border-bottom: 1px solid transparent;
	transition:
		color 150ms var(--ark-ease),
		border-color 150ms var(--ark-ease);
}

.site-header__menu a:hover,
.site-header__menu a:focus-visible {
	color: var(--ark-text-primary);
	border-color: var(--ark-border-titanium);
}

.site-header__actions {
	display: flex;
	align-items: center;
	gap: 16px;
	flex-shrink: 0;
}

.site-header__phone {
	display: flex;
	flex-direction: column;
	flex-shrink: 0;
	text-align: right;
	line-height: 1.25;
}

.site-header__phone-number {
	font-size: 0.95rem;
	font-weight: 600;
	white-space: nowrap;
	color: var(--ark-text-primary);
}

.site-header__phone-hours {
	font-size: 0.72rem;
	color: var(--ark-text-muted);
}

.site-header__cta {
	height: 44px;
	padding-inline: 22px;
	font-size: 0.85rem;
}

/* Hidden except inside the mobile nav dropdown (shown below 1240px). */
.site-header__nav-cta {
	display: none;
}

.site-header__toggle {
	display: none;
	position: relative;
	width: 44px;
	height: 44px;
	flex-shrink: 0;
	background: transparent;
	border: 1px solid var(--ark-border-soft);
	border-radius: var(--ark-radius-sm);
}

.site-header__toggle-bar,
.site-header__toggle-bar::before,
.site-header__toggle-bar::after {
	content: "";
	position: absolute;
	left: 12px;
	right: 12px;
	height: 1.5px;
	background: var(--ark-text-primary);
	transition:
		transform 150ms var(--ark-ease),
		opacity 150ms var(--ark-ease),
		background 150ms var(--ark-ease);
}

.site-header__toggle-bar {
	top: 21px;
}

.site-header__toggle-bar::before {
	top: -7px;
}

.site-header__toggle-bar::after {
	top: 7px;
}

/* .site-header__toggle-bar is itself position:absolute (grouped rule above),
   so it becomes the containing block for its own ::before/::after — their
   inherited left/right:12px would resolve against the bar's own ~20px box
   instead of the 44px button, collapsing both to zero width. Re-anchor them
   to the bar's full width instead. */
.site-header__toggle-bar::before,
.site-header__toggle-bar::after {
	left: 0;
	right: 0;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar {
	background: transparent;
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar::before {
	transform: translateY(7px) rotate(45deg);
}

.site-header__toggle[aria-expanded="true"] .site-header__toggle-bar::after {
	transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 1024px) {
	.site-header__phone {
		display: none;
	}
}

/*
 * 8 nav labels at nowrap + the larger stage1b logo/nav sizing no longer fit
 * next to the CTA below ~1240px (verified — they overflowed at 1024px).
 * Switch to the hamburger earlier rather than shrinking nav text back down.
 *
 * Threshold re-measured (site-wide horizontal-overflow audit): the full
 * desktop row (logo + 8 nav labels + phone + CTA, all nowrap/flex-shrink:0)
 * needs >=1388px of viewport to render without overflowing — the previous
 * 1240px cutoff left a real overflow gap between 1241px and 1387px
 * (confirmed: document.documentElement.scrollWidth exceeded clientWidth by
 * up to 108px across that range on every page, since this header is
 * shared/unconditional). Raised to 1420px for a real safety margin above
 * the measured 1388px requirement while staying below 1440px, so the
 * primary desktop viewport keeps the full nav unchanged.
 */
@media (max-width: 1420px) {
	.site-header__nav {
		position: absolute;
		top: 76px;
		left: 0;
		right: 0;
		display: none;
		background: var(--ark-bg-850);
		border-bottom: 1px solid var(--ark-border-soft);
		padding: 16px 0 20px;
	}

	.site-header__nav.is-open {
		display: block;
	}

	.site-header__menu {
		flex-direction: column;
		align-items: flex-start;
		gap: 2px;
		padding-inline: var(--ark-container-pad);
	}

	.site-header__menu a {
		width: 100%;
		padding-block: 10px;
	}

	.site-header__toggle {
		display: block;
	}

	/*
	 * The standalone header CTA plus the toggle no longer fit next to the
	 * logo at narrow widths (mobile CTA text is long — "Получить
	 * консультацию"). Hide it here and rely on the full-width duplicate
	 * inside the nav dropdown instead.
	 */
	.site-header__cta {
		display: none;
	}

	.site-header__nav-cta {
		display: flex;
		width: calc(100% - var(--ark-container-pad) * 2);
		margin: 14px var(--ark-container-pad) 0;
	}
}