:root {
	--vk-header-bg: #000000;
	--vk-header-fg: #ffffff;
	--vk-header-muted: rgba(255, 255, 255, 0.6);
	--vk-header-divider: rgba(255, 255, 255, 0.4);
	--vk-header-pad-x: 40px;
	--vk-header-top-h: 150px;
	--vk-header-bottom-h: 100px;
	--vk-logo-w: 290px;
	--vk-mobile-h: 70px;
	--vk-mobile-bg: #ffffff;
	--vk-mobile-fg: #000000;
	--vk-panel-bg: #5a5a5a;
	--vk-focus: #ffb200;
}

/* Шапка */

.site-header {
	position: relative;
	z-index: 100;
	background: var(--vk-header-bg);
	color: var(--vk-header-fg);
	font-family: var(--vk-font);
}

.site-header a {
	text-decoration: none;
}

.site-header :focus-visible {
	outline: 2px solid var(--vk-focus);
	outline-offset: 4px;
}

.site-header__top {
	position: relative;
	display: grid;
	grid-template-columns: 1fr auto 1fr;
	grid-template-rows: var(--vk-header-top-h);
	align-items: center;
	gap: 20px;
	height: var(--vk-header-top-h);
	padding: 0 var(--vk-header-pad-x);
	overflow: hidden;
}

/* Логотип */

.site-header__logo {
	position: relative;
	z-index: 2;
	display: block;
	justify-self: center;
	max-width: 100%;
	padding-top: 4px;
}

.site-header__logo picture {
	display: block;
}

.site-header__logo-img {
	display: block;
	width: var(--vk-logo-w);
	max-width: 100%;
	height: auto;
}

/* Соцсети */

.socials {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 14px;
	margin: 0;
	padding: 0 0 0 5px;
	list-style: none;
}

/* Иконки вплотную друг к другу */
.socials--tight {
	gap: 2px;
	padding-left: 0;
}

.socials__item {
	display: flex;
}

.socials__link {
	display: block;
	color: inherit;
	transition: opacity var(--vk-transition);
}

.socials__link:hover {
	opacity: 0.75;
}

.socials__icon {
	display: block;
	width: 30px;
	height: 30px;
	fill: currentColor;
}

/* Контакты справа */

.site-header__contacts {
	display: flex;
	align-items: center;
	justify-self: end;
	gap: 46px;
	min-width: 0;
}

.site-header__email {
	font-size: 13px;
	line-height: 1.4;
	color: var(--vk-header-fg);
	overflow-wrap: anywhere;
	transition: opacity var(--vk-transition);
}

.site-header__email:hover {
	opacity: 0.75;
}

.site-header__cta {
	flex-shrink: 0;
}

/* Разделительная линия */

.site-header__divider {
	position: absolute;
	left: var(--vk-header-pad-x);
	right: var(--vk-header-pad-x);
	bottom: 0;
	z-index: 1;
	height: 1px;
	background: var(--vk-header-divider);
}

/* Меню */

.site-header__nav {
	display: flex;
	align-items: center;
	justify-content: center;
	min-height: var(--vk-header-bottom-h);
	padding: 10px var(--vk-header-pad-x);
}

.menu {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: center;
	gap: 0 33px;
	margin: 0;
	padding: 0;
	list-style: none;
}

.menu__item {
	display: flex;
	min-width: 0;
}

.menu__link {
	display: block;
	font-size: 14px;
	font-weight: 600;
	line-height: 1.3;
	letter-spacing: 0.5px;
	text-transform: uppercase;
	color: var(--vk-header-fg);
	overflow-wrap: anywhere;
	transition: color var(--vk-transition);
}

.menu__link:hover {
	color: var(--vk-header-muted);
}

.menu__link--current {
	color: var(--vk-header-muted);
}

/* Бургер */

.burger {
	display: none;
	flex-direction: column;
	justify-content: space-between;
	flex-shrink: 0;
	width: 28px;
	height: 32px;
	padding: 6px 0;
	border: 0;
	background: transparent;
	cursor: pointer;
}

.burger__line {
	display: block;
	width: 100%;
	height: 3px;
	background: currentColor;
	transition: transform var(--vk-transition), opacity var(--vk-transition);
}

.burger[aria-expanded="true"] .burger__line:nth-child(1) {
	transform: translateY(8.5px) rotate(45deg);
}

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

.burger[aria-expanded="true"] .burger__line:nth-child(3) {
	transform: translateY(-8.5px) rotate(-45deg);
}

/* Затемнение под выезжающей панелью */

.site-header__overlay {
	position: fixed;
	inset: 0;
	z-index: 99;
	background: rgba(0, 0, 0, 0.5);
}

/* Media */

@media (max-width: 1279px) {
	:root {
		--vk-header-pad-x: 24px;
		--vk-logo-w: 250px;
	}

	.site-header__contacts {
		gap: 24px;
	}
}

@media (max-width: 1159px) {
	.site-header__email {
		display: none;
	}
}

@media (max-width: 979px) {
	:root {
		--vk-header-pad-x: 20px;
	}

	.site-header {
		background: var(--vk-mobile-bg);
		color: var(--vk-mobile-fg);
	}

	.site-header__top {
		--vk-focus: #000000;
		display: flex;
		align-items: center;
		height: auto;
		min-height: var(--vk-mobile-h);
		overflow: visible;
	}

	.site-header__logo {
		justify-self: auto;
		max-width: calc(100% - 60px);
	}

	.site-header__logo-img {
		width: 240px;
	}

	.site-header__socials,
	.site-header__contacts,
	.site-header__divider {
		display: none;
	}

	.burger {
		display: flex;
		margin-left: auto;
	}

	.site-header__nav {
		position: fixed;
		left: 0;
		top: 0;
		bottom: 0;
		z-index: 100;
		display: block;
		width: min(320px, 85vw);
		padding: 80px 24px 32px;
		background: var(--vk-panel-bg);
		color: #ffffff;
		overflow-y: auto;
		overscroll-behavior: contain;
		visibility: hidden;
		transform: translateX(-100%);
		transition: transform 0.3s ease-in-out, visibility 0s 0.3s;
	}

	.site-header__nav[data-open="true"] {
		visibility: visible;
		transform: translateX(0);
		transition: transform 0.3s ease-in-out, visibility 0s;
	}

	.menu {
		flex-direction: column;
		align-items: stretch;
		justify-content: flex-start;
		gap: 4px;
	}

	.menu__link {
		padding: 10px 0;
		font-size: 18px;
		font-weight: 500;
		letter-spacing: 0.3px;
		text-transform: none;
		color: #ffffff;
	}

	.menu__link:hover,
	.menu__link--current {
		color: rgba(255, 255, 255, 0.8);
	}
}

@media (prefers-reduced-motion: reduce) {
	.site-header * {
		transition-duration: 0.01ms !important;
	}
}