/* Дрън-дрън — layout polish */

:root {
	--ink: #141820;
	--muted: #5a6472;
	--bg: #e9edf3;
	--bg-deep: #d5dce8;
	--surface: #f7f9fc;
	--line: rgba(20, 24, 32, 0.1);
	--accent: #d97706;
	--accent-ink: #7c2d12;
	--brand: #0f766e;
	--shadow: 0 14px 40px rgba(15, 23, 42, 0.07);
	--radius: 1.15rem;
	--font-ui: "Onest", system-ui, sans-serif;
	--font-display: "Literata", "Times New Roman", serif;
	--space: 1.25rem;
	--header-gap: 1.5rem;
}

*,
*::before,
*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
	margin: 0;
	min-height: 100vh;
	font-family: var(--font-ui);
	font-size: 1.05rem;
	line-height: 1.65;
	color: var(--ink);
	background: var(--bg);
	position: relative;
	overflow-x: hidden;
}

.site-bg {
	position: fixed;
	inset: 0;
	z-index: -1;
	pointer-events: none;
	background:
		radial-gradient(1100px 560px at 8% -8%, rgba(15, 118, 110, 0.14), transparent 55%),
		radial-gradient(900px 480px at 100% 0%, rgba(217, 119, 6, 0.12), transparent 50%),
		linear-gradient(165deg, #f4f6fa 0%, var(--bg) 45%, var(--bg-deep) 100%);
}

.site-bg::after {
	content: "";
	position: absolute;
	inset: 0;
	opacity: 0.3;
	background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.45'/%3E%3C/svg%3E");
	mix-blend-mode: soft-light;
}

a {
	color: var(--brand);
	text-decoration-thickness: 0.08em;
	text-underline-offset: 0.18em;
	transition: color 0.2s ease;
}

a:hover { color: var(--accent-ink); }

/* ===== Header ===== */

.site-header {
	padding: 1.5rem 0 0.75rem;
}

.site-header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: 1.25rem;
}

.brand {
	display: inline-flex;
	align-items: center;
	gap: 1.1rem;
	text-decoration: none !important;
	color: inherit;
	min-width: 0;
}

.brand:hover { color: inherit; }

.brand__logo {
	flex: 0 0 auto;
	width: 4.25rem;
	height: auto;
	border-radius: 0.85rem;
	box-shadow: var(--shadow);
}

.brand__name {
	font-family: var(--font-display);
	font-size: clamp(1.75rem, 3.8vw, 2.55rem);
	font-weight: 700;
	letter-spacing: -0.03em;
	line-height: 1.05;
	background: linear-gradient(120deg, var(--ink) 15%, var(--brand) 85%);
	-webkit-background-clip: text;
	background-clip: text;
	color: transparent;
}

.lang-menu {
	display: flex;
	align-items: center;
	gap: 0.5rem;
	flex: 0 0 auto;
}

.lang-menu > li {
	margin: 0;
	padding: 0;
	list-style: none;
}

.lang-menu a {
	display: inline-flex;
	padding: 0.4rem;
	border-radius: 999px;
	border: 1px solid transparent;
	text-decoration: none !important;
	line-height: 0;
}

.lang-menu a:hover,
.lang-menu li.active a {
	border-color: var(--line);
	background: rgba(255, 255, 255, 0.75);
}

.lang-menu img {
	display: block;
	width: 24px;
	height: 24px;
	border-radius: 3px;
}

/* ===== Nav ===== */

.site-nav {
	padding: 0.25rem 0 1.5rem;
}

.nav-toggle {
	display: inline-flex;
	flex-direction: column;
	justify-content: center;
	gap: 5px;
	width: 2.75rem;
	height: 2.75rem;
	padding: 0.55rem 0.6rem;
	border: 1px solid var(--line);
	border-radius: 0.85rem;
	background: rgba(255, 255, 255, 0.8);
	margin-bottom: 0.75rem;
}

.nav-toggle span {
	display: block;
	height: 2px;
	width: 100%;
	background: var(--ink);
	border-radius: 2px;
}

@media (min-width: 992px) {
	.nav-toggle { display: none; }
	#mainNav { display: block !important; height: auto !important; }
}

.main-menu {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0.4rem;
	width: 100%;
	margin: 0;
	padding: 0.45rem;
	list-style: none;
	border-radius: 1rem;
	background: rgba(255, 255, 255, 0.72);
	border: 1px solid var(--line);
	box-shadow: var(--shadow);
	backdrop-filter: blur(10px);
}

.main-menu > li {
	margin: 0;
	padding: 0;
	list-style: none;
}

.main-menu > li > a {
	display: block;
	padding: 0.6rem 1rem !important;
	border-radius: 0.75rem;
	color: var(--ink) !important;
	font-weight: 500;
	font-size: 0.95rem;
	line-height: 1.2;
	text-decoration: none !important;
	white-space: nowrap;
	transition: background 0.2s ease, color 0.2s ease;
}

.main-menu > li > a:hover,
.main-menu > li.active > a {
	background: var(--ink);
	color: #fff !important;
}

/* ===== Content layout ===== */

.site-main {
	padding-bottom: 3.5rem;
}

.content-shell {
	display: grid;
	grid-template-columns: 1fr;
	gap: 1.35rem;
	align-items: start;
}

@media (min-width: 992px) {
	.content-shell {
		grid-template-columns: 15.5rem minmax(0, 1fr);
		gap: 1.75rem;
	}

	/* Hide empty sidebar column */
	.content-shell:not(:has(.sub-menu .sub-menu__panel)) {
		grid-template-columns: minmax(0, 1fr);
	}

	.sub-menu:not(:has(.sub-menu__panel)) {
		display: none;
	}
}

.content-col {
	display: flex;
	flex-direction: column;
	gap: 0.85rem;
	min-width: 0;
}

.sub-menu {
	min-width: 0;
}

.sub-menu__panel {
	background: rgba(255, 255, 255, 0.78);
	border: 1px solid var(--line);
	border-radius: var(--radius);
	padding: 0.75rem;
	box-shadow: var(--shadow);
	backdrop-filter: blur(8px);
}

@media (min-width: 992px) {
	.sub-menu__panel {
		position: sticky;
		top: 1rem;
	}
}

.sub-menu .nav {
	display: flex;
	flex-direction: column;
	gap: 0.25rem;
	margin: 0;
	padding: 0;
}

.sub-menu .nav > li {
	margin: 0;
	padding: 0;
	list-style: none;
}

.sub-menu .nav a {
	display: block;
	padding: 0.55rem 0.75rem;
	border-radius: 0.7rem;
	color: var(--ink);
	text-decoration: none !important;
	font-size: 0.92rem;
	line-height: 1.35;
}

.sub-menu .nav li.active > a,
.sub-menu .nav a:hover {
	background: rgba(15, 118, 110, 0.12);
	color: var(--brand);
}

/* Breadcrumbs — fix glued items */

.breadcrumbs:empty { display: none; }

.breadcrumbs .breadcrumb {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 0;
	margin: 0;
	padding: 0.15rem 0.1rem;
	list-style: none;
	background: transparent;
	font-size: 0.9rem;
	color: var(--muted);
}

.breadcrumbs .breadcrumb > li {
	display: inline-flex;
	align-items: center;
	margin: 0;
	padding: 0;
	line-height: 1.3;
}

.breadcrumbs .breadcrumb > li + li::before {
	content: "/";
	display: inline-block;
	margin: 0 0.55rem;
	color: var(--muted);
	opacity: 0.55;
	font-weight: 500;
}

.breadcrumbs .breadcrumb > li.active {
	color: var(--ink);
	font-weight: 500;
}

.breadcrumbs .breadcrumb a {
	text-decoration: none;
}

.breadcrumbs .breadcrumb a:hover {
	text-decoration: underline;
}

/* Article */

.article {
	background: rgba(247, 249, 252, 0.94);
	border: 1px solid var(--line);
	border-radius: calc(var(--radius) + 0.1rem);
	padding: clamp(1.35rem, 3vw, 2.1rem);
	box-shadow: var(--shadow);
	backdrop-filter: blur(8px);
	width: 100%;
}

.article__title {
	font-family: var(--font-display);
	font-size: clamp(1.8rem, 3.6vw, 2.45rem);
	font-weight: 700;
	letter-spacing: -0.025em;
	line-height: 1.15;
	margin: 0 0 1.35rem;
	color: var(--ink);
}

.article__body {
	font-size: 1.05rem;
	color: #222833;
}

.article__body > *:first-child { margin-top: 0; }

.article__body img {
	max-width: 100%;
	height: auto;
	border-radius: 0.85rem;
	margin: 0.5rem 0 1rem;
}

.article__body h2,
.article__body h3 {
	font-family: var(--font-display);
	margin-top: 1.5em;
	margin-bottom: 0.5em;
}

.article__body p {
	margin: 0 0 1em;
}

.article__body ol,
.article__body ul {
	padding-left: 1.25rem;
	margin: 0 0 1em;
}

.article__body li + li { margin-top: 0.4rem; }

.article__meta {
	margin: 1.75rem 0 0;
	padding-top: 1rem;
	border-top: 1px solid var(--line);
	font-size: 0.8rem;
	color: var(--muted);
	text-align: right;
}

/* Contact */

#contactForm {
	max-width: 34rem;
	margin: 1.25rem 0 0;
}

#contactForm .mb-3 { margin-bottom: 1rem !important; }

#contactForm .form-label {
	display: block;
	margin-bottom: 0.4rem;
	font-weight: 600;
	font-size: 0.9rem;
}

#contactForm .form-control {
	border-radius: 0.75rem;
	border-color: var(--line);
	padding: 0.7rem 0.9rem;
}

#contactForm .form-control.error,
#contactForm .form-label.error { color: #b42318; }

#contactForm .form-control.error {
	border-color: #f04438;
	box-shadow: 0 0 0 3px rgba(240, 68, 56, 0.12);
}

#contactForm .btn-send {
	background: var(--ink);
	border: 0;
	color: #fff;
	border-radius: 999px;
	padding: 0.7rem 1.35rem;
	font-weight: 600;
}

#contactForm .btn-send:hover {
	background: var(--brand);
	color: #fff;
}

/* Footer */

.site-footer {
	margin-top: auto;
	padding: 2rem 0 2.5rem;
	border-top: 1px solid var(--line);
	background: rgba(255, 255, 255, 0.35);
}

.site-footer__inner {
	display: grid;
	gap: 0.85rem;
	font-size: 0.9rem;
	color: var(--muted);
}

@media (min-width: 768px) {
	.site-footer__inner {
		grid-template-columns: 1.3fr 1fr 1fr 1fr;
		align-items: center;
		gap: 1.25rem;
	}
}

.site-footer a { color: var(--muted); }
.site-footer a:hover { color: var(--brand); }

.loading-modal {
	border: 0;
	border-radius: 1rem;
	background: rgba(247, 249, 252, 0.96);
}

.loading-modal__text {
	color: var(--muted);
	font-size: 0.95rem;
}

/* Scroll top */

#scrollTop {
	position: fixed;
	right: 1.1rem;
	bottom: 1.1rem;
	z-index: 40;
	display: none;
	width: 2.75rem;
	height: 2.75rem;
	border-radius: 999px;
	border: 1px solid var(--line);
	background: rgba(255, 255, 255, 0.92);
	color: var(--ink);
	box-shadow: var(--shadow);
	align-items: center;
	justify-content: center;
	text-decoration: none !important;
}

#scrollTop:hover {
	color: var(--brand);
	background: #fff;
}

#scrollTop svg {
	width: 1.15rem;
	height: 1.15rem;
}

@media (prefers-reduced-motion: reduce) {
	html { scroll-behavior: auto; }
	*, *::before, *::after {
		animation: none !important;
		transition: none !important;
	}
}