/* ==================== ОСНОВНАЯ СТРУКТУРА ==================== */

.wrapper {
	min-width: 320px;
	position: relative;
	background: var(--bg-secondary);
}

.wrapper-container {
	max-width: var(--max-width);
	margin: 0 auto;
	padding: 0 var(--spacing-md);
}

.wrapper-main {
	min-height: 100vh;
	display: flex;
	flex-direction: column;
}

.content {
	flex: 1;
	padding: var(--spacing-xl) 0;
}

/* ==================== HEADER - ОБРАЗОВАТЕЛЬНЫЙ СТИЛЬ ==================== */

.header {
	position: sticky;
	top: 0;
	z-index: 1000;
	background: var(--bg-overlay);
	backdrop-filter: blur(20px);
	-webkit-backdrop-filter: blur(20px);
	border-bottom: 2px solid var(--border-color);
	padding: var(--spacing-md) 0;
	margin-bottom: var(--spacing-xl);
	box-shadow: var(--shadow-sm);
}

.header__inner {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--spacing-lg);
	flex-wrap: wrap;
}

.logo {
	font-size: 28px;
	font-weight: 800;
	color: var(--primary);
	display: flex;
	align-items: center;
	gap: 8px;
	text-decoration: none;
	transition: var(--transition);
}

.logo::before {
	content: '📚';
	font-size: 32px;
}

.logo:hover {
	transform: scale(1.05);
}

.logo span {
	color: var(--secondary);
	font-weight: 400;
}

/* ПОИСК */
.search-block {
	position: relative;
	flex: 1;
	max-width: 500px;
}

.search-block form {
	position: relative;
}

.search-block__input {
	padding: 14px 50px 14px 20px;
	background: var(--bg-card);
	border: 2px solid var(--border-color);
	border-radius: var(--border-radius-full);
	color: var(--text-primary);
	font-size: 15px;
	transition: var(--transition);
	width: 100%;
}

.search-block__input:focus {
	border-color: var(--primary);
	box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.search-block__btn {
	position: absolute;
	right: 4px;
	top: 50%;
	transform: translateY(-50%);
	width: 42px;
	height: 42px;
	padding: 0;
	background: var(--bg-gradient);
	border-radius: var(--border-radius-full);
	display: flex;
	align-items: center;
	justify-content: center;
	border: none;
	cursor: pointer;
	box-shadow: var(--shadow-md);
	transition: var(--transition);
}

.search-block__btn:hover {
	transform: translateY(-50%) scale(1.1);
	box-shadow: var(--shadow-lg);
}

/* НАВИГАЦИЯ */
.nav {
	background: var(--bg-card);
	border-radius: var(--border-radius-lg);
	padding: var(--spacing-sm);
	margin-bottom: var(--spacing-xl);
	border: 2px solid var(--border-color);
	box-shadow: var(--shadow-sm);
}

.nav__list {
	display: flex;
	align-items: center;
	gap: var(--spacing-xs);
	flex-wrap: wrap;
	list-style: none;
}

.nav__list > li > a {
	display: flex;
	align-items: center;
	padding: 10px 20px;
	color: var(--text-secondary);
	font-size: 15px;
	font-weight: 600;
	border-radius: var(--border-radius);
	transition: var(--transition);
	position: relative;
}

.nav__list > li > a::before {
	content: '';
	position: absolute;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
	width: 0;
	height: 3px;
	background: var(--bg-gradient);
	transition: var(--transition);
}

.nav__list > li > a:hover {
	color: var(--primary);
	background: var(--bg-secondary);
}

.nav__list > li > a:hover::before {
	width: calc(100% - 40px);
}

.nav__list-hidden {
	position: absolute;
	top: 100%;
	left: 0;
	background: var(--bg-card);
	border: 2px solid var(--border-color);
	border-radius: var(--border-radius);
	padding: var(--spacing-sm);
	margin-top: var(--spacing-xs);
	min-width: 250px;
	opacity: 0;
	visibility: hidden;
	transform: translateY(-10px);
	transition: var(--transition);
	z-index: 100;
	list-style: none;
	box-shadow: var(--shadow-lg);
}

.nav__list > li:hover .nav__list-hidden {
	opacity: 1;
	visibility: visible;
	transform: translateY(0);
}

/* СЕТКА КОНТЕНТА */
.cols {
	display: grid;
	grid-template-columns: var(--sidebar-width) 1fr var(--sidebar-width);
	gap: var(--spacing-xl);
	margin-bottom: var(--spacing-2xl);
}

.col-main {
	min-width: 0;
}

.col-side {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-lg);
}

/* КАРТОЧКИ */
.card {
	background: var(--bg-card);
	border: 2px solid var(--border-color);
	border-radius: var(--border-radius-lg);
	padding: var(--spacing-lg);
	transition: var(--transition);
	position: relative;
	overflow: hidden;
}

.card::before {
	content: '';
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	height: 4px;
	background: var(--bg-gradient);
	opacity: 0;
	transition: var(--transition);
}

.card:hover {
	border-color: var(--primary);
	transform: translateY(-4px);
	box-shadow: var(--shadow-education);
}

.card:hover::before {
	opacity: 1;
}

/* КАРТОЧКИ МАТЕРИАЛОВ */
.content-block {
	display: grid;
	gap: var(--spacing-lg);
}

.content-block--bg {
	background: var(--bg-card);
	border: 2px solid var(--border-color);
	border-radius: var(--border-radius-lg);
	padding: var(--spacing-xl);
}

.short {
	background: var(--bg-card);
	border: 2px solid var(--border-color);
	border-radius: var(--border-radius-lg);
	overflow: hidden;
	transition: var(--transition);
	display: flex;
	flex-direction: column;
	position: relative;
}

.short:hover {
	border-color: var(--primary);
	transform: translateY(-6px);
	box-shadow: var(--shadow-education);
}

.short__img {
	width: 100%;
	height: 220px;
	overflow: hidden;
	position: relative;
}

.short__img img {
	width: 100%;
	height: 100%;
	object-fit: cover;
	transition: var(--transition-slow);
}

.short:hover .short__img img {
	transform: scale(1.1);
}

.short__header {
	padding: var(--spacing-lg);
}

.short__title {
	font-size: 20px;
	font-weight: 700;
	margin-bottom: var(--spacing-sm);
	line-height: 1.4;
}

.short__title a {
	color: var(--text-primary);
	transition: var(--transition);
}

.short__title a:hover {
	color: var(--primary);
}

.short__meta {
	display: flex;
	align-items: center;
	gap: var(--spacing-md);
	font-size: 13px;
	color: var(--text-tertiary);
	flex-wrap: wrap;
}

.short__meta-item {
	display: flex;
	align-items: center;
	gap: 6px;
}

.short__desc {
	padding: 0 var(--spacing-lg) var(--spacing-lg);
	margin-top: auto;
}

.short__text {
	color: var(--text-secondary);
	font-size: 15px;
	line-height: 1.7;
	margin-bottom: var(--spacing-md);
	display: -webkit-box;
	-webkit-line-clamp: 3;
	line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.short__btn {
	width: 44px;
	height: 44px;
	padding: 0;
	background: var(--bg-gradient);
	border-radius: var(--border-radius-full);
	display: flex;
	align-items: center;
	justify-content: center;
	border: none;
	cursor: pointer;
	box-shadow: var(--shadow-md);
	transition: var(--transition);
	margin-left: auto;
}

.short__btn:hover {
	transform: scale(1.1);
	box-shadow: var(--shadow-lg);
}

/* САЙДБАР */
.side-nav {
	list-style: none;
	display: flex;
	flex-direction: column;
	gap: var(--spacing-xs);
}

.side-nav li a {
	display: flex;
	align-items: center;
	padding: 12px 16px;
	color: var(--text-secondary);
	font-size: 15px;
	font-weight: 500;
	border-radius: var(--border-radius);
	transition: var(--transition);
}

.side-nav li a:hover {
	background: var(--bg-secondary);
	color: var(--primary);
}

.side-block {
	background: var(--bg-card);
	border: 2px solid var(--border-color);
	border-radius: var(--border-radius-lg);
	padding: var(--spacing-lg);
}

.side-block__title {
	font-size: 18px;
	font-weight: 700;
	color: var(--text-primary);
	margin-bottom: var(--spacing-md);
	padding-bottom: var(--spacing-sm);
	border-bottom: 3px solid var(--border-color);
	position: relative;
}

.side-block__title::after {
	content: '';
	position: absolute;
	bottom: -3px;
	left: 0;
	width: 60px;
	height: 3px;
	background: var(--bg-gradient);
}

.side-block__content {
	display: flex;
	flex-direction: column;
	gap: var(--spacing-md);
}

/* FOOTER */
.footer {
	background: var(--bg-card);
	border-top: 2px solid var(--border-color);
	padding: var(--spacing-xl) 0;
	margin-top: var(--spacing-2xl);
	box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05);
}

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

.footer__logo {
	font-size: 24px;
	font-weight: 800;
	color: var(--primary);
}

.footer__text {
	color: var(--text-secondary);
	font-size: 14px;
}

.footer__text a {
	color: var(--primary);
}

.footer__text a:hover {
	color: var(--secondary);
}

/* КНОПКА НАВЕРХ */
#scrolltop {
	position: fixed;
	bottom: var(--spacing-lg);
	right: var(--spacing-lg);
	width: 56px;
	height: 56px;
	background: var(--bg-gradient);
	border-radius: var(--border-radius-full);
	display: none;
	align-items: center;
	justify-content: center;
	cursor: pointer;
	box-shadow: var(--shadow-lg);
	transition: var(--transition);
	z-index: 999;
	border: none;
}

#scrolltop:hover {
	transform: translateY(-4px) scale(1.1);
	box-shadow: var(--shadow-xl);
}

/* ДОПОЛНИТЕЛЬНЫЕ СТИЛИ */
.sect__header {
	display: flex;
	align-items: center;
	justify-content: space-between;
	gap: var(--spacing-lg);
	margin-bottom: var(--spacing-xl);
}

.sect__title {
	font-size: 36px;
	font-weight: 800;
	color: var(--text-primary);
}

.speedbar {
	font-size: 14px;
	color: var(--text-tertiary);
	margin-bottom: var(--spacing-lg);
}

.speedbar a {
	color: var(--primary);
}

.speedbar a:hover {
	color: var(--secondary);
}

.d-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
	gap: var(--spacing-lg);
}

.grid-item {
	grid-column: span 1;
}

/* ОБРАЗОВАТЕЛЬНЫЕ БЛОКИ */
.education-badge {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	padding: 6px 12px;
	background: var(--bg-gradient);
	color: var(--text-light);
	border-radius: var(--border-radius-sm);
	font-size: 12px;
	font-weight: 600;
	text-transform: uppercase;
	letter-spacing: 0.5px;
}

.education-icon {
	width: 24px;
	height: 24px;
	display: flex;
	align-items: center;
	justify-content: center;
	background: rgba(255, 255, 255, 0.2);
	border-radius: var(--border-radius-sm);
}

/* АДАПТИВНОСТЬ */
@media (max-width: 1200px) {
	.cols {
		grid-template-columns: 240px 1fr 240px;
		gap: var(--spacing-lg);
	}
}

@media (max-width: 992px) {
	.cols {
		grid-template-columns: 1fr;
	}
	
	.col-side {
		order: 2;
	}
	
	.header__inner {
		flex-wrap: wrap;
	}
	
	.search-block {
		max-width: 100%;
		order: 3;
		width: 100%;
	}
	
	.d-grid {
		grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
	}
}

@media (max-width: 768px) {
	:root {
		--container-padding: 20px;
	}
	
	h1 { font-size: 2rem; }
	h2 { font-size: 1.75rem; }
	h3 { font-size: 1.5rem; }
	
	.header {
		padding: var(--spacing-sm) 0;
	}
	
	.content {
		padding: var(--spacing-lg) 0;
	}
	
	.nav__list {
		flex-direction: column;
		align-items: stretch;
	}
	
	.nav__list > li > a {
		width: 100%;
		justify-content: center;
	}
	
	.d-grid {
		grid-template-columns: 1fr;
	}
	
	.sect__header {
		flex-direction: column;
		align-items: flex-start;
	}
}