.reference-layout {
	display:grid;
	grid-template-columns: 380px auto;
	grid-template-rows: 1fr;
	height: 100%;	
}

.reference-menu {
	display: flex;
	flex-direction: column;
	justify-content: flex-start;
	align-items: center;
}

.reference-content {
	display: block;	
}



/* ============================================================
   СТИЛИ ДЛЯ СПИСКА МАТЕРИАЛОВ
   ============================================================ */

.materials-content {
    padding: 20px;
}

.materials-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 2px solid #333;
    padding-bottom: 15px;
}

.materials-header h1 {
    font-size: 2rem;
    margin: 0;
    color: #fff;
}

.materials-count {
    color: #888;
    font-size: 0.9rem;
}

/* Сетка карточек материалов */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

/* Карточка материала */
.material-card {
    display: flex;
    flex-direction: column;
    background-color: #2a2a2a;
    border-radius: 10px;
    padding: 20px;
    text-decoration: none;
    color: #fff;
    transition: all 0.3s ease;
    border: 1px solid #3a3a3a;
    min-height: 200px;
}

.material-card:hover {
    transform: translateY(-4px);
    border-color: #ff6600;
    box-shadow: 0 4px 20px rgba(255, 102, 0, 0.2);
}

.material-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.material-card-header h3 {
    margin: 0;
    font-size: 1.1rem;
    color: #fff;
}

.material-standard {
    font-size: 0.7rem;
    color: #888;
    background: #1e1e1e;
    padding: 2px 8px;
    border-radius: 4px;
}

.material-card-body {
    flex: 1;
}

.material-properties {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px 16px;
    margin-bottom: 10px;
}

.property-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
}

.property-label {
    color: #888;
}

.property-value {
    color: #ccc;
}

.material-description {
    color: #aaa;
    font-size: 0.85rem;
    margin: 8px 0 0 0;
    line-height: 1.4;
}

.material-card-footer {
    margin-top: 12px;
    padding-top: 10px;
    border-top: 1px solid #3a3a3a;
}

.material-category {
    font-size: 0.75rem;
    color: #ff6600;
}

/* Пустое состояние */
.materials-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: #888;
    padding: 60px 20px;
    font-size: 1.2rem;
}
/* ============================================================
   БОКОВОЕ МЕНЮ (САЙДБАР) - АККОРДЕОН С ТИПАМИ МАТЕРИАЛОВ
   ============================================================ */

.sidebar-materials {
    padding: 10px 0;
}

/* ===== ПОИСК ===== */
.sidebar-search {
    margin-bottom: 20px;
}

.sidebar-search input {
    width: 100%;
    padding: 10px 12px;
    background-color: #2a2a2a;
    border: 1px solid #3a3a3a;
    border-radius: 6px;
    color: #fff;
    font-size: 0.9rem;
}

.sidebar-search input::placeholder {
    color: #666;
}

.sidebar-search input:focus {
    border-color: #ff6600;
    outline: none;
}

/* ===== ЗАГОЛОВОК "МАТЕРИАЛЫ" ===== */
.sidebar-types-header {
    font-weight: 600;
    color: #fff;
    padding: 8px 0 12px 0;
    border-bottom: 2px solid #3a3a3a;
    margin-bottom: 12px;
    font-size: 1rem;
    letter-spacing: 0.5px;
}

/* ===== ТИП МАТЕРИАЛА (Металлы, Пластики...) ===== */
.sidebar-type-item {
    margin-bottom: 4px;
}

.sidebar-type-toggle {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #ccc;
    background-color: transparent;
}

.sidebar-type-toggle:hover {
    background-color: #2a2a2a;
    color: #ff6600;
}

.sidebar-type-toggle .type-icon {
    margin-right: 10px;
    font-size: 1rem;
    width: 24px;
    text-align: center;
}

.sidebar-type-toggle .type-name {
    flex: 1;
    font-size: 0.95rem;
    font-weight: 500;
}

.sidebar-type-toggle .type-toggle-icon {
    font-size: 0.65rem;
    color: #666;
    transition: transform 0.3s ease;
    margin-left: 8px;
    display: inline-block;
}

.sidebar-type-toggle.open .type-toggle-icon {
    transform: rotate(90deg);
    color: #ff6600;
}

/* ===== СПИСОК КАТЕГОРИЙ ВНУТРИ ТИПА ===== */
.sidebar-category-list {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding-left: 20px;
}

.sidebar-category-list.open {
    max-height: 600px;
    padding: 4px 0 8px 20px;
}

.sidebar-category-list li {
    padding: 2px 0;
}

.sidebar-category-list li a {
    color: #999;
    text-decoration: none;
    font-size: 0.85rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 12px;
    border-radius: 4px;
    transition: all 0.2s ease;
}

.sidebar-category-list li a:hover {
    background-color: #2a2a2a;
    color: #fff;
}

.sidebar-category-list li.active a {
    color: #ff6600;
    background-color: #ff660022;
    border-left: 2px solid #ff6600;
}

/* Ссылка "Все металлы" */
.sidebar-category-list li:first-child a {
    font-weight: 500;
    color: #bbb;
}

.sidebar-category-list li:first-child.active a {
    color: #ff6600;
}

/* ===== СЧЁТЧИК КАТЕГОРИЙ ===== */
.category-count {
    color: #666;
    font-size: 0.7rem;
    background: #2a2a2a;
    padding: 1px 8px;
    border-radius: 10px;
}

.sidebar-category-list li a:hover .category-count {
    color: #ff6600;
}

/* ===== ПУСТОЕ СООБЩЕНИЕ ===== */
.empty-message {
    color: #555;
    font-size: 0.8rem;
    padding: 6px 12px;
    font-style: italic;
}

/* ===== ФИЛЬТРЫ ===== */
.sidebar-filters {
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid #3a3a3a;
}

.sidebar-filter-header {
    font-weight: 600;
    color: #fff;
    padding: 4px 0 8px 0;
    font-size: 0.9rem;
}

.filter-group {
    margin-bottom: 12px;
}

.filter-group label {
    display: block;
    color: #aaa;
    font-size: 0.8rem;
    margin-bottom: 4px;
}

.filter-range input[type="range"] {
    width: 100%;
    accent-color: #ff6600;
    background: #2a2a2a;
    height: 4px;
    border-radius: 2px;
}

/* ===== АДАПТИВ ===== */
@media (max-width: 768px) {
    .sidebar-type-toggle {
        padding: 8px 10px;
        font-size: 0.9rem;
    }
    
    .sidebar-category-list {
        padding-left: 12px;
    }
    
    .sidebar-category-list li a {
        font-size: 0.8rem;
        padding: 4px 10px;
    }
}

@media (max-width: 780px) {
    .reference-menu{
        display: none;
    }

}


/* ===== АКТИВНОЕ СОСТОЯНИЕ БЕЗ АНИМАЦИИ (для загрузки) ===== */
.sidebar-category-list.active-open {
    max-height: 600px;
    padding: 4px 0 8px 20px;
    transition: none; /* ← отключаем анимацию при загрузке */
}

.sidebar-type-toggle.active-open .type-toggle-icon {
    transform: rotate(90deg);
    color: #ff6600;
}

/* ============================================================
   МОБИЛЬНАЯ АДАПТАЦИЯ КАРТОЧЕК МАТЕРИАЛОВ
   ============================================================ */

@media (max-width: 768px) {
    /* Основной контент */
    .materials-content {
        padding: 12px 10px;
    }

    .materials-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        margin-bottom: 20px;
        padding-bottom: 12px;
    }

    .materials-header h1 {
        font-size: 1.4rem;
    }

    .materials-count {
        font-size: 0.8rem;
    }

    /* Карточки в 1 колонку */
    .materials-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .material-card {
        padding: 14px 16px;
        min-height: auto;
        border-radius: 8px;
    }

    .material-card:hover {
        transform: translateY(-2px);
    }

    .material-card-header h3 {
        font-size: 1rem;
    }

    .material-standard {
        font-size: 0.6rem;
        padding: 1px 6px;
    }

    .material-properties {
        grid-template-columns: 1fr 1fr;
        gap: 2px 12px;
    }

    .property-item {
        font-size: 0.75rem;
    }

    .material-description {
        font-size: 0.8rem;
        margin-top: 6px;
        /* Ограничиваем описание 3 строками */
        display: -webkit-box;
        -webkit-line-clamp: 3;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    .material-card-footer {
        margin-top: 8px;
        padding-top: 8px;
    }

    .material-category {
        font-size: 0.7rem;
    }
}

/* ============================================================
   МОБИЛЬНАЯ АДАПТАЦИЯ КАРТОЧЕК (ОЧЕНЬ МАЛЕНЬКИЕ ЭКРАНЫ)
   ============================================================ */

@media (max-width: 480px) {
    .materials-content {
        padding: 8px 6px;
    }

    .materials-header h1 {
        font-size: 1.2rem;
    }

    .material-card {
        padding: 12px 14px;
        border-radius: 6px;
    }

    .material-card-header h3 {
        font-size: 0.9rem;
    }

    .material-properties {
        grid-template-columns: 1fr;
        gap: 2px;
    }

    .property-item {
        font-size: 0.7rem;
        padding: 2px 0;
    }

    .material-description {
        font-size: 0.75rem;
        -webkit-line-clamp: 2;
    }

    .material-card-footer {
        margin-top: 6px;
        padding-top: 6px;
    }
}

/* ============================================================
   ДЕСКТОПНАЯ АДАПТАЦИЯ (для средних экранов)
   ============================================================ */

@media (min-width: 769px) and (max-width: 1024px) {
    .materials-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .material-card {
        padding: 16px 18px;
        min-height: 180px;
    }

    .material-card-header h3 {
        font-size: 1rem;
    }
}

@media (min-width: 1025px) and (max-width: 1400px) {
    .materials-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 18px;
    }
}

/* ============================================================
   МОБИЛЬНАЯ КНОПКА "ФИЛЬТРЫ"
   ============================================================ */

.mobile-filter-btn-wrapper {
    display: none;
    margin-bottom: 12px;
}

.mobile-filter-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 16px;
    background-color: #2a2a2a;
    border: 1px solid #3a3a3a;
    border-radius: 8px;
    color: #fff;
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.mobile-filter-btn:hover {
    background-color: #3a3a3a;
    border-color: #ff6600;
}

.mobile-filter-btn .filter-icon {
    font-size: 1.2rem;
}

/* Показываем только на мобилках */
@media (max-width: 780px) {
    .mobile-filter-btn-wrapper {
        display: block;
    }
}

/* На десктопе скрываем */
@media (min-width: 781px) {
    .mobile-filter-btn-wrapper {
        display: none !important;
    }
}