/* =========================================================
   KNOWLEDGE BASE — Общие стили (Mobile First)
   ========================================================= */

/* ---------- Переменные ---------- */
:root {
    --kb-bg: #f5f7fa;
    --kb-card: #ffffff;
    --kb-text: #101828;
    --kb-text-soft: #344054;
    --kb-muted: #667085;
    --kb-border: #e4e7ec;
    --kb-border-light: #edf0f4;
    --kb-primary: #0a6ed1;
    --kb-primary-dark: #0659ab;
    --kb-primary-light: #eef5fd;
    --kb-primary-border: #c5daf5;
    --kb-hover: #f6f9fd;
    --kb-shadow-xs: 0 2px 6px rgba(16, 24, 40, 0.03);
    --kb-shadow: 0 8px 30px rgba(16, 24, 40, 0.045);
    --kb-shadow-lg: 0 16px 48px rgba(16, 24, 40, 0.07);
    --kb-radius-sm: 8px;
    --kb-radius: 16px;
    --kb-radius-lg: 22px;
    --kb-container: 1400px;
}

/* ---------- Базовые стили ---------- */
.knowledge-page,
.knowledge-article-page {
    background: var(--kb-bg);
    color: var(--kb-text);
    font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.knowledge-page *,
.knowledge-page *::before,
.knowledge-page *::after,
.knowledge-article-page *,
.knowledge-article-page *::before,
.knowledge-article-page *::after {
    box-sizing: border-box;
}

/* ---------- Контейнер ---------- */
.kb-container {
    width: 100%;
    max-width: var(--kb-container);
    margin: 0 auto;
    padding-left: 16px;
    padding-right: 16px;
}

.knowledge-page .kb-container:first-of-type,
.knowledge-article-page .kb-container:first-of-type {
    padding-top: 16px;
}

/* ---------- Сетка layout (Mobile First) ---------- */
.kb-layout {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding: 20px 0 50px;
}

/* =========================================================
   САЙДБАР
   ========================================================= */
.kb-sidebar {
    position: relative;
    top: auto;
    width: 100%;
    background: var(--kb-card);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow-xs);
    padding: 20px 16px;
    overflow: visible;
    z-index: 5;
    margin-bottom: 0;
}

.kb-sidebar-header {
    margin: 0;
    padding: 0 2px 16px;
    border-bottom: 1px solid var(--kb-border-light);
}

.kb-sidebar-header h2 {
    margin: 0;
    font-size: 20px;
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: -0.025em;
    color: var(--kb-text);
}

/* ---------- Поиск ---------- */
.kb-search {
    margin-top: 18px;
    position: relative;
}

.kb-search::before {
    content: "";
    position: absolute;
    left: 14px;
    top: 50%;
    width: 14px;
    height: 14px;
    transform: translateY(-50%);
    border: 1.7px solid var(--kb-muted);
    border-radius: 50%;
    pointer-events: none;
    z-index: 1;
}

.kb-search::after {
    content: "";
    position: absolute;
    left: 27px;
    top: calc(50% + 5px);
    width: 6px;
    height: 1.7px;
    background: var(--kb-muted);
    transform: rotate(45deg);
    transform-origin: left center;
    pointer-events: none;
    z-index: 1;
}

.kb-search input {
    display: block;
    width: 100%;
    height: 44px;
    margin: 0;
    padding: 0 13px 0 40px;
    border: 1px solid var(--kb-border);
    border-radius: 11px;
    background: #fff;
    color: var(--kb-text);
    font-family: inherit;
    font-size: 16px;
    line-height: 44px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.kb-search input::placeholder {
    color: #98a2b3;
}

.kb-search input:hover {
    border-color: #d0d5dd;
}

.kb-search input:focus {
    border-color: var(--kb-primary);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(10, 110, 209, 0.09);
}

/* ---------- Заголовки категорий ---------- */
.kb-category-title {
    display: none;
}

/* =========================================================
   КАТЕГОРИИ С ИКОНКАМИ
   ========================================================= */
.kb-categories {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin: 20px 0 0;
    padding: 0;
}

.kb-categories li {
    display: block;
    margin: 0;
    padding: 0;
    flex: 1 1 auto;
}

.kb-categories a {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 44px;
    padding: 10px 12px 10px 38px;
    border-radius: 10px;
    color: var(--kb-text-soft);
    font-size: 14px;
    font-weight: 600;
    line-height: 1.3;
    text-decoration: none;
    white-space: nowrap;
    transition: background 0.2s ease, color 0.2s ease;
    border: 1px solid var(--kb-border-light);
    background: #fafbfc;
}

.kb-categories a::before {
    content: "" !important;
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px !important;
    height: 18px !important;
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    filter: brightness(0.4) !important;
    flex: 0 0 auto !important;
    margin-right: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    transition: filter 0.2s ease;
}

.kb-categories a[data-category="all"]::before {
    background-image: url('/assets/svg/materials.svg') !important;
}
.kb-categories a[data-category="article"]::before {
    background-image: url('/assets/svg/article.svg') !important;
}
.kb-categories a[data-category="guide"]::before {
    background-image: url('/assets/svg/maintenance-documents.svg') !important;
}
.kb-categories a[data-category="review"]::before {
    background-image: url('/assets/svg/review.svg') !important;
}
.kb-categories a[data-category="news"]::before {
    background-image: url('/assets/svg/news.svg') !important;
}

.kb-categories a:hover {
    background: var(--kb-hover);
    color: var(--kb-primary);
    border-color: var(--kb-primary-border);
}
.kb-categories a:hover::before {
    filter: invert(27%) sepia(94%) saturate(1934%) hue-rotate(197deg) brightness(97%) contrast(101%) !important;
}

.kb-categories .active a {
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    font-weight: 700;
    border-color: var(--kb-primary-border);
}
.kb-categories .active a::before {
    filter: invert(27%) sepia(94%) saturate(1934%) hue-rotate(197deg) brightness(97%) contrast(101%) !important;
}

/* ---------- Разделитель ---------- */
.kb-divider {
    width: 100%;
    height: 1px;
    margin: 20px 0 16px;
    background: var(--kb-border);
}

/* =========================================================
   СПИСОК МАТЕРИАЛОВ (сайдбар)
   ========================================================= */
.kb-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 0;
    padding: 0;
}

.kb-list-item {
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border-radius: 11px;
    overflow: hidden;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

.kb-list-item[hidden] {
    display: none !important;
}

.kb-list-link {
    display: grid;
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 14px;
    width: 100%;
    padding: 10px;
    border: 1px solid var(--kb-border-light);
    border-radius: 12px;
    background: #fff;
    color: inherit;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.kb-list-link:hover {
    background: #f8fafc;
    border-color: #d0d5dd;
    box-shadow: var(--kb-shadow-xs);
}

.kb-list-item.active .kb-list-link {
    background: var(--kb-primary-light);
    border-color: #b8d6f7;
}

.kb-list-image {
    width: 64px;
    height: 64px;
    border-radius: 10px;
    overflow: hidden;
    background: #f2f4f7;
    flex: none;
}

.kb-list-image img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.kb-list-info {
    min-width: 0;
    padding: 2px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.kb-list-type {
    margin: 0 0 4px;
    font-size: 10px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--kb-primary);
}

.kb-list-title,
.kb-list-info h3 {
    display: -webkit-box;
    margin: 0;
    overflow: hidden;
    color: var(--kb-text);
    font-size: 14px;
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.01em;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.kb-list-date {
    margin-top: 6px;
    font-size: 11px;
    line-height: 1.2;
    color: #98a2b3;
}

.kb-list-description {
    display: none;
}

/* =========================================================
   HERO (только для главной страницы базы знаний)
   ========================================================= */
.knowledge-page .kb-main {
    min-width: 0;
    width: 100%;
}

.knowledge-page .kb-intro-card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: auto;
    width: 100%;
    padding: 32px 24px;
    background: var(--kb-card);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow);
    overflow: hidden;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
}


.kb-intro-text {
    position: relative;
    z-index: 1;
    min-width: 0;
}

.knowledge-page .kb-label {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    height: 28px;
    padding: 0 12px;
    border: 1px solid var(--kb-primary-border);
    border-radius: var(--kb-radius-sm);
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    font-size: 11px;
    font-weight: 800;
    line-height: 28px;
    letter-spacing: 0.07em;
    text-transform: uppercase;
}

.knowledge-page .kb-intro h1 {
    position: relative;
    z-index: 1;
    max-width: 100%;
    margin: 18px 0 14px;
    color: var(--kb-text);
    font-size: 28px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.03em;
}

.knowledge-page .kb-intro p {
    position: relative;
    z-index: 1;
    max-width: 100%;
    margin: 0;
    color: var(--kb-muted);
    font-size: 15px;
    font-weight: 400;
    line-height: 1.65;
}

.knowledge-page .kb-stats {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 620px;
    margin-top: 24px;
}

.knowledge-page .kb-stats div {
    min-width: 0;
    padding: 16px 18px;
    border: 1px solid var(--kb-border-light);
    border-radius: 12px;
    background: #f8fafc;
}

.knowledge-page .kb-stats strong {
    display: block;
    margin: 0;
    color: var(--kb-primary);
    font-size: 24px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
}

.knowledge-page .kb-stats span {
    display: block;
    margin-top: 4px;
    color: var(--kb-muted);
    font-size: 12px;
    line-height: 1.4;
}

/* =========================================================
   СЕКЦИЯ МАТЕРИАЛОВ (основная сетка на главной)
   ========================================================= */
.kb-materials {
    margin-top: 32px;
}

.kb-materials h2 {
    margin: 0 0 20px;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.kb-materials-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.kb-material-card {
    display: flex;
    flex-direction: column;
    background: #fff;
    border: 1px solid var(--kb-border-light);
    border-radius: 12px;
    padding: 16px;
    transition: box-shadow 0.2s, transform 0.2s;
    text-decoration: none;
    color: inherit;
}

.kb-material-card:hover {
    box-shadow: var(--kb-shadow);
    transform: translateY(-2px);
}

.kb-material-card .kb-list-image {
    width: 100%;
    height: 140px;
    margin-bottom: 12px;
}

.kb-material-card .kb-list-info {
    flex: 1;
}

/* =========================================================
   КНОПКИ
   ========================================================= */
.kb-show-more-btn {
    display: block;
    width: 100%;
    margin-top: 12px;
    padding: 10px 12px;
    border: 1px solid var(--kb-border);
    border-radius: 10px;
    background: #f8fafc;
    color: var(--kb-text-soft);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    line-height: 1.4;
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.kb-show-more-btn:hover {
    background: var(--kb-hover);
    border-color: #d0d5dd;
    color: var(--kb-primary);
}

.kb-show-more-btn:active {
    transform: translateY(1px);
}

#kbShowAllMaterialsBtn {
    display: block;
    margin: 24px auto 0;
    max-width: 300px;
}

/* =========================================================
   МОДАЛКА ИЗОБРАЖЕНИЙ
   ========================================================= */
.kb-image-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    visibility: hidden;
    opacity: 0;
    z-index: 99999;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.kb-image-modal.active {
    visibility: visible;
    opacity: 1;
}

.kb-image-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(6px);
}

.kb-image-dialog {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: 100%;
    max-height: 85vh;
}

.kb-image-dialog img {
    display: block;
    max-width: 100%;
    max-height: 80vh;
    width: auto;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
    object-fit: contain;
}

.kb-image-close {
    position: absolute;
    top: -40px;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.9);
    color: #101828;
    font-family: Arial, sans-serif;
    font-size: 22px;
    font-weight: 400;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    z-index: 3;
}

.kb-image-close:hover {
    background: #fff;
}

body.kb-modal-open {
    overflow: hidden;
}

/* =========================================================
   УТИЛИТЫ СКРЫТИЯ
   ========================================================= */
.kb-list-item.kb-hidden-by-limit,
.kb-material-card.kb-hidden-by-limit,
.kb-material-card.kb-filter-hidden {
    display: none !important;
}

/* =========================================================
   АДАПТИВНОСТЬ
   ========================================================= */

/* ---------- Планшеты (≥ 600px) ---------- */
@media (min-width: 600px) {
    .kb-container {
        padding-left: 20px;
        padding-right: 20px;
    }

    .kb-sidebar {
        padding: 22px 18px;
    }

    .kb-categories {
        flex-wrap: nowrap;
    }

    .kb-categories a {
        font-size: 13px;
        min-height: 42px;
    }

    .knowledge-page .kb-intro-card {
        padding: 40px;
    }

    .knowledge-page .kb-intro h1 {
        font-size: 32px;
    }

    .knowledge-page .kb-stats {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 12px;
    }
}

/* ---------- Десктопы (≥ 980px) ---------- */
@media (min-width: 980px) {
    .kb-container {
        padding-left: 24px;
        padding-right: 24px;
    }

    .kb-layout {
        display: grid;
        grid-template-columns: 300px minmax(0, 1fr);
        gap: 28px;
        align-items: start;
        padding: 28px 0 70px;
    }

    .kb-sidebar {
        position: sticky;
        top: 24px;
        width: 100%;
        padding: 22px 18px;
        overflow: hidden;
        border-radius: var(--kb-radius);
    }

    .kb-categories {
        display: flex;
        flex-direction: column;
        gap: 3px;
    }

    .kb-categories a {
        justify-content: flex-start;
        border: none;
        background: transparent;
        min-height: 39px;
        font-size: 13px;
        font-weight: 500;
        padding: 8px 11px 8px 42px;
    }

    .kb-categories a::before {
        width: 20px !important;
        height: 20px !important;
        left: 11px;
    }

    .kb-categories .active a {
        border: none;
    }

    .kb-divider,
    .kb-category-title {
        display: block;
    }

    .kb-category-title {
        margin: 22px 2px 10px;
        font-size: 10px;
        line-height: 1.3;
        font-weight: 800;
        letter-spacing: 0.11em;
        text-transform: uppercase;
        color: var(--kb-muted);
    }

    .kb-list {
        gap: 5px;
    }

    .kb-list-link {
        padding: 9px;
        grid-template-columns: 58px minmax(0, 1fr);
        gap: 11px;
        border-color: transparent;
        background: transparent;
    }

    .kb-list-image {
        width: 58px;
        height: 58px;
    }

    .kb-list-title,
    .kb-list-info h3 {
        font-size: 12px;
    }

    /* Hero */
    .knowledge-page .kb-intro-card {
        padding: 58px 62px;
        min-height: 520px;
        border-radius: var(--kb-radius-lg);
    }

    .knowledge-page .kb-intro h1 {
        font-size: 43px;
        max-width: 680px;
    }

    .knowledge-page .kb-intro p {
        font-size: 16px;
        max-width: 500px;
    }

    .knowledge-page .kb-stats {
        max-width: 620px;
        margin-top: 42px;
    }

    /* Сетка материалов */
    .kb-materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
}