/* =========================================================
   KNOWLEDGE BASE — Общие стили
   Сайдбар, сетка, модалки, просмотрщик изображений
   ========================================================= */

: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 для всех страниц базы знаний --- */
.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: 24px;
    padding-right: 24px;
}

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

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

/* =========================================================
   САЙДБАР — ЕДИНЫЙ ДЛЯ ВСЕХ СТРАНИЦ
   ========================================================= */
.kb-sidebar {
    position: sticky;
    top: 24px;
    width: 100%;
    background: var(--kb-card);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius);
    box-shadow: var(--kb-shadow-xs);
    padding: 22px 18px;
    overflow: hidden;
    z-index: 5;
}

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

.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: 13px;
    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);
}

/* Заголовок категории */
.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);
}

/* =========================================================
   КАТЕГОРИИ С ИКОНКАМИ (иконки меняют цвет при наведении/активном)
   ========================================================= */
.kb-categories {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 3px;
    margin: 0;
    padding: 0;
}

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

.kb-categories a {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
    min-height: 39px;
    padding: 8px 11px 8px 42px;
    border-radius: 9px;
    color: var(--kb-text-soft);
    font-size: 13px;
    font-weight: 500;
    line-height: 1.3;
    text-decoration: none;
    transition: background 0.2s ease, color 0.2s ease;
}

/* Базовое состояние иконки — серый цвет */
.kb-categories a::before {
    content: "" !important;
    position: absolute;
    left: 11px;
    top: 50%;
    transform: translateY(-50%);
    width: 20px !important;
    height: 20px !important;
    background-size: contain !important;
    background-repeat: no-repeat !important;
    background-position: center !important;
    filter: brightness(0.4) !important; /* серый */
    flex: 0 0 auto !important;
    margin-right: 0 !important;
    border: none !important;
    border-radius: 0 !important;
    transition: filter 0.2s ease;
}

/* Иконки для каждой категории */
.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;
}

/* При наведении на ссылку — иконка становится голубой, текст тоже голубой */
.kb-categories a:hover {
    background: var(--kb-hover);
    color: var(--kb-primary);
}
.kb-categories a:hover::before {
    filter: invert(27%) sepia(94%) saturate(1934%) hue-rotate(197deg) brightness(97%) contrast(101%) !important; /* голубой #0a6ed1 */
}

/* Активная категория — иконка и текст голубые */
.kb-categories .active a {
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    font-weight: 700;
}
.kb-categories .active a::before {
    filter: invert(27%) sepia(94%) saturate(1934%) hue-rotate(197deg) brightness(97%) contrast(101%) !important; /* голубой #0a6ed1 */
}

/* Разделитель */
.kb-divider {
    width: 100%;
    height: 1px;
    margin: 19px 0 18px;
    background: var(--kb-border);
}

/* =========================================================
   СПИСОК МАТЕРИАЛОВ (с картинками, без иконок)
   ========================================================= */
.kb-list {
    display: flex;
    flex-direction: column;
    gap: 5px;
    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: 58px minmax(0, 1fr);
    gap: 11px;
    width: 100%;
    padding: 9px;
    border: 1px solid transparent;
    border-radius: 11px;
    background: transparent;
    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: #edf0f4;
}

.kb-list-item.active .kb-list-link {
    background: var(--kb-primary-light);
    border-color: #d7e8ff;
}

.kb-list-image {
    width: 58px;
    height: 58px;
    border-radius: 9px;
    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: 1px 0;
}

.kb-list-type {
    margin: 0 0 3px;
    font-size: 9px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: 0.07em;
    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: 12px;
    font-weight: 700;
    line-height: 1.32;
    letter-spacing: -0.01em;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.kb-list-date {
    margin-top: 6px;
    font-size: 10px;
    line-height: 1.2;
    color: #98a2b3;
}

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

/* =========================================================
   ИНТРО-КАРТОЧКА (только для страницы-хаба)
   ========================================================= */
.knowledge-page .kb-main {
    min-width: 0;
}

.knowledge-page .kb-intro-card {
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
    min-height: 520px;
    width: 100%;
    padding: 58px 62px;
    background: var(--kb-card);
    border: 1px solid var(--kb-border);
    border-radius: var(--kb-radius-lg);
    box-shadow: var(--kb-shadow);
    overflow: hidden;
}

.knowledge-page .kb-intro-card::after {
    content: "";
    position: absolute;
    right: -100px;
    bottom: -130px;
    width: 330px;
    height: 330px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(10, 110, 209, 0.055) 0%, rgba(10, 110, 209, 0) 70%);
    pointer-events: none;
}

.knowledge-page .kb-label {
    display: inline-flex;
    align-items: center;
    align-self: flex-start;
    height: 29px;
    padding: 0 11px;
    border: 1px solid var(--kb-primary-border);
    border-radius: var(--kb-radius-sm);
    background: var(--kb-primary-light);
    color: var(--kb-primary);
    font-size: 10px;
    font-weight: 800;
    line-height: 29px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.knowledge-page .kb-intro h1 {
    position: relative;
    z-index: 1;
    max-width: 850px;
    margin: 22px 0 18px;
    color: var(--kb-text);
    font-size: 43px;
    font-weight: 800;
    line-height: 1.13;
    letter-spacing: -0.038em;
}

.knowledge-page .kb-intro p {
    position: relative;
    z-index: 1;
    max-width: 760px;
    margin: 0;
    color: var(--kb-muted);
    font-size: 16px;
    font-weight: 400;
    line-height: 1.7;
}

.knowledge-page .kb-stats {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
    max-width: 780px;
    margin-top: 42px;
}

.knowledge-page .kb-stats div {
    min-width: 0;
    padding: 19px 20px;
    border: 1px solid var(--kb-border-light);
    border-radius: 13px;
    background: #f8fafc;
}

.knowledge-page .kb-stats strong {
    display: block;
    margin: 0;
    color: var(--kb-primary);
    font-size: 25px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.025em;
}

.knowledge-page .kb-stats span {
    display: block;
    margin-top: 6px;
    color: var(--kb-muted);
    font-size: 11px;
    line-height: 1.4;
}

/* =========================================================
   МОДАЛКА ИЗОБРАЖЕНИЙ
   ========================================================= */
.kb-image-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 30px;
    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, 0.82);
    backdrop-filter: blur(4px);
}

.kb-image-dialog {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    max-width: min(1200px, 94vw);
    max-height: 90vh;
}

.kb-image-dialog img {
    display: block;
    max-width: 100%;
    max-height: 88vh;
    width: auto;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 25px 80px rgba(0, 0, 0, 0.3);
    object-fit: contain;
}

.kb-image-close {
    position: absolute;
    top: -18px;
    right: -18px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    background: #fff;
    color: #101828;
    font-family: Arial, sans-serif;
    font-size: 25px;
    font-weight: 400;
    line-height: 1;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
    z-index: 3;
}

.kb-image-close:hover {
    background: #f2f4f7;
}

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

/* =========================================================
   АДАПТИВ
   ========================================================= */
@media (max-width: 1200px) {
    .kb-container {
        padding-left: 20px;
        padding-right: 20px;
    }

    .kb-layout {
        grid-template-columns: 280px minmax(0, 1fr);
        gap: 22px;
    }

    .kb-sidebar {
        padding: 18px 15px;
    }

    .knowledge-page .kb-intro-card {
        padding: 48px;
    }

    .knowledge-page .kb-intro h1 {
        font-size: 39px;
    }
}

@media (max-width: 1000px) {
    .kb-layout {
        grid-template-columns: 250px minmax(0, 1fr);
        gap: 20px;
    }

    .kb-sidebar {
        top: 20px;
    }

    .knowledge-page .kb-intro-card {
        padding: 40px;
        min-height: 480px;
    }

    .knowledge-page .kb-intro h1 {
        font-size: 35px;
    }

    .knowledge-page .kb-stats {
        grid-template-columns: 1fr;
        max-width: 360px;
    }
}

@media (max-width: 980px) {
    .kb-layout {
        display: block;
    }

    .kb-sidebar {
        position: relative;
        top: auto;
        margin-bottom: 20px;
    }

    .kb-categories {
        display: grid;
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: 4px;
    }

    .kb-divider,
    .kb-category-title {
        display: none;
    }

    .kb-list {
        display: none;
    }
}

@media (max-width: 760px) {
    .kb-container {
        padding-left: 16px;
        padding-right: 16px;
    }

    .kb-categories {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .knowledge-page .kb-intro-card {
        padding: 32px 24px;
        min-height: auto;
        border-radius: var(--kb-radius);
    }

    .knowledge-page .kb-intro h1 {
        font-size: 30px;
    }

    .knowledge-page .kb-stats {
        grid-template-columns: 1fr;
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .kb-categories {
        display: block;
    }

    .kb-categories li {
        margin-bottom: 3px;
    }

    .knowledge-page .kb-intro-card {
        padding: 26px 20px;
    }

    .knowledge-page .kb-intro h1 {
        font-size: 26px;
    }

    .knowledge-page .kb-intro p {
        font-size: 14px;
    }

    .knowledge-page .kb-stats strong {
        font-size: 22px;
    }
}