:root {
    --materials-blue-light: #0078be;
    --materials-blue-medium: #005f9c;
    --materials-blue-dark: #00467f;

    --materials-title: #3D464D;



    --materials-text: #3d464d;
    --materials-text-muted: #68737c;

    --materials-border: #e1e5e8;
    --materials-background-muted: #f5f7f8;
}



/* Главная страница материалов */

.materials-index {
    padding: 0 0 48px;
}

/* Фильтры материалов */

.materials-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;

    margin-bottom: 22px;
}

.materials-filter {
    flex: 0 0 auto;

    padding: 8px 13px;

    background: #ffffff;
    border: 1px solid #d9dee2;
    border-radius: 20px;

    color: #59636b;

    font-family: inherit;
    font-size: 13px;
    line-height: 1.2;
    font-weight: 500;
    white-space: nowrap;

    cursor: pointer;
}

.materials-filter:hover {
    border-color: #aeb7bd;
}

.materials-filter:focus-visible {
    outline: 2px solid var(--materials-blue-light);
    outline-offset: 2px;
}

.materials-filter.is-active {
    background: var(--materials-blue-medium);
    border-color: var(--materials-blue-medium);

    color: #ffffff;
}

/* Сетка материалов */

.materials-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
}


/* Карточка материала */

.materials-card {
    display: flex;
    min-width: 0;
    flex-direction: column;

    background: #ffffff;
    border: 1px solid var(--materials-border);
    border-radius: 6px;
    overflow: hidden;

    color: var(--materials-text);
    text-decoration: none;
}

.materials-card--link:hover,
.materials-card--link:focus {
    color: var(--materials-text);
    text-decoration: none;
}

.materials-card--soon {
    cursor: default;
}


/* Изображение карточки */

.materials-card__image-wrap {
    position: relative;

    aspect-ratio: 16 / 9;
    overflow: hidden;

    background: var(--materials-background-muted);
    border-bottom: 1px solid var(--materials-border);
}

.materials-card__image {
    display: block;

    width: 100%;
    height: 100%;

    object-fit: cover;
}

.materials-card__badge {
    position: absolute;
    top: 12px;
    right: 12px;

    max-width: calc(100% - 24px);
    padding: 6px 9px;

    background: var(--materials-blue-medium);
    border-radius: 3px;

    color: #ffffff;

    font-size: 11px;
    line-height: 1.25;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.materials-card__badge {
    max-width: calc(100% - 24px);
}


/* Содержимое карточки */

.materials-card__content {
    display: flex;
    flex: 1;
    flex-direction: column;

    padding: 20px;
}

.materials-card__title {
    margin-bottom: 10px;

    color: var(--materials-title);

    font-size: 19px;
    line-height: 1.35;
}

.materials-card__description {
    margin-bottom: 20px;

    color: var(--materials-text-muted);

    font-size: 14px;
    line-height: 1.55;
}

.materials-card__footer {
    display: flex;
    align-items: center;
    gap: 8px;

    margin-top: auto;

    color: var(--materials-blue-light);

    font-size: 13px;
    font-weight: 700;
}

.materials-card__footer i {
    font-size: 11px;
}

.materials-card__footer--soon {
    color: #929ba2;
    font-weight: 500;
}


/* Пустой раздел */

.materials-empty {
    padding: 30px;

    background: #ffffff;
    border: 1px solid var(--materials-border);
    border-radius: 6px;

    color: var(--materials-text-muted);

    font-size: 15px;
    text-align: center;
}


/* Страница отдельного материала */

.materials-page {
    padding: 0 0 48px;
}

.materials-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 28px;
    align-items: start;
}


/* Карточка статьи */

.materials-article {
    min-width: 0;

    background: #ffffff;
    border: 1px solid var(--materials-border);
    border-radius: 6px;
    overflow: hidden;
}


/* Заголовок статьи */

.materials-article__header {
    padding: 36px 40px 30px;

    background: #ffffff;
    border-bottom: 1px solid var(--materials-border);
}
.materials-article__topline {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 20px;

    margin-bottom: 18px;
}

.materials-article__category {
    display: inline-flex;
    flex: 0 0 auto;

    padding: 6px 11px;

    background: var(--materials-blue-medium);
    border-radius: 3px;

    color: #ffffff;

    font-size: 12px;
    line-height: 1;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.materials-article__title {
    max-width: 850px;

    margin: 0 0 18px;

    color: var(--materials-title);

    font-size: 36px;
    line-height: 1.2;
    font-weight: 700;
}

.materials-article__lead {
    max-width: 850px;

    margin: 0;

    color: var(--materials-text-muted);

    font-size: 18px;
    line-height: 1.65;
}

.materials-article__meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 8px 18px;

    color: #87919a;

    font-size: 13px;
    line-height: 1.4;
}

.materials-article__meta span {
    display: inline-flex;
    align-items: center;
    gap: 7px;
}


/* Содержимое статьи */

.materials-content {
    padding: 34px 40px 42px;

    color: #4e5962;

    font-size: 16px;
    line-height: 1.75;
}

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

.materials-content > *:last-child {
    margin-bottom: 0;
}

.materials-content h2,
.materials-content h3 {
    color: var(--materials-title);
    scroll-margin-top: 120px;
}

.materials-content h2 {
    margin: 38px 0 16px;

    font-size: 25px;
    line-height: 1.3;
}

.materials-content h3 {
    margin: 28px 0 12px;

    font-size: 19px;
    line-height: 1.4;
}

.materials-content p {
    margin-bottom: 18px;
}

.materials-content ul,
.materials-content ol {
    margin-bottom: 20px;
    padding-left: 22px;
}

.materials-content li {
    margin-bottom: 8px;
}

.materials-content a {
    color: var(--materials-blue-medium);

    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.materials-content a:hover {
    color: var(--materials-blue-dark);
}


/* Информационный блок */

.materials-note {
    margin: 24px 0;
    padding: 18px 20px;

    background: #edf7fc;
    border-left: 4px solid var(--materials-blue-light);

    color: #505960;
}


/* Нижний блок статьи */

.materials-article__footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;

    padding: 26px 40px;

    background: var(--materials-background-muted);
    border-top: 1px solid var(--materials-border);
}

.materials-article__footer strong {
    display: block;

    margin-bottom: 5px;

    color: var(--materials-blue-dark);
    font-size: 17px;
}

.materials-article__footer p {
    margin: 0;

    color: #737e87;
    font-size: 14px;
}

/* Широкие таблицы внутри статей */

.materials-table--wide {
    min-width: 980px;
}

/* Боковая колонка статьи */

.materials-sidebar {
    position: sticky;
    top: 110px;

    min-width: 0;
    align-self: start;

    max-height: calc(100vh - 130px);
    overflow-y: auto;
}

.materials-sidebar__sticky {
    position: static;
}

.materials-sidebar__card {
    margin-bottom: 18px;
    padding: 22px;

    background: #ffffff;
    border: 1px solid var(--materials-border);
    border-radius: 6px;
}

.materials-sidebar__title {
    margin: 0 0 16px;

    color: var(--materials-title);

    font-size: 16px;
    line-height: 1.3;
    font-weight: 700;
    text-transform: uppercase;
}

.materials-sidebar__empty {
    margin: 0;

    color: #8a949c;

    font-size: 14px;
    line-height: 1.5;
}

.materials-sidebar__all-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;

    color: var(--materials-blue-medium);

    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
}

.materials-sidebar__all-link:hover {
    color: var(--materials-blue-dark);
}

/* Связанные материалы */

.materials-related {
    display: flex;
    flex-direction: column;
}

.materials-related__link {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;

    padding: 12px 0;

    border-top: 1px solid var(--materials-border);

    color: var(--materials-text);

    font-size: 14px;
    line-height: 1.45;
    text-decoration: none;
}

.materials-related__link:first-child {
    padding-top: 0;
    border-top: 0;
}

.materials-related__link:hover {
    color: var(--materials-blue-medium);
    text-decoration: none;
}

.materials-related__link i {
    flex: 0 0 auto;

    margin-top: 3px;

    color: #a0a8ae;
}

.materials-sidebar__all-link {
    margin-top: 10px;
    padding-top: 14px;

    border-top: 1px solid var(--materials-border);
}


/* Оглавление статьи */

.materials-toc {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.materials-toc a {
    color: #68737c;

    font-size: 14px;
    line-height: 1.4;
    text-decoration: none;
}

.materials-toc a:hover {
    color: var(--materials-blue-medium);
}


/* Планшеты */

@media (max-width: 1199px) {
    .materials-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 991px) {
    .materials-layout {
        grid-template-columns: 1fr;
    }

    .materials-sidebar {
        position: static;

        max-height: none;
        overflow: visible;
    }

    .materials-sidebar__sticky {
        position: static;
    }
}


/* Мобильная версия */

@media (max-width: 767px) {
    .materials-index,
    .materials-page {
        padding-bottom: 36px;
    }

    .materials-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .materials-card__content {
        padding: 17px;
    }

    .materials-card__title {
        font-size: 18px;
    }

  .materials-filters {
    flex-wrap: nowrap;

    overflow-x: auto;
    padding-bottom: 4px;

    scrollbar-width: none;
}

.materials-filters::-webkit-scrollbar {
    display: none;
}
}

@media (max-width: 575px) {
    .materials-breadcrumbs {
        margin-bottom: 16px;

        font-size: 13px;
    }

    .materials-article__header {
        padding: 25px 20px 22px;
    }

    .materials-article__title {
        font-size: 27px;
    }

    .materials-article__lead {
        font-size: 16px;
    }

    .materials-content {
        padding: 25px 20px 30px;
    }

    .materials-content h2 {
        font-size: 22px;
    }

    .materials-article__footer {
        flex-direction: column;
        align-items: flex-start;

        padding: 22px 20px;
    }

    .materials-sidebar__card {
        padding: 20px;
    }

    .materials-article__topline {
    flex-direction: column;
    gap: 12px;
    }

    .materials-article__meta {
        justify-content: flex-start;
        gap: 8px 14px;
    }
}

/* Таблицы и источники внутри статей */

.materials-table-wrap {
    width: 100%;

    margin: 24px 0;
    overflow-x: auto;

    border: 1px solid var(--materials-border);
    border-radius: 6px;
}

.materials-table {
    width: 100%;
    min-width: 720px;

    margin: 0;

    background: #ffffff;

    border-collapse: collapse;
}

.materials-table th,
.materials-table td {
    padding: 14px 16px;

    border-bottom: 1px solid var(--materials-border);

    color: var(--materials-text);

    font-size: 14px;
    line-height: 1.45;
    vertical-align: top;
}

.materials-table th {
    background: var(--materials-background-muted);

    color: var(--materials-title);

    font-weight: 700;
    text-align: left;
}

.materials-table tr:last-child td {
    border-bottom: 0;
}


/* Широкая таблица ВГП */

.materials-table--wide {
    min-width: 980px;
}

.materials-table--vgp {
    min-width: 1220px;
}

.materials-table--vgp th,
.materials-table--vgp td {
    text-align: center;
    vertical-align: middle;
}

.materials-table--vgp thead th {
    background: #f3f6f8;
}

.materials-table--vgp .materials-table__main-col {
    background: #eef2f5;
}

.materials-table--vgp .materials-table__series {
    background: #eaf4fb;

    color: var(--materials-title);

    font-size: 13px;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.materials-table--vgp .materials-table__series-start {
    border-left: 2px solid #cfd9df;
}

.materials-table--vgp tbody .materials-table__series-start {
    background: #fbfcfd;
}


/* Источники */

.materials-source-list {
    padding-left: 20px;
}

.materials-source-list li {
    margin-bottom: 8px;
}

/* Изображения внутри статей */

.materials-figure {
    margin: 26px 0 30px;
}

.materials-figure__image {
    display: block;

    width: 100%;
    height: auto;

    border: 1px solid var(--materials-border);
    border-radius: 6px;
}

.materials-figure__caption {
    margin-top: 10px;

    color: var(--materials-text-muted);

    font-size: 13px;
    line-height: 1.5;
}

/* Блоки типов труб в статьях */

.materials-pipe-type {
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 24px;
    align-items: start;

    margin: 24px 0;
}

.materials-pipe-type__figure {
    margin: 0;
}

.materials-pipe-type__image {
    display: block;

    width: 100%;
    height: auto;

    background: var(--materials-background-muted);
    border: 1px solid var(--materials-border);
    border-radius: 6px;
}

.materials-pipe-type__content p:last-child {
    margin-bottom: 0;
}

@media (max-width: 767px) {
    .materials-pipe-type {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .materials-pipe-type__figure {
        max-width: 320px;
    }
}