*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
    background-color: #f7f7fa;
    color: #111827;
}

a {
    color: #2563eb;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    background: #111827;
    color: #f9fafb;
}

.logo-title h1 {
    margin: 0;
    font-size: 1.4rem;
}

.subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.9rem;
    opacity: 0.85;
}

.lang-switcher button,
.lang-switcher a {
    margin-left: 0.5rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    border: 1px solid #4b5563;
    background: transparent;
    color: #f9fafb;
    cursor: pointer;
    font-size: 0.85rem;
    text-decoration: none;
}

.lang-switcher button.active {
    background: #f9fafb;
    color: #111827;
}

.layout {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

/* TOC / меню */

.toc {
    background: #fff;
    border-radius: 0.75rem;
    padding: 1rem;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
    font-size: 0.95rem;
}

.toc h2 {
    margin-top: 1rem;
    margin-bottom: 0.25rem;
    font-size: 1.05rem;
}

.toc h3 {
    margin: 0.4rem 0 0.25rem;
    font-size: 0.9rem;
    color: #4b5563;
}

.toc ul {
    list-style: disc;
    padding-left: 1.25rem;
    margin: 0 0 0.3rem;
}

.toc li {
    margin: 0.15rem 0;
}

.toc-section {
    margin-bottom: 0.75rem;
    border-top: 1px solid #e5e7eb;
    padding-top: 0.75rem;
	background-color: #fcfcfc;
    border-radius: 18px;
}

.toc-active {
    font-weight: 700;
}

.toc-active-item {
    background-color: rgba(17, 24, 39, 0.06);
    border-radius: 10px;
}

.toc-section:first-of-type {
    border-top: none;
    padding-top: 0;
}

.toc-search {
    margin-bottom: 0.75rem;
}

.toc-search label {
    display: block;
    font-size: 0.8rem;
    color: #6b7280;
    margin-bottom: 0.25rem;
}

.toc-search input {
    width: 100%;
    padding: 0.3rem 0.5rem;
    border-radius: 0.5rem;
    border: 1px solid #d1d5db;
    font-size: 0.9rem;
}

/* Главный блок */

.welcome {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.welcome-text p {
    text-align: justify;
    margin: 0 0 0.75rem;
}

.welcome-image img {
    max-width: 100%;
    display: block;
    border-radius: 0.75rem;
    box-shadow: 0 2px 8px rgba(15, 23, 42, 0.12);
}

/* Статья */

.article-layout {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 1rem;
}

/* Порядок блоков в статье:
   по умолчанию (мобайл) сначала статья, потом оглавление под ней.
*/
.article-layout .article-main {
    order: 1;
}

.article-layout .toc {
    order: 2;
}


.article-main {
    background: #fff;
    border-radius: 0.75rem;
    padding: 1.25rem;
    box-shadow: 0 1px 4px rgba(15, 23, 42, 0.08);
}

.article-header h1 {
    margin-top: 0;
    margin-bottom: 0.3rem;
}

.article-dates {
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.article-annotation {
    font-style: italic;
    margin-bottom: 1rem;
}

.article-body p {
    text-align: justify;
    margin: 0 0 0.75rem;
}

.article-body ul {
    list-style: disc;
    padding-left: 1.25rem;
    margin: 0 0 0.75rem;
}

.article-summary {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-left: 4px solid #2563eb;
    background: #eff6ff;
    border-radius: 0.5rem;
    text-align: justify;
}

.article-tags {
    margin-top: 0.75rem;
    font-size: 0.9rem;
}

.article-tags span {
    font-weight: 600;
}

.article-tags a {
    display: inline-block;
    margin-right: 0.4rem;
    margin-top: 0.25rem;
    padding: 0.15rem 0.5rem;
    border-radius: 999px;
    background: #e5e7eb;
    text-decoration: none;
    font-size: 0.85rem;
    color: #111827;
}

.site-footer {
    padding: 0.75rem 1.5rem 1.5rem;
    font-size: 0.85rem;
    color: #6b7280;
    text-align: center;
}

/* Desktop layout */

@media (min-width: 900px) {
    .layout {
        flex-direction: row;
        align-items: flex-start;
    }

    .toc {
        flex: 0 0 280px;
        max-height: calc(100vh - 120px);
        overflow-y: auto;
        position: sticky;
        top: 1rem;
    }

    .welcome {
        flex: 1;
    }

    .article-layout {
        flex-direction: row;
        align-items: flex-start;
    }
    .article-layout .toc {
        order: 1;
    }

    .article-layout .article-main {
        order: 2;
    }


    .article-layout .toc {
        flex: 0 0 280px;
    }

    .article-layout .article-main {
        flex: 1;
    }
}

/* Система языков */

[data-lang] {
    display: none;
}

html.lang-ru [data-lang="ru"],
html.lang-ro [data-lang="ro"] {
    display: initial;
}


/* Дополнительные стили для оглавления */

.toc-section {
    margin-bottom: 0.85rem;
    padding: 0.75rem 0.75rem 0.6rem;
    border-radius: 0.75rem;
    background: #ffffff;
    border: 1px solid #e5e7eb;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.toc-section + .toc-section {
    margin-top: 0.5rem;
}

.toc-section h2 {
    margin-top: 0;
    margin-bottom: 0.35rem;
    font-size: 1rem;
    font-weight: 700;
}

.toc-section h3 {
    margin: 0.35rem 0 0.2rem;
    font-size: 0.85rem;
    font-weight: 600;
    color: #4b5563;
}

.toc ul {
    margin: 0 0 0.2rem;
}

.toc-sublist {
    list-style: circle;
    padding-left: 1.1rem;
    margin-top: 0.1rem;
}

.toc-sublist li {
    margin: 0.1rem 0;
}

/* Заголовки с data-lang должны быть блочными, чтобы "Мир" не прилипал к эпохе */

html.lang-ru h2[data-lang="ru"],
html.lang-ru h3[data-lang="ru"],
html.lang-ro h2[data-lang="ro"],
html.lang-ro h3[data-lang="ro"] {
    display: block;
}