:root {
            --background: #f5f3ee;
            --surface: #ffffff;
            --surface-muted: #ece8df;
            --text: #25231f;
            --text-muted: #676259;
            --border: #d7d1c5;
            --accent: #7a241f;
            --accent-dark: #571713;
            --link: #185b83;
            --header-height: 64px;
            --sidebar-width: 240px;
            --content-width: 900px;
        }

        * {
            box-sizing: border-box;
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            background: var(--background);
            color: var(--text);
            font-family: Georgia, "Times New Roman", serif;
            line-height: 1.65;
        }

        a {
            color: var(--link);
            text-decoration: none;
        }

        a:hover,
        a:focus {
            text-decoration: underline;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            min-height: var(--header-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            padding: 12px 24px;
            background: var(--accent-dark);
            color: #ffffff;
            border-bottom: 3px solid var(--accent);
        }

        .site-header a {
            color: #ffffff;
        }

        .site-title {
            margin: 0;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 1.35rem;
            letter-spacing: 0.03em;
        }

        .header-links {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 0.95rem;
        }

        .site-search {
            position: relative;
            flex: 1;
            max-width: 420px;
            font-family: Arial, Helvetica, sans-serif;
        }

        .site-search-row {
            display: flex;
        }

        .site-search input {
            width: 100%;
            min-width: 0;
            padding: 9px 12px;
            border: 1px solid rgba(255, 255, 255, 0.45);
            border-radius: 5px 0 0 5px;
            background: #ffffff;
            color: var(--text);
            font: inherit;
        }

        .site-search button {
            padding: 9px 13px;
            border: 1px solid rgba(255, 255, 255, 0.45);
            border-left: 0;
            border-radius: 0 5px 5px 0;
            background: var(--accent);
            color: #ffffff;
            cursor: pointer;
            font-weight: 700;
        }

        .search-results {
            position: absolute;
            top: calc(100% + 8px);
            right: 0;
            left: 0;
            z-index: 200;
            max-height: min(65vh, 560px);
            overflow-y: auto;
            background: var(--surface);
            color: var(--text);
            border: 1px solid var(--border);
            border-radius: 8px;
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.2);
        }

        .search-results[hidden] {
            display: none;
        }

        .search-results-list {
            margin: 0;
            padding: 6px;
            list-style: none;
        }

        .search-results-list a {
            display: grid;
            grid-template-columns: minmax(0, 1fr) auto;
            gap: 2px 12px;
            padding: 10px;
            color: var(--text);
            border-radius: 5px;
        }

        .search-results-list a:hover,
        .search-results-list a:focus {
            background: var(--surface-muted);
            text-decoration: none;
            outline: none;
        }

        .search-result-section {
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }

        .search-result-snippet {
            grid-column: 1 / -1;
            color: var(--text-muted);
            font-family: Georgia, "Times New Roman", serif;
            font-size: 0.86rem;
        }

        .search-empty {
            margin: 0;
            padding: 16px;
        }

        .layout {
            display: grid;
            grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
            min-height: calc(100vh - var(--header-height));
        }

        .sidebar {
            padding: 24px 18px;
            background: var(--surface-muted);
            border-right: 1px solid var(--border);
        }

        .sidebar-title {
            margin: 0 0 14px;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 0.8rem;
            letter-spacing: 0.12em;
            text-transform: uppercase;
            color: var(--text-muted);
        }

        .sidebar-nav {
            display: grid;
            gap: 4px;
        }

        .sidebar-nav a {
            display: block;
            padding: 7px 10px;
            color: var(--text);
            border-radius: 5px;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 0.94rem;
        }

        .sidebar-nav a:hover,
        .sidebar-nav a:focus {
            background: var(--surface);
            color: var(--accent);
            text-decoration: none;
        }

        .content-column {
            width: 100%;
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 28px 36px 48px;
        }

        .breadcrumbs {
            margin-bottom: 16px;
            color: var(--text-muted);
            font-family: Arial, Helvetica, sans-serif;
            font-size: 0.88rem;
        }

        .article-card {
            padding: 34px 40px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            box-shadow: 0 3px 12px rgba(0, 0, 0, 0.06);
        }

        main h1,
        main h2,
        main h3,
        main h4 {
            line-height: 1.25;
            color: var(--accent-dark);
        }

        main h1 {
            margin-top: 0;
            padding-bottom: 12px;
            border-bottom: 2px solid var(--border);
            font-size: 2.15rem;
        }

        main h2 {
            margin-top: 2rem;
            font-size: 1.55rem;
        }

        main h3 {
            margin-top: 1.6rem;
            font-size: 1.2rem;
        }

        main p {
            margin: 0 0 1rem;
        }

        main ul,
        main ol {
            padding-left: 1.5rem;
        }

        main table {
            width: 100%;
            margin: 1.5rem 0;
            border-collapse: collapse;
            background: #ffffff;
            font-family: Arial, Helvetica, sans-serif;
            font-size: 0.92rem;
        }

        main th,
        main td {
            padding: 9px 11px;
            border: 1px solid var(--border);
            text-align: left;
            vertical-align: top;
        }

        main th {
            background: var(--surface-muted);
            color: var(--accent-dark);
        }

        main tr:nth-child(even) td {
            background: #faf9f6;
        }

        blockquote {
            margin: 1.5rem 0;
            padding: 12px 18px;
            background: #f3efe7;
            border-left: 4px solid var(--accent);
        }

        .page-navigation {
            display: grid;
            grid-template-columns: repeat(2, minmax(0, 1fr));
            gap: 16px;
            margin-top: 24px;
        }

        .page-navigation:empty {
            display: none;
        }

        .page-navigation-link {
            display: flex;
            flex-direction: column;
            gap: 3px;
            padding: 14px 16px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 8px;
            font-family: Arial, Helvetica, sans-serif;
        }

        .page-navigation-link:hover,
        .page-navigation-link:focus {
            border-color: var(--accent);
            text-decoration: none;
        }

        .page-navigation-link.next {
            align-items: flex-end;
            text-align: right;
        }

        .page-navigation-direction {
            color: var(--text-muted);
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .site-footer {
            margin-top: 28px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
            color: var(--text-muted);
            font-family: Arial, Helvetica, sans-serif;
            font-size: 0.85rem;
        }

        @media (max-width: 850px) {
            .site-header {
                position: static;
                align-items: flex-start;
                flex-direction: column;
            }

            .site-search {
                width: 100%;
                max-width: none;
            }

            .layout {
                display: block;
            }

            .sidebar {
                border-right: 0;
                border-bottom: 1px solid var(--border);
            }

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

            .content-column {
                padding: 22px 16px 36px;
            }

            .article-card {
                padding: 24px 20px;
            }

            .page-navigation {
                grid-template-columns: 1fr;
            }

            .page-navigation-spacer {
                display: none;
            }
        }

        @media (max-width: 520px) {
            .header-links {
                gap: 12px;
            }

            .sidebar-nav {
                grid-template-columns: 1fr;
            }

            main h1 {
                font-size: 1.75rem;
            }

            main table {
                display: block;
                overflow-x: auto;
            }
        }