* { margin: 0; padding: 0; box-sizing: border-box; }

        :root {
            --teal: #4CB5AE;
            --teal-dark: #2F8C86;
            --navy: #182838;
            --navy-soft: #2B4055;
            --text-dark: #253746;
            --text-gray: #5C6E7E;
            --text-light: #8392A2;
            --white: #FFFFFF;
            --border: #DEE7ED;
            --surface: rgba(255,255,255,0.84);
            --shadow: 0 28px 64px rgba(24, 40, 56, 0.12);
        }

        html { scroll-behavior: smooth; }

        body {
            font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            background:
                radial-gradient(circle at top left, rgba(76, 181, 174, 0.16), transparent 28%),
                radial-gradient(circle at top right, rgba(242, 160, 154, 0.18), transparent 24%),
                linear-gradient(180deg, #F7FCFB 0%, #FFFFFF 22%, #FFF8F5 100%);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        h1, h2, h3 {
            font-family: 'DM Serif Display', Georgia, serif;
            font-weight: 400;
        }

        .docs-shell {
            max-width: 1280px;
            margin: 0 auto;
            padding: 96px 24px 32px;
        }

        .docs-header {
            display: flex;
            align-items: end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 22px;
        }

        .docs-header h1 {
            font-size: clamp(2.2rem, 4vw, 3rem);
            line-height: 1.05;
            color: var(--navy);
            margin-bottom: 6px;
        }

        .docs-header p {
            color: var(--text-gray);
            font-size: 1rem;
            max-width: 56ch;
        }

        .header-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 18px;
            border-radius: 999px;
            background: rgba(76, 181, 174, 0.14);
            color: var(--teal-dark);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.9rem;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .header-cta:hover {
            background: rgba(76, 181, 174, 0.22);
        }

        .featured {
            display: grid;
            margin-bottom: 22px;
            padding: 28px 32px;
            border-radius: 30px;
            text-decoration: none;
            color: inherit;
            background:
                radial-gradient(circle at top right, rgba(242, 160, 154, 0.22), transparent 40%),
                linear-gradient(135deg, rgba(76, 181, 174, 0.18) 0%, rgba(255, 255, 255, 0.86) 60%);
            border: 1px solid rgba(255,255,255,0.78);
            box-shadow: 0 28px 64px rgba(24, 40, 56, 0.12);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            grid-template-columns: minmax(0, 1.4fr) minmax(220px, 1fr);
            gap: 24px;
            align-items: center;
        }

        .featured:hover {
            box-shadow: 0 32px 72px rgba(24, 40, 56, 0.18);
        }

        .featured-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
            padding: 6px 12px;
            border-radius: 999px;
            background: rgba(23, 38, 52, 0.92);
            color: var(--white);
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
        }

        .featured-tag::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 999px;
            background: var(--teal);
        }

        .featured h2 {
            font-family: 'DM Serif Display', Georgia, serif;
            font-size: clamp(1.6rem, 2.6vw, 2.2rem);
            line-height: 1.1;
            color: var(--navy);
            margin-bottom: 8px;
        }

        .featured p {
            color: var(--text-gray);
            font-size: 0.96rem;
            max-width: 56ch;
        }

        .featured-actions {
            margin-top: 16px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 10px 16px;
        }

        .featured-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--teal-dark);
            font-weight: 700;
            font-size: 0.9rem;
            text-decoration: none;
        }

        .featured-cta-primary {
            padding: 10px 15px;
            border-radius: 999px;
            background: var(--navy);
            color: var(--white);
        }

        .featured-cta-primary:hover {
            background: var(--navy-soft);
        }

        .featured-cta-secondary:hover {
            color: var(--navy);
        }

        .featured-meta {
            display: grid;
            gap: 8px;
        }

        .featured-meta-row {
            display: flex;
            align-items: baseline;
            gap: 10px;
            padding: 12px 16px;
            background: rgba(255,255,255,0.7);
            border-radius: 16px;
            border: 1px solid var(--border);
            color: inherit;
            text-decoration: none;
            transition: border-color 0.18s ease, background 0.18s ease;
        }

        .featured-meta-row:hover {
            background: rgba(255,255,255,0.96);
            border-color: rgba(76, 181, 174, 0.32);
        }

        .featured-meta-row strong {
            font-family: 'DM Serif Display', serif;
            font-size: 1.4rem;
            color: var(--navy);
            line-height: 1;
            min-width: 92px;
            white-space: nowrap;
        }

        .featured-meta-row span {
            font-size: 0.86rem;
            color: var(--text-gray);
        }

        .guides-heading {
            font-family: 'DM Sans', sans-serif;
            font-weight: 700;
            font-size: 0.78rem;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            color: var(--text-light);
            margin-bottom: 12px;
        }

        .manual-index {
            margin: 28px 0 34px;
            padding: 26px;
            border-radius: 28px;
            border: 1px solid rgba(255,255,255,0.78);
            background: rgba(255,255,255,0.84);
            box-shadow: var(--shadow);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }

        .manual-index-header {
            display: flex;
            align-items: start;
            justify-content: space-between;
            gap: 22px;
            margin-bottom: 18px;
        }

        .manual-index-header h2 {
            font-size: clamp(1.45rem, 2.2vw, 1.9rem);
            line-height: 1.12;
            color: var(--navy);
            margin-bottom: 6px;
        }

        .manual-index-header p {
            color: var(--text-gray);
            font-size: 0.93rem;
            max-width: 68ch;
        }

        .manual-index-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 14px;
            border-radius: 999px;
            border: 1px solid var(--border);
            background: rgba(255,255,255,0.72);
            color: var(--navy-soft);
            text-decoration: none;
            font-weight: 700;
            font-size: 0.86rem;
            white-space: nowrap;
        }

        .manual-index-link:hover {
            border-color: rgba(76, 181, 174, 0.42);
            background: var(--white);
        }

        .manual-tools {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .manual-search {
            position: relative;
            flex: 1;
            min-width: 0;
        }

        .manual-search::before {
            content: '';
            position: absolute;
            left: 14px;
            top: 50%;
            transform: translateY(-50%);
            width: 14px;
            height: 14px;
            border-radius: 999px;
            border: 1.8px solid var(--text-light);
            box-shadow: 5px 5px 0 -3.8px var(--text-light);
        }

        .manual-search input {
            width: 100%;
            min-height: 46px;
            padding: 12px 14px 12px 40px;
            border: 1px solid var(--border);
            border-radius: 14px;
            background: rgba(255,255,255,0.74);
            color: var(--text-dark);
            font: inherit;
            font-size: 0.92rem;
            transition: border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
        }

        .manual-search input:focus {
            outline: none;
            border-color: var(--teal);
            background: var(--white);
            box-shadow: 0 0 0 4px rgba(76, 181, 174, 0.12);
        }

        .manual-section-count {
            flex-shrink: 0;
            padding: 10px 12px;
            border-radius: 12px;
            background: rgba(23, 38, 52, 0.06);
            color: var(--text-gray);
            font-size: 0.78rem;
            font-weight: 700;
            white-space: nowrap;
        }

        .manual-topic-pills {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }

        .manual-topic-pill {
            display: inline-flex;
            align-items: center;
            min-height: 34px;
            padding: 7px 11px;
            border-radius: 999px;
            background: rgba(76, 181, 174, 0.12);
            color: var(--teal-dark);
            text-decoration: none;
            font-size: 0.78rem;
            font-weight: 700;
            line-height: 1.2;
        }

        .manual-topic-pill:hover {
            background: rgba(76, 181, 174, 0.22);
            color: var(--navy);
        }

        .manual-section-list {
            display: grid;
            gap: 18px;
        }

        .manual-part {
            padding-top: 18px;
            border-top: 1px solid var(--border);
            scroll-margin-top: 88px;
        }

        .manual-part:first-child {
            padding-top: 0;
            border-top: 0;
        }

        .manual-part-header {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            gap: 14px;
            margin-bottom: 10px;
        }

        .manual-part-header h3 {
            font-family: 'DM Sans', sans-serif;
            font-size: 0.96rem;
            font-weight: 700;
            color: var(--navy);
            line-height: 1.25;
        }

        .manual-part-header span {
            color: var(--text-light);
            font-size: 0.74rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .manual-section-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 8px;
        }

        .manual-section-link {
            display: grid;
            grid-template-columns: 42px minmax(0, 1fr);
            gap: 10px;
            min-height: 78px;
            padding: 11px 12px;
            border-radius: 14px;
            border: 1px solid rgba(222, 231, 237, 0.92);
            background: rgba(255,255,255,0.66);
            color: inherit;
            text-decoration: none;
            transition: transform 0.16s ease, border-color 0.16s ease, background 0.16s ease, box-shadow 0.16s ease;
        }

        .manual-section-link:hover {
            transform: translateY(-1px);
            border-color: rgba(76, 181, 174, 0.38);
            background: var(--white);
            box-shadow: 0 10px 22px rgba(24, 40, 56, 0.07);
        }

        .manual-section-num {
            color: var(--teal-dark);
            font-size: 0.78rem;
            font-weight: 800;
            font-variant-numeric: tabular-nums;
        }

        .manual-section-title {
            display: block;
            color: var(--navy);
            font-size: 0.88rem;
            font-weight: 700;
            line-height: 1.25;
        }

        .manual-section-label {
            display: block;
            margin-top: 3px;
            color: var(--text-gray);
            font-size: 0.76rem;
            line-height: 1.28;
        }

        .manual-section-page {
            display: block;
            margin-top: 5px;
            color: var(--text-light);
            font-size: 0.68rem;
            font-weight: 800;
            letter-spacing: 0.06em;
            text-transform: uppercase;
        }

        .manual-loading,
        .manual-empty {
            padding: 16px 18px;
            border-radius: 16px;
            background: rgba(23, 38, 52, 0.05);
            color: var(--text-gray);
            font-size: 0.9rem;
        }

        .manual-empty {
            display: none;
            margin-top: 14px;
        }

        .manual-empty.is-visible {
            display: block;
        }

        .guides {
            display: grid;
            grid-template-columns: repeat(5, minmax(0, 1fr));
            gap: 14px;
        }

        .guide-card {
            display: flex;
            flex-direction: column;
            padding: 18px;
            border-radius: 22px;
            text-decoration: none;
            color: inherit;
            transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease, box-shadow 0.18s ease;
            border: 1px solid var(--border);
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            min-height: 168px;
        }

        .guide-card:hover {
            transform: translateY(-2px);
            border-color: rgba(76, 181, 174, 0.32);
            background: rgba(255,255,255,0.96);
            box-shadow: 0 16px 32px rgba(24, 40, 56, 0.08);
        }

        .guide-tag {
            display: inline-flex;
            align-items: center;
            width: fit-content;
            margin-bottom: 10px;
            padding: 5px 10px;
            border-radius: 999px;
            font-size: 0.68rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--teal-dark);
            background: rgba(76, 181, 174, 0.12);
        }

        .guide-card h3 {
            font-size: 1.2rem;
            color: var(--navy);
            line-height: 1.15;
            margin-bottom: 6px;
        }

        .guide-card p {
            color: var(--text-gray);
            font-size: 0.86rem;
            line-height: 1.45;
        }

        .guide-footer {
            margin-top: auto;
            padding-top: 10px;
            color: var(--navy-soft);
            font-size: 0.82rem;
            font-weight: 700;
        }

        @media (max-width: 1180px) {
            .guides {
                grid-template-columns: repeat(4, minmax(0, 1fr));
            }
        }

        @media (max-width: 900px) {
            .guides {
                grid-template-columns: repeat(3, minmax(0, 1fr));
            }
        }

        @media (max-width: 820px) {
            .featured {
                grid-template-columns: 1fr;
            }

            .manual-index-header {
                display: block;
            }

            .manual-index-link {
                margin-top: 12px;
            }
        }

        @media (max-width: 680px) {
            .docs-shell {
                padding: 96px 16px 48px;
            }

            .docs-header {
                display: block;
            }

            .header-cta {
                margin-top: 14px;
            }

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

            .featured {
                padding: 22px;
            }

            .manual-index {
                padding: 20px;
            }

            .manual-tools {
                display: block;
            }

            .manual-section-count {
                display: inline-flex;
                margin-top: 10px;
            }

            .manual-section-grid {
                grid-template-columns: 1fr;
            }

            .manual-part-header {
                display: block;
            }

            .manual-part-header span {
                display: inline-block;
                margin-top: 4px;
            }
        }

        @media (max-width: 420px) {
            .guides {
                grid-template-columns: 1fr;
            }
        }