:root {
    --manual-ink: #102033;
    --manual-muted: #5f6f82;
    --manual-line: #dbe4ee;
    --manual-soft: #f5f8fb;
    --manual-panel: #ffffff;
    --manual-accent: #0b8f69;
    --manual-accent-2: #0d6efd;
    --manual-sidebar: 300px;
}

.manual-shell {
    background: var(--bg-light, #f8fafc);
    min-height: 100vh;
    color: var(--manual-ink);
    font-family: "Noto Sans Thai", Tahoma, sans-serif;
    font-size: 16px;
    line-height: 1.65;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
}

/* ใช้ .container จาก style.css (max-width 1200px, padding 0 1rem) ให้ตรง header/footer */
.manual-top {
    padding: 1.5rem 0 1rem;
    background: #fff;
    border-bottom: 1px solid var(--manual-line);
}

.manual-top + .manual-hero--bleed {
    margin-top: 0;
}

.manual-body {
    padding-top: 1.5rem;
    padding-bottom: 3rem;
}

.manual-body--page {
    padding-top: 1.25rem;
}

.manual-hero {
    color: #fff;
    margin-bottom: 0;
}

.manual-hero--bleed {
    background: linear-gradient(135deg, #0f2d4a 0%, #0b8f69 100%);
    padding: 2.5rem 0;
    margin-bottom: 1.5rem;
    box-shadow: 0 12px 40px rgba(16, 32, 51, 0.12);
}

.manual-hero--bleed .container {
    padding-left: 1rem;
    padding-right: 1rem;
}

.manual-hero h1 {
    font-family: "Noto Sans Thai", Tahoma, sans-serif;
    font-weight: 700;
    font-size: clamp(2rem, 4vw, 3.2rem);
    line-height: 1.08;
    margin: 0 0 0.8rem;
}

.manual-hero p {
    margin: 0;
    color: rgba(255, 255, 255, 0.86);
    max-width: 780px;
    font-size: 1.08rem;
}

.manual-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    align-items: center;
    color: var(--manual-muted);
    font-size: 0.9rem;
    margin: 0;
    padding: 0;
    line-height: 1.5;
}

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

.manual-breadcrumb a:hover {
    text-decoration: underline;
}

/* --- Page layout: left TOC / right content --- */
.manual-toc-toggle {
    display: none;
    width: 100%;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1rem;
    margin-bottom: 0.75rem;
    border: 1px solid var(--manual-line);
    border-radius: 14px;
    background: var(--manual-panel);
    color: var(--manual-ink);
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    box-shadow: 0 4px 14px rgba(16, 32, 51, 0.06);
}

.manual-layout {
    display: grid;
    grid-template-columns: var(--manual-sidebar) minmax(0, 1fr);
    gap: 1.5rem;
    align-items: start;
}

.manual-toc {
    position: sticky;
    top: 1rem;
    background: var(--manual-panel);
    border: 1px solid var(--manual-line);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 12px 32px rgba(16, 32, 51, 0.08);
}

.manual-toc-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem 1.1rem;
    background: linear-gradient(135deg, #0f2d4a 0%, #145a45 100%);
    color: #fff;
}

.manual-toc-label {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    opacity: 0.75;
    margin-bottom: 0.25rem;
}

.manual-toc-head h2 {
    font-size: 0.98rem;
    margin: 0;
    line-height: 1.35;
    font-weight: 700;
}

.manual-toc-count {
    flex-shrink: 0;
    font-size: 0.78rem;
    font-weight: 700;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.3rem 0.6rem;
    border-radius: 999px;
}

.manual-toc-nav {
    max-height: calc(100vh - 220px);
    overflow-y: auto;
    padding: 0.5rem;
}

.manual-toc-link {
    display: flex;
    align-items: flex-start;
    gap: 0.65rem;
    color: var(--manual-ink);
    text-decoration: none;
    padding: 0.72rem 0.75rem;
    border-radius: 12px;
    margin-bottom: 0.15rem;
    line-height: 1.35;
    border-left: 3px solid transparent;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.manual-toc-num {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--manual-muted);
    min-width: 1.5rem;
    padding-top: 0.1rem;
}

.manual-toc-title {
    font-size: 0.92rem;
    font-weight: 500;
}

.manual-toc-link:hover {
    background: #eef6f3;
}

.manual-toc-link.active {
    background: #e8f6f1;
    border-left-color: var(--manual-accent);
    color: #06724f;
}

.manual-toc-link.active .manual-toc-num {
    color: var(--manual-accent);
}

.manual-toc-back {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.85rem 1rem;
    border-top: 1px solid var(--manual-line);
    color: var(--manual-muted);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 600;
    background: var(--manual-soft);
}

.manual-toc-back:hover {
    color: var(--manual-accent);
    background: #e8f6f1;
}

.manual-content {
    background: var(--manual-panel);
    border: 1px solid var(--manual-line);
    border-radius: 22px;
    padding: clamp(1.2rem, 3vw, 2.2rem);
    box-shadow: 0 12px 32px rgba(16, 32, 51, 0.08);
}

.manual-content-head {
    padding-bottom: 1rem;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--manual-line);
}

.manual-content h1,
.manual-prose h2,
.manual-prose h3,
.manual-prose h4 {
    font-family: "Noto Sans Thai", Tahoma, sans-serif;
    font-weight: 700;
    color: var(--manual-ink);
    line-height: 1.22;
}

.manual-content-head h1 {
    font-size: clamp(1.8rem, 3.4vw, 2.5rem);
    margin: 0 0 0.75rem;
}

.manual-prose h2 { font-size: 1.45rem; margin: 1.6rem 0 0.75rem; }
.manual-prose h3 { font-size: 1.2rem; margin: 1.3rem 0 0.6rem; }

.manual-prose p,
.manual-prose li {
    color: #2b3d52;
    line-height: 1.78;
}

.manual-prose ul,
.manual-prose ol {
    padding-left: 1.4rem;
    margin: 0.75rem 0 1rem;
}

.manual-prose blockquote {
    margin: 1rem 0;
    padding: 0.85rem 1rem;
    border-left: 4px solid var(--manual-accent);
    background: #f0faf6;
    border-radius: 0 12px 12px 0;
    color: #2b4a3e;
}

.manual-prose table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
    font-size: 0.95rem;
}

.manual-prose th,
.manual-prose td {
    border: 1px solid var(--manual-line);
    padding: 0.65rem 0.8rem;
    text-align: left;
}

.manual-prose th {
    background: var(--manual-soft);
    font-weight: 700;
}

.manual-prose img {
    max-width: 100%;
    height: auto;
    border-radius: 16px;
    border: 1px solid var(--manual-line);
}

.manual-prose a {
    color: #2563eb;
}

.manual-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 0;
    color: var(--manual-muted);
    font-size: 0.88rem;
}

.manual-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: var(--manual-soft);
    color: var(--manual-muted);
}

.manual-pill i {
    font-size: 0.8rem;
    opacity: 0.85;
}

.manual-pager {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.85rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--manual-line);
}

.manual-pager-link {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    padding: 1rem 1.1rem;
    border: 1px solid var(--manual-line);
    border-radius: 14px;
    text-decoration: none;
    color: var(--manual-ink);
    background: var(--manual-soft);
    transition: border-color 0.15s ease, transform 0.15s ease;
}

.manual-pager-link:hover {
    border-color: rgba(11, 143, 105, 0.45);
    transform: translateY(-2px);
}

.manual-pager-link.next {
    text-align: right;
    align-items: flex-end;
}

.manual-pager-dir {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--manual-accent);
}

.manual-pager-title {
    font-weight: 600;
    font-size: 0.95rem;
    line-height: 1.35;
}

.manual-assets {
    margin-top: 2rem;
    border-top: 1px solid var(--manual-line);
    padding-top: 1.2rem;
}

.manual-assets h2 {
    font-size: 1.15rem;
    margin: 0 0 1rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

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

.manual-figure {
    margin: 0;
    border: 1px solid var(--manual-line);
    border-radius: 14px;
    overflow: hidden;
    background: var(--manual-soft);
}

.manual-figure img {
    width: 100%;
    height: auto;
    display: block;
}

.manual-figure figcaption {
    color: var(--manual-muted);
    font-size: 0.88rem;
    padding: 0.65rem 0.85rem;
}

/* --- Index / grid views --- */
.manual-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.manual-card {
    background: var(--manual-panel);
    border: 1px solid var(--manual-line);
    border-radius: 18px;
    padding: 1.25rem 1.3rem;
    text-decoration: none;
    color: var(--manual-ink);
    box-shadow: 0 10px 28px rgba(16, 32, 51, 0.07);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.manual-card:hover {
    transform: translateY(-3px);
    border-color: rgba(11, 143, 105, 0.45);
    box-shadow: 0 16px 36px rgba(16, 32, 51, 0.1);
}

.manual-card h2,
.manual-card h3 {
    margin: 0 0 0.55rem;
    font-size: 1.15rem;
    color: var(--manual-ink);
}

.manual-card p {
    margin: 0;
    color: var(--manual-muted);
    line-height: 1.55;
    font-size: 0.95rem;
}

.manual-empty {
    background: var(--manual-panel);
    border: 1px dashed var(--manual-line);
    border-radius: 18px;
    padding: 2rem;
    color: var(--manual-muted);
    text-align: center;
}

.manual-empty a {
    color: var(--manual-accent);
    font-weight: 600;
}

@media (max-width: 900px) {
    .manual-top {
        padding: 1rem 0 0.85rem;
    }

    .manual-body {
        padding-top: 1.15rem;
        padding-bottom: 4.5rem;
    }

    .manual-body--page {
        padding-top: 1rem;
    }

    .manual-hero--bleed {
        padding: 1.75rem 0;
        margin-bottom: 1rem;
    }

    .manual-hero h1 {
        font-size: 1.65rem;
    }

    .manual-toc-toggle {
        display: flex;
    }

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

    .manual-toc {
        position: fixed;
        top: auto;
        left: 1rem;
        right: 1rem;
        bottom: 0.8rem;
        z-index: 1200;
        max-height: 70vh;
        transform: translateY(110%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .manual-toc.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .manual-toc-nav {
        max-height: calc(70vh - 140px);
    }

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

    .manual-pager-link.next {
        text-align: left;
        align-items: flex-start;
    }
}