/* ==========================================================================
   Catalog Interactive Viewer — Full-screen scroll layout
   ========================================================================== */

/* Prevent outer page scroll, hide standard header/navbar/footer */
html:has(.ds-viewer) {
    overflow: hidden;
}

html:has(.ds-viewer) .ds-header,
html:has(.ds-viewer) .ds-navbar,
html:has(.ds-viewer) .ds-mobile-tabs,
html:has(.ds-viewer) .ds-footer {
    display: none;
}

/* ---------- Layout ---------- */
.ds-viewer {
    display: grid;
    grid-template-columns: 260px 1fr 280px;
    grid-template-rows: auto 1fr;
    height: 100vh;
    overflow: hidden;
}

/* ---------- Compact Viewer Header ---------- */
.ds-viewer__header {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 0 16px;
    height: 48px;
    background: var(--ds-white);
    border-bottom: 1px solid var(--ds-border);
    transition: height 0.3s, opacity 0.2s;
    z-index: 10;
}

.ds-viewer.is-header-hidden .ds-viewer__header {
    height: 0;
    opacity: 0;
    overflow: hidden;
    border-bottom-width: 0;
}

.ds-viewer__header-logo img {
    height: 28px;
    width: auto;
}

.ds-viewer__header-tabs {
    display: flex;
    gap: 2px;
    margin-left: auto;
}

.ds-viewer__header-tab {
    padding: 6px 20px;
    font-size: 13px;
    font-weight: 600;
    color: var(--ds-gray-dark);
    border-radius: 4px;
    transition: all 0.15s;
    text-transform: uppercase;
}

.ds-viewer__header-tab:hover {
    background: var(--ds-gray-light);
    color: var(--ds-black);
}

.ds-viewer__header-tab.is-active {
    background: var(--ds-orange);
    color: var(--ds-white);
}

.ds-viewer__header-search {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--ds-gray-light);
    border: 1px solid var(--ds-border);
    cursor: pointer;
    color: var(--ds-gray-dark);
    padding: 6px 14px 6px 10px;
    margin-left: 8px;
    border-radius: 20px;
    font-size: 13px;
    font-family: var(--ds-font);
    transition: all 0.15s;
}

.ds-viewer__header-search:hover {
    background: var(--ds-white);
    border-color: var(--ds-orange);
    color: var(--ds-orange);
}

/* ---------- Menu Dropdown ---------- */
.ds-viewer__header-menu-wrap {
    position: relative;
}

.ds-viewer__header-menu-btn {
    display: flex;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px 6px;
    border-radius: 4px;
    transition: background 0.15s;
}

.ds-viewer__header-menu-btn span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--ds-gray-dark);
    border-radius: 1px;
    transition: background 0.15s;
}

.ds-viewer__header-menu-btn:hover {
    background: var(--ds-gray-light);
}

.ds-viewer__header-menu-btn:hover span {
    background: var(--ds-orange);
}

.ds-viewer__header-dropdown[hidden] {
    display: none;
}

.ds-viewer__header-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--ds-white);
    border: 1px solid var(--ds-border);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
    min-width: 240px;
    z-index: 100;
    overflow: hidden;
}

.ds-viewer__header-dropdown-flags {
    display: flex;
    gap: 6px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--ds-border);
}

.ds-viewer__header-dropdown-nav {
    display: flex;
    flex-direction: column;
    padding: 8px 0;
}

.ds-viewer__header-dropdown-nav a {
    display: block;
    padding: 10px 16px;
    font-size: 14px;
    color: var(--ds-black);
    text-decoration: none;
    transition: all 0.15s;
}

.ds-viewer__header-dropdown-nav a:hover {
    background: #fff5ee;
    color: var(--ds-orange);
}

.ds-viewer__header-dropdown-home {
    display: block;
    padding: 12px 16px;
    font-size: 13px;
    font-weight: 600;
    color: var(--ds-orange);
    text-decoration: none;
    border-top: 1px solid var(--ds-border);
    transition: background 0.15s;
}

.ds-viewer__header-dropdown-home:hover {
    background: #fff5ee;
}

/* ---------- Chapter Index (left sidebar) ---------- */
.ds-viewer__chapters {
    grid-row: 2;
    background: var(--ds-white);
    border-right: 1px solid var(--ds-border);
    overflow-y: auto;
    padding: 12px 0 120px;
}

.ds-viewer__chapters-title {
    font-size: 13px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--ds-gray-dark);
    padding: 0 12px 8px;
    border-bottom: 1px solid var(--ds-border);
    margin: 0 0 4px;
}

.ds-viewer__chapter-link {
    display: flex;
    gap: 4px;
    padding: 6px 12px;
    font-size: 12px;
    color: var(--ds-black);
    text-decoration: none;
    border-left: 3px solid transparent;
    transition: all 0.15s;
}

.ds-viewer__chapter-link:hover {
    background: var(--ds-gray-light);
    color: var(--ds-orange);
}

.ds-viewer__chapter-link.is-active {
    border-left-color: var(--ds-orange);
    background: #fff5ee;
    color: var(--ds-orange);
    font-weight: 600;
}

.ds-viewer__chapter-num {
    font-weight: 700;
    min-width: 22px;
}

.ds-viewer__chapter-name {
    line-height: 1.3;
}

/* Subcategories */
.ds-viewer__subcats {
    display: none;
    padding: 2px 0 4px 29px;
}

.ds-viewer__chapter-group.is-active .ds-viewer__subcats {
    display: block;
}

.ds-viewer__subcat-link {
    display: block;
    padding: 3px 12px 3px 0;
    font-size: 11px;
    color: var(--ds-gray-dark);
    text-decoration: none;
    line-height: 1.3;
    transition: color 0.15s;
}

.ds-viewer__subcat-link:hover {
    color: var(--ds-orange);
}

.ds-viewer__subcat-link.is-active {
    color: var(--ds-orange);
    font-weight: 600;
}

/* Mobile chapter dropdown (hidden on desktop) */
.ds-viewer__chapter-select {
    display: none;
}

/* ---------- Main Viewer (center) ---------- */
.ds-viewer__main {
    grid-row: 2;
    display: flex;
    flex-direction: column;
    background: #e8e8e8;
    overflow: hidden;
}

.ds-viewer__topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 16px;
    background: var(--ds-black);
    color: var(--ds-white);
    font-size: 12px;
    font-weight: 600;
    flex-shrink: 0;
    z-index: 5;
    gap: 12px;
}

.ds-viewer__topbar-chapter {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-width: 0;
}

.ds-viewer__topbar-page-wrap {
    flex: 1;
    text-align: center;
    position: relative;
}

.ds-viewer__topbar-page {
    color: var(--ds-gray);
    white-space: nowrap;
    cursor: pointer;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.3);
    padding-bottom: 1px;
}

.ds-viewer__topbar-page:hover {
    color: var(--ds-white);
    border-bottom-color: rgba(255, 255, 255, 0.6);
}

.ds-viewer__topbar-page-input {
    display: none;
    width: 80px;
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 3px;
    color: var(--ds-white);
    font-size: 12px;
    font-weight: 600;
    font-family: var(--ds-font);
    text-align: center;
    padding: 2px 6px;
    outline: none;
}

.ds-viewer__topbar-page-input:focus {
    background: rgba(255, 255, 255, 0.25);
    border-color: var(--ds-orange);
}

.ds-viewer__topbar-page-wrap.is-editing .ds-viewer__topbar-page {
    display: none;
}

.ds-viewer__topbar-page-wrap.is-editing .ds-viewer__topbar-page-input {
    display: inline-block;
}

/* Right group: zoom + nav */
.ds-viewer__topbar-right {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

/* Prev/Next nav */
.ds-viewer__topbar-nav {
    display: flex;
    gap: 2px;
    flex-shrink: 0;
}

.ds-viewer__nav-btn {
    background: rgba(255, 255, 255, 0.15);
    color: var(--ds-white);
    border: none;
    border-radius: 3px;
    width: 28px;
    height: 24px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    line-height: 1;
}

.ds-viewer__nav-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Zoom controls */
.ds-viewer__topbar-zoom {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

.ds-viewer__zoom-btn {
    background: rgba(255, 255, 255, 0.15);
    color: var(--ds-white);
    border: none;
    border-radius: 3px;
    width: 28px;
    height: 24px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    line-height: 1;
}

.ds-viewer__zoom-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

.ds-viewer__zoom-level {
    font-size: 11px;
    font-weight: 600;
    min-width: 36px;
    text-align: center;
    color: var(--ds-gray);
}

/* PDF download link */
.ds-viewer__topbar-pdf {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: rgba(255, 255, 255, 0.15);
    color: var(--ds-white);
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.15s;
    white-space: nowrap;
}

.ds-viewer__topbar-pdf:hover {
    background: rgba(255, 255, 255, 0.3);
}

.ds-viewer__topbar-pdf svg {
    flex-shrink: 0;
}

/* Toggle button — hidden on desktop, shown on tablet */
.ds-viewer__topbar-toggle {
    display: none;
}

/* Bottom sheet bar — hidden on desktop/tablet */
.ds-viewer__products-bar {
    display: none;
}

.ds-viewer__sheet-backdrop {
    display: none;
}

/* Scroll container — page-by-page snap */
.ds-viewer__scroll {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    position: relative;
    scroll-snap-type: none;
}

/* Zoomed: free scroll, no snap */
.ds-viewer__scroll.is-zoomed {
    scroll-snap-type: none;
    scroll-behavior: auto;
    overflow-x: auto;
}

/* Individual page — one full page per screen */
.ds-viewer__page {
    height: 100%;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    /* scroll-snap-align: start; */
    padding: 4px;
    box-sizing: border-box;
}

/* Default: fit to viewport height */
.ds-viewer__page-img {
    max-height: calc(100% - 8px);
    width: auto;
    max-width: 100%;
    display: block;
    background: var(--ds-white);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    cursor: zoom-in;
}

/* Zoomed: width-based sizing */
.ds-viewer__scroll.is-zoomed .ds-viewer__page {
    height: auto;
    min-height: 100%;
    scroll-snap-align: unset;
}

.ds-viewer__scroll.is-zoomed .ds-viewer__page-img {
    width: var(--viewer-zoom, 100%);
    max-height: none;
    max-width: none;
    cursor: zoom-out;
}

/* ---------- Product Sidebar (right) ---------- */
.ds-viewer__products {
    grid-row: 2;
    background: var(--ds-white);
    border-left: 2px solid var(--ds-orange);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.ds-viewer__products-header {
    background: var(--ds-orange);
    color: var(--ds-white);
    padding: 10px 14px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.5px;
    flex-shrink: 0;
}

.ds-viewer__products-list {
    flex: 1;
    overflow-y: auto;
    padding: 6px 8px;
}

/* Product card — compact */
.ds-viewer__product-card {
    border: 1px solid var(--ds-border);
    border-radius: 4px;
    padding: 6px 8px;
    margin-bottom: 5px;
    background: #fafafa;
    transition: border-color 0.15s;
}

.ds-viewer__product-card:hover {
    border-color: var(--ds-orange);
}

.ds-viewer__product-code {
    font-size: 13px;
    font-weight: 700;
    color: var(--ds-orange);
    margin: 0 0 1px;
}

.ds-viewer__product-title {
    font-size: 11px;
    font-weight: 600;
    color: var(--ds-black);
    margin: 0 0 1px;
    line-height: 1.2;
}

.ds-viewer__product-subcat {
    font-size: 10px;
    color: var(--ds-gray);
    margin: 0 0 4px;
}

.ds-viewer__product-cta {
    display: block;
    width: 100%;
    background: #333;
    color: var(--ds-white);
    border: none;
    border-radius: 3px;
    padding: 4px;
    font-size: 10px;
    font-weight: 700;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background 0.15s;
}

.ds-viewer__product-cta:hover {
    background: #222;
}

/* Sidebar states */
.ds-viewer__products-empty,
.ds-viewer__products-error {
    padding: 20px 14px;
    text-align: center;
    font-size: 13px;
    color: var(--ds-gray-dark);
    line-height: 1.5;
}

.ds-viewer__products-error button {
    margin-top: 8px;
    background: var(--ds-orange);
    color: white;
    border: none;
    border-radius: 4px;
    padding: 6px 16px;
    font-size: 12px;
    cursor: pointer;
}

/* Skeleton loading */
.ds-viewer__skeleton {
    padding: 10px;
}

.ds-viewer__skeleton-card {
    border: 1px solid var(--ds-border);
    border-radius: 6px;
    padding: 10px;
    margin-bottom: 8px;
}

.ds-viewer__skeleton-bar {
    background: linear-gradient(90deg, #eee 25%, #f5f5f5 50%, #eee 75%);
    background-size: 200% 100%;
    animation: ds-shimmer 1.5s infinite;
    border-radius: 3px;
    height: 12px;
    margin-bottom: 6px;
}

.ds-viewer__skeleton-bar--short { width: 60%; }
.ds-viewer__skeleton-bar--medium { width: 80%; }

@keyframes ds-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

@keyframes ds-slide-up {
    from { transform: translateY(100%); }
    to { transform: translateY(0); }
}

/* ---------- Contact Modal ---------- */
.ds-viewer__modal[hidden] {
    display: none;
}

.ds-viewer__modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ds-viewer__modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
}

.ds-viewer__modal-content {
    position: relative;
    background: var(--ds-white);
    border-radius: 8px;
    width: 560px;
    max-width: 95vw;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.ds-viewer__modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    background: var(--ds-orange);
    color: var(--ds-white);
    font-weight: 700;
    font-size: 15px;
    border-radius: 8px 8px 0 0;
}

.ds-viewer__modal-close {
    background: none;
    border: none;
    color: var(--ds-white);
    font-size: 24px;
    cursor: pointer;
    line-height: 1;
    padding: 0;
}

.ds-viewer__modal-body {
    padding: 18px;
}

.ds-viewer__modal-product {
    padding: 12px 0;
    margin-bottom: 0;
    font-size: 13px;
}

.ds-viewer__modal-product-code {
    color: var(--ds-orange);
    font-weight: 700;
    font-size: 16px;
    margin: 0 0 4px;
}

.ds-viewer__modal-product-name {
    font-weight: 700;
    font-size: 15px;
    margin: 0 0 4px;
    line-height: 1.3;
}

.ds-viewer__modal-product-catalog {
    color: var(--ds-gray);
    font-size: 12px;
    margin: 0;
}

/* Product description */
.ds-viewer__modal-description {
    margin-bottom: 14px;
    padding: 10px 12px;
    background: var(--ds-gray-light);
    border-radius: 6px;
    font-size: 13px;
    line-height: 1.5;
    color: #333;
}

.ds-viewer__modal-description p {
    margin: 0;
}

/* Specs table */
.ds-viewer__modal-specs-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 12px;
    margin-bottom: 16px;
}

.ds-viewer__modal-specs-table th,
.ds-viewer__modal-specs-table td {
    padding: 7px 10px;
    text-align: left;
    border-bottom: 1px solid var(--ds-border);
    vertical-align: top;
}

.ds-viewer__modal-specs-table th {
    width: 35%;
    font-weight: 600;
    color: var(--ds-gray-dark);
    white-space: nowrap;
    background: #fafafa;
}

.ds-viewer__modal-specs-table td {
    color: #333;
    line-height: 1.4;
}

/* CTA button in specs */
.ds-viewer__modal-cta {
    display: block;
    width: 100%;
    padding: 12px;
    background: var(--ds-orange);
    color: var(--ds-white);
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    margin-top: 8px;
}

.ds-viewer__modal-cta:hover {
    opacity: 0.9;
}

/* Loading */
.ds-viewer__modal-loading {
    text-align: center;
    padding: 20px;
    color: var(--ds-gray);
    font-size: 13px;
}

/* Contact section title */
.ds-viewer__modal-contact-title {
    font-size: 15px;
    font-weight: 700;
    margin: 16px 0 8px;
    padding-top: 16px;
    border-top: 2px solid var(--ds-orange);
}

.ds-viewer__form-group {
    margin-bottom: 10px;
}

.ds-viewer__form-group label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--ds-gray-dark);
    margin-bottom: 3px;
}

.ds-viewer__form-group input,
.ds-viewer__form-group textarea {
    width: 100%;
    border: 1px solid var(--ds-border);
    border-radius: 4px;
    padding: 8px 10px;
    font-size: 13px;
    font-family: var(--ds-font);
    box-sizing: border-box;
}

.ds-viewer__form-group input:focus,
.ds-viewer__form-group textarea:focus {
    outline: none;
    border-color: var(--ds-orange);
    box-shadow: 0 0 0 2px rgba(232, 119, 34, 0.15);
}

.ds-viewer__form-submit {
    width: 100%;
    background: #333;
    color: var(--ds-white);
    border: none;
    border-radius: 4px;
    padding: 12px;
    font-size: 14px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.15s;
    margin-top: 4px;
}

.ds-viewer__form-submit:hover {
    background: #222;
}

.ds-viewer__form-submit:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.ds-viewer__form-feedback {
    text-align: center;
    padding: 10px;
    border-radius: 4px;
    font-size: 13px;
    margin-top: 10px;
}

.ds-viewer__form-feedback--success {
    background: #e8f5e9;
    color: #2e7d32;
}

.ds-viewer__form-feedback--error {
    background: #ffebee;
    color: #c62828;
}

/* ---------- Responsive: Tablet (768-1023px) ---------- */
@media (max-width: 1023px) {
    .ds-viewer {
        display: flex;
        flex-direction: column;
        height: 100vh;
    }

    .ds-viewer__header {
        flex-shrink: 0;
    }

    .ds-viewer__chapters {
        display: none;
    }

    .ds-viewer__chapter-select {
        display: block;
        width: 100%;
        padding: 8px 14px;
        font-size: 13px;
        font-weight: 600;
        border: none;
        border-bottom: 2px solid var(--ds-orange);
        background: var(--ds-white);
        color: var(--ds-black);
        appearance: auto;
        flex-shrink: 0;
    }

    .ds-viewer__chapter-select optgroup {
        font-weight: 700;
        font-size: 13px;
        color: var(--ds-black);
    }

    .ds-viewer__chapter-select option {
        font-weight: 400;
        font-size: 13px;
    }

    .ds-viewer__main {
        flex: 65;
        min-height: 0;
    }

    .ds-viewer__products {
        flex: 35;
        border-left: none;
        border-top: 2px solid var(--ds-orange);
        max-height: none;
        transition: flex 0.3s ease-out, opacity 0.2s;
    }

    /* Toggle: expanded page, hidden products */
    .ds-viewer.is-products-hidden .ds-viewer__products {
        flex: 0;
        overflow: hidden;
        opacity: 0;
        border-top-width: 0;
    }

    .ds-viewer.is-products-hidden .ds-viewer__main {
        flex: 1;
    }

    /* Toggle button visible on tablet */
    .ds-viewer__topbar-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.15);
        color: var(--ds-white);
        border: none;
        border-radius: 3px;
        width: 28px;
        height: 24px;
        font-size: 14px;
        cursor: pointer;
        transition: background 0.15s;
    }

    .ds-viewer__topbar-toggle:hover {
        background: rgba(255, 255, 255, 0.3);
    }

    /* Compact product cards on tablet */
    .ds-viewer__product-card {
        display: flex;
        align-items: center;
        gap: 8px;
        padding: 5px 8px;
    }

    .ds-viewer__product-code {
        font-size: 12px;
        margin: 0;
        min-width: 60px;
    }

    .ds-viewer__product-title {
        font-size: 11px;
        margin: 0;
        flex: 1;
    }

    .ds-viewer__product-subcat {
        display: none;
    }

    .ds-viewer__product-cta {
        width: auto;
        padding: 3px 8px;
        font-size: 9px;
        flex-shrink: 0;
    }
}

/* ---------- Responsive: Mobile (<768px) ---------- */
@media (max-width: 767px) {
    .ds-viewer__header {
        height: 48px;
        padding: 0 8px;
        gap: 6px;
    }

    .ds-viewer__header-logo img {
        height: 24px;
    }

    .ds-viewer__header-tab {
        font-size: 11px;
        padding: 5px 8px;
        white-space: nowrap;
    }

    .ds-viewer__header-search span {
        display: none;
    }

    .ds-viewer__header-search {
        padding: 6px;
        margin-left: 4px;
    }

    .ds-viewer__topbar {
        font-size: 13px;
        padding: 8px 12px;
        min-height: 40px;
    }

    .ds-viewer__topbar-zoom {
        display: none;
    }

    .ds-viewer__topbar-right {
        display: none;
    }

    .ds-viewer__topbar-page-wrap {
        text-align: right;
    }

    /* Mobile: continuous scroll — auto-height pages, full-width images */
    .ds-viewer__scroll {
        padding-bottom: 48px; /* space for bottom sheet bar */
    }

    .ds-viewer__page {
        height: auto;
        padding: 0;
        display: block; /* remove flex centering */
    }

    .ds-viewer__page-img {
        width: 100%;
        height: auto;
        max-height: none;
        max-width: 100%;
        box-shadow: none;
        aspect-ratio: 210 / 297; /* A4 — reserve space before lazy-load */
    }

    /* Bottom Sheet — Product Sidebar */
    .ds-viewer__products {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 70vh;
        max-height: none;
        flex: none;
        border-left: none;
        border-top: none;
        border-radius: 12px 12px 0 0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
        transform: translateY(calc(100% - 44px));
        transition: transform 0.3s ease-out;
        z-index: 50;
        display: flex;
        flex-direction: column;
    }

    .ds-viewer__products.is-expanded {
        transform: translateY(0);
    }

    .ds-viewer__products.is-empty {
        transform: translateY(calc(100% - 44px));
    }

    /* Drag bar (mobile only) */
    .ds-viewer__products-bar {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 10px 16px 8px;
        background: var(--ds-orange);
        cursor: grab;
        flex-shrink: 0;
        border-radius: 12px 12px 0 0;
        min-height: 48px;
    }

    .ds-viewer__products-handle {
        width: 40px;
        height: 5px;
        background: rgba(255, 255, 255, 0.6);
        border-radius: 3px;
        margin-bottom: 6px;
    }

    .ds-viewer__products-bar-text {
        color: var(--ds-white);
        font-size: 13px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }

    /* Hide desktop products header on mobile (bar replaces it) */
    .ds-viewer__products-header {
        display: none;
    }

    .ds-viewer__products-list {
        flex: 1;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
    }

    /* Backdrop */
    .ds-viewer__sheet-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: 49;
    }

    .ds-viewer__sheet-backdrop[hidden] {
        display: none;
    }

    /* Product cards: restore vertical layout on mobile */
    .ds-viewer__product-card {
        display: block;
    }

    .ds-viewer__product-code {
        font-size: 12px;
        margin: 0 0 1px;
    }

    .ds-viewer__product-title {
        font-size: 10px;
        margin: 0 0 1px;
    }

    .ds-viewer__product-subcat {
        display: block;
    }

    .ds-viewer__product-cta {
        width: 100%;
        padding: 4px;
        font-size: 10px;
    }

    /* Hide native select on mobile — replaced by custom drawer */
    .ds-viewer__chapter-select {
        display: none !important;
    }

    /* Chapter drawer trigger (reuses select slot) */
    .ds-viewer__drawer-trigger {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 12px 16px;
        background: var(--ds-white);
        border: none;
        border-bottom: 2px solid var(--ds-orange);
        font-size: 14px;
        font-weight: 600;
        color: var(--ds-black);
        cursor: pointer;
        flex-shrink: 0;
        font-family: var(--ds-font);
        min-height: 48px; /* tap target Apple HIG */
    }

    .ds-viewer__drawer-trigger-arrow {
        color: var(--ds-orange);
        font-size: 22px;
        margin-left: 8px;
        line-height: 1;
    }

    /* Full-width chapter drawer overlay */
    .ds-viewer__drawer[hidden] { display: none; }

    .ds-viewer__drawer {
        position: fixed;
        inset: 0;
        z-index: 200;
    }

    .ds-viewer__drawer-backdrop {
        position: absolute;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
    }

    .ds-viewer__drawer-panel {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        max-height: 80vh;
        background: var(--ds-white);
        border-radius: 14px 14px 0 0;
        display: flex;
        flex-direction: column;
        animation: ds-slide-up 0.25s ease-out;
    }

    .ds-viewer__drawer-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 14px 16px;
        border-bottom: 2px solid var(--ds-orange);
        font-weight: 700;
        font-size: 16px;
        flex-shrink: 0;
    }

    .ds-viewer__drawer-close {
        background: none;
        border: none;
        font-size: 32px;
        cursor: pointer;
        color: var(--ds-gray-dark);
        padding: 4px 8px;
        line-height: 1;
        min-width: 44px;
        min-height: 44px;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .ds-viewer__drawer-list {
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding: 4px 0 env(safe-area-inset-bottom, 16px);
    }

    .ds-viewer__drawer-group {
        border-bottom: 1px solid var(--ds-border);
    }

    .ds-viewer__drawer-group:last-child {
        border-bottom: none;
    }

    .ds-viewer__drawer-link {
        display: block;
        padding: 13px 16px;
        text-decoration: none;
        color: var(--ds-black);
        font-size: 15px;
        -webkit-tap-highlight-color: rgba(232, 119, 34, 0.1);
    }

    .ds-viewer__drawer-link:active {
        background: #fff5ee;
    }

    .ds-viewer__drawer-link.is-chapter {
        font-weight: 700;
    }

    .ds-viewer__drawer-num {
        color: var(--ds-orange);
        margin-right: 6px;
    }

    .ds-viewer__drawer-link.is-subcat {
        padding-left: 40px;
        font-size: 14px;
        color: #555;
    }

    .ds-viewer__drawer-link.is-active {
        color: var(--ds-orange);
        background: #fff5ee;
    }

    /* Hide nav arrows and toggle button on mobile — gesture-only */
    .ds-viewer__topbar-nav,
    .ds-viewer__topbar-toggle {
        display: none;
    }

    .ds-viewer__topbar-pdf {
        padding: 6px 12px;
        font-size: 13px;
        min-height: 36px;
    }

    .ds-viewer__topbar-pdf svg {
        width: 18px;
        height: 18px;
    }

    /* Modal: bottom-anchored on mobile */
    .ds-viewer__modal {
        align-items: flex-end;
    }

    .ds-viewer__modal-content {
        width: 100vw;
        max-width: 100vw;
        max-height: 85vh;
        border-radius: 12px 12px 0 0;
        animation: ds-slide-up 0.3s ease-out;
    }

    .ds-viewer__modal-header {
        border-radius: 12px 12px 0 0;
    }
}

/* ---------- Responsive: Phone Landscape (short height) ---------- */
@media (max-height: 500px) and (max-width: 1023px) {
    /* Full-screen catalog: hide header, select, products */
    .ds-viewer__header {
        display: none;
    }

    .ds-viewer__chapter-select {
        display: none !important;
    }

    .ds-viewer__chapters {
        display: none;
    }

    /* Stack vertically, give all space to main */
    .ds-viewer {
        display: flex;
        flex-direction: column;
    }

    .ds-viewer__main {
        flex: 1;
        min-height: 0;
    }

    /* Compact topbar */
    .ds-viewer__topbar {
        font-size: 11px;
        padding: 2px 10px;
    }

    /* Hide nav arrows and toggle — gesture-only */
    .ds-viewer__topbar-nav,
    .ds-viewer__topbar-toggle {
        display: none;
    }

    .ds-viewer__topbar-right {
        display: none;
    }

    .ds-viewer__topbar-page-wrap {
        text-align: right;
    }

    /* Full-width images, auto height, continuous scroll */
    .ds-viewer__scroll {
        padding-bottom: 44px;
    }

    .ds-viewer__page {
        height: auto;
        padding: 0;
        display: block;
    }

    .ds-viewer__page-img {
        width: 100%;
        height: auto;
        max-height: none;
        max-width: 100%;
        box-shadow: none;
        aspect-ratio: 210 / 297; /* A4 — reserve space before lazy-load */
    }

    /* Bottom sheet for products (like mobile portrait) */
    .ds-viewer__products {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 70vh;
        max-height: none;
        flex: none;
        border-left: none;
        border-top: none;
        border-radius: 12px 12px 0 0;
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
        transform: translateY(calc(100% - 44px));
        transition: transform 0.3s ease-out;
        z-index: 50;
        display: flex;
        flex-direction: column;
    }

    .ds-viewer__products.is-expanded {
        transform: translateY(0);
    }

    .ds-viewer__products-bar {
        display: flex;
        flex-direction: column;
        align-items: center;
        padding: 8px 16px 6px;
        background: var(--ds-orange);
        cursor: grab;
        flex-shrink: 0;
        border-radius: 12px 12px 0 0;
        min-height: 40px;
    }

    .ds-viewer__products-handle {
        width: 36px;
        height: 5px;
        background: rgba(255, 255, 255, 0.6);
        border-radius: 3px;
        margin-bottom: 4px;
    }

    .ds-viewer__products-bar-text {
        color: var(--ds-white);
        font-size: 12px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }

    .ds-viewer__products-header {
        display: none;
    }

    .ds-viewer__sheet-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.3);
        z-index: 49;
    }

    .ds-viewer__sheet-backdrop[hidden] {
        display: none;
    }

    /* Show drawer trigger */
    .ds-viewer__drawer-trigger {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: 8px 14px;
        background: var(--ds-white);
        border: none;
        border-bottom: 2px solid var(--ds-orange);
        font-size: 13px;
        font-weight: 600;
        color: var(--ds-black);
        cursor: pointer;
        flex-shrink: 0;
        font-family: var(--ds-font);
        min-height: 40px;
    }

    .ds-viewer__drawer-trigger-arrow {
        color: var(--ds-orange);
        font-size: 20px;
        margin-left: 8px;
        line-height: 1;
    }
}

/* ==========================================================================
   Indice 2026 integrato nel viewer (overlay) — navigatore PDF Dragan
   ========================================================================== */

/* Cataloghi migrati: la sidebar resta come RIFERIMENTO ATTIVO (sempre visibile su desktop);
   l'overlay full-screen è l'ingresso e si riapre col bottone "Indice".
   Si nascondono solo select-tablet e drawer-trigger-mobile (ridondanti col bottone Indice). */
.ds-viewer--has-index .ds-viewer__chapter-select,
.ds-viewer--has-index .ds-viewer__drawer-trigger { display: none !important; }

/* Bottone "Indice" nella topbar */
.ds-viewer__index-btn {
    display: inline-flex; align-items: center; gap: 7px;
    margin-right: 12px; padding: 6px 14px;
    background: var(--ds-orange, #e87722); color: #fff;
    border: 0; border-radius: 5px;
    font: 600 13px/1 var(--ds-font, sans-serif);
    cursor: pointer; white-space: nowrap;
    transition: background 0.14s ease;
}
.ds-viewer__index-btn:hover,
.ds-viewer__index-btn:focus-visible { background: var(--ds-orange-dark, #cf6512); outline: none; }
.ds-viewer__index-btn:focus-visible { box-shadow: 0 0 0 3px rgba(232, 119, 34, 0.45); }

/* Overlay */
.ds-vindex { position: fixed; inset: 0; z-index: 1000; }
.ds-vindex[hidden] { display: none; }
.ds-vindex__backdrop { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.5); }
.ds-vindex__panel {
    position: absolute; inset: 0;                 /* FULL SCREEN */
    background: var(--ds-bg, #f5f5f0); display: flex; flex-direction: column;
    animation: dsVindexIn 0.16s ease;
}
@keyframes dsVindexIn { from { opacity: 0; } to { opacity: 1; } }
.ds-vindex__header {
    flex: 0 0 auto;
    display: flex; align-items: center; justify-content: space-between;
    padding: 16px clamp(20px, 4vw, 40px); background: var(--ds-black, #222); color: #fff;
}
.ds-vindex__title { font-weight: 700; font-size: clamp(1.05rem, 2vw, 1.35rem); }
.ds-vindex__close { background: none; border: 0; color: #fff; font-size: 32px; line-height: 1; cursor: pointer; padding: 0 6px; }
.ds-vindex__close:hover { color: var(--ds-orange, #e87722); }
/* Honeypot anti-spam: fuori schermo (non display:none, alcuni bot lo saltano) */
.ds-viewer__hp { position: absolute; left: -9999px; top: -9999px; width: 1px; height: 1px; overflow: hidden; }
/* Consenso privacy (GDPR) nel form contatti */
.ds-viewer__form-privacy { display: flex; align-items: flex-start; gap: 8px; font-size: 0.85rem; color: #555; margin: 4px 0 14px; line-height: 1.4; cursor: pointer; }
.ds-viewer__form-privacy input { margin-top: 2px; flex: 0 0 auto; }
.ds-viewer__form-privacy a { color: var(--ds-orange, #e87722); text-decoration: underline; }
/* --- Ricerca prodotti dentro l'indice (scoped al catalogo) --- */
.ds-vindex__search { flex: 1 1 auto; min-width: 0; display: flex; justify-content: center; padding: 0 16px; }
.ds-vindex__search-input {
    width: 100%; max-width: 440px;
    background-color: rgba(255, 255, 255, 0.14);
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Ccircle cx='11' cy='11' r='7'/%3E%3Cline x1='21' y1='21' x2='16.65' y2='16.65'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: 15px center;
    background-size: 17px 17px;
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 999px;
    color: #fff; font-size: 0.9rem; font-family: inherit;
    padding: 9px 18px 9px 42px; outline: none;
    transition: background-color .15s, border-color .15s;
}
.ds-vindex__search-input::placeholder { color: rgba(255, 255, 255, 0.6); }
.ds-vindex__search-input:focus { border-color: var(--ds-orange, #e87722); background-color: rgba(255, 255, 255, 0.22); }
/* Pulsante "pulisci" nativo (type=search): × bianca visibile sull'header scuro */
.ds-vindex__search-input::-webkit-search-cancel-button {
    -webkit-appearance: none; appearance: none;
    width: 15px; height: 15px; margin-left: 8px; cursor: pointer; opacity: 0.65;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23ffffff' stroke-width='2.5' stroke-linecap='round'%3E%3Cline x1='6' y1='6' x2='18' y2='18'/%3E%3Cline x1='18' y1='6' x2='6' y2='18'/%3E%3C/svg%3E");
    background-repeat: no-repeat; background-position: center; background-size: contain;
}
.ds-vindex__search-input::-webkit-search-cancel-button:hover { opacity: 1; }
.ds-vindex__results { display: flex; flex-direction: column; gap: 8px; }
.ds-vindex__results[hidden] { display: none; }
.ds-vindex__body.is-searching > :not(.ds-vindex__results) { display: none; }
.ds-vindex__result {
    display: flex; align-items: center; gap: 14px; width: 100%;
    padding: 10px 14px; text-decoration: none; color: #333;
    background: #fff; border: 1px solid var(--ds-border, #d9d4c8); border-radius: 10px;
    transition: box-shadow .15s, border-color .15s;
}
.ds-vindex__result:hover { border-color: var(--ds-orange, #e87722); box-shadow: 0 2px 10px rgba(0, 0, 0, .08); }
.ds-vindex__result-thumb { flex: 0 0 auto; width: 52px; height: 52px; object-fit: contain; background: #fff; border: 1px solid #eee; border-radius: 6px; }
.ds-vindex__result-info { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; gap: 2px; }
.ds-vindex__result-title { font-weight: 600; font-size: 0.92rem; color: #222; }
.ds-vindex__result-meta { font-size: 0.78rem; color: #888; }
.ds-vindex__result-pag { flex: 0 0 auto; font-size: 0.8rem; font-weight: 700; color: var(--ds-orange, #e87722); white-space: nowrap; }
.ds-vindex__result-msg { padding: 26px 8px; text-align: center; color: #888; }
.ds-vindex__result-count { font-size: 0.9rem; font-weight: 700; color: #222; letter-spacing: 0.01em; padding: 2px 4px 10px; }
.ds-vindex__result-count::before { content: ""; display: inline-block; width: 8px; height: 8px; margin-right: 8px; border-radius: 50%; background: var(--ds-orange, #e87722); vertical-align: middle; }
.ds-vindex__body {
    flex: 1 1 auto; overflow-y: auto; -webkit-overflow-scrolling: touch;
    padding: clamp(16px, 2.5vw, 32px);
    max-width: 860px; margin: 0 auto; width: 100%;   /* colonna verticale unica — stessa misura sui 3 cataloghi */
}

.ds-vindex__chapter { background: #fff; border: 1px solid var(--ds-border, #d9d4c8); border-radius: 10px; overflow: hidden; margin-bottom: 14px; }
.ds-vindex__chapter-head {
    display: flex; align-items: center; gap: 10px;
    padding: 11px 18px; text-decoration: none;
    background: #f5f5f0; color: var(--ds-black, #222); font-weight: 700;
}
.ds-vindex__chapter-head:hover,
.ds-vindex__chapter-head:focus-visible { background: #fff7f0; outline: none; }
.ds-vindex__chapter-num {
    flex: 0 0 auto; width: 24px; height: 24px;
    display: inline-flex; align-items: center; justify-content: center;
    background: var(--ds-orange, #e87722); color: #fff; border-radius: 50%; font-size: 0.8rem;
}
.ds-vindex__chapter-thumb {
    flex: 0 0 auto; width: 46px; height: 46px;
    object-fit: contain; background: #fff; border-radius: 5px; padding: 2px;
}
.ds-vindex__section--text {
    display: block; padding: 10px 16px;
    color: #777; font-size: 0.86rem; line-height: 1.4; font-style: italic;
    background: #faf7f2; border: 1px dashed var(--ds-border, #d9d4c8); border-radius: 10px;
}
.ds-vindex__section--text:hover { border-color: var(--ds-border, #d9d4c8); box-shadow: none; }
.ds-vindex__sections { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.ds-vindex__sections > li { display: block; }
.ds-vindex__section {
    display: flex; align-items: center; gap: 14px; width: 100%;
    padding: 12px 16px; text-decoration: none;
    color: #333; background: #fff;
    border: 1px solid var(--ds-border, #d9d4c8); border-radius: 10px;
    transition: box-shadow .15s, border-color .15s;
}
.ds-vindex__thumb {
    flex: 0 0 auto; width: 58px; height: 58px;
    object-fit: contain; background: #fff;
    border: 1px solid #eee; border-radius: 5px; padding: 2px;
}
.ds-vindex__section-text {
    flex: 1 1 auto; min-width: 0;
    display: flex; align-items: baseline; justify-content: space-between; gap: 10px;
}
/* Miniature nella sidebar (riferimento attivo) */
.ds-viewer--has-index .ds-viewer__subcat-link { display: flex; align-items: center; gap: 8px; }
.ds-viewer__subcat-thumb {
    flex: 0 0 auto; width: 30px; height: 30px;
    object-fit: contain; background: #fff; border: 1px solid #eee; border-radius: 3px;
}
.ds-viewer__subcat-name { flex: 1 1 auto; min-width: 0; }
.ds-viewer__subcat-pag { flex: 0 0 auto; font-size: 10px; font-weight: 700; color: var(--ds-orange, #e87722); white-space: nowrap; }
.ds-viewer__subcat-en { display: block; font-size: 9px; color: #999; font-style: italic; line-height: 1.25; }
.ds-vindex__section:hover,
.ds-vindex__section:focus-visible { border-color: var(--ds-orange, #e87722); box-shadow: 0 2px 10px rgba(0,0,0,.08); outline: none; }
.ds-vindex__section-label { flex: 1 1 auto; font-size: 0.92rem; line-height: 1.4; color: #222; }
.ds-vindex__section-meta { flex: 0 0 auto; display: flex; align-items: center; gap: 5px; white-space: nowrap; }
.ds-vindex__ei { font-size: 0.66rem; font-weight: 600; color: #b3541e; background: #fbe9dc; border-radius: 4px; padding: 2px 7px; white-space: nowrap; }
.ds-vindex__ei--p { color: #1e5fb3; background: #dceafb; }
.ds-vindex__ei-lab { text-transform: uppercase; font-size: 0.56rem; font-weight: 700; opacity: 0.7; letter-spacing: 0.03em; margin-right: 3px; }
.ds-vindex__pag { font-size: 0.74rem; font-weight: 700; color: var(--ds-orange, #e87722); }
.ds-vindex__section-en { display: block; font-size: 0.74rem; color: #8a8a8a; font-style: italic; line-height: 1.3; margin-top: 1px; }

@media (max-width: 600px) {
    .ds-vindex__ei { display: none; }
    .ds-vindex__body { padding: 14px; }
}

/* --- Indice ALFABETICO bilingue (Ascensori): A-Z multi-colonna, toggle IT/EN, no figure --- */
.ds-vindex__langs { display: inline-flex; gap: 4px; margin-left: auto; margin-right: 16px; }
.ds-vindex__lang {
    border: 1px solid rgba(255, 255, 255, 0.45); background: transparent; color: #fff;
    font-weight: 700; font-size: 0.8rem; padding: 4px 13px; border-radius: 4px; cursor: pointer;
}
.ds-vindex__lang.is-active { background: var(--ds-orange, #e87722); border-color: var(--ds-orange, #e87722); }
.ds-vindex--alpha .ds-vindex__body { max-width: 860px; }    /* stessa misura degli altri cataloghi */
.ds-vindex__lang-block[hidden] { display: none; }
/* Introduzione "Metodo di ricerca alfabetico" (fedele al PDF, pag.1 indice) */
.ds-vindex__intro {
    background: #fff; border: 1px solid var(--ds-border, #d9d4c8);
    border-left: 4px solid var(--ds-orange, #e87722); border-radius: 10px;
    padding: 14px 18px; margin: 0 0 18px;
}
.ds-vindex__intro-title { font-weight: 800; font-size: 0.92rem; color: #222; text-transform: uppercase; letter-spacing: 0.02em; }
.ds-vindex__intro-ex { font-weight: 700; font-size: 0.84rem; color: var(--ds-orange, #e87722); margin: 4px 0 8px; }
.ds-vindex__intro-steps { margin: 0; padding-left: 1.3em; color: #444; font-size: 0.85rem; line-height: 1.5; }
.ds-vindex__intro-steps li { margin: 2px 0; }
.ds-vindex__letter { margin: 0 0 12px; }
.ds-vindex__letter-h {
    margin: 0 0 4px; font-size: 1.1rem; font-weight: 800; color: var(--ds-orange, #e87722);
    border-bottom: 2px solid var(--ds-border, #d9d4c8); padding-bottom: 2px;
}
.ds-vindex__aentries { list-style: none; margin: 0; padding: 0; }
.ds-vindex__aentry {
    display: flex; align-items: baseline; gap: 10px; justify-content: space-between;
    padding: 9px 18px; text-decoration: none; color: #333;
    border-bottom: 1px solid #f4f4f4;
}
.ds-vindex__aentry:hover, .ds-vindex__aentry:focus-visible { background: #fff7f0; outline: none; }
.ds-vindex__aentry-label { flex: 1 1 auto; font-size: 0.88rem; line-height: 1.35; }
.ds-vindex__aentry-cap { flex: 0 0 auto; font-size: 0.74rem; font-weight: 700; color: var(--ds-orange, #e87722); white-space: nowrap; }

/* --- Toggle modalità indice (A-Z / Per categoria) --- */
.ds-vindex__modes { display: inline-flex; gap: 4px; margin-left: auto; }
/* In A-Z (langs IT/EN visibili) è langs a spingere a destra il gruppo: i modes
   restano adiacenti (niente secondo auto che li separerebbe). In "Per categoria"
   (langs hidden) i modes riprendono margin-left:auto e vanno a destra da soli. */
.ds-vindex__langs:not([hidden]) ~ .ds-vindex__modes { margin-left: 0; }
.ds-vindex__mode { border: 1px solid rgba(255, 255, 255, 0.45); background: transparent; color: #fff; font-weight: 700; font-size: 0.8rem; padding: 4px 13px; border-radius: 6px; cursor: pointer; }
.ds-vindex__mode.is-active { background: var(--ds-orange, #e87722); color: #fff; border-color: var(--ds-orange, #e87722); }
.ds-vindex__mode-block[hidden] { display: none; }

/* --- Indice a 2 livelli, L1 = LISTA capitoli (riga: numero + figura + nome) --- */
.ds-vindex__l1 { display: flex; flex-direction: column; gap: 8px; }
.ds-vindex__l1[hidden], .ds-vindex__l2[hidden] { display: none; }
.ds-vindex__chapcard { display: flex; flex-direction: row; align-items: center; gap: 16px; width: 100%; padding: 12px 18px; border: 1px solid var(--ds-border, #d9d4c8); border-radius: 10px; background: #fff; cursor: pointer; text-align: left; transition: box-shadow .15s, border-color .15s; }
.ds-vindex__chapcard:hover { border-color: var(--ds-orange, #e87722); box-shadow: 0 2px 10px rgba(0,0,0,.08); }
.ds-vindex__chapcard-thumb { flex: 0 0 auto; width: 104px; height: 78px; object-fit: contain; }
.ds-vindex__chapcard-num { order: -1; flex: 0 0 auto; display: inline-flex; width: 24px; height: 24px; align-items: center; justify-content: center; background: var(--ds-orange, #e87722); color: #fff; border-radius: 50%; font-weight: 700; font-size: 0.8rem; }
.ds-vindex__chapcard-name { font-weight: 600; font-size: 0.95rem; color: #222; }
.ds-vindex__l2-head {
    display: flex; align-items: center; gap: 14px;
    position: sticky; top: calc(-1 * clamp(16px, 2.5vw, 32px)); z-index: 5;
    background: var(--ds-bg, #f5f5f0);
    margin: 0 calc(-1 * clamp(16px, 2.5vw, 32px)) 14px;
    padding: clamp(14px, 2vw, 20px) clamp(16px, 2.5vw, 32px);
    border-bottom: 1px solid var(--ds-border, #d9d4c8);
}
.ds-vindex__l2-back { font-size: 0.8rem; padding: 6px 12px; border: 1px solid var(--ds-border, #d9d4c8); background: #fff; border-radius: 6px; cursor: pointer; }
.ds-vindex__l2-title { font-weight: 700; font-size: 1.05rem; display: inline-flex; align-items: center; gap: 10px; }

/* --- Card capitolo senza figura (Ascensori L1): stessa riga, niente spazio thumb --- */
.ds-vindex__chapcard--nofig { gap: 12px; }

.ds-vindex__langs[hidden] { display: none; }