/* ==========================================================================
   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;
}

.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;
}

.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);
}

/* 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: var(--ds-orange);
    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: var(--ds-orange-dark);
}

/* 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: var(--ds-orange);
    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: var(--ds-orange-dark);
}

.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: 40px;
        padding: 0 10px;
        gap: 8px;
    }

    .ds-viewer__header-logo img {
        height: 22px;
    }

    .ds-viewer__header-tab {
        font-size: 11px;
        padding: 4px 10px;
    }

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

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

    .ds-viewer__topbar {
        font-size: 11px;
        padding: 4px 10px;
    }

    .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;
    }

    /* 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: 8px 16px 6px;
        background: var(--ds-orange);
        cursor: grab;
        flex-shrink: 0;
        border-radius: 12px 12px 0 0;
    }

    .ds-viewer__products-handle {
        width: 32px;
        height: 4px;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 2px;
        margin-bottom: 4px;
    }

    .ds-viewer__products-bar-text {
        color: var(--ds-white);
        font-size: 11px;
        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: 10px 14px;
        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);
    }

    .ds-viewer__drawer-trigger-arrow {
        color: var(--ds-orange);
        font-size: 12px;
        margin-left: 8px;
    }

    /* 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: 26px;
        cursor: pointer;
        color: var(--ds-gray-dark);
        padding: 0 4px;
        line-height: 1;
    }

    .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;
    }

    /* 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;
    }

    /* 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: 6px 16px 4px;
        background: var(--ds-orange);
        cursor: grab;
        flex-shrink: 0;
        border-radius: 12px 12px 0 0;
    }

    .ds-viewer__products-handle {
        width: 32px;
        height: 4px;
        background: rgba(255, 255, 255, 0.5);
        border-radius: 2px;
        margin-bottom: 2px;
    }

    .ds-viewer__products-bar-text {
        color: var(--ds-white);
        font-size: 10px;
        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: 6px 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);
    }

    .ds-viewer__drawer-trigger-arrow {
        color: var(--ds-orange);
        font-size: 12px;
        margin-left: 8px;
    }
}