/* BV Flipbook Styles v2.0 - Isolated */

/* ══════════════════════════════════════════════
   Reset and isolate from theme
══════════════════════════════════════════════ */

.bv-flipbook-container,
.bv-flipbook-container *,
.bv-flipbook-container *::before,
.bv-flipbook-container *::after {
    box-sizing: border-box !important;
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

.bv-flipbook-container {
    position: relative !important;
    overflow: hidden !important;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif !important;
    border-radius: 8px !important;
    display: block !important;
    min-height: 400px !important;
}

.bv-flipbook-container button {
    background: none;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.bv-flipbook-wrapper {
    display: flex !important;
    flex-direction: column !important;
    height: 100% !important;
    width: 100% !important;
    position: relative !important;
}

/* ══════════════════════════════════════════════
   Loading
══════════════════════════════════════════════ */

.bv-flipbook-loading {
    position: absolute !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    color: #fff !important;
    z-index: 100 !important;
}

.bv-flipbook-spinner {
    width: 40px !important;
    height: 40px !important;
    border: 3px solid rgba(255,255,255,0.2) !important;
    border-top-color: #fff !important;
    border-radius: 50% !important;
    animation: bv-spin 0.8s linear infinite !important;
}

.bv-page-loading {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    width: 100% !important;
    height: 100% !important;
    min-height: 400px !important;
    background: rgba(255,255,255,0.05) !important;
}

.bv-page-loading .bv-flipbook-spinner {
    width: 30px !important;
    height: 30px !important;
}

@keyframes bv-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ══════════════════════════════════════════════
   Logo
══════════════════════════════════════════════ */

.bv-flipbook-logo {
    position: absolute !important;
    top: 12px !important;
    left: 12px !important;
    right: auto !important;
    bottom: auto !important;
    z-index: 10 !important;
}

.bv-flipbook-logo img {
    max-height: 40px !important;
    width: auto !important;
}

/* ══════════════════════════════════════════════
   Viewer
══════════════════════════════════════════════ */

.bv-flipbook-viewer {
    flex: 1 1 auto !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    padding: 20px 70px !important;
    position: relative !important;
    overflow: hidden !important;
    min-height: 400px !important;
}

/* ══════════════════════════════════════════════
   Navigation buttons
══════════════════════════════════════════════ */

.bv-nav-btn {
    position: absolute !important;
    top: 50% !important;
    bottom: auto !important;
    margin-top: -24px !important;
    background: rgba(0,0,0,0.6) !important;
    border: none !important;
    border-radius: 50% !important;
    width: 48px !important;
    height: 48px !important;
    min-width: 48px !important;
    min-height: 48px !important;
    max-width: 48px !important;
    max-height: 48px !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    z-index: 999 !important;
    padding: 0 !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    margin-bottom: 0 !important;
    transform: none !important;
    transition: background 0.2s ease !important;
    float: none !important;
}

.bv-nav-btn:hover {
    background: rgba(0,0,0,0.8) !important;
    transform: none !important;
}

.bv-nav-btn:focus {
    outline: none !important;
    transform: none !important;
}

.bv-nav-btn:active {
    transform: none !important;
}

.bv-nav-btn svg {
    width: 24px !important;
    height: 24px !important;
    display: block !important;
}

.bv-nav-prev {
    left: 15px !important;
    right: auto !important;
}

.bv-nav-next {
    right: 15px !important;
    left: auto !important;
}

/* ══════════════════════════════════════════════
   Book container
══════════════════════════════════════════════ */

.bv-flipbook-book {
    position: relative !important;
    display: flex !important;
    flex-direction: row !important;
    perspective: 2500px !important;
    transform-origin: center center !important;
    will-change: transform !important;
    transition: transform 0.1s ease !important;
}

/* ══════════════════════════════════════════════
   Pages
══════════════════════════════════════════════ */

.bv-flipbook-page-left,
.bv-flipbook-page-right {
    position: relative !important;
    background: #fff !important;
    display: block !important;
    float: none !important;
}

.bv-page-inner {
    position: relative !important;
    display: block !important;
    line-height: 0 !important;
}

.bv-flipbook-page-left {
    border-radius: 4px 0 0 4px !important;
    box-shadow: -5px 0 15px rgba(0,0,0,0.2), 0 0 10px rgba(0,0,0,0.1) !important;
}

.bv-flipbook-page-right {
    border-radius: 0 4px 4px 0 !important;
    box-shadow: 5px 0 15px rgba(0,0,0,0.2), 0 0 10px rgba(0,0,0,0.1) !important;
}

.bv-flipbook-page-left img,
.bv-flipbook-page-right img {
    display: block !important;
    max-height: calc(var(--bv-viewer-height, 80vh) - 60px) !important;
    max-width: 42vw !important;
    height: auto !important;
    width: auto !important;
    object-fit: contain !important;
    float: none !important;
    margin: 0 !important;
    padding: 0 !important;
}

/* Page spine shadow */
.bv-flipbook-page-left .bv-page-inner::after,
.bv-flipbook-page-right .bv-page-inner::before {
    content: '' !important;
    position: absolute !important;
    top: 0 !important;
    width: 30px !important;
    height: 100% !important;
    pointer-events: none !important;
    z-index: 5 !important;
}

.bv-flipbook-page-left .bv-page-inner::after {
    right: 0 !important;
    left: auto !important;
    background: linear-gradient(to left, rgba(0,0,0,0.15), transparent) !important;
}

.bv-flipbook-page-right .bv-page-inner::before {
    left: 0 !important;
    right: auto !important;
    background: linear-gradient(to right, rgba(0,0,0,0.15), transparent) !important;
}

/* ══════════════════════════════════════════════
   Bookmark button on page
══════════════════════════════════════════════ */

.bv-page-bookmark {
    position: absolute !important;
    top: 10px !important;
    right: 10px !important;
    left: auto !important;
    bottom: auto !important;
    background: rgba(0,0,0,0.7) !important;
    border: none !important;
    border-radius: 4px !important;
    width: 36px !important;
    height: 36px !important;
    min-width: 36px !important;
    min-height: 36px !important;
    max-width: 36px !important;
    max-height: 36px !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    color: #fff !important;
    opacity: 0.85 !important;
    z-index: 50 !important;
    padding: 0 !important;
    margin: 0 !important;
    transform: none !important;
    transition: opacity 0.15s ease, background 0.15s ease !important;
    float: none !important;
}

.bv-page-bookmark:hover {
    opacity: 1 !important;
    background: rgba(0,0,0,0.85) !important;
    transform: none !important;
}

.bv-page-bookmark:focus {
    outline: none !important;
    transform: none !important;
}

.bv-page-bookmark:active {
    transform: none !important;
}

.bv-page-bookmark.active {
    opacity: 1 !important;
    color: #fbbf24 !important;
    background: rgba(0,0,0,0.8) !important;
}

.bv-page-bookmark svg {
    width: 18px !important;
    height: 18px !important;
    display: block !important;
}

/* ══════════════════════════════════════════════
   Page numbers
══════════════════════════════════════════════ */

.bv-page-number {
    position: absolute !important;
    bottom: 10px !important;
    top: auto !important;
    font-size: 12px !important;
    color: #666 !important;
    background: rgba(255,255,255,0.9) !important;
    padding: 3px 10px !important;
    border-radius: 4px !important;
    z-index: 5 !important;
    line-height: 1.4 !important;
}

.bv-flipbook-page-left .bv-page-number {
    left: 10px !important;
    right: auto !important;
}

.bv-flipbook-page-right .bv-page-number {
    right: 10px !important;
    left: auto !important;
}

/* ══════════════════════════════════════════════
   Page flip animation
══════════════════════════════════════════════ */

.bv-flipbook-page-flip {
    position: absolute !important;
    top: 0 !important;
    width: 50% !important;
    height: 100% !important;
    transform-style: preserve-3d !important;
    z-index: 100 !important;
    pointer-events: none !important;
    display: none !important;
}

.bv-flipbook-page-flip.flip-to-left,
.bv-flipbook-page-flip.flip-to-right {
    display: block !important;
}

.bv-flipbook-page-flip.flip-to-left {
    right: 0 !important;
    left: auto !important;
    transform-origin: left center !important;
    animation: flipLeft 0.5s ease-in-out forwards !important;
}

.bv-flipbook-page-flip.flip-to-right {
    left: 0 !important;
    right: auto !important;
    transform-origin: right center !important;
    animation: flipRight 0.5s ease-in-out forwards !important;
}

.bv-flip-front,
.bv-flip-back {
    position: absolute !important;
    width: 100% !important;
    height: 100% !important;
    backface-visibility: hidden !important;
    background: #fff !important;
    overflow: hidden !important;
    box-shadow: 0 0 20px rgba(0,0,0,0.3) !important;
}

.bv-flip-front {
    z-index: 2 !important;
}

.bv-flip-back {
    transform: rotateY(180deg) !important;
}

.bv-flip-front img,
.bv-flip-back img {
    width: 100% !important;
    height: 100% !important;
    object-fit: contain !important;
}

@keyframes flipLeft {
    0% { transform: rotateY(0deg); }
    100% { transform: rotateY(-180deg); }
}

@keyframes flipRight {
    0% { transform: rotateY(0deg); }
    100% { transform: rotateY(180deg); }
}

/* ══════════════════════════════════════════════
   R3 — Single-page mode flip
══════════════════════════════════════════════ */

.bv-flipbook-book.single-page-mode .bv-flipbook-page-flip {
    width: 100% !important;
}

.bv-flipbook-book.single-page-mode .bv-flipbook-page-flip.flip-to-left {
    left: 0 !important;
    right: auto !important;
    transform-origin: left center !important;
}

.bv-flipbook-book.single-page-mode .bv-flipbook-page-flip.flip-to-right {
    left: 0 !important;
    right: auto !important;
    transform-origin: right center !important;
}

/* ══════════════════════════════════════════════
   R3 — Zoom cursor states
══════════════════════════════════════════════ */

.bv-flipbook-container.bv-zoomed .bv-flipbook-book {
    cursor: grab !important;
}

.bv-flipbook-container.bv-zoomed.is-panning .bv-flipbook-book {
    cursor: grabbing !important;
    transition: none !important;
}

/* ══════════════════════════════════════════════
   Controls bar
══════════════════════════════════════════════ */

.bv-flipbook-controls {
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 12px !important;
    padding: 12px !important;
    background: rgba(0,0,0,0.4) !important;
    flex-shrink: 0 !important;
    position: relative !important;
}

.bv-ctrl-btn {
    background: rgba(255,255,255,0.1) !important;
    border: none !important;
    border-radius: 6px !important;
    width: 36px !important;
    height: 36px !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    transition: background 0.2s, opacity 0.2s !important;
    text-decoration: none !important;
    padding: 0 !important;
}

.bv-ctrl-btn:hover {
    background: rgba(255,255,255,0.25) !important;
}

.bv-ctrl-btn:disabled {
    cursor: default !important;
}

.bv-ctrl-btn svg {
    width: 20px !important;
    height: 20px !important;
}

.bv-page-info {
    display: flex !important;
    align-items: center !important;
    gap: 4px !important;
    font-size: 14px !important;
}

.bv-page-input {
    width: 50px !important;
    padding: 6px 8px !important;
    border: 1px solid rgba(255,255,255,0.3) !important;
    border-radius: 4px !important;
    background: rgba(0,0,0,0.3) !important;
    color: inherit !important;
    text-align: center !important;
    font-size: 14px !important;
}

.bv-page-input::-webkit-inner-spin-button,
.bv-page-input::-webkit-outer-spin-button {
    -webkit-appearance: none !important;
    margin: 0 !important;
}

/* ══════════════════════════════════════════════
   Thumbnails panel
══════════════════════════════════════════════ */

.bv-flipbook-thumbnails {
    position: absolute !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 60px !important;
    top: auto !important;
    width: 100% !important;
    max-height: 0 !important;
    overflow: hidden !important;
    background: rgba(0,0,0,0.95) !important;
    transition: max-height 0.3s ease, padding 0.3s ease !important;
    z-index: 80 !important;
    display: flex !important;
    flex-wrap: wrap !important;
    gap: 8px !important;
    padding: 0 !important;
    justify-content: center !important;
}

.bv-flipbook-thumbnails.open {
    max-height: 220px !important;
    overflow-y: auto !important;
    padding: 12px !important;
}

.bv-thumb {
    cursor: pointer !important;
    border: 2px solid transparent !important;
    border-radius: 4px !important;
    overflow: hidden !important;
    transition: border-color 0.2s, transform 0.2s !important;
}

.bv-thumb:hover {
    transform: scale(1.05) !important;
}

.bv-thumb.active {
    border-color: #4f9cf9 !important;
}

.bv-thumb img {
    display: block !important;
    height: 100px !important;
    width: auto !important;
}

.bv-thumb-placeholder {
    width: 70px !important;
    height: 100px !important;
    background: rgba(255,255,255,0.1) !important;
}

.bv-thumb span {
    display: block !important;
    text-align: center !important;
    font-size: 11px !important;
    color: #fff !important;
    padding: 4px !important;
    background: rgba(0,0,0,0.6) !important;
}

/* ══════════════════════════════════════════════
   Bookmarks panel
══════════════════════════════════════════════ */

.bv-flipbook-bookmarks-panel {
    position: absolute !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 60px !important;
    top: auto !important;
    width: 100% !important;
    max-height: 0 !important;
    overflow: hidden !important;
    background: rgba(0,0,0,0.95) !important;
    transition: max-height 0.3s ease !important;
    z-index: 80 !important;
}

.bv-flipbook-bookmarks-panel.open {
    max-height: 260px !important;
    overflow-y: auto !important;
}

.bv-bookmarks-empty {
    padding: 24px !important;
    text-align: center !important;
    color: #999 !important;
}

.bv-bookmarks-empty p {
    margin: 5px 0 !important;
}

.bv-bookmarks-hint {
    font-size: 12px !important;
    color: #666 !important;
}

.bv-bookmarks-header {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 12px 16px !important;
    border-bottom: 1px solid rgba(255,255,255,0.1) !important;
    color: #fff !important;
}

.bv-bookmark-current {
    background: rgba(79, 156, 249, 0.2) !important;
    border: 1px solid #4f9cf9 !important;
    color: #4f9cf9 !important;
    padding: 6px 12px !important;
    border-radius: 4px !important;
    cursor: pointer !important;
    font-size: 12px !important;
    transition: background 0.2s !important;
}

.bv-bookmark-current:hover {
    background: rgba(79, 156, 249, 0.35) !important;
}

.bv-bookmarks-list {
    padding: 8px !important;
}

.bv-bookmark-item {
    display: flex !important;
    justify-content: space-between !important;
    align-items: center !important;
    padding: 12px !important;
    margin: 4px 0 !important;
    background: rgba(255,255,255,0.05) !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    color: #fff !important;
    transition: background 0.2s !important;
}

.bv-bookmark-item:hover {
    background: rgba(255,255,255,0.12) !important;
}

.bv-bookmark-label {
    font-size: 14px !important;
}

.bv-bookmark-remove {
    background: none !important;
    border: none !important;
    color: #999 !important;
    font-size: 20px !important;
    cursor: pointer !important;
    padding: 0 6px !important;
    line-height: 1 !important;
    transition: color 0.2s !important;
}

.bv-bookmark-remove:hover {
    color: #ef4444 !important;
}

/* ══════════════════════════════════════════════
   Fullscreen
══════════════════════════════════════════════ */

.bv-flipbook-container.is-fullscreen {
    border-radius: 0 !important;
}

.bv-flipbook-container.is-fullscreen .bv-flipbook-page-left img,
.bv-flipbook-container.is-fullscreen .bv-flipbook-page-right img {
    max-height: calc(var(--bv-viewer-height, 100vh) - 60px) !important;
    max-width: 46vw !important;
}

/* ══════════════════════════════════════════════
   Cover mode — standalone centered cover page
══════════════════════════════════════════════ */

/* Center the single cover page in the book container */
.bv-flipbook-book.cover-mode {
    justify-content: center !important;
}

/* Cover page gets full rounded corners (no spine edge) */
.bv-flipbook-book.cover-mode .bv-flipbook-page-left {
    border-radius: 4px !important;
    box-shadow: 0 8px 40px rgba(0,0,0,0.5), 0 0 15px rgba(0,0,0,0.3) !important;
}

/* No spine shadow gradient on the cover's right edge */
.bv-flipbook-book.cover-mode .bv-flipbook-page-left .bv-page-inner::after {
    display: none !important;
}

/* Cover flip: full width of the cover, pivots from its left edge (the spine) */
.bv-flipbook-book.cover-mode .bv-flipbook-page-flip {
    width: 100% !important;
    left: 0 !important;
    right: auto !important;
}

/* ══════════════════════════════════════════════
   R3 — Mobile portrait (single-page layout)
══════════════════════════════════════════════ */

@media (max-width: 768px) and (orientation: portrait) {
    .bv-flipbook-viewer {
        padding: 15px 55px !important;
    }
    
    .bv-flipbook-book {
        flex-direction: column !important;
        align-items: center !important;
    }
    
    .bv-flipbook-page-left,
    .bv-flipbook-page-right {
        border-radius: 4px !important;
    }
    
    .bv-flipbook-page-left img,
    .bv-flipbook-page-right img {
        max-width: 85vw !important;
        max-height: calc(var(--bv-viewer-height, 80vh) - 60px) !important;
    }
    
    .bv-flipbook-page-left .bv-page-inner::after,
    .bv-flipbook-page-right .bv-page-inner::before {
        display: none !important;
    }
    
    .bv-nav-btn {
        width: 42px !important;
        height: 42px !important;
        min-width: 42px !important;
        min-height: 42px !important;
        max-width: 42px !important;
        max-height: 42px !important;
        margin-top: -21px !important;
    }
    
    .bv-nav-prev {
        left: 8px !important;
    }
    
    .bv-nav-next {
        right: 8px !important;
    }
    
    .bv-flipbook-controls {
        gap: 8px !important;
        padding: 10px !important;
        flex-wrap: wrap !important;
    }
    
    .bv-ctrl-btn {
        width: 34px !important;
        height: 34px !important;
    }
    
    .bv-flipbook-logo img {
        max-height: 30px !important;
    }
    
    .bv-thumb img {
        height: 70px !important;
    }
}

/* ══════════════════════════════════════════════
   R3 — Mobile landscape (two-page, adapted)
══════════════════════════════════════════════ */

@media (max-width: 900px) and (orientation: landscape) {
    .bv-flipbook-viewer {
        padding: 10px 55px !important;
    }

    .bv-flipbook-page-left img,
    .bv-flipbook-page-right img {
        max-width: 38vw !important;
        max-height: calc(var(--bv-viewer-height, 80vh) - 60px) !important;
    }

    .bv-nav-btn {
        width: 42px !important;
        height: 42px !important;
        min-width: 42px !important;
        min-height: 42px !important;
        max-width: 42px !important;
        max-height: 42px !important;
        margin-top: -21px !important;
    }

    .bv-nav-prev {
        left: 8px !important;
    }

    .bv-nav-next {
        right: 8px !important;
    }

    .bv-flipbook-controls {
        gap: 8px !important;
        padding: 8px !important;
        flex-wrap: wrap !important;
    }
    
    .bv-ctrl-btn {
        width: 32px !important;
        height: 32px !important;
    }

    .bv-flipbook-logo img {
        max-height: 28px !important;
    }
}

/* ══════════════════════════════════════════════
   R3 — Small mobile shared rules
══════════════════════════════════════════════ */

@media (max-width: 768px) {
    .bv-thumb img {
        height: 70px !important;
    }
}