/**
 * PDF Viewer Pro - Turn.js Integration Styles
 * Version: 2.3.0
 * Styles for Turn.js library integration
 */

/* Turn.js Book Container */
.pdf-flipbook-style .pdf-turn-book {
    margin: 0 auto;
    background: transparent;
}

/* Turn.js creates these classes automatically */
.pdf-flipbook-style .turn-page {
    background-color: white;
    background-size: 100% 100%;
    box-shadow:
        0 10px 40px rgba(0,0,0,0.7),
        0 3px 10px rgba(0,0,0,0.5),
        inset 0 0 2px rgba(0,0,0,0.1);
}

/* Individual Turn.js Pages */
.pdf-flipbook-style .pdf-turn-page {
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.pdf-flipbook-style .pdf-turn-page canvas {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

/* Page numbers on Turn.js pages */
.pdf-flipbook-style .pdf-turn-page .pdf-page-number {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.7);
    color: #ffff00;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    pointer-events: none;
    z-index: 10;
}

/* Turn.js wrapper adjustments */
.pdf-flipbook-style .pdf-pages-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    perspective: none; /* Turn.js handles perspective */
    transform-style: flat;
    min-height: 600px;
}

/* Turn.js shadow effects (enhanced) */
.pdf-flipbook-style .turn-page-wrapper {
    perspective: 2000px;
}

/* Turn.js even pages (right side in double mode) */
.pdf-flipbook-style .even .pdf-turn-page {
    box-shadow:
        -5px 0 15px rgba(0,0,0,0.2),
        0 5px 20px rgba(0,0,0,0.3);
}

/* Turn.js odd pages (left side in double mode) */
.pdf-flipbook-style .odd .pdf-turn-page {
    box-shadow:
        5px 0 15px rgba(0,0,0,0.2),
        0 5px 20px rgba(0,0,0,0.3);
}

/* Hard pages (Turn.js class for pages being flipped) */
.pdf-flipbook-style .hard {
    box-shadow:
        0 0 50px rgba(0,0,0,0.8),
        0 10px 30px rgba(0,0,0,0.6);
}

/* Turn.js gradient overlays */
.pdf-flipbook-style .turn-page .gradient {
    background-image: linear-gradient(
        to right,
        rgba(0,0,0,0.3) 0%,
        rgba(0,0,0,0) 100%
    );
}

/* Book spine shadow between pages */
.pdf-flipbook-style .pdf-turn-book .turn-page:nth-child(even)::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 3px;
    height: 100%;
    background: linear-gradient(
        to right,
        rgba(0,0,0,0.4) 0%,
        rgba(0,0,0,0.2) 50%,
        transparent 100%
    );
    pointer-events: none;
    z-index: 10;
}

/* Page curl shadow (Turn.js automatically adds this) */
.pdf-flipbook-style .shadow {
    background-image: linear-gradient(
        to right,
        rgba(0,0,0,0) 0%,
        rgba(0,0,0,0.3) 50%,
        rgba(0,0,0,0) 100%
    );
}

/* Hover effect on pages */
.pdf-flipbook-style .pdf-turn-page:hover {
    cursor: pointer;
}

/* Loading state for pages */
.pdf-flipbook-style .pdf-turn-page:empty::before {
    content: 'Loading...';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #666;
    font-size: 16px;
}

/* Turn.js next/previous page indicators */
.pdf-flipbook-style .turn-page-wrapper .turn-next,
.pdf-flipbook-style .turn-page-wrapper .turn-previous {
    cursor: pointer;
}

/* Responsive adjustments for Turn.js */
@media (max-width: 1024px) {
    .pdf-flipbook-style .pdf-turn-book {
        max-width: 90%;
    }

    .pdf-flipbook-style .pdf-pages-wrapper {
        padding: 30px 15px;
        min-height: 500px;
    }
}

@media (max-width: 768px) {
    .pdf-flipbook-style .pdf-turn-book {
        max-width: 95%;
    }

    .pdf-flipbook-style .pdf-pages-wrapper {
        padding: 20px 10px;
        min-height: 450px;
    }

    .pdf-flipbook-style .pdf-turn-page .pdf-page-number {
        bottom: 10px;
        font-size: 11px;
        padding: 4px 10px;
    }
}

@media (max-width: 600px) {
    .pdf-flipbook-style .pdf-pages-wrapper {
        padding: 15px 5px;
        min-height: 400px;
    }

    .pdf-flipbook-style .pdf-turn-page .pdf-page-number {
        bottom: 8px;
        font-size: 10px;
        padding: 3px 8px;
    }
}

/* Turn.js acceleration and hardware rendering */
.pdf-flipbook-style .turn-page {
    -webkit-transform: translateZ(0);
    -moz-transform: translateZ(0);
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    -moz-backface-visibility: hidden;
    backface-visibility: hidden;
}

/* Improve Turn.js page flip smoothness */
.pdf-flipbook-style .pdf-turn-book * {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Turn.js ignore click areas (for toolbar) */
.pdf-flipbook-style .turn-ignore {
    pointer-events: none;
}

/* Enhanced page flip animation */
.pdf-flipbook-style .turn-page.animated {
    transition: transform 0.6s cubic-bezier(0.645, 0.045, 0.355, 1);
}

/* Page edge highlights for interactivity */
.pdf-flipbook-style .pdf-turn-book:hover .turn-page:first-child {
    box-shadow:
        -3px 0 10px rgba(255, 255, 0, 0.2),
        0 5px 20px rgba(0,0,0,0.3);
}

.pdf-flipbook-style .pdf-turn-book:hover .turn-page:last-child {
    box-shadow:
        3px 0 10px rgba(255, 255, 0, 0.2),
        0 5px 20px rgba(0,0,0,0.3);
}

/* Turn.js zoom compatibility */
.pdf-flipbook-style .zoomed .pdf-turn-book {
    transform-origin: center center;
}

/* Print mode adjustments */
@media print {
    .pdf-flipbook-style .pdf-turn-book {
        box-shadow: none;
    }

    .pdf-flipbook-style .pdf-turn-page {
        page-break-inside: avoid;
        box-shadow: none;
    }
}