.wpfpdf-viewer {
    position: relative;
    width: 100%;
    max-width: 960px;
    margin: 30px auto;
    background: #000;
    border-radius: 0;
    overflow: hidden;
    font-family: canada-type-gibson, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.wpfpdf-book-container {
    position: relative;
    width: 100%;
    padding-top: 70%;
    overflow: hidden;
}

.wpfpdf-book {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 2500px;
}

.wpfpdf-pages {
    position: relative;
    width: 90%;
    height: 90%;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* Static spread (current visible pages) */
.wpfpdf-page-spread {
    display: flex;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.wpfpdf-page {
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.wpfpdf-page canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
}

.wpfpdf-page-single .wpfpdf-page {
    border-radius: 0;
}

.wpfpdf-page-left {
    border-radius: 0;
    border-right: 1px solid #dededd;
}

.wpfpdf-page-right {
    border-radius: 0;
}

/* =============================================
   3D Page Flip Animation
   ============================================= */

/* Base layer: sits behind the flipping page, shows the destination spread */
.wpfpdf-flip-base {
    display: flex;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

/* The turning page wrapper */
.wpfpdf-flip-page {
    position: absolute;
    top: 50%;
    transform-style: preserve-3d;
    z-index: 10;
}

/* Forward flip: page turns from right to left, pivot on left edge */
.wpfpdf-flip-page-forward {
    transform-origin: left center;
    animation: wpfpdf-turn-forward 0.6s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
}

/* Backward flip: page turns from left to right, pivot on right edge */
.wpfpdf-flip-page-backward {
    transform-origin: right center;
    animation: wpfpdf-turn-backward 0.6s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
}

@keyframes wpfpdf-turn-forward {
    0%   { transform: translateY(-50%) rotateY(0deg); }
    100% { transform: translateY(-50%) rotateY(-180deg); }
}

@keyframes wpfpdf-turn-backward {
    0%   { transform: translateY(-50%) rotateY(0deg); }
    100% { transform: translateY(-50%) rotateY(180deg); }
}

/* Front and back faces of the flipping page */
.wpfpdf-flip-front,
.wpfpdf-flip-back {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    overflow: hidden;
    background: #fff;
}

.wpfpdf-flip-front {
    z-index: 2;
}

.wpfpdf-flip-back {
    transform: rotateY(180deg);
    z-index: 1;
}

.wpfpdf-flip-front canvas,
.wpfpdf-flip-back canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
    object-fit: contain;
}

/* Shadow overlay that follows the fold */
.wpfpdf-flip-shadow {
    position: absolute;
    top: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 20;
}

.wpfpdf-flip-page-forward .wpfpdf-flip-shadow {
    right: 0;
    background: linear-gradient(to left, rgba(0,0,0,0.15) 0%, transparent 40%);
    animation: wpfpdf-shadow-forward 0.6s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
}

.wpfpdf-flip-page-backward .wpfpdf-flip-shadow {
    left: 0;
    background: linear-gradient(to right, rgba(0,0,0,0.15) 0%, transparent 40%);
    animation: wpfpdf-shadow-backward 0.6s cubic-bezier(0.4, 0.0, 0.2, 1) forwards;
}

@keyframes wpfpdf-shadow-forward {
    0%   { opacity: 0; }
    40%  { opacity: 1; }
    100% { opacity: 0; }
}

@keyframes wpfpdf-shadow-backward {
    0%   { opacity: 0; }
    40%  { opacity: 1; }
    100% { opacity: 0; }
}

/* =============================================
   Zoom
   ============================================= */

.wpfpdf-book-container {
    cursor: zoom-in;
}

.wpfpdf-zoomed .wpfpdf-book-container {
    cursor: zoom-out;
    overflow: hidden;
}

/* Smooth zoom-in / zoom-out transition (toggled via JS) */
.wpfpdf-page-spread.wpfpdf-zoom-animate {
    transition: transform 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* While actively panning — no transition, rAF drives it */
.wpfpdf-page-spread.wpfpdf-zoom-panning {
    transition: none;
    will-change: transform;
}

/* Hide nav buttons while zoomed */
.wpfpdf-zoomed .wpfpdf-prev,
.wpfpdf-zoomed .wpfpdf-next {
    opacity: 0.2;
    pointer-events: none;
}

/* Controls */
.wpfpdf-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    background: #000;
    border-top: 3px solid #9FF14C;
}

.wpfpdf-controls-left {
    flex: 1;
    min-width: 0;
}

.wpfpdf-controls-nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex: 0 0 auto;
}

.wpfpdf-controls-right {
    display: flex;
    gap: 8px;
    flex: 1;
    min-width: 0;
    justify-content: flex-end;
}

.wpfpdf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: 0;
    background: transparent;
    color: #fff;
    cursor: pointer;
    transition: color 0.2s, background 0.2s;
    text-decoration: none;
}

.wpfpdf-btn:hover {
    background: #9FF14C;
    color: #000;
}

.wpfpdf-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.wpfpdf-btn:disabled:hover {
    background: transparent;
    color: #fff;
}

.wpfpdf-btn-busy {
    background: #9FF14C;
    color: #000;
    pointer-events: none;
}

.wpfpdf-page-info {
    color: #9FF14C;
    font-size: 14px;
    font-weight: 600;
    min-width: 60px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

a.wpfpdf-download {
    color: #fff;
    text-decoration: none;
}

a.wpfpdf-download:hover {
    color: #000;
}

/* Loading */
.wpfpdf-loading {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.wpfpdf-loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(159, 241, 76, 0.3);
    border-top-color: #9FF14C;
    border-radius: 50%;
    animation: wpfpdf-spin 0.8s linear infinite;
    margin-left: 10px;
    vertical-align: middle;
}

@keyframes wpfpdf-spin {
    to { transform: rotate(360deg); }
}

/* Fullscreen */
.wpfpdf-viewer.wpfpdf-fullscreen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    max-width: none;
    margin: 0;
    border-radius: 0;
    z-index: 999999;
}

.wpfpdf-fullscreen .wpfpdf-book-container {
    padding-top: 0;
    height: calc(100vh - 64px);
}

/* Responsive */
@media (max-width: 768px) {
    .wpfpdf-book-container {
        padding-top: 130%;
    }

    .wpfpdf-btn {
        width: 36px;
        height: 36px;
    }

    .wpfpdf-controls {
        padding: 10px 12px;
    }

    .wpfpdf-controls-nav {
        gap: 6px;
    }

    .wpfpdf-page-info .wpfpdf-page-separator,
    .wpfpdf-page-info .wpfpdf-total-pages {
        display: none;
    }
}