.pdf-flipbook-cover {
    cursor: pointer;
    transition: transform 0.2s;
}

.pdf-flipbook-cover:hover {
    transform: scale(1.05);
}

.pdf-flipbook-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.pdf-flipbook-inner {
    position: relative;
    width: 100vw;
    height: 100dvh;
    background: #111;
    padding: 5px;
    overflow: hidden;
    box-sizing: border-box;
}

#flipbook {
    width: 100%;
    height: 100%;
}

#flipbook,
#flipbook .page,
#flipbook .page img {
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}

#flipbook .page {
    overflow: hidden !important;
    background: #fff !important;
    margin: 0 !important;
    padding: 0 !important;
}

#flipbook .page img {
    width: 100%;
    height: 100%;
    display: block;
    margin: 0;
    padding: 0;
    border: none;
}

.pdf-flipbook-close {
    position: absolute;
    top: 10px;
    right: 15px;
    font-size: 30px;
    color: #fff;
    cursor: pointer;
    z-index: 10000;
    transition: opacity 0.2s ease;
}

.pdf-flipbook-close:hover {
    opacity: 0.7;
}

.pdf-flipbook-loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff !important;
    z-index: 9998;
}

.pdf-loader-spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.2);
    border-top: 5px solid #fff !important;
    border-radius: 50%;
    animation: pdfSpin 1s linear infinite;
    margin-bottom: 15px;
}

@keyframes pdfSpin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.pdf-loader-text {
    font-size: 16px;
    color: #fff !important;
}

/* Flipbook navigation arrows */

.flipbook-nav {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 54px;
    height: 54px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.65);
    color: #fff;
    font-size: 34px;
    line-height: 54px;
    text-align: center;
    cursor: pointer;
    z-index: 9999;
    user-select: none;
    transition:
        background 0.2s ease,
        opacity 0.2s ease,
        transform 0.2s ease;
    opacity: 0.85;
}

.flipbook-nav:hover {
    background: rgba(0, 0, 0, 0.85);
    opacity: 1;
}

.flipbook-prev {
    left: 15px;
}

.flipbook-next {
    right: 15px;
    animation: flipbookPulseRight 1.8s infinite;
}

.flipbook-prev:hover,
.flipbook-next:hover {
    transform: translateY(-50%) scale(1.08);
}

.flipbook-rotate-notice {
    display: none;
}

.stf__parent {
    width: 100% !important;
    height: 100% !important;
    max-height: 100% !important;
    overflow: hidden !important;
}

/* Subtle first-use animation */

@keyframes flipbookPulseRight {
    0% {
        transform: translateY(-50%) translateX(0);
    }

    50% {
        transform: translateY(-50%) translateX(5px);
    }

    100% {
        transform: translateY(-50%) translateX(0);
    }
}

/* Mobile adjustments */
@media (max-width: 768px) {

    .pdf-flipbook-inner {
        width: 100vw;
        height: 100dvh;
        padding: 5px;
        border-radius: 0;
        box-sizing: border-box;
        overflow: hidden;
    }

    .flipbook-nav {
        width: 42px;
        height: 42px;
        line-height: 42px;
        font-size: 24px;
        opacity: 0.9;
    }

    .flipbook-next {
        right: 8px;
    }

    .pdf-flipbook-close {
        top: 5px;
        right: 10px;
        font-size: 26px;
        z-index: 10000;
    }

}

@media (max-width: 768px) and (orientation: portrait) {

    .flipbook-rotate-notice {
        display: block;
        position: absolute;
        top: 15px;
        left: 50%;
        transform: translateX(-50%);
        background: rgba(0, 0, 0, 0.75);
        color: #fff;
        padding: 8px 14px;
        border-radius: 6px;
        font-size: 13px;
        z-index: 10000;
    }

}

@media (max-width: 950px) and (orientation: landscape) {

    .pdf-flipbook-inner {
        padding: 0;
        overflow: hidden;
    }

    #flipbook {
        width: 100%;
        height: 100dvh !important;

        display: flex;
        align-items: flex-start;
        justify-content: center;

        transform: translateY(-18px);
    }

    .pdf-flipbook-close {
        top: 2px;
        right: 8px;
        font-size: 22px;
    }

    .flipbook-nav {
        width: 38px;
        height: 38px;
        line-height: 38px;
        font-size: 20px;
    }

}