.flipbook-container {
    position: relative;
    margin: 0 auto;
    overflow: hidden;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    box-sizing: border-box;
    font-family: sans-serif;
}

.flipbook-loading {
    color: #fff;
    font-size: 16px;
    font-weight: 500;
}

.flipbook-viewport {
    width: 100%;
    height: 100%;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    box-sizing: border-box;
    padding: 20px;
}

.flipbook-pages-wrapper {
    flex-grow: 1;
    position: relative;
    perspective: 1500px;
    width: 100%;
    height: calc(100% - 60px);
}

.flipbook-page {
    position: absolute;
    width: 50%;
    height: 100%;
    top: 0;
    background-color: #ffffff;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
    transition: transform 0.6s cubic-bezier(0.25, 1, 0.5, 1);
    transform-style: preserve-3d;
    transform-origin: left center;
    backface-visibility: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

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

/* Page positions and states */
.flipbook-page.page-left {
    left: 0;
    transform-origin: right center;
    border-top-left-radius: 4px;
    border-bottom-left-radius: 4px;
}

.flipbook-page.page-right {
    left: 50%;
    transform-origin: left center;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
}

/* Flip Animations */
.flipbook-page.page-right.flipped {
    transform: rotateY(-180deg);
    z-index: 5;
}

.flipbook-page.page-left.flipped {
    transform: rotateY(180deg);
    z-index: 5;
}

/* Navigation Controls Styling */
.flipbook-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    height: 40px;
    color: #ffffff;
    z-index: 10;
}

.flipbook-btn {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s ease;
}

.flipbook-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Responsiveness: Single page layout on mobile screen sizes */
@media (max-width: 767px) {
    .flipbook-page {
        width: 100%;
        left: 0 !important;
        transform-origin: center center !important;
    }
    .flipbook-page.page-left {
        display: none; /* simple stack implementation on mobile */
    }
    .flipbook-page.active-mobile {
        display: flex !important;
    }
}