/* Catalog Viewer Custom CSS Stylesheet */

#catalog-viewer {
    background-color: #0d131f; /* Premium dark slate background to make flyer content pop */
    user-select: none;
    -webkit-user-select: none;
}

/* 3D Book/Catalog Viewport */
#catalog-book {
    perspective: 2000px;
    position: relative;
    transform-style: preserve-3d;
    background: transparent;
}

/* Individual Page Frame */
.catalog-page {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: left center;
    transform-style: preserve-3d;
    transition: transform 0.9s cubic-bezier(0.25, 1, 0.5, 1), opacity 0.8s, z-index 0s;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    z-index: 5;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.7);
    background: #ffffff;
    opacity: 0;
    pointer-events: none;
}

/* Active top-most visible page */
.catalog-page.active {
    z-index: 25;
    transform: rotateY(0deg);
    opacity: 1;
    pointer-events: auto;
}

/* Back page (next page in stack) to create visual stack thickness */
.catalog-page.next-stack {
    z-index: 10;
    transform: rotateY(0deg) translateZ(-8px) scale(0.98);
    opacity: 0.9;
    pointer-events: none;
}

/* Deepest page in stack */
.catalog-page.next-stack-deep {
    z-index: 5;
    transform: rotateY(0deg) translateZ(-16px) scale(0.96);
    opacity: 0.7;
    pointer-events: none;
}

/* Flipped state (turned left) */
.catalog-page.flipped {
    transform: rotateY(-180deg) translateZ(0px);
    opacity: 0;
    z-index: 1;
    pointer-events: none;
}

/* Page Shading (Creates realistic 3D paper curve illumination) */
.catalog-page::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.12) 0%, rgba(0, 0, 0, 0.01) 6%, rgba(0, 0, 0, 0) 15%, rgba(0, 0, 0, 0) 90%, rgba(0, 0, 0, 0.06) 100%);
    pointer-events: none;
    z-index: 20;
}

/* Virtual Spine effect */
.catalog-page::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 6px;
    height: 100%;
    background: linear-gradient(to right, rgba(0, 0, 0, 0.35), rgba(0, 0, 0, 0));
    z-index: 21;
}

/* Canvas/Image sizing */
.catalog-page canvas,
.catalog-page img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Interactive Zoom Control */
.catalog-zoomable {
    cursor: zoom-in;
    transition: transform 0.4s cubic-bezier(0.25, 1, 0.5, 1);
}

.catalog-zoomable.zoomed {
    cursor: zoom-out;
    transform: scale(2.0) !important;
    z-index: 100 !important;
    box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.95);
    transform-origin: center center;
}

#catalog-viewer.zoomed-mode .catalog-page.active {
    overflow: auto;
}

/* Fullscreen Mode override */
.viewer-fullscreen-active {
    position: fixed !important;
    inset: 0 !important;
    z-index: 9999 !important;
    background-color: #070a13 !important;
    padding: 24px !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
}

.viewer-fullscreen-active #catalog-viewer {
    width: 100% !important;
    height: 80vh !important;
}