body {
    margin: 0;
    background: #111;
    font-family: Arial, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
	overflow: hidden;
}

.book {
    width: 100vw;
	height: 100vh;
    max-width: 1800px;   
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
	overflow: visible;
}

.spread {
    display: none;
    width: 100%;
    height: 100%;
    justify-content: center;
    align-items: center;
}

.spread.active {
    display: flex;
}

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

.cover .page {
    /* width: 50%; */
}

.cover {
    justify-content: flex-start;
}

.pageholder {
    position: relative;
    width: 48%;
    height: 100%;
    overflow: hidden;
}

.placeholder {
    width: 48%;
    height: 100%;
}


#flipbook {
    position: absolute;
}

#flipbook .page {
    background: #111;
    overflow: hidden;
}

#flipbook .page .page-inner {
    position: relative;
    width: 100%;
    height: 100%;
}

#flipbook .page img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: fill;
}

#zoom-container {
    width: 100%;
    height: 100%;
    position: relative;
    cursor: zoom-in;
}

#zoom-container.zoomed {
    cursor: move;
}

.zoom-close {
    position: fixed;
    top: 10px;
    right: 10px;
    background: rgba(0,0,0,0.7);
    color: #fff;
    padding: 8px 12px;
    cursor: pointer;
    z-index: 3000;
    display: none;
}

#zoom-container.zoomed .zoom-close,
#zoom-container.zoomed .zoom-close {
    display: block;
}

.innershadow {
    position: absolute;
    top: 0;
    width: 6%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
}

.pleft .innershadow {
    right: 0;
    background: linear-gradient(
        to left,
        rgba(0,0,0,0.25),
        rgba(0,0,0,0)
    );
}

.pright .innershadow {
    left: 0;
    background: linear-gradient(
        to right,
        rgba(0,0,0,0.25),
        rgba(0,0,0,0)
    );
}

.nav {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;

    width: 80px;
    height: 80px;

    border-radius: 50%;
    border: none;

    background: rgba(0, 0, 0, 0.85);
    color: #fff;

    font-size: 32px;
    line-height: 80px;
    text-align: center;

    cursor: pointer;

    transition: all 0.2s ease;
}

/* LEFT / RIGHT POSITIONING */
.prev {
    left: -40px; /* pushes half off screen like your example */
	padding-left: 36px;
}

.next {
    right: -40px;
	padding-right: 36px;
}

/* HOVER EFFECT */
.nav:hover {
    background: rgba(255, 255, 255, 0.9);
    color: #000;
}

/* OPTIONAL: subtle scale on hover */
.nav:hover {
    transform: translateY(-50%) scale(1.05);
}



.link-overlay {
    position: absolute;
    display: block;
    z-index: 20;
    background: rgba(255, 255, 255, 0);
    cursor: pointer;
}

/* optional for debugging */
.link-overlay:hover {
    background: rgba(0, 128, 255, 0.18);
    outline: 1px solid rgba(0, 128, 255, 0.45);
}


.page-inner {
    position: relative;
    width: 100%;
    height: 100%;
}

/* SHADOW BASE */
.inner-shadow {
    position: absolute;
    top: 0;
    width: 6%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

/* LEFT PAGE (shadow on right edge) */
.page.even .inner-shadow.left {
    right: 0;
    background: linear-gradient(
        to left,
        rgba(0,0,0,0.25),
        rgba(0,0,0,0)
    );
}

/* RIGHT PAGE (shadow on left edge) */
.page.odd .inner-shadow.right {
    left: 0;
    background: linear-gradient(
        to right,
        rgba(0,0,0,0.25),
        rgba(0,0,0,0)
    );
}

/* OPTIONAL: hide unused shadow sides */
.inner-shadow.left { display: none; }
.inner-shadow.right { display: none; }

.page.even .inner-shadow.left { display: block; }
.page.odd .inner-shadow.right { display: block; }


/* TOGGLE TAB */
.thumb-toggle {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background: #000;
    color: #fff;
    padding: 6px 26px 6px 26px;
    cursor: pointer;
    z-index: 2000;
    border-radius: 6px 6px 0 0;
}

/* BAR CONTAINER */
.thumb-bar {
    position: fixed;
    bottom: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: rgba(0,0,0,0.9);
    display: flex;
    align-items: center;
    transition: bottom 0.3s ease;
    z-index: 1500;
}

/* SHOW ON HOVER */
.thumb-bar.active {
    bottom: 0;
}

/* VIEWPORT */
.thumb-viewport {
    overflow: hidden;
    flex: 1;
}

/* TRACK (scroll container) */
.thumb-track {
    display: flex;
    transition: transform 0.3s ease;
}

/* THUMB */
.thumb {
    width: 75px;
    flex-shrink: 0;
    margin: 0 5px;
    cursor: pointer;
}

.thumb img {
    width: 100%;
    height: auto;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.thumb:hover img {
    opacity: 1;
}

/* NAV BUTTONS */
.thumb-nav {
    width: 40px;
    height: 100%;
    background: rgba(0,0,0,0.6);
    color: #fff;
    border: none;
    cursor: pointer;
}


/* TOP TOGGLE BUTTON */
.archive-toggle {
    position: fixed;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    background: #000;
    color: #fff;
    padding: 6px 12px;
    cursor: pointer;
    z-index: 2000;
    border-radius: 0 0 6px 6px;
    font-size: 14px;
}

/* DROPDOWN MENU */
.archive-menu {
    position: fixed;
    top: -120px;
    left: 0;
    width: 100%;
    height: 120px;
    background: rgba(0,0,0,0.9);
    transition: top 0.3s ease;
    z-index: 1500;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ACTIVE STATE */
.archive-menu.active {
    top: 0;
}

/* CONTENT */
.archive-content {
    color: #fff;
    font-size: 18px;
	cursor: pointer;
}

/* MODAL BACKDROP */
.archive-modal {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

/* SHOW MODAL */
.archive-modal.active {
    display: flex;
}

/* MODAL BOX */
.archive-modal-content {
    width: 80%;
    max-width: 1000px;
    height: 80%;
    background: #f5f5f5;
    border-radius: 6px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* HEADER */
.archive-header {
    background: #ddd;
    padding: 12px 16px;
    font-weight: bold;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* CLOSE BUTTON */
.archive-close {
    background: none;
    border: none;
    font-size: 22px;
    cursor: pointer;
}

/* BODY */
.archive-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.archive-title {
    text-align: center;
    font-size: 22px;
    margin-bottom: 10px;
}

.archive-subtitle {
    text-align: center;
    color: #666;
    margin-bottom: 20px;
}

.archive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 20px;
}

.archive-item {
    text-align: center;
    cursor: pointer;
}

.archive-item img {
    width: 100%;
    height: auto;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    transition: transform 0.2s ease;
}

.archive-item:hover img {
    transform: scale(1.05);
}

.archive-item-title {
    margin-top: 8px;
    font-size: 14px;
}