/* ══════════════════════════════════════════════════════════════
   LIBRARY.CSS — The Field Library (monochrome bookshelf)
   Scope: .library, .library-overlay, .library-lightbox only.
   Black panel · paper spines · typographic bookends · leaf-model
   book overlay with pointer-drag page turn + image lightbox.
══════════════════════════════════════════════════════════════════ */

/* ── Section header (lives on the blue section above the panel) ── */
.library-header {
    position: relative;
    z-index: 2;
    padding: 72px 56px 28px;
    color: #fff;
}
.library-eyebrow {
    color: rgba(255,255,255,0.45);
    font-size: 10px;
    letter-spacing: 0.18em;
    margin-bottom: 10px;
}
.library-title {
    font-family: var(--font-display);
    font-size: clamp(48px, 8vw, 128px);
    color: #fff;
    line-height: 0.88;
    letter-spacing: 0.01em;
    margin: 0;
}
.library-meta {
    color: rgba(255,255,255,0.55);
    font-size: 10px;
    letter-spacing: 0.14em;
    margin-top: 14px;
}

/* ══════════════════════════════════════════════════════════════
   THE PANEL — now pure ink
══════════════════════════════════════════════════════════════════ */
.library {
    position: relative;
    z-index: 2;
    margin: 0 56px 40px;
    background: var(--bg-ink);
    color: var(--bg-paper);
    padding: 56px 44px 48px;
    border-radius: 2px;
    box-shadow:
        0 2px 0 rgba(0,0,0,0.3),
        0 24px 56px rgba(0,0,0,0.45);
    overflow: hidden;
}

/* Corner brackets in paper tone */
.library .cb {
    border-color: rgba(236,234,227,0.25);
}
.library .corner-brackets {
    inset: 14px;
    z-index: 1;
    pointer-events: none;
}

/* Scattered margin numerals, paper 25% */
.library-margin-numerals {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
    font-family: var(--font-mono);
    font-size: 9px;
    color: rgba(236,234,227,0.25);
    letter-spacing: 0.14em;
}
.library-margin-numerals span { position: absolute; }

/* ══════════════════════════════════════════════════════════════
   SHELVES
══════════════════════════════════════════════════════════════════ */
.library-shelves {
    position: relative;
    z-index: 2;
    max-width: 1240px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 56px;
}

.library-shelf {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: stretch;
}

/* The books row: --row is the per-row cell height; books scale from it */
.library-shelf-books {
    --row: clamp(300px, 32vw, 420px);
    position: relative;
    display: flex;
    align-items: flex-end;
    gap: 6px;
    width: 100%;
    height: var(--row);
    padding: 0 4px;
}

/* Thin ink line */
.library-shelf-line {
    position: relative;
    width: 100%;
    height: 2px;
    background: var(--bg-paper);
    margin: 0;
}

/* ── Typographic bookend (right-aligned, hugs the shelf line) ── */
.library-shelf-label-big {
    flex: 1 1 auto;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    justify-content: flex-end;
    align-self: flex-end;
    min-width: 0;
    padding: 0 12px 0 20px;
    pointer-events: none;
    overflow: hidden;
}
.library-shelf-label-big .lsl-range {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: var(--bg-paper);
    opacity: 0.6;
    text-transform: uppercase;
    margin-bottom: 2px;
}
.library-shelf-label-big .lsl-big {
    font-family: var(--font-display);
    font-size: clamp(80px, 18vw, 240px);
    line-height: 0.78;
    letter-spacing: -0.02em;
    text-transform: uppercase;
    color: transparent;
    -webkit-text-stroke: 1px var(--bg-paper);
    opacity: 0.18;
    white-space: nowrap;
    display: block;
}

/* North-arrow bookend on shelf 01 */
.library-bookend {
    width: 26px;
    height: 46px;
    flex-shrink: 0;
    margin-left: 10px;
    align-self: flex-end;
    opacity: 0.7;
    pointer-events: none;
}
.library-bookend svg { width: 100%; height: 100%; display: block; }
.library-bookend svg path,
.library-bookend svg polygon { fill: var(--bg-paper); }

/* ══════════════════════════════════════════════════════════════
   BOOKS — monochrome spines
══════════════════════════════════════════════════════════════════ */
.library-book {
    --book-w: 60;
    --book-hp: 0.8;
    --book-rot: 0;
    position: relative;
    flex-shrink: 0;
    cursor: pointer;
    background: transparent;
    padding: 0;
    outline: none;
    transform-style: preserve-3d;
    will-change: transform;
    height: calc(var(--row, 420px) * var(--book-hp));
    width: calc(var(--book-w) / 420 * var(--row, 420px));
    transform: rotate(calc(var(--book-rot) * 1deg));
    transform-origin: bottom right;
}
/* Negative lean uses bottom-left pivot so the base stays on the shelf */
.library-book[data-rot-sign="neg"] { transform-origin: bottom left; }

.library-book:focus-visible .library-spine {
    box-shadow:
        inset 1px 0 0 rgba(11,14,20,0.15),
        0 0 0 2px var(--accent-2);
}

.library-spine {
    position: relative;
    width: 100%;
    height: 100%;
    border-radius: 1px;
    overflow: hidden;
    display: block;
    background: linear-gradient(180deg, #ECEAE3 0%, #E2DFD6 100%);
    color: var(--bg-ink);
    box-shadow:
        inset 1px 0 0 rgba(11,14,20,0.15),
        0 2px 4px rgba(0,0,0,0.4);
}

/* Inverted (ink) spines: Black Sky Sentinel, SIGMA, SVHN */
.library-book[data-ink="true"] .library-spine {
    background: linear-gradient(180deg, #0B0E14 0%, #141822 100%);
    color: var(--bg-paper);
    box-shadow:
        inset 1px 0 0 rgba(236,234,227,0.15),
        inset 0 0 0 1px rgba(236,234,227,0.9),
        0 2px 4px rgba(0,0,0,0.5);
}

/* ── Spine inner elements ── */
.library-spine-inner {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 10px 3px;
}

/* Vol label at the top */
.library-spine .lsp-vol {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.16em;
    text-align: center;
    text-transform: uppercase;
    white-space: nowrap;
    writing-mode: horizontal-tb;
    opacity: 0.85;
    display: block;
    padding: 0 2px;
}
.library-spine .lsp-vol.big {
    font-family: var(--font-display);
    font-size: 11px;
    letter-spacing: 0.14em;
    opacity: 1;
}

/* Vertical title (default) */
.library-spine .lsp-title {
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    white-space: nowrap;
    text-align: center;
    overflow: hidden;
    max-height: 78%;
    text-overflow: ellipsis;
    letter-spacing: 0.08em;
    padding: 0 2px;
}
.library-spine .lsp-title[data-font="display"] {
    font-family: var(--font-display);
    text-transform: uppercase;
    font-size: 14px;
    letter-spacing: 0.06em;
}
.library-spine .lsp-title[data-font="mono"] {
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 10px;
    letter-spacing: 0.18em;
}
.library-spine .lsp-title[data-font="smallcaps"] {
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 9px;
    letter-spacing: 0.22em;
}
.library-spine .lsp-title[data-font="caveat"] {
    font-family: var(--font-hand);
    font-weight: 600;
    font-size: 22px;
    letter-spacing: 0.02em;
}
.library-spine .lsp-sub {
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    opacity: 0.72;
    writing-mode: horizontal-tb;
    text-align: center;
    padding: 0 2px;
    line-height: 1.2;
}

/* Accents inside spines */
.library-spine .lsp-wave {
    position: absolute;
    top: 22px;
    left: 10%;
    right: 10%;
    height: 10px;
    pointer-events: none;
}
.library-spine .lsp-wave svg { width: 100%; height: 100%; display: block; }

.library-spine .lsp-river {
    position: absolute;
    top: 4px;
    bottom: 4px;
    left: 50%;
    width: 10px;
    margin-left: -5px;
    pointer-events: none;
}
.library-spine .lsp-river svg { width: 100%; height: 100%; display: block; }

.library-spine .lsp-dot {
    position: absolute;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent-2);
    top: 24px;
    left: 50%;
    transform: translateX(-50%);
}

/* Solid horizontal band (Black Sky Sentinel / Wildfire) */
.library-spine .lsp-band {
    position: absolute;
    left: 0;
    right: 0;
    height: 14px;
    bottom: 36px;
}
.library-book[data-ink="true"] .lsp-band { background: var(--bg-paper); }
.library-book:not([data-ink="true"]) .lsp-band { background: var(--bg-ink); }

/* Double horizontal rules (Kalba) */
.library-spine .lsp-rules-h {
    position: absolute;
    left: 10%;
    right: 10%;
    bottom: 22px;
    height: 5px;
    border-top: 1px solid currentColor;
    border-bottom: 1px solid currentColor;
}

/* Double vertical rules both edges (UHI Pakistan) */
.library-spine .lsp-rules-v::before,
.library-spine .lsp-rules-v::after {
    content: '';
    position: absolute;
    top: 6%;
    bottom: 6%;
    width: 3px;
    border-left: 1px solid currentColor;
    border-right: 1px solid currentColor;
}
.library-spine .lsp-rules-v::before { left: 4px; }
.library-spine .lsp-rules-v::after  { right: 4px; }

/* Small IoU circle (Footprint) */
.library-spine .lsp-circle {
    position: absolute;
    top: 36px;
    left: 50%;
    transform: translateX(-50%);
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid currentColor;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.08em;
}

/* Big sigma glyph (SIGMA book) */
.library-spine .lsp-sigma {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-display);
    font-size: clamp(60px, 9vw, 110px);
    line-height: 1;
    pointer-events: none;
}

/* Strike-through mono (flood-encroachment "PAUSED") */
.library-spine .lsp-strike {
    text-decoration: line-through;
    text-decoration-thickness: 1px;
    opacity: 0.8;
}

/* Caveat tagline below Anton title (Kalba) */
.library-spine .lsp-caveat {
    font-family: var(--font-hand);
    font-size: 15px;
    writing-mode: vertical-rl;
    transform: rotate(180deg);
    text-align: center;
    opacity: 0.85;
    white-space: nowrap;
    padding: 0 2px;
}

/* ══════════════════════════════════════════════════════════════
   SHELF HOVER — lift, tilt, dim siblings
══════════════════════════════════════════════════════════════════ */
.library-shelf-books.is-hovering .library-book:not(.is-hover) {
    opacity: 0.5;
}
.library-book.is-hover {
    z-index: 10;
}

/* ══════════════════════════════════════════════════════════════
   COVER CARD (desktop hover only, monochrome)
══════════════════════════════════════════════════════════════════ */
.library-cover-card {
    position: absolute;
    width: 260px;
    background: var(--bg-paper);
    color: var(--bg-ink);
    border: 1.5px solid var(--bg-ink);
    box-shadow: 0 24px 40px rgba(0,0,0,0.5);
    padding: 16px;
    pointer-events: none;
    z-index: 50;
    opacity: 0;
    transform: translateY(10px);
}
.library-cover-card .lcc-head {
    display: flex; align-items: baseline; justify-content: space-between;
    margin-bottom: 10px;
}
.library-cover-card .lcc-vol {
    font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em; opacity: 0.6;
}
.library-cover-card .lcc-year {
    font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.14em; opacity: 0.6;
}
.library-cover-card .lcc-thumb {
    width: 100%;
    aspect-ratio: 3 / 2;
    background: var(--bg-ink);
    margin: 0 0 10px;
    overflow: hidden;
}
.library-cover-card .lcc-thumb img {
    width: 100%; height: 100%; object-fit: cover; display: block;
    filter: grayscale(1);
}
.library-cover-card .lcc-title {
    font-family: var(--font-display); text-transform: uppercase;
    font-size: 22px; line-height: 0.98; letter-spacing: 0.01em;
    margin: 0 0 6px;
}
.library-cover-card .lcc-tag {
    font-family: var(--font-body); font-size: 12px; line-height: 1.3; opacity: 0.82;
    margin-bottom: 12px;
}
.library-cover-card .lcc-chips {
    display: flex; flex-wrap: wrap; gap: 4px 6px; margin-bottom: 12px;
}
.library-cover-card .lcc-chip {
    font-family: var(--font-mono); font-size: 8px; letter-spacing: 0.12em;
    padding: 3px 6px; border: 1px solid rgba(11,14,20,0.3);
    text-transform: uppercase;
}
.library-cover-card .lcc-foot {
    display: flex; justify-content: space-between; align-items: flex-end;
}
.library-cover-card .lcc-stamp {
    display: inline-block;
    font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.18em;
    border: 1.5px solid currentColor;
    padding: 3px 8px;
    transform: rotate(-6deg);
    opacity: 0.78;
    text-transform: uppercase;
}
.library-cover-card .lcc-open {
    font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.18em; text-transform: uppercase;
    color: var(--bg-ink);
}

/* ══════════════════════════════════════════════════════════════
   OPEN BOOK OVERLAY — leaf model
══════════════════════════════════════════════════════════════════ */
.library-overlay {
    position: fixed;
    inset: 0;
    z-index: 10000;
    background: rgba(11,14,20,0.94);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    opacity: 0;
    pointer-events: none;
    overflow: hidden;
}
.library-overlay.is-open {
    opacity: 1;
    pointer-events: auto;
}

.library-overlay::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(236,234,227,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(236,234,227,0.06) 1px, transparent 1px);
    background-size: 44px 44px;
    opacity: 0.5;
    pointer-events: none;
}

.library-overlay-head {
    position: relative;
    text-align: center;
    color: #fff;
    margin-bottom: 20px;
    z-index: 2;
    pointer-events: none;
}
.library-overlay-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 4vw, 48px);
    line-height: 1;
    letter-spacing: 0.01em;
    margin: 0 0 6px;
    text-transform: uppercase;
}
.library-overlay-sub {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.55);
}
.library-overlay-loading {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.6);
    margin-top: 6px;
    opacity: 0;
}
.library-overlay-loading.is-visible { opacity: 1; }

.library-overlay-close {
    position: absolute;
    top: 20px; right: 24px;
    width: 44px; height: 44px;
    border-radius: 50%;
    border: 1.5px solid rgba(255,255,255,0.4);
    background: transparent;
    color: #fff;
    font-size: 20px;
    cursor: pointer;
    z-index: 3;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.library-overlay-close:hover {
    background: #fff;
    color: var(--bg-ink);
    border-color: #fff;
}

/* ── 3D stage ── */
.library-stage {
    position: relative;
    width: min(1100px, 94vw);
    height: min(640px, 70vh);
    perspective: 2000px;
    z-index: 2;
}

.library-book3d {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
    transform: rotateX(6deg);
    touch-action: none;
    /* Soft outer shadow so the book "floats" above the backdrop */
    filter: drop-shadow(0 24px 48px rgba(0,0,0,0.55));
}

/* Static page bases: left + right halves. Grid pattern only on statics
   (not on flipping leaf faces) to keep the turn cheap to repaint. */
.library-cover {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background: var(--bg-paper);
    color: var(--bg-ink);
    overflow: hidden;
    padding: 36px 40px;
    box-sizing: border-box;
    background-image:
        linear-gradient(rgba(11,14,20,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(11,14,20,0.06) 1px, transparent 1px);
    background-size: 28px 28px;
    box-shadow: inset 0 0 24px rgba(0,0,0,0.08);
}
/* The leaf is 50% of book3d (one half). Its faces fill the leaf (100%). */
.library-leaf {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    overflow: visible;         /* so the back-face can rotate out */
    box-sizing: border-box;
}
.library-leaf-face {
    background: var(--bg-paper);
    color: var(--bg-ink);
    overflow: hidden;
    padding: 36px 40px;
    box-sizing: border-box;
    box-shadow: inset 0 0 24px rgba(0,0,0,0.08);
}

.library-cover.left  { left: 0;  border-right: 1px solid rgba(0,0,0,0.08); }
.library-cover.right { right: 0; border-left:  1px solid rgba(0,0,0,0.08); }

/* Inner gutter shadow */
.library-cover.left::after,
.library-cover.right::after {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    width: 24px;
    pointer-events: none;
}
.library-cover.left::after {
    right: 0;
    background: linear-gradient(90deg, transparent 0%, rgba(0,0,0,0.18) 100%);
}
.library-cover.right::after {
    left: 0;
    background: linear-gradient(270deg, transparent 0%, rgba(0,0,0,0.18) 100%);
}

/* ── The leaf (single page that flips) ── */
.library-leaf {
    right: 0;
    transform-origin: left center;
    transform-style: preserve-3d;
    z-index: 3;
    padding: 0;
    background: transparent;
    background-image: none;
    box-shadow: none;
}
.library-leaf-face {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
}
.library-leaf-face.back {
    transform: rotateY(180deg);
}

/* Shadow overlay inside the leaf — animated via GSAP.
   Stronger gradient so the fold reads as a real page shadow. */
.library-leaf-shadow {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        linear-gradient(90deg,
            rgba(0,0,0,0.55) 0%,
            rgba(0,0,0,0.25) 40%,
            rgba(0,0,0,0.0)  85%);
    opacity: 0;
    z-index: 2;
}

/* ── Page-stack thickness (visible depth on both sides of the book) ── */
.library-edge-stack {
    position: absolute;
    top: 1%;
    bottom: 1%;
    width: 12px;
    pointer-events: none;
    z-index: 0;
    background:
        repeating-linear-gradient(90deg,
            #ECEAE3 0px,
            #DAD6CA 1px,
            #ECEAE3 2px,
            #CDC8BB 3px);
    box-shadow:
        0 10px 24px rgba(0,0,0,0.45),
        inset 0 0 0 1px rgba(0,0,0,0.12);
}
.library-edge-stack.left  { left:  -11px; transform: skewY(1.2deg); }
.library-edge-stack.right { right: -11px; transform: skewY(-1.2deg); }

/* ── Spine binding in the gutter ── */
.library-spine-binding {
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    width: 10px;
    transform: translateX(-50%);
    pointer-events: none;
    z-index: 4;
    background:
        linear-gradient(90deg,
            rgba(0,0,0,0.35) 0%,
            rgba(0,0,0,0.0)  40%,
            rgba(0,0,0,0.0)  60%,
            rgba(0,0,0,0.35) 100%);
}

/* ── Hardcover: closed book cover shown on open, flips to reveal pages ── */
.library-hardcover {
    position: absolute;
    top: 0; right: 0;
    width: 50%;
    height: 100%;
    transform-origin: left center;
    transform-style: preserve-3d;
    z-index: 5;
    visibility: hidden;
    opacity: 0;
}
.library-hc-face {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    padding: 56px 44px;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.library-hc-face.front {
    background:
        linear-gradient(135deg, #141822 0%, #0B0E14 100%);
    color: var(--bg-paper);
    box-shadow:
        inset 2px 0 0 rgba(236,234,227,0.08),
        inset -1px 0 0 rgba(0,0,0,0.4),
        0 12px 30px rgba(0,0,0,0.6);
    border-right: 1px solid rgba(0,0,0,0.6);
}
.library-hc-face.back {
    transform: rotateY(180deg);
    background:
        linear-gradient(135deg, #0B0E14 0%, #141822 100%);
    color: var(--bg-paper);
    box-shadow: inset 1px 0 0 rgba(236,234,227,0.08);
}
.library-hc-eyebrow {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.24em;
    opacity: 0.6;
    text-transform: uppercase;
}
.library-hc-title {
    font-family: var(--font-display);
    font-size: clamp(28px, 3.4vw, 48px);
    line-height: 0.98;
    letter-spacing: 0.01em;
    text-transform: uppercase;
    margin: 0;
    color: var(--bg-paper);
}
.library-hc-rule {
    width: 48px;
    height: 2px;
    background: var(--accent-2);
    margin: 14px 0;
}
.library-hc-sub {
    font-family: var(--font-body);
    font-size: 13px;
    line-height: 1.4;
    opacity: 0.78;
}
.library-hc-foot {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    opacity: 0.7;
}

/* ── Tap-pulse feedback (brief ring on the clicked half) ── */
.library-tap-pulse {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 180px;
    height: 180px;
    margin-left: -90px;
    margin-top: -90px;
    border-radius: 50%;
    border: 2px solid rgba(31,111,235,0.55);
    pointer-events: none;
    opacity: 0;
    transform: scale(0.6);
    z-index: 6;
}

/* ── Page content ── */
.library-overlay .library-section-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.library-overlay .page-title {
    font-family: var(--font-display);
    text-transform: uppercase;
    font-size: 36px;
    line-height: 0.98;
    letter-spacing: 0.01em;
    margin-bottom: 8px;
}
.library-overlay .page-sub {
    font-family: var(--font-body);
    font-size: 13px;
    line-height: 1.35;
    color: var(--text-muted);
    margin-bottom: 18px;
}
.library-overlay .page-meta {
    display: flex; gap: 16px; flex-wrap: wrap;
    font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.16em; text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 16px;
}
.library-overlay .page-meta b { color: var(--bg-ink); font-weight: 500; margin-left: 6px; }

.library-overlay .library-stamp {
    display: inline-block;
    font-family: var(--font-mono); font-size: 11px; letter-spacing: 0.2em;
    border: 2px solid currentColor;
    padding: 4px 10px;
    transform: rotate(-6deg);
    color: var(--bg-ink);
    text-transform: uppercase;
    margin-top: 10px;
}

/* Taped figures */
.library-overlay .library-figure {
    position: relative;
    display: inline-block;
    margin: 14px 0;
    transform: rotate(-2deg);
    cursor: zoom-in;
}
.library-overlay .library-figure img,
.library-overlay .library-figure svg {
    display: block;
    max-width: 100%;
    max-height: 220px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.15);
    /* Full colour inside the opened book. Grayscale is kept only on the
       hover cover-card thumbnail, intentionally. */
    pointer-events: auto;
}

/* ── Multi-image gallery (books like Building Footprint Benchmark) ── */
.library-overlay .library-gallery-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 14px 0 10px;
}
.library-overlay .library-gallery-tile {
    position: relative;
    margin: 0;
    overflow: hidden;
    box-shadow: 0 6px 14px rgba(0,0,0,0.18);
    cursor: zoom-in;
}
.library-overlay .library-gallery-tile img {
    display: block;
    width: 100%;
    height: 110px;
    object-fit: cover;
    pointer-events: auto;
}
.library-overlay .library-gallery-tile figcaption {
    position: absolute;
    left: 0; right: 0; bottom: 0;
    padding: 6px 8px;
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--bg-paper);
    background: linear-gradient(0deg, rgba(11,14,20,0.85) 0%, rgba(11,14,20,0) 100%);
}
.library-overlay .library-gallery-tile .lgt-score {
    font-family: var(--font-display);
    font-size: 13px;
    letter-spacing: 0;
    text-transform: none;
}

.library-overlay .library-gallery-charts {
    display: flex;
    gap: 8px;
    margin-top: 10px;
}
.library-overlay .library-gallery-chart {
    margin: 0;
    flex: 1 1 0;
    min-width: 0;
    cursor: zoom-in;
}
.library-overlay .library-gallery-chart img {
    display: block;
    width: 100%;
    max-height: 130px;
    object-fit: contain;
    background: var(--bg-paper);
    pointer-events: auto;
}
.library-overlay .library-gallery-chart figcaption {
    font-family: var(--font-mono);
    font-size: 8px;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    margin-top: 4px;
    line-height: 1.3;
    text-transform: uppercase;
}
.library-overlay .library-figure::before,
.library-overlay .library-figure::after {
    content: '';
    position: absolute;
    width: 44px; height: 14px;
    background: rgba(11,14,20,0.14);
    top: -6px;
    pointer-events: none;
}
.library-overlay .library-figure::before { left: -8px; transform: rotate(-8deg); }
.library-overlay .library-figure::after  { right: -8px; transform: rotate(6deg); }
.library-overlay .library-figure figcaption {
    font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.14em;
    color: var(--text-muted); margin-top: 6px; text-transform: uppercase;
}

/* Handwritten margin note */
.library-overlay .library-margin-note {
    font-family: var(--font-hand);
    font-size: 22px;
    color: var(--bg-ink);
    line-height: 1;
    position: relative;
    display: inline-block;
    margin-top: 10px;
    padding-left: 28px;
    opacity: 0.78;
}
.library-overlay .library-margin-note::before {
    content: '';
    position: absolute;
    left: 0; top: 50%;
    width: 22px; height: 10px;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 22 10' fill='none' stroke='%230B0E14' stroke-width='1.5' stroke-linecap='round'><path d='M1 5 Q 10 1 20 5 M 16 2 L 20 5 L 16 8'/></svg>");
    background-repeat: no-repeat;
    transform: translateY(-50%);
    pointer-events: none;
}

/* Pipeline */
.library-overlay .library-pipeline {
    list-style: none;
    margin: 0;
    padding-left: 22px;
    position: relative;
    counter-reset: step;
}
.library-overlay .library-pipeline::before {
    content: '';
    position: absolute;
    left: 7px; top: 6px; bottom: 6px;
    width: 1px;
    background: rgba(11,14,20,0.3);
    pointer-events: none;
}
.library-overlay .library-pipeline li {
    position: relative;
    padding: 6px 0 6px 10px;
    font-size: 13px;
    line-height: 1.4;
}
.library-overlay .library-pipeline li::before {
    content: counter(step);
    counter-increment: step;
    position: absolute;
    left: -22px; top: 6px;
    width: 16px; height: 16px;
    border-radius: 50%;
    background: var(--bg-paper);
    border: 1.5px solid var(--bg-ink);
    color: var(--bg-ink);
    font-family: var(--font-mono);
    font-size: 9px;
    text-align: center;
    line-height: 13px;
    letter-spacing: 0;
}

/* Results blocks */
.library-overlay .library-results {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-top: 8px;
}
.library-overlay .library-result {
    display: grid;
    grid-template-columns: 160px 1fr;
    align-items: baseline;
    gap: 12px;
    border-top: 1px solid rgba(11,14,20,0.12);
    padding-top: 8px;
}
.library-overlay .library-result-label {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: 0.14em;
    color: var(--text-muted);
    text-transform: uppercase;
}
.library-overlay .library-result-value {
    font-family: var(--font-display);
    font-size: 20px;
    letter-spacing: 0.01em;
}
.library-overlay .library-result[data-table='true'] {
    grid-template-columns: 100px repeat(3, 1fr);
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.library-overlay .library-result[data-table='true'] span { text-align: left; }

.library-overlay .library-finding {
    font-family: var(--font-body);
    font-size: 12px;
    color: var(--bg-ink);
    opacity: 0.78;
    margin-top: 12px;
    border-top: 1px dashed rgba(11,14,20,0.2);
    padding-top: 10px;
}

/* Chips */
.library-overlay .library-chips {
    display: flex; flex-wrap: wrap; gap: 4px 6px; margin: 6px 0 14px;
}
.library-overlay .library-chips span {
    font-family: var(--font-mono); font-size: 9px; letter-spacing: 0.12em;
    padding: 3px 7px;
    border: 1px solid rgba(11,14,20,0.28);
    text-transform: uppercase;
}

/* Links */
.library-overlay .library-links {
    display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px;
}
.library-overlay .library-links a {
    font-family: var(--font-mono); font-size: 10px; letter-spacing: 0.14em;
    padding: 7px 12px;
    border: 1.5px solid var(--bg-ink);
    text-transform: uppercase;
    color: var(--bg-ink);
    background: transparent;
    transition: background 0.2s, color 0.2s;
}
.library-overlay .library-links a:hover {
    background: var(--bg-ink);
    color: var(--bg-paper);
}

/* ── Controls ── */
.library-controls {
    position: relative;
    display: flex;
    align-items: center;
    gap: 14px;
    margin-top: 24px;
    z-index: 2;
    color: #fff;
}
.library-ctrl {
    display: inline-flex; align-items: center; justify-content: center;
    min-width: 44px; height: 44px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1.5px solid rgba(255,255,255,0.5);
    background: transparent;
    color: #fff;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.library-ctrl:hover {
    background: #fff;
    color: var(--bg-ink);
    border-color: #fff;
}
.library-ctrl:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}
.library-counter {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.72);
    min-width: 70px;
    text-align: center;
}

/* ══════════════════════════════════════════════════════════════
   LIGHTBOX (image zoom)
══════════════════════════════════════════════════════════════════ */
.library-lightbox {
    position: fixed;
    inset: 0;
    z-index: 10001;
    background: rgba(11,14,20,0.96);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: zoom-out;
    opacity: 0;
    pointer-events: none;
}
.library-lightbox.is-open {
    opacity: 1;
    pointer-events: auto;
}
.library-lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    display: block;
    box-shadow: 0 24px 60px rgba(0,0,0,0.6);
}

/* ══════════════════════════════════════════════════════════════
   REDUCED MOTION — flat, crossfade only
══════════════════════════════════════════════════════════════════ */
@media (prefers-reduced-motion: reduce) {
    .library-book3d { transform: none !important; }
    .library-leaf { display: none !important; }
    .library-cover { transition: opacity 0.3s ease; }
    .library-cover.is-fading { opacity: 0; }
}

/* ══════════════════════════════════════════════════════════════
   MOBILE / NARROW VIEWPORT (< 768px)
══════════════════════════════════════════════════════════════════ */
@media (max-width: 768px) {
    .library-header { padding: 48px 20px 20px; }
    .library { margin: 0 16px 32px; padding: 28px 10px 22px; }

    .library-shelves { gap: 36px; }

    .library-shelf-books {
        --row: clamp(220px, 56vw, 300px);
        overflow-x: auto;
        overflow-y: visible;
        scroll-snap-type: x mandatory;
        -webkit-overflow-scrolling: touch;
        padding: 0 10px 10px;
    }
    .library-shelf-books > .library-book { scroll-snap-align: start; }

    /* Move big label above the row on mobile */
    .library-shelf {
        display: flex;
        flex-direction: column;
    }
    .library-shelf-label-big {
        order: -1;
        align-items: flex-start;
        padding: 0 10px 4px;
        margin-bottom: 4px;
    }
    .library-shelf-label-big .lsl-big {
        font-size: clamp(48px, 14vw, 96px);
    }
    .library-shelf-label-big .lsl-range {
        font-size: 9px;
    }

    .library-bookend { display: none; }

    .library-cover-card { display: none; }

    /* Mobile: one page at a time, crossfade, no 3D */
    .library-stage {
        width: 92vw;
        height: 72vh;
        perspective: none;
    }
    .library-book3d { transform: none; }
    .library-leaf { display: none !important; }
    .library-cover {
        position: absolute;
        inset: 0;
        width: 100%;
        height: 100%;
        padding: 20px;
        transition: opacity 0.3s ease;
    }
    .library-cover.left  { opacity: 0; }
    .library-cover.right { opacity: 1; }
    .library-cover.is-mobile-visible { opacity: 1; }
    .library-cover.is-mobile-hidden  { opacity: 0; }

    .library-overlay .page-title { font-size: 26px; }
    .library-overlay-close { top: 10px; right: 10px; }
}