/* ════════════════════════════════════════════════════════════════
   CODEX MYTHOLOGICA — MAIN STYLESHEET
   ════════════════════════════════════════════════════════════════ */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { font-size: 16px; -webkit-text-size-adjust: 100%; }

body {
    font-family: 'Cormorant Garamond', 'EB Garamond', Garamond, Georgia, serif;
    color: var(--c-chrome-fg);
    background: var(--c-void);
    overflow: hidden;
    min-height: 100vh;
    min-height: 100dvh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    user-select: none;
}

button { font-family: inherit; cursor: pointer; }
img, svg { max-width: 100%; display: block; }

/* ═══════════════════════ AMBIENT BACKDROP ═══════════════════════ */

.ambient {
    position: fixed; inset: 0;
    background: var(--bg-stage);
    z-index: 0;
    pointer-events: none;
    transition: background var(--d-slow) var(--ease-veil);
}
.ambient__vignette {
    position: absolute; inset: 0;
    background: var(--bg-vignette);
    transition: background var(--d-slow) var(--ease-veil);
}
/* PERF: dropped blur radius from 40px → 20px (composites ~4× faster on most
   GPUs because blur cost is roughly O(r²)). Promoted to its own GPU layer
   via translateZ so the blur is only computed once, not on every parent
   repaint. Animation is gated by [data-perf="rich"] in animations.css. */
.ambient__nebula {
    position: absolute; inset: -10%;
    background:
        radial-gradient(circle at 18% 22%, rgba(201, 161, 74, 0.10), transparent 30%),
        radial-gradient(circle at 82% 78%, rgba(122, 31, 31, 0.08), transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(28, 58, 92, 0.06), transparent 50%);
    filter: blur(20px);
    opacity: 0.7;
    transform: translateZ(0);
    will-change: transform;
    transition: opacity var(--d-slow) var(--ease-veil);
}
[data-theme="parchment"] .ambient__nebula { opacity: 0.35; }

/* PERF: dropped from 8 layered radial-gradients → 4. Removed background-position
   animation (paint-bound on every frame) — replaced by a single transform
   animation in animations.css (compositor-only). */
.ambient__dust {
    position: absolute; inset: 0;
    background-image:
        radial-gradient(1px 1px at 13% 27%, rgba(245, 217, 138, 0.5), transparent 50%),
        radial-gradient(1px 1px at 87% 14%, rgba(245, 217, 138, 0.4), transparent 50%),
        radial-gradient(2px 2px at 64% 38%, rgba(245, 217, 138, 0.25), transparent 50%),
        radial-gradient(1px 1px at 22% 88%, rgba(245, 217, 138, 0.4), transparent 50%);
    background-size: 600px 600px, 700px 700px, 500px 500px, 650px 650px;
    opacity: 0.6;
    transform: translateZ(0);
}
[data-theme="parchment"] .ambient__dust { opacity: 0.25; }

/* ═══════════════════════ LOADER ═══════════════════════ */

.loader {
    position: fixed; inset: 0;
    z-index: 100;
    display: grid; place-items: center;
    background: radial-gradient(ellipse at center, #1a1108 0%, #050302 100%);
    transition: opacity var(--d-slow) var(--ease-veil), visibility var(--d-slow);
}
body:not(.is-loading) .loader {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}
/* PERF: drop-shadow is rebuilt every frame the element transforms.
   Replaced with a static box-shadow on the wrapper (cheap, GPU-cached). */
.loader__sigil {
    width: 140px; height: 140px;
    animation: sigil-rotate 12s linear infinite, sigil-pulse 3s ease-in-out infinite;
}
.loader__rune { animation: sigil-rune-pulse 2.4s ease-in-out infinite; }
.loader__text {
    margin-top: var(--s-6);
    font-family: 'Cinzel', serif;
    font-size: var(--t-sm);
    letter-spacing: 0.4em;
    text-transform: uppercase;
    color: var(--c-gold);
    opacity: 0.8;
    animation: text-flicker 2.4s ease-in-out infinite;
}

/* ═══════════════════════ CHROME (top + bottom) ═══════════════════════ */

/* PERF: backdrop-filter recomputes the blur on every frame, hugely expensive
   especially on mobile. Reduced from 14px → 6px and dropped saturate.
   In perf-lite mode the filter is removed entirely (see overrides below). */
.chrome {
    position: fixed;
    left: 0; right: 0;
    z-index: 30;
    display: flex;
    align-items: center;
    padding: var(--s-3) var(--s-5);
    background: var(--c-chrome-bg);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: var(--c-chrome-fg);
    transition: transform var(--d-medium) var(--ease-veil), opacity var(--d-medium) var(--ease-veil), background var(--d-slow) var(--ease-veil);
    contain: layout style;
}
.chrome--top {
    top: 0;
    border-bottom: 1px solid var(--c-chrome-line);
    justify-content: space-between;
}
.chrome--bottom {
    bottom: 0;
    border-top: 1px solid var(--c-chrome-line);
    gap: var(--s-5);
}
body.is-immersive .chrome--top { transform: translateY(-100%); opacity: 0; }
body.is-immersive .chrome--bottom { transform: translateY(100%); opacity: 0; }

.chrome__brand {
    display: flex; align-items: center; gap: var(--s-3);
    font-family: 'Cinzel', serif;
    letter-spacing: 0.2em;
}
.chrome__monogram {
    width: 32px; height: 32px;
    display: grid; place-items: center;
    border: 1px solid var(--c-gold);
    color: var(--c-gold);
    font-family: 'UnifrakturMaguntia', serif;
    font-size: 1.4rem;
    border-radius: 2px;
    box-shadow: var(--glow-gold), inset 0 0 8px rgba(201, 161, 74, 0.15);
}
.chrome__title {
    font-size: var(--t-sm);
    font-weight: 500;
    text-transform: uppercase;
    color: var(--c-gold-soft);
}
@media (max-width: 680px) {
    .chrome__title { display: none; }
}

.chrome__actions {
    display: flex;
    gap: var(--s-1);
    align-items: center;
}
.chrome__btn {
    width: 40px; height: 40px;
    display: grid; place-items: center;
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    color: var(--c-chrome-fg);
    transition: all var(--d-quick) var(--ease-soft);
}
.chrome__btn:hover {
    border-color: var(--c-gold);
    color: var(--c-gold-bright);
    background: rgba(201, 161, 74, 0.08);
    box-shadow: inset 0 0 12px rgba(201, 161, 74, 0.12);
}
.chrome__btn:active { transform: scale(0.94); }
.chrome__btn[data-active="true"] {
    color: var(--c-gold-bright);
    border-color: var(--c-gold);
    background: rgba(201, 161, 74, 0.12);
}

.chrome__nav {
    display: flex; align-items: center; gap: var(--s-2);
    background: transparent;
    border: 1px solid var(--c-chrome-line);
    color: var(--c-chrome-fg);
    padding: var(--s-2) var(--s-4);
    border-radius: 2px;
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.18em;
    text-transform: uppercase;
    transition: all var(--d-quick) var(--ease-soft);
    min-width: 100px;
    justify-content: center;
}
.chrome__nav:hover {
    border-color: var(--c-gold);
    color: var(--c-gold-bright);
    box-shadow: inset 0 0 12px rgba(201, 161, 74, 0.1);
}
.chrome__nav:disabled {
    opacity: 0.3;
    cursor: not-allowed;
    pointer-events: none;
}
@media (max-width: 580px) {
    .chrome__nav-label { display: none; }
    .chrome__nav { min-width: 44px; padding: var(--s-2) var(--s-3); }
}

.chrome__progress {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--s-1);
    min-width: 0;
}
.chrome__chapter {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--c-gold-soft);
    text-align: center;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.chrome__bar {
    width: min(360px, 50vw);
    height: 2px;
    background: rgba(201, 161, 74, 0.15);
    border-radius: 1px;
    overflow: hidden;
    position: relative;
}
.chrome__bar-fill {
    position: absolute; inset: 0;
    width: 0%;
    background: linear-gradient(90deg, var(--c-gold-deep), var(--c-gold-bright), var(--c-gold));
    transition: width var(--d-medium) var(--ease-soft);
    box-shadow: 0 0 8px rgba(201, 161, 74, 0.6);
}
.chrome__pages {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.16em;
    color: var(--c-chrome-fg-dim);
}
.chrome__sep { margin: 0 var(--s-1); opacity: 0.5; }

/* ═══════════════════════ STAGE + BOOK ═══════════════════════ */

.stage {
    position: relative;
    z-index: 1;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    display: grid;
    place-items: center;
    padding: 80px var(--s-5) 90px;
    perspective: 2400px;
    overflow: hidden;
}

/* PERF: removed the 20px blur filter. The radial-gradient itself already
   produces a soft falloff, so the additional blur was just paint cost. */
.stage__pedestal {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translate3d(-50%, 0, 0);
    width: min(900px, 90vw);
    height: 60px;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.55) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.book {
    position: relative;
    width: min(1100px, 96vw);
    height: min(720px, calc(100dvh - 200px));
    aspect-ratio: 1100 / 720;
    transform-style: preserve-3d;
    transform: rotateX(2deg);
    transition: transform var(--d-slow) var(--ease-soft);
    outline: none;
}
.book:focus-visible {
    box-shadow: 0 0 0 2px var(--c-gold), var(--shadow-book);
    border-radius: 4px;
}
@media (max-width: 760px) {
    .book {
        aspect-ratio: 9 / 14;
        max-height: calc(100dvh - 180px);
    }
}

.book__shadow {
    position: absolute;
    inset: -20px -20px -10px -20px;
    background: var(--shadow-book);
    box-shadow: var(--shadow-book);
    border-radius: 4px;
    pointer-events: none;
    z-index: -1;
}

.book__pages {
    position: relative;
    width: 100%;
    height: 100%;
    transform-style: preserve-3d;
}

/* ═══════════════════════ EDGE TURN ZONES ═══════════════════════ */

.book__edge {
    position: absolute;
    top: 0;
    bottom: 0;
    width: 14%;
    z-index: 100;
    background: transparent;
    border: none;
    color: transparent;
    cursor: pointer;
    transition: background var(--d-medium) var(--ease-soft);
    display: grid;
    place-items: center;
}
.book__edge--left { left: 0; }
.book__edge--right { right: 0; }
.book__edge:hover {
    background: linear-gradient(to right, rgba(201, 161, 74, 0.06), transparent);
}
.book__edge--right:hover {
    background: linear-gradient(to left, rgba(201, 161, 74, 0.06), transparent);
}
.book__edge:hover .book__edge-arrow {
    color: var(--c-gold);
    opacity: 0.8;
    transform: scale(1.3);
}
.book__edge-arrow {
    font-family: serif;
    font-size: 4rem;
    color: var(--c-gold);
    opacity: 0;
    transition: all var(--d-medium) var(--ease-spring);
    text-shadow: 0 0 20px rgba(201, 161, 74, 0.6);
    pointer-events: none;
}
.book__edge:disabled { cursor: default; }
.book__edge:disabled:hover { background: transparent; }
.book__edge:disabled:hover .book__edge-arrow { opacity: 0; }

/* ═══════════════════════ THE PAGES ═══════════════════════ */

/* PERF: contain:strict tells the browser this subtree's painting and layout
   is isolated — no need to invalidate parents on changes inside the page.
   Combined with backface-visibility:hidden this puts each page on its own
   GPU layer for the duration of the turn. */
.page {
    position: absolute;
    top: 0;
    width: 50%;
    height: 100%;
    background: var(--c-page);
    color: var(--c-ink);
    overflow: hidden;
    transform-style: preserve-3d;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    box-shadow: var(--shadow-page);
    contain: layout paint style;
}
.page--left {
    left: 0;
    transform-origin: right center;
    border-radius: 6px 2px 2px 6px;
    background:
        linear-gradient(to right, rgba(60, 40, 15, 0.18) 0%, rgba(60, 40, 15, 0.04) 4%, transparent 8%),
        var(--c-page);
}
.page--right {
    right: 0;
    transform-origin: left center;
    border-radius: 2px 6px 6px 2px;
    background:
        linear-gradient(to left, rgba(60, 40, 15, 0.18) 0%, rgba(60, 40, 15, 0.04) 4%, transparent 8%),
        var(--c-page);
}

.page__inner {
    position: absolute;
    inset: 0;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* PERF: removed mix-blend-mode (was preventing GPU layer compositing for the
   whole page). Pre-baked the multiplied colors directly so the result looks
   the same without the blend operation. */
.page::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(ellipse at 30% 20%, rgba(120, 95, 55, 0.07), transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(120, 95, 55, 0.05), transparent 50%);
    pointer-events: none;
    opacity: 0.9;
    z-index: 1;
}
/* PERF: removed feTurbulence noise — was the largest single perf cost
   (fractal-noise SVG filter recomputed on each page repaint, plus
   mix-blend-mode preventing GPU compositing). Replaced with a tiny
   repeating-linear-gradient stipple that the rasterizer caches as one tile. */
.page::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        repeating-linear-gradient(
            45deg,
            rgba(120, 95, 55, 0.018) 0 1px,
            transparent 1px 3px
        ),
        repeating-linear-gradient(
            -45deg,
            rgba(120, 95, 55, 0.012) 0 1px,
            transparent 1px 4px
        );
    pointer-events: none;
    opacity: 1;
    z-index: 2;
}

/* PERF: removed mix-blend-mode (blocks GPU layer compositing of the entire
   .book__pages subtree, which is exactly the subtree that animates during
   page-turns). Pre-darkened the gradient values so the spine still reads. */
.book__pages::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    left: 50%;
    width: 32px;
    transform: translate3d(-50%, 0, 0);
    background: linear-gradient(to right,
        transparent,
        rgba(0,0,0,0.16) 30%,
        rgba(0,0,0,0.28) 50%,
        rgba(0,0,0,0.16) 70%,
        transparent);
    z-index: 50;
    pointer-events: none;
}

/* ═══════════════════════ PAGE CONTENT ═══════════════════════ */

.page__content {
    position: relative;
    z-index: 3;
    flex: 1;
    padding: var(--s-7) var(--s-6) var(--s-6) var(--s-7);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    user-select: text;
}
.page--left .page__content { padding: var(--s-7) var(--s-7) var(--s-6) var(--s-6); }

@media (max-width: 760px) {
    .page__content { padding: var(--s-5) var(--s-4); }
    .page--left .page__content { padding: var(--s-5) var(--s-4); }
}

.page__folio {
    position: absolute;
    bottom: var(--s-4);
    z-index: 5;
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.3em;
    color: var(--c-page-fold);
    text-transform: uppercase;
}
.page--left .page__folio { left: var(--s-6); }
.page--right .page__folio { right: var(--s-6); }
@media (max-width: 760px) {
    .page--left .page__folio { left: var(--s-4); }
    .page--right .page__folio { right: var(--s-4); }
}

.page__chapter-mark {
    position: absolute;
    top: var(--s-4);
    z-index: 5;
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.4em;
    color: var(--c-page-fold);
    text-transform: uppercase;
    max-width: 60%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    opacity: 0.7;
}
.page--left .page__chapter-mark { left: var(--s-6); }
.page--right .page__chapter-mark { right: var(--s-6); text-align: right; }
@media (max-width: 760px) {
    .page--left .page__chapter-mark { left: var(--s-4); font-size: 0.65rem; }
    .page--right .page__chapter-mark { right: var(--s-4); font-size: 0.65rem; }
}

/* ═══════════════════════ COVER PAGE ═══════════════════════ */

.cover {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--s-7) var(--s-5);
    background:
        radial-gradient(ellipse at center, rgba(201, 161, 74, 0.08), transparent 70%),
        linear-gradient(180deg, #1c1410 0%, #2a1f17 50%, #1c1410 100%);
    color: var(--c-gold-soft);
    text-align: center;
    overflow: hidden;
}
.cover::before {
    content: '';
    position: absolute;
    inset: 24px;
    border: 1px solid var(--c-gold-deep);
    border-radius: 2px;
    box-shadow: inset 0 0 60px rgba(201, 161, 74, 0.06);
    pointer-events: none;
}
.cover::after {
    content: '';
    position: absolute;
    inset: 30px;
    border: 1px solid rgba(201, 161, 74, 0.2);
    border-radius: 1px;
    pointer-events: none;
}

/* PERF: drop-shadow filter combined with infinite scale/filter animation
   forces full-element repaint every frame. Replaced with a static SVG
   background glow + transform-only animation (compositor only). */
.cover__crest {
    width: 120px;
    height: 120px;
    margin-bottom: var(--s-6);
    color: var(--c-gold);
    transform: translateZ(0);
}
.cover__crest svg { width: 100%; height: 100%; }

.cover__series {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.6em;
    text-transform: uppercase;
    color: var(--c-gold-deep);
    margin-bottom: var(--s-4);
}
.cover__title {
    font-family: 'UnifrakturMaguntia', 'Cinzel', serif;
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    line-height: 1;
    color: var(--c-gold-bright);
    text-shadow: 0 2px 20px rgba(201, 161, 74, 0.5), 0 0 60px rgba(201, 161, 74, 0.2);
    letter-spacing: 0.02em;
    margin: 0 0 var(--s-3);
}
.cover__subtitle {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: clamp(0.95rem, 1.5vw, 1.15rem);
    color: var(--c-gold-soft);
    letter-spacing: 0.15em;
    margin-bottom: var(--s-7);
    max-width: 80%;
    line-height: 1.4;
}
.cover__divider {
    width: 200px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-gold), transparent);
    margin: var(--s-5) 0;
    position: relative;
}
.cover__divider::before {
    content: '✦';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: #1c1410;
    color: var(--c-gold);
    padding: 0 var(--s-3);
    font-size: 0.9rem;
}
.cover__epigraph {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: var(--t-md);
    color: var(--c-gold-soft);
    max-width: 75%;
    line-height: 1.6;
    opacity: 0.85;
}
.cover__edition {
    position: absolute;
    bottom: var(--s-6);
    left: 0; right: 0;
    font-family: 'Cinzel', serif;
    font-size: 0.65rem;
    letter-spacing: 0.5em;
    color: var(--c-gold-deep);
    text-transform: uppercase;
    text-align: center;
}

/* ═══════════════════════ TOC PAGE ═══════════════════════ */

.toc-page {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.toc-page__header {
    text-align: center;
    margin-bottom: var(--s-5);
    padding-bottom: var(--s-4);
    border-bottom: 1px solid var(--c-page-fold);
    position: relative;
}
.toc-page__header::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -3px;
    transform: translateX(-50%);
    width: 80px;
    height: 5px;
    background: radial-gradient(ellipse, var(--c-gold), transparent);
    opacity: 0.4;
}
.toc-page__eyebrow {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.5em;
    text-transform: uppercase;
    color: var(--c-ink-quote);
    margin-bottom: var(--s-2);
}
.toc-page__title {
    font-family: 'Cinzel', serif;
    font-size: var(--t-2xl);
    color: var(--c-ink);
    margin: 0;
    letter-spacing: 0.04em;
}
.toc-page__list {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: var(--s-3);
    list-style: none;
    padding: 0;
    margin: 0;
}
.toc-page__item {
    display: flex;
    align-items: baseline;
    gap: var(--s-3);
    cursor: pointer;
    padding: var(--s-2) 0;
    border-bottom: 1px dotted var(--c-page-edge);
    transition: all var(--d-quick) var(--ease-soft);
}
.toc-page__item:hover {
    color: var(--c-blood);
    transform: translateX(4px);
}
.toc-page__num {
    font-family: 'Cinzel', serif;
    font-size: var(--t-sm);
    color: var(--c-ink-quote);
    min-width: 32px;
}
.toc-page__name {
    font-family: 'Cormorant Garamond', serif;
    font-size: var(--t-md);
    color: var(--c-ink);
    flex: 1;
    line-height: 1.3;
}
.toc-page__civ {
    font-family: 'Cinzel', serif;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-ink-quote);
    padding: 2px 8px;
    border: 1px solid var(--c-page-edge);
    border-radius: 2px;
}
.toc-page__page {
    font-family: 'Cinzel', serif;
    font-size: var(--t-sm);
    color: var(--c-ink-quote);
    min-width: 32px;
    text-align: right;
}

/* ═══════════════════════ CHAPTER OPENING ═══════════════════════ */

.chapter-opening {
    position: relative;
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--s-6) var(--s-5);
    background:
        radial-gradient(ellipse at center, rgba(201, 161, 74, 0.05), transparent 70%);
}
.chapter-opening__civ-mark {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.6em;
    text-transform: uppercase;
    color: var(--c-ink-quote);
    margin-bottom: var(--s-5);
    padding: var(--s-2) var(--s-4);
    border-top: 1px solid var(--c-page-edge);
    border-bottom: 1px solid var(--c-page-edge);
}
.chapter-opening__num {
    font-family: 'UnifrakturMaguntia', 'Cinzel', serif;
    font-size: clamp(3rem, 8vw, 5rem);
    color: var(--c-gold-deep);
    line-height: 1;
    margin-bottom: var(--s-4);
    opacity: 0.7;
}
.chapter-opening__title {
    font-family: 'Cinzel', serif;
    font-weight: 700;
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    color: var(--c-ink);
    line-height: 1.15;
    margin: 0 0 var(--s-3);
    letter-spacing: 0.02em;
}
.chapter-opening__subtitle {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: var(--t-lg);
    color: var(--c-ink-soft);
    margin: 0 0 var(--s-6);
    line-height: 1.4;
}
.chapter-opening__themes {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--s-2);
    margin-top: var(--s-6);
    max-width: 80%;
}
.chapter-opening__theme {
    font-family: 'Cinzel', serif;
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--c-ink-quote);
    padding: 4px 10px;
    border: 1px solid var(--c-page-edge);
    border-radius: 1px;
}
.chapter-opening__divider {
    width: 100px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--c-gold-deep), transparent);
    margin: var(--s-3) 0;
    position: relative;
}
.chapter-opening__divider::before {
    content: '✦';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    background: var(--c-page);
    color: var(--c-gold-deep);
    padding: 0 var(--s-2);
    font-size: 0.7rem;
}

/* ═══════════════════════ STORY BODY ═══════════════════════ */

.story-body {
    flex: 1;
    overflow: hidden;
    column-count: 1;
    font-family: 'EB Garamond', 'Cormorant Garamond', Georgia, serif;
    font-size: calc(var(--t-base) * var(--reader-scale));
    line-height: 1.65;
    color: var(--c-ink);
    text-align: justify;
    hyphens: auto;
    -webkit-hyphens: auto;
}
.story-body p {
    margin: 0 0 0.8em;
    text-indent: 1.4em;
    orphans: 2;
    widows: 2;
}
.story-body p:first-child { text-indent: 0; }
.story-body p:first-child::first-letter {
    font-family: 'UnifrakturMaguntia', 'Cinzel', serif;
    font-size: 4em;
    float: left;
    line-height: 0.8;
    margin: 0.05em 0.08em -0.05em 0;
    color: var(--c-blood);
    text-shadow: 1px 1px 0 rgba(0,0,0,0.08);
    font-weight: normal;
}
.story-body p[data-style="quote"] {
    font-style: italic;
    text-indent: 0;
    margin: 0.6em 1.4em;
    color: var(--c-ink-quote);
    border-left: 2px solid var(--c-gold-deep);
    padding-left: 0.9em;
}
.story-body p[data-style="hr"] {
    text-indent: 0;
    text-align: center;
    color: var(--c-gold-deep);
    margin: 1.2em 0;
    font-size: 1.2em;
    letter-spacing: 0.5em;
}
.story-body em { color: var(--c-ink-soft); }
.story-body strong { color: var(--c-blood); font-weight: 600; }

/* For continuation pages - no drop cap */
.page--continuation .story-body p:first-child {
    text-indent: 1.4em;
}
.page--continuation .story-body p:first-child::first-letter {
    font-family: inherit;
    font-size: inherit;
    float: none;
    line-height: inherit;
    margin: 0;
    color: inherit;
    text-shadow: none;
}

/* ═══════════════════════ CHAPTER END ═══════════════════════ */

.chapter-end {
    text-align: center;
    margin-top: var(--s-5);
    padding-top: var(--s-4);
    color: var(--c-gold-deep);
    font-family: 'Cinzel', serif;
    letter-spacing: 0.5em;
    font-size: var(--t-md);
}

/* ═══════════════════════ FINAL EPILOGUE PAGE ═══════════════════════ */

.epilogue {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--s-7) var(--s-5);
}
.epilogue__title {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xl);
    color: var(--c-ink);
    margin-bottom: var(--s-4);
    letter-spacing: 0.1em;
}
.epilogue__text {
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: var(--t-md);
    color: var(--c-ink-soft);
    line-height: 1.7;
    max-width: 80%;
    margin-bottom: var(--s-5);
}
.epilogue__seal {
    font-family: 'UnifrakturMaguntia', serif;
    font-size: 4rem;
    color: var(--c-blood);
    opacity: 0.5;
    margin-top: var(--s-5);
}

/* ═══════════════════════ DRAWERS ═══════════════════════ */

.drawer {
    position: fixed;
    inset: 0;
    z-index: 200;
    pointer-events: none;
    visibility: hidden;
    transition: visibility var(--d-medium);
}
.drawer[aria-hidden="false"] {
    pointer-events: auto;
    visibility: visible;
}
/* PERF: removed backdrop-filter — the 65% black scrim already obscures
   what's behind it, blur added cost without meaningful visual gain. */
.drawer__scrim {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.7);
    opacity: 0;
    transition: opacity var(--d-medium) var(--ease-veil);
}
.drawer[aria-hidden="false"] .drawer__scrim { opacity: 1; }

.drawer__panel {
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    width: min(440px, 90vw);
    background: linear-gradient(180deg, #1a1108 0%, #110a06 100%);
    border-right: 1px solid var(--c-gold-deep);
    box-shadow: 20px 0 60px rgba(0,0,0,0.7);
    transform: translateX(-100%);
    transition: transform var(--d-medium) var(--ease-veil);
    display: flex;
    flex-direction: column;
    color: var(--c-gold-soft);
    overflow: hidden;
}
.drawer--right .drawer__panel {
    left: auto;
    right: 0;
    transform: translateX(100%);
    border-right: none;
    border-left: 1px solid var(--c-gold-deep);
    box-shadow: -20px 0 60px rgba(0,0,0,0.7);
}
.drawer[aria-hidden="false"] .drawer__panel { transform: translateX(0); }

.drawer__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--s-5) var(--s-5) var(--s-3);
    border-bottom: 1px solid var(--c-chrome-line);
}
.drawer__title {
    font-family: 'Cinzel', serif;
    font-size: var(--t-md);
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--c-gold-bright);
    margin: 0;
}
.drawer__close {
    width: 36px; height: 36px;
    background: transparent;
    border: 1px solid var(--c-chrome-line);
    border-radius: 2px;
    color: var(--c-gold-soft);
    font-size: 1.4rem;
    line-height: 1;
    transition: all var(--d-quick) var(--ease-soft);
}
.drawer__close:hover {
    border-color: var(--c-gold);
    color: var(--c-gold-bright);
    background: rgba(201, 161, 74, 0.08);
}

.drawer__filters {
    display: flex;
    flex-wrap: wrap;
    gap: var(--s-1);
    padding: var(--s-4) var(--s-5) var(--s-2);
}
.drawer__filter {
    font-family: 'Cinzel', serif;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    background: transparent;
    border: 1px solid var(--c-chrome-line);
    color: var(--c-gold-soft);
    padding: 6px 10px;
    border-radius: 2px;
    transition: all var(--d-quick) var(--ease-soft);
}
.drawer__filter:hover {
    border-color: var(--c-gold);
    color: var(--c-gold-bright);
}
.drawer__filter[aria-selected="true"] {
    background: rgba(201, 161, 74, 0.15);
    border-color: var(--c-gold);
    color: var(--c-gold-bright);
    box-shadow: inset 0 0 8px rgba(201, 161, 74, 0.15);
}

.drawer__search {
    padding: 0 var(--s-5) var(--s-4);
}
.drawer__search input {
    width: 100%;
    background: rgba(201, 161, 74, 0.06);
    border: 1px solid var(--c-chrome-line);
    border-radius: 2px;
    padding: var(--s-3);
    color: var(--c-gold-bright);
    font-family: 'Cormorant Garamond', serif;
    font-size: var(--t-md);
    font-style: italic;
    transition: all var(--d-quick) var(--ease-soft);
}
.drawer__search input::placeholder { color: var(--c-chrome-fg-dim); }
.drawer__search input:focus {
    outline: none;
    border-color: var(--c-gold);
    box-shadow: inset 0 0 12px rgba(201, 161, 74, 0.1), 0 0 0 2px rgba(201, 161, 74, 0.2);
}

.drawer__list {
    flex: 1;
    overflow-y: auto;
    padding: 0 var(--s-4) var(--s-5);
    scrollbar-width: thin;
    scrollbar-color: var(--c-gold-deep) transparent;
}
.drawer__list::-webkit-scrollbar { width: 6px; }
.drawer__list::-webkit-scrollbar-thumb { background: var(--c-gold-deep); border-radius: 3px; }
.drawer__list::-webkit-scrollbar-track { background: transparent; }

.drawer__entry {
    width: 100%;
    display: grid;
    grid-template-columns: 32px 1fr auto;
    gap: var(--s-3);
    align-items: baseline;
    padding: var(--s-3);
    background: transparent;
    border: 1px solid transparent;
    border-radius: 2px;
    color: var(--c-gold-soft);
    text-align: left;
    transition: all var(--d-quick) var(--ease-soft);
    position: relative;
    cursor: pointer;
    margin-bottom: 2px;
}
.drawer__entry:hover {
    background: rgba(201, 161, 74, 0.08);
    border-color: var(--c-chrome-line);
    color: var(--c-gold-bright);
}
.drawer__entry[data-current="true"] {
    background: rgba(201, 161, 74, 0.12);
    border-color: var(--c-gold-deep);
}
.drawer__entry[data-current="true"]::before {
    content: '◆';
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--c-gold);
    font-size: 0.8rem;
}
.drawer__entry-num {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    letter-spacing: 0.1em;
    color: var(--c-gold-deep);
}
.drawer__entry-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.drawer__entry-name {
    font-family: 'Cinzel', serif;
    font-size: var(--t-sm);
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: 0.04em;
}
.drawer__entry-civ {
    font-family: 'Cinzel', serif;
    font-size: 0.6rem;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--c-chrome-fg-dim);
}
.drawer__entry-page {
    font-family: 'Cinzel', serif;
    font-size: var(--t-xs);
    color: var(--c-chrome-fg-dim);
    align-self: center;
}

.drawer__empty {
    text-align: center;
    color: var(--c-chrome-fg-dim);
    padding: var(--s-7);
    font-family: 'Cormorant Garamond', serif;
    font-style: italic;
    font-size: var(--t-md);
}

/* ═══════════════════════ TOAST ═══════════════════════ */

/* PERF: opaque background, no backdrop-filter. Transition narrowed from
   "all" to specific properties (transform/opacity) so the browser doesn't
   have to interpolate every property change. */
.toast {
    position: fixed;
    bottom: 100px;
    left: 50%;
    transform: translate3d(-50%, 20px, 0);
    z-index: 300;
    padding: var(--s-3) var(--s-5);
    background: rgba(28, 20, 16, 0.98);
    border: 1px solid var(--c-gold);
    border-radius: 2px;
    color: var(--c-gold-bright);
    font-family: 'Cinzel', serif;
    font-size: var(--t-sm);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    box-shadow: 0 8px 24px rgba(0,0,0,0.45);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--d-medium) var(--ease-spring), opacity var(--d-medium) var(--ease-spring);
}
.toast.is-visible {
    transform: translate3d(-50%, 0, 0);
}
.toast.is-visible {
    opacity: 1;
}

/* ═══════════════════════ HINT BAR ═══════════════════════ */

.hint {
    position: fixed;
    bottom: 92px;
    left: 50%;
    transform: translate3d(-50%, 0, 0);
    z-index: 25;
    display: flex;
    gap: var(--s-5);
    padding: var(--s-2) var(--s-5);
    background: rgba(28, 20, 16, 0.92);
    border: 1px solid var(--c-chrome-line);
    border-radius: 2px;
    color: var(--c-chrome-fg-dim);
    font-family: 'Cinzel', serif;
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--d-medium) var(--ease-veil);
}
.hint.is-visible { opacity: 1; }
.hint kbd {
    display: inline-block;
    padding: 1px 5px;
    margin-right: 4px;
    background: rgba(201, 161, 74, 0.1);
    border: 1px solid var(--c-chrome-line);
    border-radius: 2px;
    font-family: 'Cinzel', serif;
    font-size: 0.6rem;
    color: var(--c-gold-soft);
}
@media (max-width: 760px) {
    .hint { display: none; }
}

/* ═══════════════════════ BOOK RIBBON ═══════════════════════ */

.book__ribbon {
    position: absolute;
    top: -12px;
    right: 8%;
    width: 28px;
    height: 0;
    z-index: 80;
    background: linear-gradient(180deg, #7a1f1f 0%, #5a1010 100%);
    box-shadow: 1px 0 4px rgba(0,0,0,0.4), inset -2px 0 4px rgba(0,0,0,0.3);
    transition: height var(--d-medium) var(--ease-spring);
    pointer-events: none;
}
.book__ribbon::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 0;
    height: 0;
    border-left: 14px solid #7a1f1f;
    border-right: 14px solid #5a1010;
    border-bottom: 10px solid transparent;
}
.book__ribbon.is-visible { height: 110px; }

/* ═══════════════════════ FULLSCREEN ═══════════════════════ */

body.is-fullscreen .stage { padding-top: 40px; padding-bottom: 50px; }

/* ═══════════════════════ PRINT ═══════════════════════ */

.print-mount { display: none; }

/* ════════════════════════════════════════════════════════════════
   PERF-LITE OVERRIDES
   Activated by [data-perf="lite"] on <html>. Strips every animated
   filter, every backdrop blur, every infinite ambient motion. Page
   turns become opacity crossfades (see animations.css). Aesthetic
   stays — only the GPU-expensive bits are removed.
   ════════════════════════════════════════════════════════════════ */

[data-perf="lite"] .ambient__nebula,
[data-perf="lite"] .ambient__dust { display: none; }

[data-perf="lite"] .chrome {
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    background: var(--c-chrome-bg);
}

[data-perf="lite"] .page::before,
[data-perf="lite"] .page::after { display: none; }

[data-perf="lite"] .page {
    /* Solid page color reads almost identically without the texture overlays. */
    background: var(--c-page);
}

[data-perf="lite"] .book__shadow {
    box-shadow: 0 14px 28px -10px rgba(0,0,0,0.55);
}

[data-perf="lite"] .stage__pedestal { display: none; }

[data-perf="lite"] .chrome__monogram {
    box-shadow: none;
}

/* ═══════════════════════ MOBILE OPTIMIZATIONS ═══════════════════════
   Below 760px we always operate in a stripped configuration regardless
   of perf mode — touch devices have weaker GPUs and the small viewport
   doesn't need the same depth of decoration. */

@media (max-width: 760px) {
    .ambient__nebula,
    .ambient__dust { display: none; }

    .chrome {
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
    }

    .page::after { display: none; }   /* keep ::before tint, drop stipple */

    .stage__pedestal { display: none; }

    /* Page-flip is purely a transform animation on mobile too — but if the
       device can do 3D well, we still try. Scripts will detect and toggle. */
}

/* ═══════════════════════ HOVER GUARD ═══════════════════════
   Hover effects are pointless on touch and trigger sticky :hover states
   on tap. Confine them to devices with real pointers. */

@media (hover: none) {
    .chrome__btn:hover,
    .chrome__nav:hover,
    .drawer__close:hover,
    .drawer__filter:hover,
    .drawer__entry:hover,
    .toc-page__item:hover,
    .book__edge:hover { background: initial; border-color: var(--c-chrome-line); color: inherit; }
    .book__edge:hover .book__edge-arrow { opacity: 0; }
}

/* See animations.css for keyframes & transition rules */
/* See pdf-export styles in pdf-export.js stylesheet */