.viewer-page {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    min-height: 100vh;
    min-height: 100dvh;
    overflow: hidden;
    background: radial-gradient(circle at top, #334155, #020617 70%);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
}
html:has(body.viewer-page) {
    width: 100%;
    height: 100%;
    overflow: hidden;
}
.viewer-page * {
    scrollbar-width: none;
}
.viewer-page *::-webkit-scrollbar {
    width: 0;
    height: 0;
}
.viewer-toolbar {
    flex: 0 0 72px;
    height: 72px;
    display: grid;
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    gap: 20px;
    padding: 0 18px;
    border-bottom: 1px solid rgba(255,255,255,.12);
    background: rgba(2,6,23,.7);
    backdrop-filter: blur(12px);
    position: relative;
    z-index: 20;
    overflow: hidden;
}
.viewer-toolbar .brand {
    color: white;
    white-space: nowrap;
}
.viewer-title { min-width: 0; }
.viewer-title strong, .viewer-title span {
    display: block;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
}
.viewer-title span { color: rgba(255,255,255,.65); font-size: .9rem; }
.viewer-actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
    overflow: hidden;
    white-space: nowrap;
}
.viewer-actions button,
.viewer-actions .viewer-download-action,
.viewer-actions .viewer-catalog-action {
    flex: 0 0 auto;
    min-height: 38px;
    border: 1px solid rgba(255,255,255,.15);
    background: rgba(255,255,255,.1);
    color: white;
    border-radius: 10px;
    padding: 0 12px;
    font: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.viewer-actions button:hover,
.viewer-actions .viewer-download-action:hover,
.viewer-actions .viewer-catalog-action:hover { background: rgba(255,255,255,.2); }
#pageIndicator {
    flex: 0 0 auto;
    min-width: 72px;
    text-align: center;
    color: rgba(255,255,255,.8);
    font-weight: 700;
}
.viewer-main {
    flex: 1 1 auto;
    min-height: 0;
    width: 100%;
    display: grid;
    place-items: center;
    padding: 16px;
    overflow: hidden;
}
.book-wrap {
    width: 100%;
    height: 100%;
    min-width: 0;
    min-height: 0;
    display: grid;
    place-items: center;
    overflow: hidden;
    contain: strict;
}
#book {
    max-width: 100%;
    max-height: 100%;
    filter: drop-shadow(0 22px 60px rgba(0,0,0,.45));
    will-change: transform;
}
.page {
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}
.page img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: white;
}

/* Les couvertures importées manuellement peuvent avoir un ratio différent
   de celui du PDF. On les affiche en plein cadre pour éviter les bandes
   blanches de type letterbox, sans toucher aux pages intérieures. */
.page.custom-cover-page img,
.pdf-thumb.custom-cover-thumb img {
    object-fit: cover;
}
.loading {
    text-align: center;
    color: rgba(255,255,255,.84);
    max-width: min(520px, calc(100vw - 32px));
    overflow: hidden;
}
.loading p { color: white; margin-bottom: 4px; }
.loading small { color: rgba(255,255,255,.65); }
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255,255,255,.25);
    border-top-color: white;
    border-radius: 50%;
    margin: 0 auto 14px;
    animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (max-width: 780px) {
    .viewer-toolbar {
        flex-basis: 96px;
        height: 96px;
        grid-template-columns: minmax(0, 1fr);
        align-items: center;
        gap: 8px;
        padding: 8px 10px;
    }
    .viewer-toolbar .brand {
        text-align: center;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .viewer-title { display: none; }
    .viewer-actions { justify-content: center; gap: 6px; }
    .viewer-actions button,
.viewer-actions .viewer-download-action,
.viewer-actions .viewer-catalog-action { min-height: 34px; padding: 0 10px; border-radius: 9px; }
    .viewer-main { padding: 10px; }
}
@media (max-width: 460px) {
    .viewer-toolbar { flex-basis: 86px; height: 86px; }
    .viewer-actions { gap: 4px; }
    .viewer-actions button,
.viewer-actions .viewer-download-action,
.viewer-actions .viewer-catalog-action { min-height: 32px; padding: 0 8px; }
    #pageIndicator { min-width: 58px; font-size: .88rem; }
    #fullscreenBtn { display: none; }
}
.book-wrap {
    position: relative;
}
.book-hidden-behind-cover {
    visibility: hidden;
    pointer-events: none;
}
.single-page-view {
    position: absolute;
    inset: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    overflow: hidden;
    box-shadow: 0 22px 60px rgba(0,0,0,.45);
    will-change: transform;
}
.single-page-view[hidden] {
    display: none;
}
.single-page-view img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: white;
}
.viewer-actions button:disabled {
    opacity: .38;
    cursor: not-allowed;
}

/* La couverture seule reste manipulable : on fait tourner la feuille interne
   au pointeur, sans réintroduire de page blanche autour. */
.single-page-view {
    background: transparent;
    box-shadow: none;
    overflow: visible;
    perspective: 1800px;
    cursor: grab;
    touch-action: none;
    user-select: none;
}
.single-page-view.dragging-cover {
    cursor: grabbing;
}
.single-page-sheet {
    width: 100%;
    height: 100%;
    position: relative;
    z-index: 2;
    background: white;
    overflow: visible;
    box-shadow: 0 22px 60px rgba(0,0,0,.45);
    transform-style: preserve-3d;
    will-change: transform;
}
.single-page-view.front-cover .single-page-sheet {
    /* Première de couverture : charnière sur le dos, à gauche. */
    transform-origin: left center;
}
.single-page-view.back-cover .single-page-sheet {
    /* Quatrième de couverture : charnière sur le dos, à droite. */
    transform-origin: right center;
}
.sheet-face {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: white;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    transform-style: preserve-3d;
}
.sheet-front {
    transform: rotateY(0deg) translateZ(0.6px);
}
.sheet-back {
    transform: rotateY(180deg) translateZ(0.6px);
}
.sheet-face img,
.single-page-sheet img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: white;
    pointer-events: none;
    -webkit-user-drag: none;
}


/* Page située sous la couverture pendant un glisser manuel.
   Elle reste invisible au repos, puis apparaît progressivement sous la
   première ou la quatrième de couverture, ce qui évite l'effet de feuille
   flottante sans contenu en dessous. */
.single-page-underlay {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: white;
    overflow: hidden;
    box-shadow: 0 18px 45px rgba(0,0,0,.32);
    opacity: 0;
    transition: opacity 140ms ease-out, transform 140ms ease-out;
    pointer-events: none;
}
.single-page-underlay img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: white;
    pointer-events: none;
    -webkit-user-drag: none;
}
.single-page-view.dragging-cover .single-page-underlay {
    transition: none;
}

/* Mode couverture fiable : on retire complètement le moteur page-flip de la
   zone visible, afin qu'aucun faux verso blanc ne puisse rester à côté de la
   première ou de la quatrième de couverture après un retour. */
.book-wrap.cover-mode #book,
.book-wrap.cover-mode #book * {
    visibility: hidden !important;
    opacity: 0 !important;
    pointer-events: none !important;
}
.book-wrap.cover-mode .single-page-view {
    visibility: visible !important;
    opacity: 1 !important;
}

/* Zones de sécurité aux bords du livre : elles interceptent le retour vers
   les couvertures pour éviter que page-flip ne réanime la couverture comme
   une page souple avec un faux feuillet à côté. */
.cover-edge-zone {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 60;
    width: 56%;
    min-width: 160px;
    max-width: none;
    background: transparent;
    pointer-events: auto;
    touch-action: none;
}
.cover-edge-zone[hidden] {
    display: none;
}
.cover-edge-zone.left {
    left: 0;
    cursor: w-resize;
}
.cover-edge-zone.right {
    right: 0;
    cursor: e-resize;
}


/* Téléphone : mode page seule.
   On conserve le geste horizontal de page tournée, mais la page visible prend
   toute la largeur utile au lieu de réduire une double-page. */
.phone-page-mode .viewer-main {
    padding: 8px;
}
.phone-page-mode .book-wrap {
    touch-action: none;
}
.phone-page-mode #book {
    max-width: 100%;
    max-height: 100%;
}
.phone-page-mode .single-page-view {
    max-width: calc(100vw - 16px);
    max-height: calc(100dvh - 112px);
}
@media (max-width: 780px) {
    .cover-edge-zone {
        width: 48%;
        min-width: 96px;
    }
    .single-page-view {
        perspective: 1300px;
    }
}
@media (max-width: 460px) {
    .phone-page-mode .single-page-view {
        max-height: calc(100dvh - 100px);
    }
    .cover-edge-zone {
        width: 52%;
        min-width: 88px;
    }
}

/* Corrige l'attribut hidden : les règles .book-wrap en display:grid ne doivent
   pas rendre visible le conteneur pendant le chargement. */
.book-wrap[hidden] {
    display: none !important;
}


/* Relief optique discret — version non invasive.
   La pliure n'est active que quand le livre est chargé, en double page, hors
   couvertures seules, et elle disparaît pendant toute page en mouvement. */
:root {
    --book-fold-width: clamp(12px, 1.8vw, 28px);
    --book-fold-strength: .34;
    --page-inner-shadow: clamp(18px, 3vw, 44px);
}

.book-wrap {
    position: relative;
}

#book {
    position: relative;
    z-index: 10;
}

/* Ombres internes légères, sans pseudo-éléments : elles font partie des
   pages et ne disparaissent donc plus au simple clic. */
.book-wrap.fold-ready #book .page:nth-child(even) {
    box-shadow: inset calc(var(--page-inner-shadow) * -1) 0 calc(var(--page-inner-shadow) * .9) calc(var(--page-inner-shadow) * -.65) rgba(15,23,42,.32);
}
.book-wrap.fold-ready #book .page:nth-child(odd) {
    box-shadow: inset var(--page-inner-shadow) 0 calc(var(--page-inner-shadow) * .9) calc(var(--page-inner-shadow) * -.65) rgba(15,23,42,.32);
}

/* La gouttière centrale n'est plus un ::after au-dessus du livre. Elle est
   injectée dans le moteur PageFlip, au même niveau que les pages :
   z-index 2 = au-dessus des pages fixes (1), sous les pages tournées (3/5). */
#book .book-fold {
    display: none;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 50%;
    width: var(--book-fold-width);
    transform: translateX(-50%);
    z-index: 2;
    pointer-events: none;
    opacity: var(--book-fold-strength);
    background:
        linear-gradient(to right,
            rgba(255,255,255,0) 0%,
            rgba(255,255,255,.08) 20%,
            rgba(15,23,42,.28) 45%,
            rgba(2,6,23,.34) 50%,
            rgba(15,23,42,.28) 55%,
            rgba(255,255,255,.08) 80%,
            rgba(255,255,255,0) 100%);
    border-radius: 999px;
}
.book-wrap.fold-ready:not(.cover-mode):not(.phone-page-mode) #book .book-fold {
    display: block;
}

/* L'ancien calque ::after est volontairement neutralisé : il était au-dessus
   du livre et passait donc devant la page en cours de rotation. */
.book-wrap::after {
    content: none !important;
}

@media (max-width: 780px) {
    :root {
        --book-fold-width: 0px;
        --page-inner-shadow: 32px;
    }
}

.epub-wrap {
    width: min(820px, 100%);
    height: 100%;
    min-width: 0;
    min-height: 0;
    display: grid;
    place-items: stretch;
    overflow: hidden;
    border-radius: 18px;
    background: #f8fafc;
    box-shadow: 0 22px 60px rgba(0,0,0,.45);
    touch-action: pan-y;
}
.epub-reader {
    width: 100%;
    height: 100%;
    background: #f8fafc;
    color: #111827;
    overflow: hidden;
}
.epub-reader iframe {
    width: 100% !important;
    height: 100% !important;
    background: #f8fafc;
}
.epub-viewer-page .viewer-main {
    padding: 20px;
}
.epub-viewer-page #pageIndicator {
    min-width: 86px;
}
.epub-viewer-page .viewer-actions #pageIndicator {
    font-variant-numeric: tabular-nums;
}
@media (max-width: 780px) {
    .epub-wrap { width: 100%; border-radius: 14px; }
    .epub-viewer-page .viewer-main { padding: 10px; }
    .epub-viewer-page #pageIndicator { min-width: 68px; }
}

.epub-font-select {
    flex: 0 0 auto;
    min-width: 102px;
    min-height: 38px;
    border: 1px solid rgba(255,255,255,.15);
    background: rgba(255,255,255,.1);
    color: white;
    border-radius: 10px;
    padding: 0 28px 0 10px;
    font: inherit;
}
.epub-font-select option {
    color: #111827;
}
@media (max-width: 780px) {
    .epub-font-select {
        min-height: 34px;
        min-width: 86px;
        max-width: 98px;
        padding-left: 8px;
    }
}
@media (max-width: 430px) {
    .epub-font-select {
        max-width: 82px;
    }
}


.viewer-download-form {
    flex: 0 0 auto;
    display: inline-flex !important;
    flex-direction: row !important;
    align-items: center;
    gap: 6px;
    margin: 0;
}
.viewer-download-form button {
    flex: 0 0 auto;
    white-space: nowrap;
    min-height: 38px;
    border: 1px solid rgba(255,255,255,.15);
    background: rgba(255,255,255,.1);
    color: white;
    border-radius: 10px;
    padding: 0 12px;
    font: inherit;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.viewer-download-form button:hover { background: rgba(255,255,255,.2); }
@media (max-width: 780px) {
    .viewer-download-form button { min-height: 34px; padding: 0 10px; border-radius: 9px; }
}



.epub-wrap {
    position: relative;
}
.epub-cover-intro {
    position: absolute;
    inset: 0;
    z-index: 4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 14px;
    padding: clamp(12px, 3vw, 28px);
    background: #111827;
    color: rgba(255,255,255,.82);
    text-align: center;
}
.epub-cover-intro[hidden] {
    display: none !important;
}
.epub-cover-intro img {
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: calc(100% - 42px);
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 18px 54px rgba(0,0,0,.5);
}
.epub-cover-intro span {
    font-size: .92rem;
    font-weight: 800;
}


/* EPUB blank-page fix: le lecteur local doit rendre dans un conteneur mesurable. */
.epub-viewer-page .viewer-main {
    position: relative;
}
.epub-viewer-page .loading {
    position: absolute;
    inset: 0;
    z-index: 8;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: auto;
    pointer-events: none;
}
.epub-viewer-page .loading[hidden] {
    display: none !important;
}
.epub-wrap.epub-preparing {
    opacity: 0;
    pointer-events: none;
}

/* EPUB controls fix: the global select { width:100% } made the font menu huge
   and pushed the navigation arrows out of the toolbar. Keep EPUB controls compact. */
.epub-viewer-page .epub-font-select {
    width: auto !important;
    max-width: 132px;
}

/* EPUB reading comfort: the lateral arrows are outside the toolbar.
   They are centered on the reading area, not on the whole window, and they sit
   just beside the white EPUB panel when there is enough room. */
:root {
    --viewer-toolbar-height: 72px;
    --epub-panel-width: min(820px, calc(100vw - 40px));
}

.epub-side-nav {
    position: fixed;
    inset: 0;
    z-index: 35;
    pointer-events: none;
}
.epub-side-arrow {
    position: fixed;
    top: calc(var(--viewer-toolbar-height) + ((100dvh - var(--viewer-toolbar-height)) / 2));
    transform: translateY(-50%);
    width: clamp(42px, 3.4vw, 54px);
    height: clamp(58px, 8vh, 78px);
    min-width: 0;
    min-height: 0;
    padding: 0;
    border-radius: 999px;
    font: inherit;
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: rgba(15, 23, 42, .58);
    border: 1px solid rgba(255,255,255,.28);
    box-shadow: 0 14px 36px rgba(0,0,0,.30);
    backdrop-filter: blur(10px);
    cursor: pointer;
    pointer-events: auto;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.epub-side-prev {
    left: max(12px, calc((100vw - var(--epub-panel-width)) / 2 - 66px));
}
.epub-side-next {
    right: max(12px, calc((100vw - var(--epub-panel-width)) / 2 - 66px));
}
.epub-side-arrow:hover {
    background: rgba(15, 23, 42, .82);
}
.epub-side-arrow:disabled {
    opacity: .24;
    cursor: not-allowed;
}

@media (max-width: 780px) {
    :root {
        --viewer-toolbar-height: 96px;
        --epub-panel-width: calc(100vw - 20px);
    }
    .epub-side-arrow {
        width: 40px;
        height: 66px;
        font-size: 2.05rem;
        background: rgba(15, 23, 42, .46);
    }
    .epub-side-prev { left: 8px; }
    .epub-side-next { right: 8px; }
}
@media (max-width: 460px) {
    :root {
        --viewer-toolbar-height: 86px;
        --epub-panel-width: calc(100vw - 20px);
    }
    .epub-side-arrow {
        width: 34px;
        height: 58px;
        font-size: 1.85rem;
        opacity: .82;
    }
    .epub-side-prev { left: 6px; }
    .epub-side-next { right: 6px; }
}

/* ===== Identité visuelle Skandalon ===== */
:root {
    --sk-bg-1: #050816;
    --sk-bg-2: #0b1030;
    --sk-panel: rgba(8, 12, 30, .78);
    --sk-line: rgba(194, 173, 255, .18);
    --sk-text: #f6f3ff;
    --sk-muted: rgba(232, 226, 255, .68);
    --sk-accent: #ab7aff;
    --sk-accent-strong: #8f5eff;
    --sk-accent-soft: rgba(171, 122, 255, .14);
    --sk-paper: #fbfaf8;
}

.viewer-page {
    background:
        radial-gradient(circle at top, rgba(92, 73, 162, .28), transparent 28%),
        linear-gradient(180deg, var(--sk-bg-1) 0%, var(--sk-bg-2) 42%, #040815 100%);
}
.viewer-toolbar {
    height: auto;
    min-height: 92px;
    grid-template-columns: minmax(250px, auto) minmax(180px, 1fr) auto;
    gap: 18px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--sk-line);
    background: linear-gradient(180deg, rgba(6, 9, 24, .9) 0%, rgba(7, 11, 26, .78) 100%);
    backdrop-filter: blur(14px);
}
.viewer-brand-block {
    min-width: 0;
}
.viewer-toolbar .brand {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: var(--sk-text);
    text-decoration: none;
    min-width: 0;
}
.viewer-brand-logo {
    width: clamp(56px, 4.4vw, 78px);
    height: clamp(56px, 4.4vw, 78px);
    object-fit: contain;
    flex: 0 0 auto;
    filter: drop-shadow(0 10px 30px rgba(0,0,0,.28));
}
.viewer-brand-logo--horizontal {
    width: clamp(220px, 18vw, 320px);
    height: auto;
    max-height: 72px;
}
.viewer-brand-copy {
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.viewer-brand-title {
    display: block;
    color: #fff;
    font-family: "Pinyon Script", cursive;
    font-size: clamp(2.2rem, 4vw, 4rem);
    line-height: .9;
    letter-spacing: .02em;
    text-shadow: 0 4px 22px rgba(171, 122, 255, .18);
    white-space: nowrap;
}
.viewer-brand-tag {
    display: block;
    margin-top: 4px;
    color: var(--sk-muted);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .09em;
    text-transform: uppercase;
}
.viewer-title {
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.viewer-title strong {
    font-size: 1.08rem;
    color: #fff;
    font-weight: 800;
}
.viewer-title span {
    color: var(--sk-muted);
    font-size: .88rem;
}
.viewer-actions {
    gap: 10px;
    overflow: visible;
    flex-wrap: wrap;
}
.viewer-actions button,
.viewer-actions .viewer-download-action,
.viewer-actions .viewer-catalog-action,
.viewer-download-form button,
.epub-font-select {
    border: 1px solid var(--sk-line);
    background: rgba(255,255,255,.05);
    color: var(--sk-text);
    border-radius: 12px;
    min-height: 40px;
    padding: 0 13px;
    box-shadow: none;
}
.viewer-actions button:hover,
.viewer-actions .viewer-download-action:hover,
.viewer-actions .viewer-catalog-action:hover,
.viewer-download-form button:hover,
.format-chip:hover {
    background: rgba(171, 122, 255, .16);
}
.viewer-catalog-action {
    color: #fff;
}
.viewer-download-form,
.viewer-format-switch {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 3px;
    border-radius: 14px;
    border: 1px solid var(--sk-line);
    background: rgba(255,255,255,.03);
}
.format-chip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0 14px;
    border-radius: 10px;
    color: var(--sk-muted);
    text-decoration: none;
    font-weight: 700;
}
.format-chip.is-active {
    color: #fff;
    background: var(--sk-accent-soft);
    box-shadow: inset 0 0 0 1px rgba(171, 122, 255, .28);
}
.page-indicator,
#pageIndicator {
    min-width: 86px;
    min-height: 40px;
    padding: 0 12px;
    border-radius: 12px;
    border: 1px solid var(--sk-line);
    background: rgba(255,255,255,.03);
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
}
.viewer-main {
    padding: 20px;
}
.book-wrap {
    border-radius: 22px;
}
#book {
    filter: drop-shadow(0 24px 70px rgba(0,0,0,.42));
}
.book-wrap.fold-ready #book .page:nth-child(even) {
    box-shadow: inset calc(var(--page-inner-shadow) * -1) 0 calc(var(--page-inner-shadow) * .9) calc(var(--page-inner-shadow) * -.65) rgba(23,25,40,.24);
}
.book-wrap.fold-ready #book .page:nth-child(odd) {
    box-shadow: inset var(--page-inner-shadow) 0 calc(var(--page-inner-shadow) * .9) calc(var(--page-inner-shadow) * -.65) rgba(23,25,40,.24);
}
.loading {
    color: rgba(255,255,255,.9);
}
.loading p,
.loading small { color: inherit; }

/* PDF : lecteur principal en double page, avec flèches latérales sur desktop. */
.pdf-viewer-page .viewer-actions > #prevBtn,
.pdf-viewer-page .viewer-actions > #nextBtn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    z-index: 35;
    width: 54px;
    height: 74px;
    padding: 0;
    border-radius: 999px;
    font-size: 2.5rem;
    line-height: 1;
    background: rgba(10, 14, 33, .56);
    backdrop-filter: blur(10px);
    border-color: rgba(194, 173, 255, .26);
    box-shadow: 0 16px 36px rgba(0,0,0,.28);
}
.pdf-viewer-page .viewer-actions > #prevBtn { left: 24px; }
.pdf-viewer-page .viewer-actions > #nextBtn { right: 24px; }
.pdf-viewer-page .viewer-actions > #prevBtn:hover,
.pdf-viewer-page .viewer-actions > #nextBtn:hover {
    background: rgba(171, 122, 255, .18);
}
.pdf-viewer-page .viewer-actions > #prevBtn:disabled,
.pdf-viewer-page .viewer-actions > #nextBtn:disabled {
    opacity: .28;
}

.epub-wrap {
    width: min(880px, 100%);
    border-radius: 24px;
    background: var(--sk-paper);
    border: 1px solid rgba(194, 173, 255, .16);
    box-shadow: 0 26px 72px rgba(0,0,0,.42);
}
.epub-reader,
.epub-reader iframe {
    background: var(--sk-paper);
}
.epub-cover-intro {
    background: linear-gradient(180deg, #0b1024 0%, #090e1f 100%);
}
.epub-cover-intro span {
    color: rgba(255,255,255,.84);
    letter-spacing: .02em;
}
.epub-side-arrow {
    background: rgba(10, 14, 33, .56);
    border-color: rgba(194, 173, 255, .28);
}
.epub-side-arrow:hover {
    background: rgba(171, 122, 255, .18);
}

@media (max-width: 1100px) {
    .viewer-toolbar {
        grid-template-columns: minmax(0, 1fr);
        justify-items: stretch;
    }
    .viewer-title {
        order: 3;
    }
    .viewer-actions {
        justify-content: flex-start;
    }
}
@media (max-width: 780px) {
    .viewer-toolbar {
        min-height: 110px;
        padding: 10px 12px;
        gap: 10px;
    }
    .viewer-brand-logo {
        width: 54px;
        height: 54px;
    }
    .viewer-brand-logo--horizontal {
        width: min(220px, 58vw);
        height: auto;
        max-height: 54px;
    }
    .viewer-brand-title {
        font-size: 2.4rem;
    }
    .viewer-brand-tag,
    .viewer-title {
        display: none;
    }
    .viewer-actions {
        gap: 6px;
        justify-content: center;
    }
    .viewer-actions button,
    .viewer-actions .viewer-download-action,
    .viewer-actions .viewer-catalog-action,
    .viewer-download-form button,
    .epub-font-select,
    .page-indicator,
    #pageIndicator {
        min-height: 34px;
        border-radius: 10px;
        font-size: .92rem;
    }
    .viewer-main {
        padding: 10px;
    }
    .pdf-viewer-page .viewer-actions > #prevBtn,
    .pdf-viewer-page .viewer-actions > #nextBtn {
        position: static;
        top: auto;
        left: auto;
        right: auto;
        transform: none;
        width: auto;
        height: 34px;
        padding: 0 10px;
        border-radius: 10px;
        font-size: 1.35rem;
        box-shadow: none;
    }
}
@media (max-width: 520px) {
    .viewer-toolbar {
        min-height: 98px;
    }
    .viewer-brand-title {
        font-size: 2rem;
    }
    .viewer-format-switch {
        order: 1;
    }
    .page-indicator,
    #pageIndicator {
        min-width: 64px;
        padding: 0 10px;
    }
    #fullscreenBtn {
        display: none;
    }
}

/* Correctif flèches PDF : navigation sortie de la barre haute */
.pdf-side-nav {
    position: fixed;
    inset: 0;
    z-index: 35;
    pointer-events: none;
}
.pdf-side-arrow {
    position: fixed;
    top: calc(var(--viewer-toolbar-height) + ((100dvh - var(--viewer-toolbar-height)) / 2));
    transform: translateY(-50%);
    width: clamp(44px, 3.4vw, 56px);
    height: clamp(60px, 8.2vh, 80px);
    min-width: 0;
    min-height: 0;
    padding: 0;
    border-radius: 999px;
    font-size: clamp(2rem, 3vw, 2.8rem);
    line-height: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: rgba(10, 14, 33, .56);
    border: 1px solid rgba(194, 173, 255, .26);
    box-shadow: 0 16px 36px rgba(0,0,0,.28);
    backdrop-filter: blur(10px);
    cursor: pointer;
    pointer-events: auto;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
}
.pdf-side-prev {
    left: max(12px, calc((100vw - var(--current-book-width, min(1120px, calc(100vw - 40px)))) / 2 - 64px));
}
.pdf-side-next {
    right: max(12px, calc((100vw - var(--current-book-width, min(1120px, calc(100vw - 40px)))) / 2 - 64px));
}
.pdf-side-arrow:hover {
    background: rgba(171, 122, 255, .18);
}
.pdf-side-arrow:disabled {
    opacity: .28;
    cursor: not-allowed;
}

/* Désactive l'ancien positionnement PDF si jamais présent */
.pdf-viewer-page .viewer-actions > #prevBtn,
.pdf-viewer-page .viewer-actions > #nextBtn {
    position: static !important;
    top: auto !important;
    left: auto !important;
    right: auto !important;
    transform: none !important;
}

@media (max-width: 780px) {
    .pdf-side-arrow {
        width: 40px;
        height: 66px;
        font-size: 2.05rem;
    }
    .pdf-side-prev { left: 8px; }
    .pdf-side-next { right: 8px; }
}
@media (max-width: 460px) {
    .pdf-side-arrow {
        width: 34px;
        height: 58px;
        font-size: 1.85rem;
        opacity: .84;
    }
    .pdf-side-prev { left: 6px; }
    .pdf-side-next { right: 6px; }
}

/* Barre basse de navigation PDF — inspirée de la proposition 2 */
:root {
    --pdf-nav-height: 96px;
}
.pdf-nav-bar {
    flex: 0 0 var(--pdf-nav-height);
    min-height: var(--pdf-nav-height);
    display: grid;
    grid-template-columns: minmax(180px, 1fr) minmax(260px, 560px) minmax(220px, 1fr);
    align-items: center;
    gap: 18px;
    padding: 12px 24px;
    border-top: 1px solid rgba(194, 173, 255, .16);
    background: linear-gradient(180deg, rgba(7, 11, 26, .72), rgba(5, 8, 20, .9));
    color: var(--sk-text);
    backdrop-filter: blur(14px);
    position: relative;
    z-index: 25;
}
.pdf-nav-bar[hidden] {
    display: none !important;
}
.pdf-nav-title {
    min-width: 0;
    color: rgba(255,255,255,.92);
}
.pdf-nav-title strong,
.pdf-nav-title span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.pdf-nav-title strong {
    font-weight: 800;
    font-size: .98rem;
}
.pdf-nav-title span {
    margin-top: 3px;
    color: var(--sk-muted);
    font-size: .86rem;
}
.pdf-thumb-strip {
    display: flex;
    align-items: center;
    gap: 8px;
    overflow-x: auto;
    overflow-y: hidden;
    min-width: 0;
    padding: 4px 2px 8px;
    scrollbar-width: thin;
}
.pdf-thumb-strip::-webkit-scrollbar {
    height: 5px;
}
.pdf-thumb-strip::-webkit-scrollbar-thumb {
    background: rgba(171, 122, 255, .42);
    border-radius: 999px;
}
.pdf-thumb {
    flex: 0 0 auto;
    width: 44px;
    height: 58px;
    min-width: 0;
    min-height: 0;
    padding: 2px;
    border-radius: 7px;
    border: 1px solid rgba(194, 173, 255, .2);
    background: rgba(255,255,255,.08);
    box-shadow: none;
    overflow: hidden;
}
.pdf-thumb img {
    width: 100%;
    height: 100%;
    display: block;
    object-fit: cover;
    background: white;
    border-radius: 4px;
}
.pdf-thumb.is-active {
    border-color: rgba(171, 122, 255, .95);
    background: rgba(171, 122, 255, .18);
    box-shadow: 0 0 0 2px rgba(171, 122, 255, .16);
}
.pdf-nav-progress {
    display: grid;
    grid-template-columns: auto minmax(120px, 1fr);
    align-items: center;
    gap: 14px;
    min-width: 0;
}
#pdfBottomIndicator {
    color: #d8caff;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}
.pdf-page-slider {
    width: 100%;
    min-width: 0;
    accent-color: var(--sk-accent);
}

.pdf-side-arrow {
    top: calc(var(--viewer-toolbar-height) + ((100dvh - var(--viewer-toolbar-height) - var(--pdf-nav-height)) / 2));
}

@media (max-width: 980px) {
    :root { --pdf-nav-height: 82px; }
    .pdf-nav-bar {
        grid-template-columns: minmax(140px, 1fr) minmax(180px, 420px) minmax(150px, 1fr);
        gap: 12px;
        padding: 10px 14px;
    }
    .pdf-thumb { width: 38px; height: 50px; }
    .pdf-nav-title span { display: none; }
}
@media (max-width: 700px) {
    :root { --pdf-nav-height: 68px; }
    .pdf-nav-bar {
        grid-template-columns: minmax(0, 1fr) minmax(120px, 1fr);
        gap: 12px;
    }
    .pdf-nav-title { display: none; }
    .pdf-thumb-strip { display: none; }
    .pdf-nav-progress {
        grid-column: 1 / -1;
    }
}

/* Plein écran immersif : on garde le document seul, les barres disparaissent. */
.viewer-page.is-reader-fullscreen {
    --viewer-toolbar-height: 0px;
    --pdf-nav-height: 0px;
    background: #020617;
}
.viewer-page.is-reader-fullscreen .viewer-toolbar,
.viewer-page.is-reader-fullscreen .pdf-nav-bar,
.viewer-page.is-reader-fullscreen .epub-nav-bar {
    display: none !important;
}
.viewer-page.is-reader-fullscreen .viewer-main {
    padding: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
}
.pdf-viewer-page.is-reader-fullscreen .book-wrap,
.epub-viewer-page.is-reader-fullscreen .epub-wrap {
    border-radius: 0;
}
.viewer-page.is-reader-fullscreen #book {
    filter: drop-shadow(0 10px 30px rgba(0,0,0,.34));
}
/* Les flèches restent disponibles, mais deviennent beaucoup plus discrètes. */
.viewer-page.is-reader-fullscreen .pdf-side-arrow,
.viewer-page.is-reader-fullscreen .epub-side-arrow {
    opacity: .28;
    background: rgba(2, 6, 23, .28);
    border-color: rgba(255,255,255,.16);
    box-shadow: none;
}
.viewer-page.is-reader-fullscreen .pdf-side-arrow:hover,
.viewer-page.is-reader-fullscreen .epub-side-arrow:hover {
    opacity: .9;
    background: rgba(15, 23, 42, .68);
}
.viewer-page.is-reader-fullscreen .pdf-side-prev,
.viewer-page.is-reader-fullscreen .epub-side-prev {
    left: 10px;
}
.viewer-page.is-reader-fullscreen .pdf-side-next,
.viewer-page.is-reader-fullscreen .epub-side-next {
    right: 10px;
}

/* Plein écran : les barres restent cachées, mais un mini-zoom essentiel reste disponible. */
.fullscreen-reader-controls {
    display: none;
}
.viewer-page.is-reader-fullscreen .fullscreen-reader-controls {
    position: fixed;
    top: 10px;
    right: 10px;
    z-index: 70;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.14);
    background: rgba(2, 6, 23, .34);
    backdrop-filter: blur(10px);
    opacity: .34;
    transition: opacity 140ms ease, background 140ms ease;
}
.viewer-page.is-reader-fullscreen .fullscreen-reader-controls:hover,
.viewer-page.is-reader-fullscreen .fullscreen-reader-controls:focus-within {
    opacity: .96;
    background: rgba(2, 6, 23, .72);
}
.fullscreen-reader-controls button {
    min-width: 38px;
    min-height: 34px;
    padding: 0 12px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.16);
    background: rgba(255,255,255,.08);
    color: #fff;
    box-shadow: none;
    font-weight: 800;
}
.fullscreen-reader-controls button:hover {
    background: rgba(171, 122, 255, .24);
    filter: none;
}
#fullscreenExitBtn {
    font-size: .86rem;
}
@media (max-width: 520px) {
    .viewer-page.is-reader-fullscreen .fullscreen-reader-controls {
        top: auto;
        right: 50%;
        bottom: 10px;
        transform: translateX(50%);
    }
    .fullscreen-reader-controls button {
        min-width: 36px;
        min-height: 32px;
        padding: 0 10px;
    }
}

/* Barre basse de navigation EPUB — sans miniatures, car la pagination est variable */
:root {
    --epub-nav-height: 86px;
}
.epub-nav-bar {
    flex: 0 0 var(--epub-nav-height);
    min-height: var(--epub-nav-height);
    display: grid;
    grid-template-columns: minmax(180px, 1fr) minmax(280px, 560px) minmax(260px, 1fr);
    align-items: center;
    gap: 18px;
    padding: 12px 24px;
    border-top: 1px solid rgba(194, 173, 255, .16);
    background: linear-gradient(180deg, rgba(7, 11, 26, .72), rgba(5, 8, 20, .9));
    color: var(--sk-text);
    backdrop-filter: blur(14px);
    position: relative;
    z-index: 25;
}
.epub-nav-bar[hidden] {
    display: none !important;
}
.epub-nav-title {
    min-width: 0;
    color: rgba(255,255,255,.92);
}
.epub-nav-title strong,
.epub-nav-title span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.epub-nav-title strong {
    font-weight: 800;
    font-size: .98rem;
}
.epub-nav-title span {
    margin-top: 3px;
    color: var(--sk-muted);
    font-size: .86rem;
}
.epub-nav-progress {
    display: grid;
    grid-template-columns: auto auto minmax(130px, 1fr) auto;
    align-items: center;
    gap: 10px;
    min-width: 0;
}
.epub-nav-controls {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    min-width: 0;
    flex-wrap: wrap;
}
.epub-nav-bar button,
.epub-bottom-font-select {
    min-height: 38px;
    min-width: 0;
    border-radius: 999px;
    border: 1px solid rgba(194, 173, 255, .18);
    background: rgba(255,255,255,.06);
    color: #fff;
    box-shadow: none;
    font-weight: 800;
}
.epub-nav-bar button {
    padding: 0 14px;
}
.epub-nav-bar button:hover {
    background: rgba(171, 122, 255, .18);
    filter: none;
}
.epub-nav-bar button:disabled {
    opacity: .34;
    cursor: not-allowed;
}
#epubBottomPrevBtn,
#epubBottomNextBtn {
    width: 42px;
    padding: 0;
    font-size: 1.65rem;
    line-height: 1;
}
#epubBottomIndicator {
    color: #d8caff;
    font-weight: 900;
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    min-width: 78px;
    text-align: center;
}
.epub-progress-slider {
    width: 100%;
    min-width: 0;
    accent-color: var(--sk-accent);
}
.epub-bottom-font-select {
    width: auto !important;
    max-width: 116px;
    padding: 0 28px 0 12px;
}
.epub-bottom-font-select option {
    color: #111827;
}
.epub-side-arrow {
    top: calc(var(--viewer-toolbar-height) + ((100dvh - var(--viewer-toolbar-height) - var(--epub-nav-height)) / 2));
}

/* Plein écran : la barre EPUB disparaît comme la barre PDF. */
.viewer-page.is-reader-fullscreen {
    --epub-nav-height: 0px;
}
.viewer-page.is-reader-fullscreen .epub-nav-bar {
    display: none !important;
}

@media (max-width: 980px) {
    :root { --epub-nav-height: 82px; }
    .epub-nav-bar {
        grid-template-columns: minmax(140px, 1fr) minmax(210px, 1.2fr) minmax(220px, 1fr);
        gap: 12px;
        padding: 10px 14px;
    }
    .epub-nav-title span { display: none; }
    .epub-nav-controls { gap: 6px; }
}
@media (max-width: 700px) {
    :root { --epub-nav-height: 74px; }
    .epub-nav-bar {
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 10px;
        padding: 8px 10px;
    }
    .epub-nav-title { display: none; }
    .epub-nav-progress {
        grid-template-columns: auto auto minmax(90px, 1fr) auto;
        gap: 7px;
    }
    #epubBottomIndicator { min-width: 58px; font-size: .9rem; }
    .epub-nav-controls button:not(#epubBottomFullscreenBtn),
    .epub-bottom-font-select {
        display: none;
    }
    #epubBottomFullscreenBtn {
        min-height: 34px;
        padding: 0 10px;
        font-size: .88rem;
    }
}
@media (max-width: 460px) {
    :root { --epub-nav-height: 66px; }
    .epub-nav-bar { padding: 6px 8px; }
    #epubBottomPrevBtn,
    #epubBottomNextBtn {
        width: 34px;
        min-height: 34px;
        font-size: 1.35rem;
    }
    .epub-progress-slider { max-width: 160px; }
}

/* Accès direct à l’accueil depuis le lecteur */
.viewer-home-action {
    flex: 0 0 auto;
    width: 42px;
    min-width: 42px;
    min-height: 40px;
    border: 1px solid var(--sk-line);
    background: rgba(255,255,255,.05);
    color: var(--sk-text);
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    box-shadow: none;
}
.viewer-home-action:hover {
    background: rgba(171, 122, 255, .16);
}
.viewer-home-action svg {
    display: block;
}
@media (max-width: 780px) {
    .viewer-home-action {
        min-height: 34px;
        min-width: 36px;
        width: 36px;
        border-radius: 10px;
    }
}

/* ===== Attente PDF progressive ===== */
.pdf-viewer-page .loading {
    width: min(720px, calc(100vw - 32px));
    max-width: none;
}
.loading-card {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    gap: clamp(16px, 4vw, 34px);
    padding: clamp(18px, 4vw, 34px);
    border-radius: 28px;
    border: 1px solid rgba(194, 173, 255, .22);
    background: linear-gradient(135deg, rgba(255,255,255,.12), rgba(255,255,255,.045));
    box-shadow: 0 24px 80px rgba(0,0,0,.34);
    backdrop-filter: blur(18px);
}
.loading-cover {
    width: clamp(92px, 18vw, 168px);
    max-height: min(260px, 45vh);
    object-fit: contain;
    border-radius: 14px;
    background: white;
    box-shadow: 0 18px 50px rgba(0,0,0,.42);
}
.loading-copy {
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
.loading-copy p {
    margin: 0 0 6px;
    font-size: clamp(1.05rem, 2.4vw, 1.45rem);
    line-height: 1.25;
}
.loading-copy p strong {
    font-weight: 800;
}
.loading-progress {
    width: min(360px, 100%);
    height: 9px;
    margin: 16px auto 8px;
    overflow: hidden;
    border-radius: 999px;
    background: rgba(255,255,255,.16);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.06);
}
.loading-progress span {
    display: block;
    width: 0;
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, rgba(171,122,255,.72), rgba(255,255,255,.88));
    transition: width .28s ease;
}
.loading-progress-value {
    display: block;
    font-variant-numeric: tabular-nums;
    font-weight: 800;
}
.loading-hint {
    display: block;
    margin-top: 8px;
    color: rgba(255,255,255,.72) !important;
}
.pdf-large-document .loading-card::after {
    content: "Version de lecture allégée · rendu progressif";
    grid-column: 1 / -1;
    justify-self: center;
    padding: 7px 12px;
    border-radius: 999px;
    color: rgba(255,255,255,.78);
    background: rgba(171,122,255,.12);
    border: 1px solid rgba(171,122,255,.2);
    font-size: .82rem;
    font-weight: 800;
}
.page.page-pending img {
    opacity: .88;
}
.pdf-thumb.is-pending img {
    opacity: .68;
    filter: saturate(.65);
}
.pdf-still-rendering #pageIndicator::after {
    content: "";
    width: .42em;
    height: .42em;
    margin-left: .45em;
    border-radius: 999px;
    background: currentColor;
    opacity: .68;
    animation: pdfPulse 1.15s ease-in-out infinite;
}
@keyframes pdfPulse {
    0%, 100% { transform: scale(.74); opacity: .38; }
    50% { transform: scale(1); opacity: .9; }
}
@media (max-width: 640px) {
    .loading-card {
        grid-template-columns: minmax(0, 1fr);
    }
    .loading-cover {
        justify-self: center;
        width: min(132px, 40vw);
        max-height: 28vh;
    }
}

/* ===== Correctif mobile lisibilité / navigation ===== */
.mobile-reader-notice {
    display: none;
}
.mobile-reader-notice[hidden] {
    display: none !important;
}
.mobile-reader-notice p {
    margin: 0;
    min-width: 0;
    color: rgba(255,255,255,.88);
    font-size: .9rem;
    line-height: 1.35;
}
.mobile-reader-notice strong {
    color: #fff;
}
.mobile-reader-notice a,
.mobile-reader-notice button {
    flex: 0 0 auto;
    min-height: 34px;
    border-radius: 999px;
    border: 1px solid rgba(194, 173, 255, .26);
    background: rgba(255,255,255,.07);
    color: #fff;
    padding: 0 12px;
    font: inherit;
    font-weight: 800;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
}
.mobile-reader-notice .mobile-notice-primary {
    background: rgba(171, 122, 255, .22);
    border-color: rgba(171, 122, 255, .46);
}
.pdf-nav-page-btn {
    min-width: 42px;
    min-height: 38px;
    padding: 0;
    border-radius: 999px;
    border: 1px solid rgba(194, 173, 255, .22);
    background: rgba(255,255,255,.06);
    color: #fff;
    font: inherit;
    font-size: 1.55rem;
    line-height: 1;
    font-weight: 900;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: none;
}
.pdf-nav-page-btn:disabled {
    opacity: .34;
    cursor: not-allowed;
}
.pdf-nav-progress {
    grid-template-columns: auto auto minmax(120px, 1fr) auto;
}
#pdfBottomIndicator {
    text-align: center;
    min-width: 72px;
}

@media (max-width: 780px) {
    .viewer-page {
        --viewer-toolbar-height: 62px;
        --pdf-nav-height: 72px;
        --epub-nav-height: 72px;
        width: 100vw;
        height: 100dvh;
        min-height: 100dvh;
    }
    .viewer-page:not(.is-reader-fullscreen) .mobile-reader-notice {
        display: flex;
        flex: 0 0 auto;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 8px 10px;
        border-bottom: 1px solid rgba(194, 173, 255, .18);
        background: linear-gradient(180deg, rgba(24, 18, 48, .94), rgba(9, 12, 30, .94));
        backdrop-filter: blur(12px);
        position: relative;
        z-index: 75;
    }
    .viewer-page.is-reader-fullscreen .mobile-reader-notice {
        display: none !important;
    }
    .mobile-reader-notice[hidden] {
        display: none !important;
    }
    .mobile-reader-notice p {
        font-size: .82rem;
    }
    .mobile-reader-notice a,
    .mobile-reader-notice button {
        min-height: 30px;
        padding: 0 10px;
        font-size: .82rem;
        white-space: nowrap;
    }

    .viewer-toolbar {
        flex: 0 0 var(--viewer-toolbar-height) !important;
        height: var(--viewer-toolbar-height) !important;
        min-height: var(--viewer-toolbar-height) !important;
        display: grid !important;
        grid-template-columns: auto minmax(0, 1fr) !important;
        grid-template-areas: "brand actions";
        align-items: center !important;
        gap: 8px !important;
        padding: 6px 8px !important;
        overflow: visible !important;
    }
    .viewer-brand-block {
        grid-area: brand;
        min-width: 0;
    }
    .viewer-toolbar .brand {
        gap: 8px;
    }
    .viewer-brand-logo {
        width: 40px !important;
        height: 40px !important;
    }
    .viewer-brand-title {
        font-size: 1.55rem !important;
        line-height: .95;
        max-width: 118px;
        overflow: hidden;
        text-overflow: ellipsis;
    }
    .viewer-brand-tag,
    .viewer-title {
        display: none !important;
    }
    .viewer-actions {
        grid-area: actions;
        justify-content: flex-end !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        overflow-y: visible !important;
        white-space: nowrap;
        gap: 5px !important;
        min-width: 0;
        padding-bottom: 2px;
    }
    .viewer-actions::-webkit-scrollbar {
        display: none;
    }
    .viewer-actions button,
    .viewer-actions .viewer-catalog-action,
    .viewer-download-form button,
    .epub-font-select,
    .page-indicator,
    #pageIndicator,
    .viewer-home-action {
        min-height: 32px !important;
        border-radius: 10px !important;
        font-size: .86rem !important;
    }
    .viewer-catalog-action,
    .viewer-download-form,
    .epub-font-select,
    #fullscreenBtn,
    .viewer-actions #pageIndicator {
        display: none !important;
    }
    .viewer-home-action {
        width: 34px !important;
        min-width: 34px !important;
        padding: 0 !important;
    }
    .viewer-format-switch {
        gap: 2px !important;
        padding: 2px !important;
        border-radius: 12px !important;
    }
    .format-chip {
        min-height: 30px !important;
        padding: 0 8px !important;
        border-radius: 9px !important;
        font-size: .82rem !important;
    }
    .viewer-actions #zoomOutBtn,
    .viewer-actions #zoomInBtn {
        min-width: 32px;
        padding: 0 8px !important;
    }

    .viewer-main {
        flex: 1 1 0 !important;
        min-height: 0 !important;
        height: auto !important;
        padding: 4px !important;
        overflow: hidden !important;
    }
    .book-wrap,
    .epub-wrap {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        max-height: 100% !important;
    }
    .phone-page-mode .viewer-main {
        padding: 2px 3px !important;
    }
    .phone-page-mode .single-page-view {
        max-width: calc(100vw - 6px) !important;
        max-height: 100% !important;
    }
    .phone-page-mode #book {
        filter: drop-shadow(0 12px 28px rgba(0,0,0,.38));
    }

    .pdf-nav-bar,
    .epub-nav-bar {
        flex: 0 0 var(--pdf-nav-height) !important;
        min-height: var(--pdf-nav-height) !important;
        width: 100% !important;
        box-sizing: border-box;
        position: relative !important;
        z-index: 90 !important;
        padding: 7px 9px calc(7px + env(safe-area-inset-bottom)) !important;
        border-top: 1px solid rgba(194, 173, 255, .24);
        background: linear-gradient(180deg, rgba(7, 11, 26, .92), rgba(5, 8, 20, .98));
        backdrop-filter: blur(16px);
    }
    .epub-nav-bar {
        flex-basis: var(--epub-nav-height) !important;
        min-height: var(--epub-nav-height) !important;
    }
    .pdf-nav-title,
    .pdf-thumb-strip,
    .epub-nav-title {
        display: none !important;
    }
    .pdf-nav-bar {
        grid-template-columns: minmax(0, 1fr) !important;
        gap: 0 !important;
    }
    .pdf-nav-progress {
        grid-column: 1 / -1 !important;
        grid-template-columns: 36px minmax(48px, auto) minmax(0, 1fr) 36px !important;
        gap: 8px !important;
        width: 100%;
    }
    .pdf-nav-page-btn {
        min-width: 36px;
        min-height: 36px;
        font-size: 1.35rem;
    }
    #pdfBottomIndicator {
        min-width: 50px;
        font-size: .86rem;
    }
    .pdf-page-slider {
        min-width: 0;
    }
    .pdf-side-nav,
    .epub-side-nav {
        display: none !important;
    }

    .epub-viewer-page .viewer-main {
        padding: 0 !important;
    }
    .epub-wrap {
        border-radius: 0 !important;
        border: 0 !important;
        box-shadow: none !important;
        background: var(--sk-paper);
    }
    .epub-nav-bar {
        grid-template-columns: minmax(0, 1fr) auto !important;
        gap: 8px !important;
    }
    .epub-nav-progress {
        grid-template-columns: 34px minmax(50px, auto) minmax(70px, 1fr) 34px !important;
        gap: 6px !important;
    }
    .epub-nav-controls {
        display: inline-flex !important;
        gap: 5px !important;
    }
    .epub-nav-controls button:not(#epubBottomFullscreenBtn) {
        display: inline-flex !important;
        min-width: 34px !important;
        min-height: 34px !important;
        padding: 0 8px !important;
    }
    #epubBottomFullscreenBtn,
    .epub-bottom-font-select {
        display: none !important;
    }
    #epubBottomPrevBtn,
    #epubBottomNextBtn {
        width: 34px !important;
        min-height: 34px !important;
    }
    #epubBottomIndicator {
        min-width: 50px !important;
        font-size: .86rem !important;
    }
    .epub-progress-slider {
        max-width: none !important;
        min-width: 0 !important;
    }
}

@media (max-width: 520px) {
    .viewer-page {
        --viewer-toolbar-height: 56px;
        --pdf-nav-height: 68px;
        --epub-nav-height: 68px;
    }
    .viewer-brand-copy {
        display: none !important;
    }
    .viewer-brand-logo {
        width: 38px !important;
        height: 38px !important;
    }
    .mobile-reader-notice {
        align-items: flex-start !important;
        justify-content: flex-start !important;
        gap: 6px !important;
    }
    .mobile-reader-notice p {
        font-size: .78rem !important;
        line-height: 1.25;
    }
    .mobile-reader-notice a,
    .mobile-reader-notice button {
        min-height: 28px !important;
        padding: 0 8px !important;
        font-size: .76rem !important;
    }
    .pdf-nav-progress {
        grid-template-columns: 34px minmax(44px, auto) minmax(0, 1fr) 34px !important;
        gap: 6px !important;
    }
    .epub-nav-progress {
        grid-template-columns: 32px minmax(44px, auto) minmax(56px, 1fr) 32px !important;
        gap: 5px !important;
    }
    .pdf-nav-page-btn,
    #epubBottomPrevBtn,
    #epubBottomNextBtn,
    .epub-nav-controls button:not(#epubBottomFullscreenBtn) {
        min-width: 32px !important;
        width: 32px !important;
        min-height: 32px !important;
    }
}


/* ===== Correctif lecteur petit écran : pleine page avec sortie par croix ===== */
#fullscreenExitBtn {
    font-size: 1.28rem;
    line-height: 1;
}

@media (max-width: 820px), (orientation: portrait) and (max-width: 1180px), (pointer: coarse) and (max-width: 1024px) {
    .viewer-page.is-mobile-reader-fullpage {
        --viewer-toolbar-height: 0px;
        --pdf-nav-height: 0px;
        --epub-nav-height: 0px;
        background: #020617;
    }

    .viewer-page.is-mobile-reader-fullpage .viewer-toolbar,
    .viewer-page.is-mobile-reader-fullpage .mobile-reader-notice,
    .viewer-page.is-mobile-reader-fullpage .pdf-nav-bar,
    .viewer-page.is-mobile-reader-fullpage .epub-nav-bar {
        display: none !important;
    }

    .viewer-page.is-mobile-reader-fullpage .viewer-main {
        flex: 1 1 auto !important;
        width: 100vw !important;
        height: 100vh !important;
        height: 100dvh !important;
        padding: 0 !important;
    }

    .viewer-page.is-mobile-reader-fullpage .book-wrap,
    .viewer-page.is-mobile-reader-fullpage .epub-wrap {
        width: 100% !important;
        height: 100% !important;
        max-width: 100% !important;
        max-height: 100% !important;
        border-radius: 0 !important;
        border: 0 !important;
        box-shadow: none !important;
    }

    .viewer-page.is-mobile-reader-fullpage .epub-reader,
    .viewer-page.is-mobile-reader-fullpage .epub-reader iframe {
        height: 100% !important;
    }

    .viewer-page.is-mobile-reader-fullpage .pdf-side-nav,
    .viewer-page.is-mobile-reader-fullpage .epub-side-nav {
        display: block !important;
    }

    .viewer-page.is-mobile-reader-fullpage .pdf-side-arrow,
    .viewer-page.is-mobile-reader-fullpage .epub-side-arrow {
        top: 50% !important;
        width: 34px !important;
        height: 58px !important;
        opacity: .34;
        background: rgba(2, 6, 23, .24);
        border-color: rgba(255,255,255,.14);
        box-shadow: none;
    }

    .viewer-page.is-mobile-reader-fullpage .pdf-side-arrow:hover,
    .viewer-page.is-mobile-reader-fullpage .epub-side-arrow:hover,
    .viewer-page.is-mobile-reader-fullpage .pdf-side-arrow:focus-visible,
    .viewer-page.is-mobile-reader-fullpage .epub-side-arrow:focus-visible {
        opacity: .92;
        background: rgba(15, 23, 42, .72);
    }

    .viewer-page.is-mobile-reader-fullpage .pdf-side-prev,
    .viewer-page.is-mobile-reader-fullpage .epub-side-prev {
        left: 6px !important;
    }

    .viewer-page.is-mobile-reader-fullpage .pdf-side-next,
    .viewer-page.is-mobile-reader-fullpage .epub-side-next {
        right: 6px !important;
    }

    .viewer-page.is-mobile-reader-fullpage .fullscreen-reader-controls {
        position: fixed;
        top: max(10px, env(safe-area-inset-top));
        right: max(10px, env(safe-area-inset-right));
        bottom: auto;
        z-index: 110;
        display: inline-flex;
        transform: none;
        opacity: .9;
        background: rgba(2, 6, 23, .58);
        backdrop-filter: blur(12px);
    }

    .viewer-page.is-mobile-reader-fullpage #fullscreenExitBtn {
        width: 36px;
        min-width: 36px;
        padding: 0;
        font-size: 1.65rem;
        border-color: rgba(255,255,255,.26);
        background: rgba(255,255,255,.12);
    }
}

/* Confort de lecture : reprise, format courant, sommaire et accessibilité */
.reader-format-badge,
.resume-reading-btn,
.epub-toc-toggle {
    flex: 0 0 auto;
    min-height: 40px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    border: 1px solid var(--sk-line, rgba(255,255,255,.15));
    background: rgba(255,255,255,.06);
    color: #fff;
    padding: 0 12px;
    font-weight: 800;
    white-space: nowrap;
}
.reader-format-badge {
    color: #d8caff;
    background: rgba(171, 122, 255, .12);
}
.resume-reading-btn:not([hidden]) {
    background: rgba(245, 206, 117, .14);
    border-color: rgba(245, 206, 117, .28);
}
.reader-shortcuts {
    position: fixed;
    left: 50%;
    bottom: max(8px, env(safe-area-inset-bottom));
    z-index: 28;
    transform: translateX(-50%);
    margin: 0;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.14);
    background: rgba(2, 6, 23, .52);
    color: rgba(255,255,255,.72);
    font-size: .78rem;
    font-weight: 700;
    backdrop-filter: blur(10px);
    pointer-events: none;
}
.viewer-page button:focus-visible,
.viewer-page a:focus-visible,
.viewer-page select:focus-visible,
.viewer-page input:focus-visible {
    outline: 3px solid rgba(245, 206, 117, .9);
    outline-offset: 3px;
}
.epub-toc-panel {
    position: fixed;
    top: calc(var(--viewer-toolbar-height, 72px) + 12px);
    right: 18px;
    z-index: 70;
    width: min(360px, calc(100vw - 28px));
    max-height: calc(100dvh - var(--viewer-toolbar-height, 72px) - 38px);
    display: grid;
    grid-template-rows: auto minmax(0, 1fr);
    border: 1px solid rgba(194, 173, 255, .22);
    border-radius: 18px;
    background: rgba(5, 8, 20, .96);
    color: #fff;
    box-shadow: 0 24px 70px rgba(0,0,0,.42);
    overflow: hidden;
    backdrop-filter: blur(16px);
}
.epub-toc-panel[hidden] {
    display: none !important;
}
.epub-toc-panel-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border-bottom: 1px solid rgba(194, 173, 255, .16);
}
.epub-toc-panel-head strong {
    font-size: 1rem;
}
.epub-toc-panel-head button {
    width: 34px;
    height: 34px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.18);
    background: rgba(255,255,255,.06);
    color: #fff;
    font-size: 1.35rem;
    line-height: 1;
}
.epub-toc-list {
    overflow: auto;
    padding: 8px;
}
.epub-toc-list button {
    width: 100%;
    min-height: 38px;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding: 8px 10px;
    border: 0;
    border-radius: 10px;
    background: transparent;
    color: rgba(255,255,255,.84);
    text-align: left;
    font: inherit;
    font-weight: 750;
}
.epub-toc-list button:hover,
.epub-toc-list button.is-active {
    background: rgba(171, 122, 255, .18);
    color: #fff;
}
.epub-reader {
    overflow: auto;
    scroll-behavior: smooth;
    font-family: var(--epub-reader-font, Georgia, serif);
    font-size: var(--epub-reader-font-size, 110%);
    line-height: 1.68;
}
.epub-lite-section {
    box-sizing: border-box;
    width: min(860px, 100%);
    min-height: 100%;
    margin: 0 auto;
    padding: clamp(24px, 5vw, 64px) clamp(18px, 5vw, 72px);
    color: #111827;
    background: #f8fafc;
    overflow-wrap: break-word;
}
.epub-lite-section p,
.epub-lite-section li,
.epub-lite-section blockquote,
.epub-lite-section dd,
.epub-lite-section dt,
.epub-lite-section div {
    line-height: 1.68;
}
.epub-lite-section img,
.epub-lite-section svg,
.epub-lite-section video,
.epub-lite-section canvas {
    max-width: 100%;
    height: auto;
}
.epub-lite-section a {
    color: #2563eb;
}
@media (max-width: 900px) {
    .reader-shortcuts { display: none; }
    .reader-format-badge { display: none; }
}
@media (max-width: 560px) {
    .resume-reading-btn,
    .epub-toc-toggle { max-width: 138px; overflow: hidden; text-overflow: ellipsis; }
    .epub-toc-panel { top: 8px; right: 8px; }
}