/* ─── Reader View ────────────────────────────────────────── */
.reader-wrapper {
    position: fixed;
    inset: 0;
    /* Background moved to pseudo-element to allow ambience layering */
    background: transparent;
    color: var(--book-text);
    z-index: 100;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    isolation: isolate;
}

.reader-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--book-bg);
    z-index: 0;
    /* Behind Ambience (1) */
}

.reader-progress-bar {
    height: 3px;
    background: var(--book-accent);
    box-shadow: 0 0 12px color-mix(in srgb, var(--book-accent) 50%, transparent);
    transition: width 0.2s ease;
    position: relative;
    z-index: 10;
}

.reader-container {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    position: relative;
    z-index: 5;
    /* Above Ambience */
    padding: 0 2rem 6rem;
    /* Increased bottom padding for the fixed nav */
    background: transparent !important;
    /* Ensure no bg hides ambience */
}

.reader-status-bar {
    position: fixed;
    bottom: 24px;
    right: 24px;
    background: var(--book-surface);
    border: 1px solid var(--book-border);
    color: var(--book-text);
    font-family: var(--book-font-heading);
    font-size: 0.8rem;
    padding: 0.3rem 0.8rem;
    border-radius: 99px;
    box-shadow: var(--shadow-sm);
    z-index: 120;
    opacity: 0;
    transform: translateY(10px);
    transition: all 0.3s ease;
    pointer-events: none;
}

.reader-status-bar.visible {
    opacity: 0.9;
    transform: translateY(0);
}

.reader-slider-tooltip {
    position: absolute;
    right: 18px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--book-surface);
    border: 1px solid var(--book-border);
    color: var(--book-text);
    font-size: 0.7rem;
    padding: 0.15rem 0.4rem;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0.9;
    box-shadow: var(--shadow-sm);
    pointer-events: none;
}

.reader-container.focus-mode .reader-toolbar,
.reader-container.focus-mode .chapter-nav {
    opacity: 0;
    pointer-events: none;
}

.reader-container:not(.show-ui) .reader-toolbar,
.reader-container:not(.show-ui) .chapter-nav {
    opacity: 0;
    transform: translateY(-8px);
    pointer-events: none;
}

.reader-content {
    flex: 1;
    overflow: visible;
    padding: 0 0 2rem;
    scroll-behavior: smooth;
    max-width: var(--book-content-max, var(--book-max-width));
    margin: 0 auto;
    width: 100%;
    background: transparent !important;
    /* Ensure no bg hides ambience */
}

/* Toolbar */
.reader-toolbar {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 0;
    border-bottom: 1px solid var(--book-border);
    background: rgba(var(--book-bg-rgb), 0.8);
    backdrop-filter: blur(10px);
    z-index: 10;
    position: sticky;
    top: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.reader-toolbar-center {
    font-family: var(--book-font-heading);
    font-size: 0.95rem;
    opacity: 0.85;
    text-align: center;
    flex: 1;
}

.reader-toolbar-actions {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.reading-time-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 1rem 0 0.5rem;
}

.reading-time-badge,
.remaining-time-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
    border-radius: 999px;
    color: var(--book-accent-dark);
    border: 1px solid var(--book-border);
    background: color-mix(in srgb, var(--book-surface) 70%, transparent);
}

.remaining-time-badge {
    opacity: 0.6;
    border-style: dashed;
}

/* Typography */
.reader-article {
    font-family: var(--book-font-body);
    font-size: calc(var(--book-font-size) * var(--font-size-multiplier, 1));
    line-height: var(--book-line-height);
    color: var(--book-text);
    text-align: justify;
    text-justify: inter-word;
    -webkit-text-justify: inter-word;
    hyphens: auto;
    background: transparent !important;
    /* Ensure no bg hides ambience */
    text-shadow: var(--book-text-shadow, none);
}

.reader-article h1,
.reader-article h2,
.reader-article h3,
.reader-article h4,
.reader-article h5,
.reader-article h6 {
    font-family: var(--book-font-heading);
    color: var(--book-accent-dark);
    line-height: 1.25;
    margin: 1.5rem 0 0.75rem;
}

.reader-article h1 {
    font-size: var(--book-h1-size, 2.2rem);
}

.reader-article h2 {
    font-size: var(--book-h2-size, 1.8rem);
}

.reader-article h3 {
    font-size: 1.4rem;
    margin-top: 4rem;
    margin-bottom: 2rem;
}

.reader-article h4 {
    font-size: 1.2rem;
}

.reader-article h5 {
    font-size: 1.05rem;
}

.reader-article h6 {
    font-size: 0.95rem;
    opacity: 0.85;
}

.chapter-main-title {
    font-family: var(--book-font-heading);
    font-size: 3rem;
    text-align: center;
    margin: 3rem 0 4rem;
    font-weight: 600;
}

.reader-article p {
    margin-bottom: 1.5rem;
}

/* Dropcap */
.dropcap:first-letter {
    float: left;
    font-family: var(--book-font-heading);
    font-size: var(--book-dropcap-size, 4em);
    line-height: 0.82;
    margin: 0.02em 0.12em 0 0;
    color: var(--book-accent);
}

/* Prefaces / Intros HTML injectées */
.book-intro-generated {
    text-align: center;
    padding: 3rem 2rem;
    background: color-mix(in srgb, var(--book-surface) 40%, transparent);
    border: 1px solid var(--book-border);
    border-radius: 16px;
    margin: 3rem auto;
    max-width: 80%;
    box-shadow: var(--shadow-sm);
}

.book-intro-generated h2 {
    font-family: var(--book-font-heading);
    font-size: 2.5rem !important;
    color: var(--book-accent-dark) !important;
    margin-top: 0 !important;
    margin-bottom: 0.5rem !important;
}

.book-intro-generated hr.ornament {
    border: 0;
    height: 2px;
    background: var(--book-accent);
    width: 60px;
    margin: 1.5rem auto 2rem;
    opacity: 0.6;
}

.book-intro-generated p {
    font-size: 1.1em;
    line-height: 1.8;
    color: var(--book-text);
    margin-bottom: 1.2rem;
}

.book-intro-generated .chapter-continuation {
    font-style: italic;
    opacity: 0.8;
    margin-top: 2rem;
}

/* Sidebar / TOC */
.sidebar {
    position: fixed;
    top: 0;
    bottom: 0;
    left: -320px;
    width: 320px;
    background: var(--book-surface);
    border-right: 1px solid var(--book-border);
    transition: left 0.3s ease;
    z-index: 200;
    padding: 2rem;
    overflow-y: auto;
}

.sidebar.open {
    left: 0;
}

/* Navigation */
.chapter-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 2rem;
    background: color-mix(in srgb, var(--book-surface) 90%, transparent);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--book-border);
    z-index: 100;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.reader-container:not(.show-ui) .chapter-nav {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

.chapter-nav-left,
.chapter-nav-right {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.chapter-nav-right {
    justify-content: flex-end;
}

.chapter-nav-center {
    flex: 0 0 auto;
    font-family: var(--book-font-heading);
    font-size: 0.9rem;
    opacity: 0.7;
}

.nav-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: 1px solid transparent;
    color: var(--book-text);
    padding: 0.5rem 0.8rem;
    border-radius: 10px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-fast);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.nav-btn:hover:not(:disabled) {
    background: color-mix(in srgb, var(--book-accent) 10%, transparent);
    border-color: var(--book-border);
}

.jump-controls-inline {
    display: flex;
    gap: 0.5rem;
    margin-left: 1.5rem;
    padding-left: 1.5rem;
    border-left: 1px solid var(--book-border);
}

.jump-btn-small {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: 1px solid var(--book-border);
    background: var(--book-surface);
    color: var(--book-text);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.jump-btn-small:hover {
    border-color: var(--book-accent);
    background: var(--book-accent);
    color: white;
}

/* Section Headings */
.section-heading {
    font-family: var(--book-font-heading);
    font-size: 1.8rem;
    margin: 2.5rem 0 1.5rem;
    color: var(--book-accent-dark);
}

.reader-slider {
    position: fixed;
    right: 12px;
    top: 120px;
    bottom: 120px;
    width: 6px;
    background: color-mix(in srgb, var(--book-border) 40%, transparent);
    border-radius: 999px;
    cursor: pointer;
    z-index: 110;
}

.reader-slider-handle {
    position: absolute;
    left: -4px;
    width: 14px;
    background: var(--book-accent);
    border-radius: 999px;
    box-shadow: 0 4px 12px color-mix(in srgb, var(--book-accent) 40%, transparent);
}

.reader-slider-progress {
    position: absolute;
    right: 24px;
    transform: translateY(-50%);
    background: var(--book-surface);
    border: 1px solid var(--book-border);
    color: var(--book-text);
    font-size: 0.75rem;
    padding: 0.2rem 0.45rem;
    border-radius: 10px;
    box-shadow: var(--shadow-sm);
    pointer-events: none;
}

.chapter-cover {
    max-width: var(--book-content-max, var(--book-max-width));
    margin: 1rem auto 1.5rem;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--book-border);
    box-shadow: var(--shadow-md);
}

.chapter-cover img {
    width: 100%;
    height: auto;
    display: block;
}



.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-fast);
    z-index: 150;
}

.sidebar-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.sidebar-body {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toc-section-label {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: color-mix(in srgb, var(--book-text) 60%, transparent);
    margin: 0.5rem 0;
}

.toc-item {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.5rem 0.7rem;
    border-radius: 10px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: border-color var(--transition-fast), background var(--transition-fast);
}

.toc-item:hover {
    border-color: var(--book-border);
    background: color-mix(in srgb, var(--book-surface) 70%, transparent);
}

.toc-item.active {
    border-color: var(--book-accent);
    background: color-mix(in srgb, var(--book-accent) 12%, transparent);
}

.toc-num {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    border: 1px solid var(--book-border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.7rem;
}