/**
 * eBook Reader Styles
 * @package BookzCart
 */
:root {
    --reader-font-size: 18px;
    --reader-line-height: 1.85;
    --reader-content-max: 780px;
    --reader-sidebar-width: 280px;
    --reader-header-height: 56px;
    --reader-footer-height: 56px;
    --reader-font-family: 'Noto Sans Tamil', 'Inter', sans-serif;
    --reader-transition: .3s cubic-bezier(.4, 0, .2, 1);
    --reader-page-margin: 40px;
    --reader-nav-size: 44px
}

/* Hide site chrome on eBook reader for immersive reading */
body.single-ebook .nav-bar,
body.single-ebook .site-footer,
body.single-ebook .mobile-bottom-nav,
body.single-ebook .back-to-top {
    display: none !important
}

body.single-ebook {
    padding-bottom: 0 !important
}

/* Auth Gate */
.ebook-gate {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    padding: 2rem
}

.ebook-gate-card {
    text-align: center;
    max-width: 420px;
    padding: 3rem 2.5rem;
    border-radius: var(--radius-xl, 16px);
    background: var(--surface-elevated, #fff);
    box-shadow: 0 8px 32px rgba(0, 0, 0, .08);
    border: 1px solid var(--border-light, rgba(0, 0, 0, .06))
}

.ebook-gate-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--palm-leaf, #5b8c5a), var(--deep-indigo, #3a0a5e));
    color: #fff
}

.ebook-gate-icon--purchase {
    background: linear-gradient(135deg, var(--turmeric, #e8a317), var(--palm-leaf, #5b8c5a))
}

.ebook-gate-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 0 .75rem;
    color: var(--text-primary, #1a1a2e)
}

.ebook-gate-card p {
    color: var(--text-secondary, #555);
    margin: 0 0 1.75rem;
    line-height: 1.6
}

.ebook-gate-card .btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .75rem 2rem;
    font-weight: 600
}

.ebook-gate-pricing {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .625rem;
    margin: 0 0 1.5rem;
    flex-wrap: wrap
}

.ebook-gate-regular-price {
    font-size: 1.05rem;
    color: var(--text-tertiary, #888);
    text-decoration: line-through;
    font-weight: 500
}

.ebook-gate-sale-price {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--turmeric, #e8a317);
    letter-spacing: -.02em
}

/* Progress Bar */
.ebook-progress {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--border-light, rgba(0, 0, 0, .06));
    z-index: 1100;
    opacity: 0;
    transition: opacity .3s ease
}

.ebook-progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--palm-leaf, #5b8c5a), var(--turmeric, #e8a317));
    transition: width .4s ease;
    border-radius: 0 2px 2px 0
}

.ui-visible .ebook-progress {
    opacity: 1
}

/* Reader Wrapper */
.ebook-reader {
    position: relative;
    min-height: 100vh;
    overflow: hidden
}

/* Header Bar — hidden by default, shown on .ui-visible */
.ebook-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--reader-header-height);
    padding: 0 1rem;
    border-bottom: 1px solid var(--border-light, rgba(0, 0, 0, .06));
    background: var(--surface-elevated, #fff);
    backdrop-filter: blur(12px);
    opacity: 0;
    transform: translateY(-100%);
    transition: opacity .3s ease, transform .3s ease;
    pointer-events: none
}

.ui-visible .ebook-header {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto
}

.ebook-header-left {
    display: flex;
    align-items: center;
    gap: .75rem;
    min-width: 0
}

.ebook-back-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md, 8px);
    color: var(--text-secondary, #555);
    transition: all var(--reader-transition);
    flex-shrink: 0
}

.ebook-back-link:hover {
    background: var(--surface-hover, rgba(0, 0, 0, .04));
    color: var(--text-primary, #1a1a2e)
}

.ebook-title {
    font-size: 1rem;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
    color: var(--text-primary, #1a1a2e);
    font-family: var(--reader-font-family)
}

.ebook-header-controls {
    display: flex;
    align-items: center;
    gap: .25rem;
    flex-shrink: 0
}

.ebook-ctrl-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: var(--radius-md, 8px);
    background: transparent;
    color: var(--text-secondary, #555);
    cursor: pointer;
    transition: all var(--reader-transition)
}

.ebook-ctrl-btn:hover {
    background: var(--surface-hover, rgba(0, 0, 0, .04));
    color: var(--text-primary, #1a1a2e)
}

.ebook-ctrl-btn.is-active {
    background: var(--palm-leaf, #5b8c5a);
    color: #fff
}

/* TTS Controls */
.ebook-tts-controls {
    display: flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem 1rem;
    border-bottom: 1px solid var(--border-light, rgba(0, 0, 0, .06));
    background: var(--surface-elevated, #fff);
    animation: ebookSlideDown .25s ease
}

.ebook-tts-controls[hidden] {
    display: none
}

@keyframes ebookSlideDown {
    from {
        opacity: 0;
        transform: translateY(-8px)
    }

    to {
        opacity: 1;
        transform: translateY(0)
    }
}

.ebook-tts-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: 1px solid var(--border-light, rgba(0, 0, 0, .1));
    border-radius: var(--radius-sm, 6px);
    background: var(--surface, #fff);
    color: var(--text-secondary, #555);
    cursor: pointer;
    transition: all var(--reader-transition)
}

.ebook-tts-btn:hover {
    border-color: var(--palm-leaf, #5b8c5a);
    color: var(--palm-leaf, #5b8c5a)
}

.ebook-tts-btn.is-active {
    background: var(--palm-leaf, #5b8c5a);
    border-color: var(--palm-leaf, #5b8c5a);
    color: #fff
}

.ebook-tts-speed-label {
    font-size: .75rem;
    color: var(--text-secondary, #555);
    margin-left: .5rem
}

.ebook-tts-speed {
    padding: .25rem .5rem;
    border: 1px solid var(--border-light, rgba(0, 0, 0, .1));
    border-radius: var(--radius-sm, 6px);
    background: var(--surface, #fff);
    color: var(--text-primary, #1a1a2e);
    font-size: .8rem;
    cursor: pointer
}

/* Reader Body Grid */
.ebook-body {
    display: grid;
    grid-template-columns: var(--reader-sidebar-width) 1fr;
    gap: 0;
    min-height: calc(100vh - var(--reader-header-height) - var(--reader-footer-height) - 140px)
}

/* TOC Sidebar */
.ebook-toc {
    position: sticky;
    top: var(--reader-header-height);
    height: calc(100vh - var(--reader-header-height) - 80px);
    overflow-y: auto;
    border-right: 1px solid var(--border-light, rgba(0, 0, 0, .06));
    padding: 1.25rem 0;
    background: var(--surface-elevated, #fff);
    scrollbar-width: thin;
    scrollbar-color: var(--border-light, rgba(0, 0, 0, .1)) transparent
}

.ebook-toc::-webkit-scrollbar {
    width: 4px
}

.ebook-toc::-webkit-scrollbar-thumb {
    background: var(--border-light, rgba(0, 0, 0, .1));
    border-radius: 2px
}

.ebook-toc-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem 1rem;
    border-bottom: 1px solid var(--border-light, rgba(0, 0, 0, .06));
    margin-bottom: .75rem
}

.ebook-toc-title {
    display: flex;
    align-items: center;
    gap: .5rem;
    font-size: .875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--text-secondary, #555);
    margin: 0
}

.ebook-toc-close {
    display: none;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm, 6px);
    background: transparent;
    color: var(--text-secondary, #555);
    cursor: pointer
}

.ebook-toc-list {
    list-style: none;
    margin: 0;
    padding: 0
}

.ebook-toc-link {
    display: flex;
    align-items: center;
    gap: .75rem;
    width: 100%;
    padding: .625rem 1.25rem;
    border: none;
    background: transparent;
    text-align: left;
    font-size: .875rem;
    font-weight: 500;
    color: var(--text-secondary, #555);
    cursor: pointer;
    transition: all var(--reader-transition);
    font-family: var(--reader-font-family);
    line-height: 1.4
}

.ebook-toc-link:hover {
    background: var(--surface-hover, rgba(0, 0, 0, .03));
    color: var(--text-primary, #1a1a2e)
}

.ebook-toc-item.is-active>.ebook-toc-link {
    background: linear-gradient(90deg, rgba(91, 140, 90, .1), transparent);
    color: var(--palm-leaf, #5b8c5a);
    font-weight: 600;
    border-left: 3px solid var(--palm-leaf, #5b8c5a)
}

.ebook-toc-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--surface-dim, rgba(0, 0, 0, .04));
    font-size: .7rem;
    font-weight: 700;
    color: var(--text-secondary, #555);
    flex-shrink: 0;
    transition: all var(--reader-transition)
}

.ebook-toc-item.is-active .ebook-toc-number {
    background: var(--palm-leaf, #5b8c5a);
    color: #fff
}

.ebook-toc-subtopics {
    list-style: none;
    margin: 0;
    padding: 0 0 .5rem 0
}

.ebook-toc-sublink {
    display: block;
    width: 100%;
    padding: .375rem 1.25rem .375rem 3.5rem;
    border: none;
    background: transparent;
    text-align: left;
    font-size: .8rem;
    color: var(--text-tertiary, #888);
    cursor: pointer;
    transition: all var(--reader-transition);
    font-family: var(--reader-font-family)
}

.ebook-toc-sublink:hover {
    color: var(--palm-leaf, #5b8c5a);
    background: var(--surface-hover, rgba(0, 0, 0, .02))
}

.ebook-toc-sublink.is-active {
    color: var(--palm-leaf, #5b8c5a);
    font-weight: 600
}

/* Locked TOC items (sample mode) */
.ebook-toc-item.is-locked > .ebook-toc-link {
    opacity: .5;
    cursor: not-allowed;
    position: relative
}

.ebook-toc-item.is-locked > .ebook-toc-link:hover {
    background: transparent;
    opacity: .6
}

.ebook-toc-lock {
    margin-left: auto;
    opacity: .6;
    flex-shrink: 0
}

/* Content Area — Paginated Viewport (Floating Page Card) */
.ebook-content {
    max-width: var(--reader-content-max);
    margin: 0 auto;
    font-family: var(--reader-font-family);
    font-size: var(--reader-font-size);
    line-height: var(--reader-line-height);
    color: var(--text-primary, #1a1a2e);
    user-select: none;
    -webkit-user-select: none;
    overflow: hidden;
    height: calc(100vh - var(--reader-header-height) - var(--reader-footer-height));
    position: relative;
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .08), 0 0 0 1px rgba(0, 0, 0, .04);
    padding: 0 40px;
    box-sizing: border-box;
    touch-action: pan-y pinch-zoom
}

/* Reader page background (contrast surface behind the card) */
.ebook-reader-wrap {
    background: #f0f0f0;
    min-height: 100vh;
    padding: 0
}

/* CSS Column Pagination Inner Wrapper */
.ebook-columns {
    height: 100%;
    column-fill: auto;
    box-sizing: border-box;
    will-change: transform
}

/* Page-edge shadows for book-like depth */
.ebook-content::before,
.ebook-content::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 40px;
    z-index: 10;
    pointer-events: none;
    transition: opacity .35s ease
}

.ebook-content::before {
    left: 0;
    background: linear-gradient(to right, rgba(0, 0, 0, .06), transparent);
    opacity: 0
}

.ebook-content::after {
    right: 0;
    background: linear-gradient(to left, rgba(0, 0, 0, .06), transparent);
    opacity: 1
}

/* Page-flip animation: directional shadow + subtle perspective lift */
.ebook-content.is-turning::before,
.ebook-content.is-turning::after {
    opacity: 1
}

.ebook-content.is-turning.flip-right .ebook-columns {
    animation: ebookFlipRight 350ms cubic-bezier(0.2, 0.8, 0.3, 1) forwards
}

.ebook-content.is-turning.flip-left .ebook-columns {
    animation: ebookFlipLeft 350ms cubic-bezier(0.2, 0.8, 0.3, 1) forwards
}

@keyframes ebookFlipRight {
    0% {
        box-shadow: -12px 0 28px rgba(0, 0, 0, .12);
        filter: brightness(0.98)
    }
    50% {
        box-shadow: -20px 0 40px rgba(0, 0, 0, .15);
        filter: brightness(0.96)
    }
    100% {
        box-shadow: none;
        filter: brightness(1)
    }
}

@keyframes ebookFlipLeft {
    0% {
        box-shadow: 12px 0 28px rgba(0, 0, 0, .12);
        filter: brightness(0.98)
    }
    50% {
        box-shadow: 20px 0 40px rgba(0, 0, 0, .15);
        filter: brightness(0.96)
    }
    100% {
        box-shadow: none;
        filter: brightness(1)
    }
}

/* Typography inside paginated columns */
.ebook-content h2,
.ebook-content h3,
.ebook-content h4 {
    font-family: var(--reader-font-family);
    margin-top: 1.5em;
    margin-bottom: .75em;
    break-after: avoid
}

.ebook-content h2 {
    font-size: 1.5em
}

.ebook-content h3 {
    font-size: 1.25em
}

.ebook-content p {
    margin: 0 0 1.25em;
    text-align: justify;
    hyphens: auto
}

.ebook-content blockquote {
    margin: 1.5em 0;
    padding: 1rem 1.5rem;
    border-left: 4px solid var(--palm-leaf, #5b8c5a);
    background: var(--surface-dim, rgba(0, 0, 0, .02));
    border-radius: 0 var(--radius-md, 8px) var(--radius-md, 8px) 0;
    font-style: italic;
    break-inside: avoid
}

.ebook-content ul,
.ebook-content ol {
    margin: 1em 0;
    padding-left: 1.5em
}

.ebook-content li {
    margin-bottom: .5em
}

.ebook-content img {
    max-height: 60vh;
    break-inside: avoid
}

.ebook-chapter-title {
    break-after: avoid
}

/* Loading */
.ebook-content-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 40vh;
    gap: 1rem;
    color: var(--text-secondary, #555)
}

.ebook-content-loading[hidden] {
    display: none
}

.ebook-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--border-light, rgba(0, 0, 0, .08));
    border-top-color: var(--palm-leaf, #5b8c5a);
    border-radius: 50%;
    animation: ebookSpin .8s linear infinite
}

@keyframes ebookSpin {
    to {
        transform: rotate(360deg)
    }
}

/* Toast Notification */
.ebook-toast {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: .625rem 1.25rem;
    background: rgba(0, 0, 0, .8);
    color: #fff;
    font-size: .8rem;
    font-weight: 500;
    border-radius: var(--radius-full, 999px);
    white-space: nowrap;
    z-index: 500;
    opacity: 0;
    transition: opacity .3s ease, transform .3s ease;
    pointer-events: none;
    backdrop-filter: blur(8px)
}

.ebook-toast.is-visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0)
}

[data-theme="sepia"] .ebook-toast {
    background: rgba(61, 46, 30, .85)
}

[data-theme="dark"] .ebook-toast {
    background: rgba(255, 255, 255, .15);
    color: #e8e8ec
}

/* TTS Highlight */
.tts-sentence {
    transition: background-color .2s ease, box-shadow .2s ease;
    border-radius: 2px;
    padding: 0 2px
}

.tts-sentence.tts-active {
    background-color: rgba(91, 140, 90, .15);
    box-shadow: 0 0 0 3px rgba(91, 140, 90, .1)
}

/* Footer Nav — Play Books-style bottom bar */
.ebook-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    gap: .75rem;
    height: var(--reader-footer-height);
    padding: 0 1rem;
    background: var(--surface-elevated, #fff);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border-light, rgba(0, 0, 0, .06));
    opacity: 0;
    transform: translateY(100%);
    transition: opacity .3s ease, transform .3s ease;
    pointer-events: none
}

.ui-visible .ebook-footer {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto
}

/* Desktop Page Navigation Arrows */
.ebook-nav-arrow {
    display: none;
    position: fixed;
    top: 50%;
    z-index: 150;
    width: var(--reader-nav-size);
    height: var(--reader-nav-size);
    border: 1px solid var(--border-light, rgba(0, 0, 0, .1));
    border-radius: 50%;
    background: var(--surface-elevated, #fff);
    color: var(--text-secondary, #555);
    cursor: pointer;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, .08);
    transition: all .2s ease;
    transform: translateY(-50%)
}

.ebook-nav-arrow:hover {
    background: var(--surface-hover, #f5f5f5);
    color: var(--text-primary, #1a1a2e);
    box-shadow: 0 4px 16px rgba(0, 0, 0, .12);
    transform: translateY(-50%) scale(1.05)
}

.ebook-nav-arrow:active {
    transform: translateY(-50%) scale(.95)
}

.ebook-nav-arrow:disabled {
    opacity: .3;
    cursor: default;
    pointer-events: none
}

.ebook-nav-arrow--prev {
    left: max(1rem, calc((100vw - var(--reader-content-max) - var(--reader-sidebar-width)) / 2 + var(--reader-sidebar-width) - 60px))
}

.ebook-nav-arrow--next {
    right: max(1rem, calc((100vw - var(--reader-content-max) - var(--reader-sidebar-width)) / 2 - 60px))
}

.ebook-nav-arrow svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round
}

[data-theme="dark"] .ebook-nav-arrow {
    background: rgba(37, 37, 64, .95);
    border-color: rgba(255, 255, 255, .12);
    color: #e8e8ec;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .3)
}

[data-theme="dark"] .ebook-nav-arrow:hover {
    background: rgba(50, 50, 80, .95);
    color: #fff
}

[data-theme="sepia"] .ebook-nav-arrow {
    background: rgba(245, 238, 220, .95);
    border-color: rgba(61, 46, 30, .1);
    color: #6b5a48
}

[data-theme="sepia"] .ebook-nav-arrow:hover {
    color: #3d2e1e
}

/* TOC button in footer */
.ebook-footer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-md, 8px);
    background: transparent;
    color: var(--text-secondary, #555);
    cursor: pointer;
    transition: all var(--reader-transition);
    flex-shrink: 0
}

.ebook-footer-btn:hover {
    background: var(--surface-hover, rgba(0, 0, 0, .04));
    color: var(--text-primary, #1a1a2e)
}

/* Slider wrapper */
.ebook-slider-wrap {
    flex: 1;
    display: flex;
    align-items: center;
    min-width: 0
}

/* Range slider */
.ebook-page-slider {
    width: 100%;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-light, rgba(0, 0, 0, .1));
    border-radius: 2px;
    outline: none;
    cursor: pointer;
    transition: background .2s ease
}

.ebook-page-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--palm-leaf, #5b8c5a);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .15);
    cursor: pointer;
    transition: transform .15s ease
}

.ebook-page-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--palm-leaf, #5b8c5a);
    border: 2px solid #fff;
    box-shadow: 0 1px 4px rgba(0, 0, 0, .15);
    cursor: pointer
}

.ebook-page-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2)
}

/* Page counter */
.ebook-page-counter {
    font-size: .8rem;
    font-weight: 600;
    color: var(--text-secondary, #555);
    white-space: nowrap;
    min-width: 52px;
    text-align: right;
    font-variant-numeric: tabular-nums
}

/* Theme: Sepia (Play Books warmth) */
[data-theme="sepia"] .ebook-reader-wrap {
    background: #e8dfc6
}

[data-theme="sepia"] .ebook-content {
    background: #f5eedc;
    color: #3d2e1e;
    box-shadow: 0 2px 12px rgba(61, 46, 30, .1), 0 0 0 1px rgba(61, 46, 30, .06)
}

[data-theme="sepia"] .ebook-header,
[data-theme="sepia"] .ebook-footer,
[data-theme="sepia"] .ebook-toc,
[data-theme="sepia"] .ebook-tts-controls {
    background-color: rgba(245, 238, 220, .95);
    border-color: rgba(61, 46, 30, .1);
    backdrop-filter: blur(12px)
}

[data-theme="sepia"] .ebook-toc-link {
    color: #6b5a48
}

[data-theme="sepia"] .ebook-toc-item.is-active>.ebook-toc-link {
    background: linear-gradient(90deg, rgba(139, 90, 43, .12), transparent);
    color: #8b5a2b;
    border-left-color: #8b5a2b
}

[data-theme="sepia"] .ebook-toc-item.is-active .ebook-toc-number {
    background: #8b5a2b
}

[data-theme="sepia"] .tts-sentence.tts-active {
    background-color: rgba(139, 90, 43, .15)
}

[data-theme="sepia"] .ebook-ctrl-btn:hover {
    background: rgba(61, 46, 30, .06)
}

[data-theme="sepia"] .ebook-ctrl-btn.is-active {
    background: #8b5a2b
}

[data-theme="sepia"] .ebook-content::before {
    background: linear-gradient(to right, rgba(61, 46, 30, .05), transparent)
}

[data-theme="sepia"] .ebook-content::after {
    background: linear-gradient(to left, rgba(61, 46, 30, .05), transparent)
}

[data-theme="sepia"] .ebook-footer-btn {
    color: #6b5a48
}

[data-theme="sepia"] .ebook-page-slider {
    background: rgba(61, 46, 30, .12)
}

[data-theme="sepia"] .ebook-page-slider::-webkit-slider-thumb {
    background: #8b5a2b;
    border-color: #f5eedc
}

[data-theme="sepia"] .ebook-page-slider::-moz-range-thumb {
    background: #8b5a2b;
    border-color: #f5eedc
}

[data-theme="sepia"] .ebook-page-counter {
    color: #6b5a48
}

/* Theme: Dark (Elevated card on dark surface) */
[data-theme="dark"] .ebook-reader-wrap {
    background: #121225
}

[data-theme="dark"] .ebook-content {
    background: #252540;
    color: #dcdce0;
    box-shadow: 0 2px 16px rgba(0, 0, 0, .3), 0 0 0 1px rgba(255, 255, 255, .05)
}

[data-theme="dark"] .ebook-header,
[data-theme="dark"] .ebook-footer,
[data-theme="dark"] .ebook-toc,
[data-theme="dark"] .ebook-tts-controls {
    background-color: rgba(26, 26, 46, .95);
    border-color: rgba(255, 255, 255, .1);
    color: #e8e8ec;
    backdrop-filter: blur(12px)
}

[data-theme="dark"] .ebook-footer-btn {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-footer-btn:hover {
    background: rgba(255, 255, 255, .08);
    color: #fff
}

[data-theme="dark"] .ebook-page-slider {
    background: rgba(255, 255, 255, .1)
}

[data-theme="dark"] .ebook-page-slider::-webkit-slider-thumb {
    background: #7bc47a;
    border-color: #252540
}

[data-theme="dark"] .ebook-page-slider::-moz-range-thumb {
    background: #7bc47a;
    border-color: #252540
}

[data-theme="dark"] .ebook-page-counter {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-content h2,
[data-theme="dark"] .ebook-content h3,
[data-theme="dark"] .ebook-content h4 {
    color: #f5f5f7
}

[data-theme="dark"] .ebook-content blockquote {
    background: rgba(255, 255, 255, .05);
    border-left-color: #7bc47a;
    color: #c8c8cc
}

[data-theme="dark"] .ebook-content a {
    color: #7bc47a
}

[data-theme="dark"] .ebook-title {
    color: #f5f5f7
}

[data-theme="dark"] .ebook-ctrl-btn,
[data-theme="dark"] .ebook-tts-btn,
[data-theme="dark"] .ebook-back-link {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-ctrl-btn:hover,
[data-theme="dark"] .ebook-tts-btn:hover,
[data-theme="dark"] .ebook-back-link:hover {
    background: rgba(255, 255, 255, .08);
    color: #fff
}

[data-theme="dark"] .ebook-ctrl-btn.is-active {
    background: #7bc47a;
    color: #1a1a2e
}

[data-theme="dark"] .ebook-tts-btn.is-active {
    background: #7bc47a;
    border-color: #7bc47a;
    color: #1a1a2e
}

[data-theme="dark"] .ebook-toc-link {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-toc-link:hover {
    background: rgba(255, 255, 255, .05);
    color: #e8e8ec
}

[data-theme="dark"] .ebook-toc-title {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-toc-item.is-active>.ebook-toc-link {
    background: linear-gradient(90deg, rgba(123, 196, 122, .15), transparent);
    color: #7bc47a;
    border-left-color: #7bc47a
}

[data-theme="dark"] .ebook-toc-item.is-active .ebook-toc-number {
    background: #7bc47a;
    color: #1a1a2e
}

[data-theme="dark"] .ebook-toc-number {
    background: rgba(255, 255, 255, .08);
    color: #b0b0b8
}

[data-theme="dark"] .ebook-toc-sublink {
    color: #8e8e96
}

[data-theme="dark"] .ebook-toc-sublink:hover,
[data-theme="dark"] .ebook-toc-sublink.is-active {
    color: #7bc47a
}

[data-theme="dark"] .tts-sentence.tts-active {
    background-color: rgba(123, 196, 122, .15);
    box-shadow: 0 0 0 3px rgba(123, 196, 122, .08)
}

[data-theme="dark"] .ebook-gate-card {
    background: #1a1a2e;
    border-color: rgba(255, 255, 255, .1);
    box-shadow: 0 8px 32px rgba(0, 0, 0, .4)
}

[data-theme="dark"] .ebook-gate-card h2 {
    color: #f5f5f7
}

[data-theme="dark"] .ebook-gate-card p {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-nav-btn {
    border-color: rgba(255, 255, 255, .12);
    color: #e8e8ec
}

[data-theme="dark"] .ebook-nav-btn:hover {
    background: rgba(255, 255, 255, .08)
}

[data-theme="dark"] .ebook-nav-btn:disabled {
    color: #6b6b74;
    border-color: rgba(255, 255, 255, .06)
}

[data-theme="dark"] .ebook-chapter-indicator {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-tts-speed {
    background: #252540;
    border-color: rgba(255, 255, 255, .12);
    color: #e8e8ec
}

[data-theme="dark"] .ebook-tts-speed-label {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-progress {
    background: rgba(255, 255, 255, .06)
}

[data-theme="dark"] .ebook-spinner {
    border-color: rgba(255, 255, 255, .1);
    border-top-color: #7bc47a
}

[data-theme="dark"] .ebook-content-loading {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-toc-header {
    border-bottom-color: rgba(255, 255, 255, .08)
}

[data-theme="dark"] .ebook-toc-close {
    color: #b0b0b8
}

[data-theme="dark"] .ebook-toc-close:hover {
    background: rgba(255, 255, 255, .08);
    color: #fff
}

[data-theme="dark"] .ebook-content::before {
    background: linear-gradient(to right, rgba(0, 0, 0, .15), transparent)
}

[data-theme="dark"] .ebook-content::after {
    background: linear-gradient(to left, rgba(0, 0, 0, .15), transparent)
}

.ebook-toc-backdrop {
    display: none
}

/* Badge on product page */
.ebook-badge-wrap {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
    padding: .875rem 1.25rem;
    border-radius: var(--radius-lg, 12px);
    background: linear-gradient(135deg, rgba(91, 140, 90, .08), rgba(232, 163, 23, .06));
    border: 1px solid rgba(91, 140, 90, .15)
}

.ebook-badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .375rem .875rem;
    border-radius: var(--radius-full, 999px);
    background: linear-gradient(135deg, var(--palm-leaf, #5b8c5a), #4a7c49);
    color: #fff;
    font-size: .8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .03em;
    white-space: nowrap
}

.btn-ebook-read {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem 1.25rem;
    border-radius: var(--radius-md, 8px);
    background: var(--palm-leaf, #5b8c5a);
    color: #fff;
    font-size: .85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--reader-transition);
    margin-left: auto
}

.btn-ebook-read:hover {
    background: #4a7c49;
    transform: translateX(2px);
    color: #fff
}

/* "Try eBook Sample" button on product page */
.btn-ebook-sample {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .5rem 1.25rem;
    border-radius: var(--radius-md, 8px);
    background: transparent;
    color: var(--palm-leaf, #5b8c5a);
    font-size: .85rem;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--reader-transition);
    margin-left: auto;
    border: 1.5px solid var(--palm-leaf, #5b8c5a)
}

.btn-ebook-sample:hover {
    background: var(--palm-leaf, #5b8c5a);
    color: #fff;
    transform: translateX(2px)
}

/* Sample banner */
.ebook-sample-banner {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1200;
    background: linear-gradient(135deg, var(--palm-leaf, #5b8c5a), #4a7c49);
    color: #fff;
    padding: .5rem 1rem;
    font-size: .8rem;
    font-weight: 600;
    text-align: center
}

.ebook-sample-banner-inner {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .75rem;
    max-width: 800px;
    margin: 0 auto;
    flex-wrap: wrap
}

.ebook-sample-buy-btn {
    padding: .375rem 1rem;
    font-size: .75rem;
    border-radius: var(--radius-full, 999px);
    background: #fff;
    color: var(--palm-leaf, #5b8c5a);
    font-weight: 700;
    text-decoration: none;
    transition: all .2s ease
}

.ebook-sample-buy-btn:hover {
    background: #f0f0f0;
    transform: scale(1.03);
    color: #3a6a39
}

/* Sample tag in header title */
.ebook-sample-tag {
    display: inline-block;
    padding: .125rem .5rem;
    font-size: .625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    background: rgba(91, 140, 90, .15);
    color: var(--palm-leaf, #5b8c5a);
    border-radius: var(--radius-sm, 4px);
    vertical-align: middle;
    margin-left: .375rem
}

[data-theme="dark"] .ebook-sample-tag {
    background: rgba(123, 196, 122, .2);
    color: #7bc47a
}

[data-theme="dark"] .ebook-sample-banner {
    background: linear-gradient(135deg, #2a5a29, #1a401a)
}

[data-theme="sepia"] .ebook-sample-tag {
    background: rgba(139, 90, 43, .15);
    color: #8b5a2b
}

[data-theme="sepia"] .ebook-sample-banner {
    background: linear-gradient(135deg, #8b6914, #6b5410)
}

/* Sample mode: offset fixed elements below the banner */
[data-sample-mode="1"] .ebook-header {
    top: 36px
}

[data-sample-mode="1"] .ebook-progress {
    top: 36px
}