/* E-book detail — aligns with auth / home / upload / search visual system */
:root {
    --ed-ink: #15261a;
    --ed-forest: #205A28;
    --ed-forest-deep: #163f1c;
    --ed-sage: #4a7a52;
    --ed-mist: #e8eee8;
    --ed-paper: #f6f7f4;
    --ed-line: rgba(21, 38, 26, 0.12);
    --ed-gold: #b08d3e;
    --ed-danger: #9b2c2c;
    --ed-ok: #1f6b3a;
    --ed-font-display: "Literata", "Noto Serif SC", "Songti SC", Georgia, serif;
    --ed-font-ui: "Manrope", "Noto Sans SC", "PingFang SC", "Segoe UI", sans-serif;
}

@keyframes edFadeUp {
    from { opacity: 0; transform: translateY(12px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes edDrift {
    0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
    50% { transform: translate3d(1%, -0.6%, 0) scale(1.02); }
}

@keyframes fabFadeIn {
    from { opacity: 0; transform: translateY(20px) scale(0.8); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

@media (prefers-reduced-motion: reduce) {
    .ebook-detail-page *,
    .ebook-detail-page *::before,
    .ebook-detail-page *::after {
        animation: none !important;
        transition: none !important;
    }
}

body.ebook-detail-page {
    margin: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    font-family: var(--ed-font-ui);
    color: var(--ed-ink);
    background: var(--ed-paper);
}

/* —— Compact atmospheric hero —— */
.ed-hero {
    position: relative;
    overflow: hidden;
    color: #f4f7f4;
    background:
        linear-gradient(155deg, rgba(22, 63, 28, 0.94) 0%, rgba(21, 38, 26, 0.9) 50%, rgba(32, 90, 40, 0.88) 100%),
        radial-gradient(90% 60% at 88% 12%, rgba(176, 141, 62, 0.18), transparent 50%),
        linear-gradient(135deg, #1a3d22 0%, #0f1f14 100%);
    padding: clamp(1.35rem, 2.8vw, 2.1rem) 0 clamp(1.15rem, 2.4vw, 1.75rem);
    animation: edFadeUp 0.5s ease both;
}

.ed-hero::before {
    content: "";
    position: absolute;
    inset: -5%;
    background:
        repeating-linear-gradient(
            90deg,
            transparent 0,
            transparent 44px,
            rgba(255, 255, 255, 0.03) 44px,
            rgba(255, 255, 255, 0.03) 48px,
            transparent 48px,
            transparent 80px,
            rgba(176, 141, 62, 0.06) 80px,
            rgba(176, 141, 62, 0.06) 84px
        );
    animation: edDrift 22s ease-in-out infinite;
    pointer-events: none;
}

.ed-hero-inner {
    position: relative;
    z-index: 1;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 0.75rem;
}

@media (min-width: 992px) {
    .ed-hero-inner {
        padding: 0 1rem;
    }
}

.ed-hero-kicker {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: rgba(244, 247, 244, 0.68);
    margin-bottom: 0.45rem;
}

.ed-hero-title {
    font-family: var(--ed-font-display);
    font-size: clamp(1.45rem, 2.8vw, 2.1rem);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    color: #fff;
    margin: 0 0 0.45rem;
    max-width: 52rem;
}

.ed-hero-title a {
    color: inherit;
    text-decoration: none;
}

.ed-hero-title a:hover {
    color: rgba(255, 255, 255, 0.92);
}

.ed-hero-support {
    font-size: 0.9rem;
    line-height: 1.5;
    color: rgba(244, 247, 244, 0.78);
    margin: 0;
    max-width: 40rem;
}

.ed-hero-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem 0.85rem;
    margin-top: 0.75rem;
    font-size: 0.8125rem;
    color: rgba(244, 247, 244, 0.72);
}

.ed-hero-meta a {
    color: rgba(244, 247, 244, 0.9);
    text-decoration: none;
    border-bottom: 1px solid rgba(176, 141, 62, 0.45);
}

.ed-hero-meta a:hover {
    color: #fff;
    border-bottom-color: var(--ed-gold);
}

.ed-hero-meta-sep {
    opacity: 0.35;
}

.ed-hero-chip {
    display: inline-flex;
    align-items: center;
    padding: 0.12rem 0.45rem;
    border: 1px solid rgba(244, 247, 244, 0.22);
    background: rgba(8, 16, 10, 0.22);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    color: rgba(244, 247, 244, 0.88);
}

/* —— Dense shell —— */
.ebook-detail-shell.main-content {
    flex: 1;
    max-width: 1600px;
    margin-left: auto;
    margin-right: auto;
    padding: 1rem 0.75rem 1.5rem;
    width: 100%;
    animation: edFadeUp 0.55s 0.06s ease both;
}

@media (min-width: 992px) {
    .ebook-detail-shell.main-content {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .ebook-detail-shell .row > .ebook-detail-sidebar {
        flex: 0 0 22%;
        max-width: 22%;
    }

    .ebook-detail-shell .row > .ebook-detail-main {
        flex: 0 0 78%;
        max-width: 78%;
    }
}

@media (min-width: 1400px) {
    .ebook-detail-shell .row > .ebook-detail-sidebar {
        flex: 0 0 260px;
        max-width: 260px;
        width: 260px;
    }

    .ebook-detail-shell .row > .ebook-detail-main {
        flex: 1 1 0;
        max-width: none;
        width: auto;
    }
}

.ebook-detail-page .alert {
    border: none;
    border-radius: 0;
    border-left: 3px solid transparent;
    box-shadow: none;
    font-size: 0.9rem;
}

.ebook-detail-page .alert-success {
    background: #eef7f1;
    color: var(--ed-ok);
    border-left-color: var(--ed-ok);
}

.ebook-detail-page .alert-danger {
    background: #faf0f0;
    color: var(--ed-danger);
    border-left-color: var(--ed-danger);
}

.ebook-detail-page .alert-info {
    background: rgba(32, 90, 40, 0.06);
    color: var(--ed-ink);
    border-left-color: var(--ed-forest);
}

.ebook-detail-page .alert-warning {
    background: rgba(176, 141, 62, 0.1);
    color: #6b5420;
    border-left-color: var(--ed-gold);
}

/* Toolbar: breadcrumb + nav */
.ebook-detail-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.65rem 1rem;
    margin-bottom: 0.85rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--ed-line);
}

.ebook-detail-breadcrumb-row {
    flex: 1 1 auto;
    min-width: 0;
}

.ebook-detail-breadcrumb-row .breadcrumb {
    --bs-breadcrumb-margin-bottom: 0;
    margin: 0;
    font-size: 0.8125rem;
    background: transparent;
    padding: 0;
}

.ebook-detail-breadcrumb-row .breadcrumb-item a {
    color: var(--ed-forest);
    text-decoration: none;
}

.ebook-detail-breadcrumb-row .breadcrumb-item a:hover {
    color: var(--ed-forest-deep);
    text-decoration: underline;
}

.ebook-detail-breadcrumb-row .breadcrumb-item.active {
    color: rgba(21, 38, 26, 0.55);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 28rem;
}

.ebook-detail-breadcrumb-share {
    border-radius: 0 !important;
    border-color: var(--ed-forest) !important;
    color: var(--ed-forest) !important;
    font-weight: 600;
    font-size: 0.8125rem;
    white-space: nowrap;
}

.ebook-detail-breadcrumb-share:hover {
    background: var(--ed-forest) !important;
    color: #fff !important;
}

.ebook-detail-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    width: 100%;
    flex-wrap: nowrap;
    margin-bottom: 1rem;
}

.ebook-detail-nav-prev,
.ebook-detail-nav-next {
    flex: 0 0 auto;
    min-width: 0;
}

.ebook-detail-nav-next {
    margin-left: auto;
    text-align: right;
}

.ebook-detail-nav-link {
    display: inline-flex;
    align-items: center;
    font-size: 0.8125rem;
    font-weight: 500;
    line-height: 1.2;
    padding: 0.28rem 0.6rem;
    border-radius: 0;
    text-decoration: none;
    color: var(--ed-forest);
    background: rgba(32, 90, 40, 0.05);
    border: 1px solid rgba(32, 90, 40, 0.14);
    letter-spacing: 0.01em;
    white-space: nowrap;
    transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.ebook-detail-nav-link:hover {
    color: var(--ed-forest-deep);
    background: rgba(32, 90, 40, 0.1);
    border-color: rgba(32, 90, 40, 0.28);
    text-decoration: none;
}

.ebook-detail-nav-link.is-disabled {
    color: rgba(21, 38, 26, 0.35);
    background: rgba(21, 38, 26, 0.03);
    border-color: var(--ed-line);
    cursor: not-allowed;
    pointer-events: none;
}

/* Panels — dense, flat, no card chrome */
.ebook-detail-page .card {
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
    overflow: visible;
}

.ebook-detail-page .ebook-detail-main > .card,
.ebook-detail-page .ebook-detail-sidebar > .card.stats-card,
.ebook-detail-page .ebook-detail-sidebar > .card.author-info,
.ebook-detail-page #recommended-books-section > .card,
.ebook-detail-page .ebook-community-card {
    background: #fff;
    border: 1px solid var(--ed-line);
}

.ebook-detail-page .ebook-detail-sidebar > .card:has(.action-buttons) {
    background: transparent;
    border: none;
}

.ebook-detail-page .spinner-border.text-primary {
    color: var(--ed-forest) !important;
}

.ebook-detail-page .ebook-detail-main > .card {
    margin-bottom: 0.75rem !important;
}

.ebook-detail-page .ebook-detail-main > .card > .card-body {
    padding: 1.1rem 1.15rem;
}

@media (min-width: 992px) {
    .ebook-detail-page .ebook-detail-main > .card > .card-body {
        padding: 1.25rem 1.35rem;
    }
}

.ebook-detail-page .ebook-detail-sidebar > .card.mb-4 {
    margin-bottom: 0.75rem !important;
}

.ebook-detail-page .card-title,
.ebook-detail-page .ebook-detail-main h5,
.ebook-detail-page .ebook-preview-card .card-header h5,
.ebook-detail-page #recommended-books-section h5 {
    font-family: var(--ed-font-display);
    font-weight: 600;
    color: var(--ed-ink);
}

.ebook-detail-page .btn {
    border-radius: 0;
    font-weight: 500;
    box-shadow: none !important;
    transform: none !important;
}

.ebook-detail-page .btn:hover {
    transform: none !important;
    box-shadow: none !important;
}

.ebook-detail-page .btn-primary {
    background: var(--ed-forest);
    border-color: var(--ed-forest);
    color: #fff;
}

.ebook-detail-page .btn-primary:hover {
    background: var(--ed-forest-deep);
    border-color: var(--ed-forest-deep);
    color: #fff;
}

.ebook-detail-page .btn-success {
    background: rgba(32, 90, 40, 0.08);
    border: 1px solid rgba(32, 90, 40, 0.22);
    color: var(--ed-forest);
}

.ebook-detail-page .btn-success:hover {
    background: rgba(32, 90, 40, 0.14);
    border-color: rgba(32, 90, 40, 0.35);
    color: var(--ed-forest-deep);
}

.ebook-detail-page .btn-outline-primary,
.ebook-detail-page .btn-outline-success,
.ebook-detail-page .btn-outline-secondary,
.ebook-detail-page .btn-outline-info {
    border-color: var(--ed-line);
    color: var(--ed-forest);
    background: transparent;
}

.ebook-detail-page .btn-outline-primary:hover,
.ebook-detail-page .btn-outline-success:hover,
.ebook-detail-page .btn-outline-secondary:hover,
.ebook-detail-page .btn-outline-info:hover {
    background: rgba(32, 90, 40, 0.08);
    border-color: var(--ed-forest);
    color: var(--ed-forest-deep);
}

.ebook-detail-page .btn-warning {
    background: rgba(176, 141, 62, 0.1);
    border: 1px solid rgba(176, 141, 62, 0.35);
    color: #6b5420;
}

.ebook-detail-page .btn-warning:hover {
    background: rgba(176, 141, 62, 0.18);
    border-color: var(--ed-gold);
    color: #4a3a14;
}

.ebook-detail-page .btn-outline-warning {
    border-color: rgba(176, 141, 62, 0.4);
    color: #6b5420;
}

.ebook-detail-page .btn-outline-warning:hover {
    background: rgba(176, 141, 62, 0.12);
    color: #4a3a14;
}

.ebook-detail-page .btn-secondary {
    background: transparent;
    border: 1px solid var(--ed-line);
    color: rgba(21, 38, 26, 0.7);
}

.ebook-detail-page .btn-secondary:hover {
    background: var(--ed-mist);
    color: var(--ed-ink);
}

.ebook-detail-page .form-control,
.ebook-detail-page .form-select {
    border-radius: 0;
    border: 1px solid var(--ed-line);
    border-bottom-width: 2px;
}

.ebook-detail-page .form-control:focus,
.ebook-detail-page .form-select:focus {
    border-color: var(--ed-forest);
    box-shadow: none;
}

/* Cover */
.ebook-cover {
    width: 100%;
    aspect-ratio: 3 / 4;
    background: var(--ed-mist);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--ed-sage);
    font-size: 4rem;
    border-radius: 0 4px 4px 0;
    border-left: none;
    position: relative;
    overflow: hidden;
    box-shadow:
        6px 8px 20px rgba(21, 38, 26, 0.1),
        2px 0 0 rgba(21, 38, 26, 0.04),
        0 2px 6px rgba(21, 38, 26, 0.05);
    transition: opacity 0.2s ease;
}

.ebook-cover::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: linear-gradient(90deg, #c5cfc6 0%, #e4ebe4 50%, #c5cfc6 100%);
    z-index: 3;
    pointer-events: none;
}

.ebook-cover::after {
    content: "";
    position: absolute;
    left: 5px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(90deg, rgba(21, 38, 26, 0.15) 0%, transparent 100%);
    z-index: 2;
    pointer-events: none;
}

.ebook-cover:hover {
    opacity: 0.94;
}

.ebook-cover.downloaded {
    border: 2px solid var(--ed-forest);
    box-sizing: border-box;
}

.ebook-cover .downloaded-badge {
    position: absolute;
    bottom: 0.35rem;
    right: 0.35rem;
    background: var(--ed-forest);
    color: #fff;
    padding: 0.15rem 0.5rem;
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    line-height: 1.2;
    z-index: 5;
    border-radius: 0;
}

.ebook-cover-link {
    display: block;
    width: 100%;
    height: 100%;
    cursor: pointer;
    text-decoration: none;
}

.ebook-cover-link:hover {
    opacity: 0.97;
}

.ebook-cover img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    position: relative;
    z-index: 1;
}

.default-cover {
    background: var(--ed-mist);
    color: var(--ed-sage);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 20px;
    position: relative;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.default-cover::before {
    display: none;
}

.default-cover .book-icon {
    font-size: 3.5rem;
    margin-bottom: 12px;
}

.default-cover .book-title {
    font-family: var(--ed-font-display);
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 6px;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--ed-ink);
}

.default-cover .book-author {
    font-size: 0.9rem;
    opacity: 0.85;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.detail-cover-favorite-btn {
    position: absolute !important;
    top: 8px !important;
    right: 8px !important;
    z-index: 10 !important;
    border-radius: 0 !important;
    width: 28px !important;
    height: 28px !important;
    padding: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    box-shadow: none !important;
    background: rgba(255, 255, 255, 0.92) !important;
    border: 1px solid var(--ed-line) !important;
    color: var(--ed-danger) !important;
}

.detail-cover-favorite-btn.btn-danger {
    background: var(--ed-danger) !important;
    border-color: var(--ed-danger) !important;
    color: #fff !important;
}

/* Stats / author */
.stats-card {
    background: #fff;
    color: var(--ed-ink);
    text-align: center;
    border: 1px solid var(--ed-line) !important;
}

.stats-card .card-body {
    padding: 1rem 0.85rem !important;
}

.stats-card .card-title {
    font-size: 0.875rem;
    margin-bottom: 0.75rem !important;
}

.stats-card .h4 {
    font-family: var(--ed-font-display);
    color: var(--ed-forest);
    font-size: 1.25rem;
}

.stats-card small {
    font-size: 0.72rem;
    color: rgba(21, 38, 26, 0.55);
}

.author-info {
    background: #fff;
    border: 1px solid var(--ed-line) !important;
}

.author-info .card-body {
    padding: 1rem 1rem !important;
}

.author-info .card-title {
    font-size: 0.875rem;
}

.author-link,
.publisher-link {
    color: var(--ed-forest);
    transition: color 0.15s ease;
}

.author-link:hover,
.publisher-link:hover {
    color: var(--ed-forest-deep);
    text-decoration: underline;
}

.default-cover .author-link {
    color: inherit;
}

/* Actions — dense sidebar */
.action-buttons {
    padding: 0.85rem !important;
    background: #fff;
    border: 1px solid var(--ed-line);
}

.action-buttons .btn {
    margin-bottom: 0.4rem;
    padding: 0.65rem 0.85rem;
    font-weight: 500;
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.45rem;
}

.action-group .btn:last-child {
    margin-bottom: 0;
}

.action-buttons .btn i {
    font-size: 1rem;
    flex-shrink: 0;
}

.action-group-primary {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.action-group-primary > .btn {
    margin-bottom: 0 !important;
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 0;
}

.action-group-primary > .btn-primary {
    background: var(--ed-forest);
    border: 1px solid var(--ed-forest);
    color: #fff;
}

.action-group-primary > .btn-primary:hover {
    background: var(--ed-forest-deep);
    border-color: var(--ed-forest-deep);
    color: #fff;
}

.action-group-primary > .btn-success {
    background: rgba(32, 90, 40, 0.06);
    border: 1px solid rgba(32, 90, 40, 0.22);
    color: var(--ed-forest);
}

.action-group-primary > .btn-success:hover {
    background: rgba(32, 90, 40, 0.12);
    border-color: rgba(32, 90, 40, 0.35);
    color: var(--ed-forest-deep);
}

.action-group-primary > .btn-warning {
    background: rgba(176, 141, 62, 0.1);
    border: 1px solid rgba(176, 141, 62, 0.35);
    color: #6b5420;
}

.action-group-primary > .btn-warning:hover {
    background: rgba(176, 141, 62, 0.18);
    border-color: var(--ed-gold);
    color: #4a3a14;
}

.action-group-primary > .btn-warning i {
    color: var(--ed-gold);
}

.action-group-primary + .action-group-secondary {
    border-top: 1px solid var(--ed-line);
    padding-top: 0.65rem;
    margin-top: 0.65rem;
}

.action-group-title {
    display: none;
}

.action-group-secondary .btn {
    margin-bottom: 0.1rem;
    padding: 0.55rem 0.4rem;
    justify-content: flex-start;
    font-weight: 400;
    font-size: 0.875rem;
    color: rgba(21, 38, 26, 0.78);
    background: transparent;
    border-radius: 0;
    border: none;
}

.action-group-secondary .btn:hover {
    background: var(--ed-mist);
}

.action-group-secondary .btn-danger {
    justify-content: flex-start;
    background: transparent;
    color: var(--ed-danger);
}

.action-group-secondary .btn-danger i {
    color: var(--ed-danger);
}

.action-group-secondary .btn-danger:hover {
    background: #faf0f0;
}

.action-group-secondary .btn-outline-danger,
.action-group-secondary .btn-outline-warning,
.action-group-secondary .btn-outline-info,
.action-group-secondary .btn-outline-primary {
    border: none;
    background: transparent;
}

.action-group-secondary .btn-outline-danger { color: rgba(21, 38, 26, 0.78); }
.action-group-secondary .btn-outline-danger i { color: var(--ed-danger); }
.action-group-secondary .btn-outline-danger:hover { background: #faf0f0; color: var(--ed-ink); }

.action-group-secondary .btn-outline-warning { color: rgba(21, 38, 26, 0.78); }
.action-group-secondary .btn-outline-warning i { color: var(--ed-gold); }
.action-group-secondary .btn-outline-warning:hover,
.action-group-secondary .btn-warning {
    background: rgba(176, 141, 62, 0.08);
    color: var(--ed-ink);
    border: none;
}

.action-group-secondary .btn-warning i { color: var(--ed-gold); }

.action-group-secondary .btn-outline-info { color: rgba(21, 38, 26, 0.78); }
.action-group-secondary .btn-outline-info i { color: var(--ed-sage); }
.action-group-secondary .btn-outline-info:hover { background: var(--ed-mist); color: var(--ed-ink); }

.action-group-secondary .btn-outline-primary { color: rgba(21, 38, 26, 0.78); }
.action-group-secondary .btn-outline-primary i { color: var(--ed-forest); }
.action-group-secondary .btn-outline-primary:hover { background: var(--ed-mist); color: var(--ed-ink); }

.action-group-secondary .btn-support-author { color: rgba(21, 38, 26, 0.78); }
.action-group-secondary .btn-support-author i { color: var(--ed-gold); }
.action-group-secondary .btn-support-author:hover { background: rgba(176, 141, 62, 0.08); color: var(--ed-ink); }

.action-buttons .alert {
    border-radius: 0;
    border: none;
    border-left: 3px solid var(--ed-forest);
    padding: 0.85rem;
    margin-bottom: 0.5rem;
    background: rgba(32, 90, 40, 0.04);
    color: var(--ed-ink);
}

.action-buttons .alert .btn-sm {
    padding: 0.4rem 0.75rem;
    font-size: 0.8125rem;
    border-radius: 0;
}

.action-group {
    margin-bottom: 0;
}

/* Main identity block */
.ebook-detail-identity {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.65rem;
    margin-bottom: 0.5rem;
}

.ebook-detail-identity .book-title-link,
.ebook-detail-identity .book-title-text {
    font-family: var(--ed-font-display);
    font-size: clamp(1.25rem, 2vw, 1.55rem);
    font-weight: 600;
    line-height: 1.25;
    color: var(--ed-ink);
    text-decoration: none;
}

.ebook-detail-identity .book-title-link:hover {
    color: var(--ed-forest);
}

.ebook-detail-author {
    font-size: 0.95rem;
    color: rgba(21, 38, 26, 0.62);
    margin-bottom: 0.65rem !important;
}

.ebook-detail-desc {
    font-size: 0.925rem;
    line-height: 1.6;
    color: rgba(21, 38, 26, 0.82);
    margin-bottom: 0.85rem !important;
}

.category-badge {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    margin-top: 0.15rem;
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 1.2;
    padding: 0.18rem 0.5rem;
    border-radius: 0;
    color: var(--ed-forest);
    background: rgba(32, 90, 40, 0.07);
    border: 1px solid rgba(32, 90, 40, 0.16);
    letter-spacing: 0.03em;
    white-space: nowrap;
    text-decoration: none;
}

a.category-badge:hover {
    color: var(--ed-forest-deep);
    background: rgba(32, 90, 40, 0.12);
    border-color: rgba(32, 90, 40, 0.28);
    text-decoration: none;
}

.category-badge-muted {
    color: rgba(21, 38, 26, 0.5);
    background: rgba(21, 38, 26, 0.04);
    border: 1px solid var(--ed-line);
}

.meta-info {
    color: rgba(21, 38, 26, 0.58);
    font-size: 0.8125rem;
    row-gap: 0.35rem;
}

.meta-info strong {
    color: rgba(21, 38, 26, 0.72);
    font-weight: 600;
}

/* AI panel */
.ebook-ai-panel {
    border: 1px solid var(--ed-line);
    border-radius: 0;
    padding: 0.85rem 1rem;
    background: linear-gradient(180deg, rgba(32, 90, 40, 0.04) 0%, #fff 100%);
    margin-bottom: 0.85rem;
}

.ebook-ai-panel h5 {
    font-family: var(--ed-font-display);
    color: var(--ed-forest);
    font-weight: 600;
    font-size: 1.05rem;
}

.ebook-ai-summary {
    white-space: pre-wrap;
    line-height: 1.7;
    color: var(--ed-ink);
    font-size: 0.925rem;
}

.ebook-ai-highlight-item {
    padding: 0.65rem 0;
    border-bottom: 1px dashed var(--ed-line);
}

.ebook-ai-highlight-item:last-child {
    border-bottom: none;
}

.ebook-ai-highlight-label {
    font-weight: 600;
    color: var(--ed-forest);
    margin-bottom: 0.3rem;
    font-size: 0.875rem;
}

.ebook-ai-highlight-excerpt {
    color: rgba(21, 38, 26, 0.7);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 0.3rem;
}

.ebook-ai-highlight-link {
    font-size: 0.8125rem;
}

.ebook-ai-answer {
    background: var(--ed-mist);
    border-radius: 0;
    padding: 0.7rem 0.9rem;
    line-height: 1.55;
    font-size: 0.9rem;
}

/* Tags */
.ebook-detail-page .tag-badge {
    border-radius: 0;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.02em;
}

.ebook-detail-page .badge.bg-primary {
    background: rgba(32, 90, 40, 0.1) !important;
    color: var(--ed-forest) !important;
    border: 1px solid rgba(32, 90, 40, 0.18);
}

.ebook-detail-page .badge.bg-success {
    background: rgba(32, 90, 40, 0.14) !important;
    color: var(--ed-forest-deep) !important;
    border: 1px solid rgba(32, 90, 40, 0.22);
}

.ebook-detail-page .badge.bg-secondary {
    background: var(--ed-mist) !important;
    color: rgba(21, 38, 26, 0.65) !important;
}

/* Donation */
.donation-card {
    background: #fff !important;
    border: 1px solid var(--ed-line) !important;
    color: rgba(21, 38, 26, 0.65);
}

.donation-list {
    max-height: 200px;
    overflow-y: auto;
}

.donation-item {
    border-left: 2px solid var(--ed-line);
    background: transparent;
    border-radius: 0 !important;
}

.donation-item:hover {
    background-color: var(--ed-mist);
}

.quick-amount-btn.active {
    background-color: var(--ed-forest);
    border-color: var(--ed-forest);
    color: #fff;
}

/* Preview */
.ebook-preview-card .card-header {
    background: transparent !important;
    border: none !important;
    border-bottom: 1px solid var(--ed-line) !important;
    padding: 0.65rem 1.15rem !important;
}

.ebook-preview-card .card-body {
    padding: 0.75rem 1.15rem !important;
}

.ebook-preview-card .alert {
    margin-bottom: 0.75rem !important;
    padding: 0.65rem 0.85rem;
}

.preview-content {
    width: 100% !important;
    max-width: 100% !important;
}

.preview-content .page-content {
    max-width: 100% !important;
    word-break: break-word;
    width: 100%;
    padding: 0;
    margin: 0;
    text-align: left;
    color: var(--ed-ink);
    font-size: 0.9rem;
    line-height: 1.7;
}

.card-body .preview-content {
    margin-left: 0;
    margin-right: 0;
    padding: 0.35rem 0 !important;
    text-align: left;
    max-height: min(32vh, 320px) !important;
    overflow-y: auto;
}

@media (min-width: 1200px) {
    .card-body .preview-content {
        max-height: min(36vh, 380px) !important;
    }
}

.preview-content .preview-page {
    margin-bottom: 1.25rem;
    padding-bottom: 1.25rem;
}

.preview-content .page-header {
    text-align: left;
    margin-bottom: 0.55rem;
}

.card-body .preview-footer {
    margin: 0;
    padding: 0 !important;
    text-align: left;
}

/* Recommendations */
.ebooks-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1.25rem;
    margin-bottom: 0;
    width: 100%;
    box-sizing: border-box;
}

@media (min-width: 1200px) {
    .ebooks-grid {
        grid-template-columns: repeat(6, minmax(0, 1fr));
    }

    #recommendedBooksContainer.ebooks-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: 1rem;
    }
}

@media (min-width: 1600px) {
    #recommendedBooksContainer.ebooks-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}

@media (min-width: 768px) and (max-width: 1199px) {
    #recommendedBooksContainer.ebooks-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }
}

@media (min-width: 992px) and (max-width: 1199px) {
    .ebooks-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}

@media (max-width: 992px) {
    .ebooks-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .ebooks-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.25rem;
    }
}

@media (max-width: 576px) {
    .ebooks-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }
}

.ebooks-grid .ebook-card {
    background: transparent;
    border: none;
    border-radius: 0;
    overflow: visible;
    box-shadow: none;
    transition: opacity 0.2s ease;
    position: relative;
    text-align: center;
}

.ebooks-grid .ebook-card:hover {
    opacity: 0.85;
}

#recommendedBooksContainer .ebook-cover {
    aspect-ratio: 3/4;
    width: 100%;
    max-width: 180px;
    margin: 0 auto;
    cursor: pointer;
}

#recommendedBooksContainer .ebook-cover img {
    object-fit: cover;
    object-position: center;
}

#recommendedBooksContainer .ebook-cover .default-cover,
#recommendedBooksContainer .ebook-cover span {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.ebooks-grid .ebook-card h3 {
    font-family: var(--ed-font-display);
    font-size: 0.9rem;
    margin: 0.45rem 0;
    color: var(--ed-ink);
    font-weight: 600;
    line-height: 1.35;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.7em;
}

.ebooks-grid .ebook-card p {
    font-size: 0.8rem;
    color: rgba(21, 38, 26, 0.55);
    margin: 0.2rem 0;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ebooks-grid .ebook-card .stats {
    font-size: 0.72rem;
    color: rgba(21, 38, 26, 0.4);
    margin-top: 0.35rem;
}

#recommended-books-section > .card > .card-header {
    background: transparent;
    border-bottom: 1px solid var(--ed-line);
    padding: 0.65rem 1rem;
}

#recommended-books-section > .card > .card-body {
    padding: 0.85rem 1rem;
}

#toggleRecommendedBooksInfo {
    border-radius: 0 !important;
    border: 1px solid var(--ed-line) !important;
    background: #fff !important;
    color: rgba(21, 38, 26, 0.65) !important;
    font-size: 0.8125rem !important;
    padding: 0.25rem 0.65rem !important;
}

/* Community */
.comment-section .card {
    border: none;
    border-radius: 0;
    box-shadow: none;
    background: transparent;
}

.comment-section .card-header {
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--ed-line);
    padding: 0.85rem 0;
    margin-bottom: 0.85rem;
}

.comment-section .card-body {
    padding: 0;
}

.comment-section .comment-input-area {
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--ed-line);
    margin-bottom: 0.85rem;
}

.comment-section .comment-item {
    padding-bottom: 0.65rem;
    border-bottom: 1px solid var(--ed-line);
    margin-bottom: 0.65rem;
}

.comment-section .comment-item:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.comment-section .reply-item {
    padding-left: 0.75rem;
    border-left: 2px solid var(--ed-line);
    margin-left: 0.25rem;
}

.comment-section .alert {
    border-radius: 0;
    border: none;
    border-left: 3px solid var(--ed-forest);
    background: rgba(32, 90, 40, 0.04);
}

.comment-section-embedded .comment-input-area {
    padding-bottom: 0.65rem;
    margin-bottom: 0.65rem;
}

.ebook-community-card {
    border: 1px solid var(--ed-line) !important;
    border-radius: 0 !important;
    overflow: hidden;
    background: #fff !important;
}

.ebook-community-card > .card-header {
    background: rgba(32, 90, 40, 0.03) !important;
    padding: 0 !important;
}

.ebook-community-tabs {
    border-bottom: none;
    gap: 0;
    padding: 0.4rem 0.65rem 0;
}

.ebook-community-tabs .nav-link {
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    color: rgba(21, 38, 26, 0.55);
    font-size: 0.875rem;
    font-weight: 600;
    padding: 0.45rem 0.85rem;
    margin-bottom: -1px;
}

.ebook-community-tabs .nav-link:hover {
    color: var(--ed-forest);
    background: rgba(32, 90, 40, 0.05);
}

.ebook-community-tabs .nav-link.active {
    color: var(--ed-forest);
    background: #fff;
    border-bottom-color: var(--ed-forest);
}

.ebook-community-card > .card-body {
    padding: 1rem 1.15rem !important;
}

.ebook-blog-list .list-group-item {
    padding: 0.65rem 0;
    border-color: var(--ed-line);
}

.ebook-blog-list .blog-item-title {
    font-family: var(--ed-font-display);
    font-size: 0.95rem;
    line-height: 1.35;
}

.ebook-blog-list .blog-item-meta {
    font-size: 0.78rem;
}

.ebook-blog-list .blog-item-summary {
    font-size: 0.82rem;
    line-height: 1.45;
    margin-bottom: 0;
}

.ebook-blog-toolbar {
    display: flex;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

#blog-section.ebook-detail-shell {
    max-width: 1600px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 0.75rem;
    padding-right: 0.75rem;
}

@media (min-width: 992px) {
    #blog-section.ebook-detail-shell {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

/* Modals */
.ebook-detail-page .modal-content {
    border-radius: 0;
    border: 1px solid var(--ed-line);
    box-shadow: 0 16px 48px rgba(21, 38, 26, 0.12);
}

.ebook-detail-page .modal-header {
    border-bottom: 1px solid var(--ed-line);
}

.ebook-detail-page .modal-footer {
    border-top: 1px solid var(--ed-line);
}

.ebook-detail-page .modal-title {
    font-family: var(--ed-font-display);
    font-weight: 600;
}

#shareLinkModal .modal-body {
    padding: 1.75rem;
}

#shareLinkModal #qrcode {
    padding: 0.85rem;
    background: transparent;
    display: inline-block;
}

#shareLinkModal .form-control {
    font-size: 0.875rem;
    word-break: break-all;
}

#alipayQrcode canvas,
#alipayQrcode img {
    border-radius: 0;
    max-width: 200px;
    max-height: 200px;
}

#searchModal .modal-dialog {
    max-width: 600px;
}

#searchModal .modal-content {
    border-radius: 0;
    border: 1px solid var(--ed-line);
    box-shadow: 0 16px 48px rgba(21, 38, 26, 0.14);
}

#searchModal .modal-header {
    border-bottom: 1px solid var(--ed-line);
    padding: 1.25rem 1.35rem;
}

#searchModal .modal-body {
    padding: 1.25rem 1.35rem;
}

#searchModal .form-control {
    border-radius: 0 !important;
    border: 1px solid var(--ed-line) !important;
    border-bottom-width: 2px !important;
}

#searchModal .btn-primary {
    border-radius: 0 !important;
    background: var(--ed-forest) !important;
    border-color: var(--ed-forest) !important;
}

@media (max-width: 576px) {
    #searchModal .modal-dialog,
    #shareLinkModal .modal-dialog {
        margin: 0.75rem;
    }

    #searchModal .input-group {
        flex-direction: column;
    }

    #searchModal .input-group .form-control {
        border-radius: 0 !important;
        margin-bottom: 0.5rem;
    }

    #searchModal .input-group .btn {
        border-radius: 0 !important;
        width: 100%;
    }

    #shareLinkModal .modal-body {
        padding: 1.25rem 1rem;
    }
}

/* FAB */
.floating-action-buttons {
    position: fixed !important;
    bottom: 30px !important;
    right: 30px !important;
    z-index: 99999 !important;
    display: flex !important;
    flex-direction: column;
    gap: 12px;
}

.fab-btn {
    width: 52px !important;
    height: 52px !important;
    border-radius: 0 !important;
    border: none !important;
    cursor: pointer !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    font-size: 1.35rem !important;
    color: white !important;
    box-shadow: 0 4px 14px rgba(21, 38, 26, 0.18) !important;
    transition: background 0.2s ease, opacity 0.2s ease;
    position: relative !important;
    animation: fabFadeIn 0.45s ease forwards;
}

.fab-btn:nth-child(1) { animation-delay: 0.08s; }
.fab-btn:nth-child(2) { animation-delay: 0.16s; }

.fab-btn:hover {
    transform: none !important;
    box-shadow: 0 6px 18px rgba(21, 38, 26, 0.24) !important;
}

.fab-btn-primary {
    background: var(--ed-forest) !important;
}

.fab-btn-primary:hover {
    background: var(--ed-forest-deep) !important;
}

.fab-btn-secondary {
    background: #2a4a32 !important;
}

.fab-btn-secondary:hover {
    background: var(--ed-forest-deep) !important;
}

.fab-btn-primary.hidden {
    opacity: 0 !important;
    pointer-events: none;
}

@media (max-width: 768px) {
    .floating-action-buttons {
        bottom: 18px;
        right: 18px;
        gap: 10px;
    }

    .fab-btn {
        width: 46px !important;
        height: 46px !important;
        font-size: 1.2rem !important;
    }
}