/* Book frontend — Almonji theme tokens, scoped to .bf-* */
.bf-wrap {
    --bf-primary: var(--color-primary);
    --bf-primary-dark: var(--color-primary-dark);
    --bf-text: var(--color-text);
    --bf-muted: var(--color-muted);
    --bf-border: var(--color-border-soft);
    --bf-surface: var(--color-surface);
    --bf-soft: var(--color-accent-soft);
    --bf-toc-width: 240px;
    --bf-reader-max: 42rem;
    max-width: var(--hp-content-width);
    margin: 0 auto;
    padding: 0 0 .5rem;
    color: var(--bf-text);
}

.bf-wrap--landing {
    max-width: 860px;
}

/*
 * Chapter reader only: shrink space under site nav.
 * Do not change global .site-main (lists, landing, other pages).
 * Before: .site-main padding-top 1.75rem (28px) + .site-breadcrumb.mb-3 (16px)
 *         + .bf-reader-header margin-bottom .85rem ≈ large gap to .bf-layout
 */
.site-main.site-main--book-reader,
.site-main:has(> .bf-wrap--reader) {
    padding-top: .55rem;
    padding-bottom: 1.75rem;
}

.bf-wrap--reader > .site-breadcrumb {
    margin-bottom: .45rem !important;
}

.bf-wrap--reader .bf-reader-header {
    margin-bottom: .5rem;
}

.bf-wrap--reader .bf-reader-header__toolbar {
    margin-bottom: 0;
}

.bf-wrap--reader .bf-reader-header__titles {
    margin-top: 0;
}

.bf-wrap--reader .bf-reader-header__chapter {
    margin-top: 0;
}

@media (max-width: 575.98px) {
    .site-main.site-main--book-reader,
    .site-main:has(> .bf-wrap--reader) {
        padding-top: .4rem;
        padding-bottom: 1.35rem;
    }

    .bf-wrap--reader > .site-breadcrumb {
        margin-bottom: .35rem !important;
    }
}

.bf-page-header {
    margin-bottom: 1rem;
}

.bf-page-title {
    margin: 0;
    font-size: clamp(1.25rem, 2.2vw, 1.65rem);
    font-weight: 700;
    color: var(--color-text-strong);
    line-height: 1.35;
}

.bf-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--bf-surface);
    border: 1px solid var(--bf-border);
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.bf-card:hover,
.bf-card:focus-within {
    border-color: var(--color-border);
    box-shadow: 0 10px 24px rgba(20, 1, 133, .08);
}

/* Cover: fixed-height, self-contained; image never stretched or cropped */
.bf-card__cover {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 200px;
    padding: .85rem;
    background: var(--color-surface-soft);
    overflow: hidden;
}

.bf-card__cover img {
    display: block;
    width: auto;
    height: auto;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(15, 23, 42, .12);
}

.bf-card__placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-secondary);
    font-size: 1.6rem;
}

.bf-card__body {
    display: flex;
    flex-direction: column;
    flex: 1 1 auto;
    gap: .45rem;
    padding: .85rem .9rem 1rem;
    min-width: 0;
}

/* Fixed 2-line height keeps every card's title block aligned */
.bf-card__title {
    margin: 0;
    font-size: .92rem;
    font-weight: 700;
    line-height: 1.45;
    min-height: 2.7rem;
}

.bf-card__title a {
    color: var(--color-text-strong);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.bf-card__title a:hover,
.bf-card__title a:focus-visible {
    color: var(--color-primary);
}

.bf-card__author {
    margin: 0;
    font-size: .78rem;
    color: var(--color-text-muted);
}

.bf-card__meta {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
}

.bf-card__meta li {
    font-size: .71rem;
    line-height: 1.4;
    color: var(--color-text-muted);
    background: var(--color-surface-soft);
    border: 1px solid var(--bf-border);
    border-radius: 6px;
    padding: .12rem .45rem;
}

/* Read-only view count (cms_contents.views_count) on book cards, the book detail
   meta, the chapter list (TOC) and the reader chapter header. Scoped to the books
   frontend so nothing else is affected. */
.bf-card .content-list-views,
.bf-book-meta .content-list-views,
.bf-toc-block .content-list-views,
.bf-reader-header__titles .content-list-views {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    font-size: .74rem;
    color: var(--color-text-muted);
}

.bf-book-meta .content-list-views {
    font-size: inherit;
}

/* Chapter list (TOC) entries: compact, muted, shown beside the chapter title. */
.bf-toc-block .content-list-views {
    margin-inline-start: .4rem;
    font-size: .7rem;
    color: var(--bf-muted, #6b7280);
}

/* Reader chapter header: subtle counter under the chapter title. */
.bf-reader-header__titles .content-list-views {
    margin-top: .25rem;
    font-size: .8rem;
}

.bf-card__footer {
    margin-top: auto;
    padding-top: .5rem;
    display: flex;
    flex-direction: column;
    gap: .5rem;
}

.bf-card__cta {
    align-self: flex-start;
    padding: .22rem .7rem !important;
    font-size: .78rem !important;
    font-weight: 600;
    border-radius: 8px;
}

.bf-landing {
    background: var(--bf-surface);
    border: 1px solid var(--bf-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-soft);
    padding: 1rem 1.1rem 1.15rem;
}

.bf-landing__header {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.15rem;
    align-items: flex-start;
    margin-bottom: .85rem;
}

.bf-landing__cover {
    flex: 0 0 7.5rem;
    width: 7.5rem;
    aspect-ratio: 3 / 4;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--bf-border);
    background: var(--color-surface-soft);
}

.bf-landing__cover img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center top;
}

.bf-landing__info {
    flex: 1 1 14rem;
    min-width: 0;
}

.bf-book-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .15rem;
    color: var(--bf-muted);
    font-size: .82rem;
    margin: .4rem 0 .7rem;
}

.bf-dot {
    margin: 0 .2rem;
}

.bf-landing__actions {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}

.bf-landing-bar,
.bf-landing__actions--mobile {
    display: none;
}

.bf-btn {
    font-weight: 600;
    border-radius: 8px;
}

.bf-btn--ghost {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-strong);
}

.bf-btn--ghost:hover,
.bf-btn--ghost:focus {
    background: var(--bf-soft);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.bf-intro {
    margin: 0 0 1rem;
    max-width: 40rem;
}

.bf-section-title {
    font-size: .92rem;
    font-weight: 700;
    color: var(--color-text-strong);
    margin: 0 0 .55rem;
}

.bf-empty {
    color: var(--bf-muted);
    font-size: .9rem;
}

.bf-reader-header {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: .55rem;
    margin-bottom: .85rem;
}

.bf-reader-header__toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: .35rem .75rem;
    padding-bottom: .45rem;
    border-bottom: 1px solid var(--bf-border);
}

.bf-back {
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    font-size: .84rem;
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-link);
    text-decoration: none;
    min-height: 2.5rem;
}

.bf-back__icon--logical {
    font-size: 1.15rem;
    line-height: 1;
}

[dir="rtl"] .bf-back__icon--logical {
    transform: scaleX(-1);
}

.bf-back:hover,
.bf-back:focus-visible {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.bf-toc-toggle {
    display: none;
    align-items: center;
    gap: .35rem;
    margin: 0;
    min-height: 2.5rem;
    padding: .35rem .7rem;
    border: 1px solid var(--bf-border);
    border-radius: var(--radius-sm);
    background: var(--bf-surface);
    color: var(--color-text-strong);
    font-size: .84rem;
    font-weight: 700;
    line-height: 1.2;
    cursor: pointer;
}

.bf-toc-toggle:hover,
.bf-toc-toggle:focus-visible {
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
}

.bf-toc-toggle:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.bf-toc-toggle[aria-expanded="true"] {
    border-color: var(--color-primary);
    background: var(--bf-soft);
}

.bf-reader-header__titles {
    display: flex;
    flex-direction: column;
    gap: .2rem;
    min-width: 0;
}

.bf-reader-header__book {
    margin: 0;
    font-size: .82rem;
    font-weight: 500;
    line-height: 1.4;
    color: var(--bf-muted);
}

.bf-reader-header__heading {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: .55rem .85rem;
    margin: 0;
}

.bf-reader-header__heading .bf-reader-header__chapter {
    margin: 0;
    flex: 1 1 12rem;
    min-width: 0;
}

.bf-reader-header__chapter {
    margin: 0;
    font-size: clamp(1.15rem, 2vw, 1.4rem);
    font-weight: 700;
    color: var(--color-text-strong);
    line-height: 1.35;
    scroll-margin-top: 1rem;
}

@media (min-width: 768px) {
    .bf-reader-header {
        flex-direction: row;
        align-items: flex-start;
        justify-content: space-between;
        gap: .75rem 1.25rem;
    }

    .bf-reader-header__toolbar {
        order: 2;
        flex: 0 0 auto;
        margin-inline-start: auto;
        padding-bottom: 0;
        border-bottom: 0;
    }

    .bf-reader-header__titles {
        order: 1;
        flex: 1 1 auto;
    }
}

.bf-layout {
    display: grid;
    grid-template-columns: var(--bf-toc-width) minmax(0, 1fr);
    gap: 1rem;
    align-items: start;
}

.bf-toc {
    background: var(--bf-surface);
    border: 1px solid var(--bf-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-soft);
    padding: .7rem .65rem;
}

.bf-toc__title {
    font-size: .82rem;
    font-weight: 700;
    margin: 0 .3rem .5rem;
    color: var(--color-text-strong);
}

.bf-toc-nav ul,
.bf-toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.bf-toc-nav li,
.bf-toc-item {
    margin: 0;
}

.bf-toc-link {
    display: flex;
    align-items: flex-start;
    gap: .45rem;
    padding-block: .38rem;
    padding-inline: .5rem .55rem;
    border-radius: 8px;
    border-inline-start: 3px solid transparent;
    color: var(--bf-text);
    text-decoration: none;
    font-size: .86rem;
    line-height: 1.4;
    transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.bf-toc-link:hover,
.bf-toc-link:focus-visible {
    background: var(--bf-soft);
    color: var(--color-primary-dark);
}

.bf-toc-link.is-active {
    background: rgba(12, 160, 230, .12);
    color: var(--color-primary-dark);
    font-weight: 800;
    border-inline-start-color: var(--color-primary);
}

.bf-toc-link.is-active:hover,
.bf-toc-link.is-active:focus-visible {
    background: rgba(12, 160, 230, .18);
    color: var(--color-primary-dark);
}

.bf-toc-link.is-active::after {
    content: "";
    flex: 0 0 .42rem;
    width: .42rem;
    height: .42rem;
    margin-inline-start: auto;
    margin-block-start: .42rem;
    border-radius: 50%;
    background: var(--color-primary);
}

.bf-toc-link.is-active .bf-toc-index {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #fff;
}

.bf-toc-index {
    flex: 0 0 1.35rem;
    width: 1.35rem;
    height: 1.35rem;
    margin-top: .08rem;
    border-radius: 6px;
    border: 1px solid var(--bf-border);
    background: var(--color-surface-soft);
    color: var(--color-primary-dark);
    font-size: .68rem;
    font-weight: 700;
    line-height: 1.25rem;
    text-align: center;
}

.bf-toc-link--sub .bf-toc-index {
    width: 1.15rem;
    height: 1.15rem;
    flex-basis: 1.15rem;
    margin-top: .12rem;
    border-radius: 4px;
    background: transparent;
    font-size: .62rem;
    line-height: 1.05rem;
    font-weight: 600;
    color: var(--bf-muted);
}

.bf-toc-link--chapter {
    font-weight: 700;
    color: var(--color-text-strong);
    font-size: .9rem;
}

.bf-toc-link--sub {
    font-weight: 500;
    font-size: .82rem;
    color: var(--bf-muted);
}

.bf-toc-item--chapter + .bf-toc-item--chapter {
    margin-top: .7rem;
}

.bf-toc-item--chapter > .bf-toc-block {
    border: 1px solid var(--bf-border);
    border-radius: var(--radius-sm);
    background: var(--bf-surface);
    padding: .45rem .5rem .5rem;
}

.bf-toc-item--chapter.is-current-branch > .bf-toc-block {
    border-color: var(--color-border);
    background: var(--color-surface-soft);
}

.bf-toc-item--chapter.is-active > .bf-toc-block {
    border-color: var(--color-primary);
    background: var(--bf-soft);
}

.bf-toc-item--sub.is-active > .bf-toc-block {
    background: var(--color-surface-soft);
    border-radius: 8px;
}

.bf-toc-item--sub + .bf-toc-item--sub {
    margin-top: .1rem;
}

.bf-toc-children {
    margin-top: .2rem;
    padding-inline-start: .7rem;
    border-inline-start: 1px solid var(--bf-border);
}

.bf-toc-fold {
    margin-top: .35rem;
}

.bf-toc-fold__summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .4rem;
    width: 100%;
    min-height: 2.35rem;
    margin: 0;
    padding: .4rem .55rem;
    border: 1px solid var(--bf-border);
    border-radius: 8px;
    background: var(--color-surface-soft);
    color: var(--color-text-strong);
    font-size: .8rem;
    font-weight: 600;
    line-height: 1.3;
    user-select: none;
    transition: background-color var(--transition), border-color var(--transition), color var(--transition);
}

.bf-toc-fold__summary::-webkit-details-marker {
    display: none;
}

.bf-toc-fold__icon {
    flex: 0 0 auto;
    font-size: 1rem;
    line-height: 1;
    color: var(--color-primary);
    transition: transform var(--transition);
}

.bf-toc-fold[open] > .bf-toc-fold__summary .bf-toc-fold__icon {
    transform: rotate(180deg);
}

.bf-toc-fold__label {
    min-width: 0;
}

.bf-toc-fold__count {
    margin-inline-start: auto;
    min-width: 1.35rem;
    padding: .08rem .4rem;
    border-radius: 999px;
    background: var(--bf-surface);
    border: 1px solid var(--bf-border);
    color: var(--bf-muted);
    font-size: .72rem;
    font-weight: 700;
    text-align: center;
}

.bf-toc-fold[open] > .bf-toc-fold__summary {
    background: var(--bf-soft);
    border-color: var(--color-border);
}

.bf-toc-fold__summary:hover,
.bf-toc-fold__summary:focus-visible {
    background: var(--bf-soft);
    border-color: var(--color-primary);
    color: var(--color-primary-dark);
    outline: 0;
}

.bf-toc-fold__summary:focus-visible {
    box-shadow: 0 0 0 .15rem rgba(12, 160, 230, .22);
}

.bf-toc-nav--landing .bf-toc-item--chapter + .bf-toc-item--chapter {
    margin-top: .85rem;
}

.bf-toc-nav--landing .bf-toc-item--chapter > .bf-toc-block {
    padding: .55rem .6rem .6rem;
}

.bf-toc-nav--landing .bf-toc-link--chapter {
    padding: .28rem .3rem;
}

.bf-toc-nav--landing .bf-toc-link--sub {
    padding: .28rem .35rem;
}

@media (min-width: 992px) {
    .bf-toc--sticky {
        position: sticky;
        top: .75rem;
        max-height: calc(100vh - 1.5rem);
        overflow-y: auto;
    }
}

.bf-main {
    background: var(--bf-surface);
    border: 1px solid var(--bf-border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-soft);
    padding: 1.05rem 1.15rem 1.2rem;
    min-width: 0;
}

.bf-html {
    font-size: 1rem;
    line-height: 1.9;
    overflow-wrap: anywhere;
    word-break: break-word;
}

.bf-html--reader {
    max-width: var(--bf-reader-max);
    margin-inline: auto;
    font-size: 1.05rem;
    line-height: 1.95;
}

.bf-html p {
    margin: 0 0 .9rem;
}

.bf-html h1,
.bf-html h2,
.bf-html h3,
.bf-html h4 {
    color: var(--color-text-strong);
    line-height: 1.4;
    margin: 1.2rem 0 .6rem;
}

.bf-html ul,
.bf-html ol {
    padding-inline-start: 1.25rem;
    margin: 0 0 .9rem;
}

.bf-html blockquote {
    margin: 0 0 .9rem;
    padding: .55rem .85rem;
    border-inline-start: 3px solid var(--color-primary);
    background: var(--bf-soft);
    color: var(--color-text);
}

.bf-html img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: .75rem auto;
}

.bf-html table {
    width: 100%;
    max-width: 100%;
    border-collapse: collapse;
    display: block;
    overflow-x: auto;
    margin: 0 0 .9rem;
}

.bf-html th,
.bf-html td {
    border: 1px solid var(--bf-border);
    padding: .35rem .5rem;
    vertical-align: top;
}

.bf-html a {
    color: var(--color-link);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.bf-nav {
    display: flex;
    justify-content: space-between;
    gap: .75rem;
    margin-top: 1.25rem;
    padding-top: .85rem;
    border-top: 1px solid var(--bf-border);
}

.bf-nav--mobile {
    display: none;
}

.bf-nav__side {
    min-width: 0;
    max-width: 48%;
}

.bf-nav__side--next {
    margin-inline-start: auto;
}

.bf-nav__link {
    display: inline-flex;
    align-items: flex-start;
    gap: .4rem;
    color: var(--color-link);
    text-decoration: none;
    font-size: .86rem;
    max-width: 100%;
}

.bf-nav__link:hover .bf-nav__label,
.bf-nav__link:focus-visible .bf-nav__label {
    text-decoration: underline;
}

.bf-nav__chevron {
    flex-shrink: 0;
    margin-top: .12rem;
    font-size: 1rem;
    line-height: 1;
    color: var(--color-primary);
}

[dir="rtl"] .bf-nav__chevron--prev,
[dir="rtl"] .bf-nav__chevron--next {
    transform: scaleX(-1);
}

.bf-nav__text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.bf-nav__hint {
    font-size: .72rem;
    color: var(--bf-muted);
}

.bf-nav__label {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 600;
    color: var(--color-text-strong);
}

.bf-mobile-toc {
    margin-bottom: .75rem;
}

.bf-mobile-toc__summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: .55rem;
    width: 100%;
    background: var(--bf-surface);
    border: 1px solid var(--bf-border);
    border-radius: var(--radius-sm);
    padding: .65rem .85rem;
    font-weight: 700;
    font-size: .9rem;
    color: var(--color-text-strong);
    min-height: 48px;
    user-select: none;
    transition: background-color var(--transition), border-color var(--transition);
}

.bf-mobile-toc summary::-webkit-details-marker,
.bf-mobile-toc__summary::-webkit-details-marker {
    display: none;
}

.bf-mobile-toc__copy {
    display: flex;
    align-items: center;
    gap: .4rem;
    min-width: 0;
    flex: 1 1 auto;
}

.bf-mobile-toc__count {
    flex: 0 0 auto;
    min-width: 1.4rem;
    padding: .1rem .42rem;
    border-radius: 999px;
    border: 1px solid var(--bf-border);
    background: var(--color-surface-soft);
    color: var(--bf-muted);
    font-size: .75rem;
    font-weight: 700;
    text-align: center;
}

.bf-mobile-toc__icon {
    margin-inline-start: auto;
    font-size: 1.1rem;
    line-height: 1;
    color: var(--color-primary);
    transition: transform var(--transition);
}

.bf-mobile-toc[open] .bf-mobile-toc__icon {
    transform: rotate(180deg);
}

.bf-mobile-toc[open] .bf-mobile-toc__summary {
    background: var(--bf-soft);
    border-color: var(--color-border);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.bf-mobile-toc__summary:hover,
.bf-mobile-toc__summary:focus-visible {
    background: var(--bf-soft);
    border-color: var(--color-primary);
    outline: 0;
}

.bf-mobile-toc__summary:focus-visible {
    box-shadow: 0 0 0 .15rem rgba(12, 160, 230, .22);
}

.bf-mobile-toc .bf-toc {
    border-top-left-radius: 0;
    border-top-right-radius: 0;
    border-top: 0;
    box-shadow: none;
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 575.98px) {
    .bf-card__cover {
        height: 150px;
        padding: .6rem;
    }

    .bf-card__body {
        padding: .7rem .7rem .85rem;
    }

    .bf-card__title {
        font-size: .84rem;
        min-height: 2.5rem;
    }

    .bf-landing__cover {
        flex-basis: 6.25rem;
        width: 6.25rem;
    }

    .bf-landing-bar.bf-landing__actions--mobile {
        --bf-landing-bar-height: 3.5rem;
        display: block;
        position: fixed;
        inset-inline: 0;
        bottom: 0;
        z-index: 40;
        margin: 0;
        padding: 0;
        border-top: 1px solid var(--bf-border);
        background: var(--bf-surface);
        box-shadow: 0 -4px 14px rgba(20, 30, 40, 0.07);
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .bf-landing-bar__inner {
        display: flex;
        align-items: center;
        gap: .45rem;
        max-width: var(--hp-content-width, 1100px);
        margin: 0 auto;
        padding: .3rem .55rem;
        min-height: var(--bf-landing-bar-height);
        box-sizing: border-box;
    }

    .bf-landing-bar__btn {
        flex: 1 1 0;
        min-width: 0;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: .35rem;
        min-height: 2.55rem;
        padding-inline: .7rem;
        white-space: nowrap;
    }

    .bf-landing-bar__btn i {
        font-size: 1rem;
        line-height: 1;
    }

    .bf-wrap--landing-has-bar {
        padding-bottom: calc(1rem + var(--bf-landing-bar-height, 3.5rem) + env(safe-area-inset-bottom, 0px));
    }

    .bf-toc-nav--landing .bf-toc-item--chapter + .bf-toc-item--chapter {
        margin-top: .55rem;
    }

    .bf-toc-nav--landing .bf-toc-item--chapter > .bf-toc-block {
        padding: .4rem .45rem .45rem;
    }

    .bf-toc-link--chapter {
        font-size: .84rem;
        padding: .28rem .3rem;
    }

    .bf-toc-link--sub {
        font-size: .78rem;
        padding-block: .28rem;
        padding-inline: .3rem .45rem;
    }

    .bf-toc-link.is-active {
        min-height: 2.5rem;
    }

    .bf-toc-children {
        padding-inline-start: .5rem;
    }

    .bf-toc-fold__summary {
        margin-inline-start: 0;
        min-height: 2.5rem;
        padding: .45rem .6rem;
        font-size: .84rem;
    }
}

@media (max-width: 991.98px) {
    .bf-layout {
        grid-template-columns: 1fr;
    }

    .bf-toc--desktop {
        display: none;
    }

    .bf-toc-toggle {
        display: inline-flex;
    }

    .bf-toc-link.is-active {
        min-height: 2.5rem;
    }

    .bf-main {
        padding: .9rem .85rem 1rem;
    }

    .bf-nav--desktop {
        display: none;
    }

    .bf-nav--mobile {
        --bf-mobile-nav-height: 4rem;
        display: block;
        position: fixed;
        inset-inline: 0;
        bottom: 0;
        z-index: 40;
        margin: 0;
        padding: 0;
        border-top: 1px solid var(--bf-border);
        background: var(--bf-surface);
        box-shadow: 0 -4px 14px rgba(20, 30, 40, 0.07);
        padding-bottom: env(safe-area-inset-bottom, 0);
    }

    .bf-nav__bar {
        display: flex;
        align-items: center;
        gap: .3rem;
        max-width: var(--hp-content-width, 1100px);
        margin: 0 auto;
        padding: .3rem .45rem;
        min-height: var(--bf-mobile-nav-height);
        box-sizing: border-box;
    }

    .bf-nav__btn {
        flex: 0 1 4.75rem;
        min-width: 0;
        max-width: 5.75rem;
        display: inline-flex;
        align-items: center;
        gap: .15rem;
        min-height: 2.85rem;
        padding: .15rem .3rem;
        border: 0;
        border-radius: var(--radius-sm);
        background: transparent;
        color: var(--color-link);
        text-decoration: none;
        box-sizing: border-box;
    }

    .bf-nav__btn--prev,
    .bf-nav__btn--next {
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        gap: .05rem;
    }

    .bf-nav__btn-main {
        display: inline-flex;
        align-items: center;
        gap: .15rem;
        min-width: 0;
        line-height: 1.15;
    }

    .bf-nav__btn--prev .bf-nav__btn-main {
        justify-content: flex-start;
    }

    .bf-nav__btn--next .bf-nav__btn-main {
        justify-content: flex-end;
    }

    .bf-nav__btn-sub {
        display: block;
        max-width: 100%;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: .64rem;
        font-weight: 400;
        line-height: 1.15;
        color: var(--bf-muted);
    }

    .bf-nav__btn--prev .bf-nav__btn-sub {
        text-align: start;
    }

    .bf-nav__btn--next .bf-nav__btn-sub {
        text-align: end;
    }

    .bf-nav__btn--next {
        text-align: end;
    }

    .bf-nav__btn--prev {
        text-align: start;
    }

    .bf-nav__btn--books {
        flex: 0 1 4.5rem;
        max-width: 5.25rem;
        justify-content: center;
        text-align: center;
        margin-inline-start: .1rem;
        min-height: 2.85rem;
        height: auto;
    }

    .bf-nav__books-icon {
        font-size: .95rem;
        line-height: 1;
        color: var(--color-primary);
    }

    .bf-nav__btn--empty {
        flex: 0 1 4.75rem;
        max-width: 5.75rem;
        min-height: 2.85rem;
        visibility: hidden;
        pointer-events: none;
        border: 0;
        background: transparent;
        padding: 0;
    }

    .bf-nav__btn .bf-nav__chevron {
        margin-top: 0;
        font-size: .95rem;
    }

    .bf-nav__btn-label {
        display: block;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: .74rem;
        font-weight: 400;
        line-height: 1.2;
        max-width: 100%;
        color: var(--bf-muted);
    }

    .bf-nav__btn:hover,
    .bf-nav__btn:focus-visible {
        color: var(--color-primary-dark);
        background: var(--bf-soft);
    }

    .bf-nav__btn:focus-visible {
        outline: 2px solid var(--color-primary);
        outline-offset: 1px;
    }

    .bf-nav__current {
        flex: 1 1 auto;
        min-width: 0;
        max-width: 12rem;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: .3rem;
        min-height: 2.5rem;
        height: 2.5rem;
        margin: 0 auto;
        padding: .2rem .45rem;
        border: 1px solid var(--bf-border);
        border-radius: 999px;
        background: var(--bf-soft);
        color: var(--color-text-strong);
        font: inherit;
        cursor: pointer;
        box-sizing: border-box;
    }

    .bf-nav__current-icon {
        flex-shrink: 0;
        font-size: .9rem;
        line-height: 1;
        color: var(--color-primary);
    }

    .bf-nav__current-title {
        min-width: 0;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        font-size: .72rem;
        font-weight: 600;
        line-height: 1.2;
    }

    .bf-nav__current:hover,
    .bf-nav__current:focus-visible,
    .bf-nav__current[aria-expanded="true"] {
        border-color: var(--color-primary);
        color: var(--color-primary-dark);
    }

    .bf-nav__current:focus-visible {
        outline: 2px solid var(--color-primary);
        outline-offset: 1px;
    }

    .site-main.site-main--book-reader:has(.bf-nav--mobile),
    .bf-wrap--reader-has-mobile-nav {
        padding-bottom: calc(1rem + var(--bf-mobile-nav-height, 3.5rem) + env(safe-area-inset-bottom, 0px));
    }

    .bf-wrap--reader-has-mobile-nav .bf-main--reader {
        padding-bottom: 1rem;
    }
}

@media (min-width: 992px) {
    .bf-mobile-toc {
        display: none;
    }

    .bf-toc-toggle {
        display: none !important;
    }

    .bf-nav--mobile {
        display: none !important;
    }
}