.books-shell {
    width: min(1180px, calc(100% - 2rem));
    margin: 0 auto;
    padding: 2rem 0 3rem;
    display: grid;
    grid-template-columns: 260px minmax(0, 1fr);
    gap: 1.25rem;
    align-items: start;
}

.books-main {
    display: grid;
    gap: 1rem;
    min-width: 0;
}

.books-card {
    border: 1px solid rgba(16, 185, 129, 0.12);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.94);
    box-shadow: 0 18px 45px -34px rgba(15, 23, 42, 0.38);
    padding: 1.25rem;
}

.books-panel {
    display: grid;
    gap: 1rem;
}

.books-sidebar {
    position: sticky;
    top: 88px;
    display: grid;
    gap: 1rem;
}

.books-sidebar-header h2,
.books-section-heading h2,
.books-hero-copy h1,
.books-hero-note h2,
.books-series-heading h3,
.books-guidance-item h3,
.books-cta-panel h2,
.books-featured-card h3 {
    color: var(--text-dark);
    margin: 0;
}

.books-sidebar-nav,
.books-sidebar-shortcuts {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0.55rem;
}

.books-sidebar-link,
.books-sidebar-shortcut {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: relative;
    min-height: 52px;
    border: 1px solid var(--border);
    border-radius: 12px;
    background: #f8fafc;
    color: var(--text-dark);
    text-decoration: none;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.books-sidebar-shortcut {
    background: rgba(255, 255, 255, 0.92);
}

.books-sidebar-link:hover,
.books-sidebar-link:focus-visible,
.books-sidebar-shortcut:hover,
.books-sidebar-shortcut:focus-visible {
    background: var(--primary-light);
    border-color: #b7e4c7;
    color: var(--primary-dark);
    outline: none;
    transform: translateY(-1px);
}

.books-sidebar-shortcut-primary {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
}

.books-sidebar-shortcut-primary:hover,
.books-sidebar-shortcut-primary:focus-visible {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.books-sidebar-link .material-icons,
.books-sidebar-shortcut .material-icons {
    font-size: 1.35rem;
}

.books-sidebar-link-label {
    position: absolute;
    left: 50%;
    bottom: -0.55rem;
    transform: translate(-50%, 0.4rem);
    padding: 0.24rem 0.5rem;
    border-radius: 999px;
    background: rgba(15, 23, 42, 0.92);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    box-shadow: 0 12px 24px -18px rgba(15, 23, 42, 0.85);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
    z-index: 3;
}

.books-sidebar-link:hover .books-sidebar-link-label,
.books-sidebar-link:focus-visible .books-sidebar-link-label,
.books-sidebar-shortcut:hover .books-sidebar-link-label,
.books-sidebar-shortcut:focus-visible .books-sidebar-link-label {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
}

.books-sidebar-status {
    display: grid;
    gap: 0.75rem;
}

.books-status-card {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 0.95rem 1rem;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #f8fafc;
}

.books-status-card .material-icons {
    color: var(--primary);
    margin-top: 0.1rem;
}

.books-status-card strong {
    display: block;
    color: var(--text-dark);
    margin-bottom: 0.2rem;
}

.books-eyebrow,
.books-note-label,
.books-kpi-label,
.books-featured-domain,
.books-series-domain,
.books-series-note-label,
.books-series-entry-sequence {
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--accent);
}

.books-meta,
.books-subcopy,
.books-featured-card p,
.books-series-summary,
.books-series-note-card p,
.books-series-entry-copy p,
.books-guidance-item p,
.books-empty-state p {
    color: var(--text-light);
}

.books-hero {
    display: grid;
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.82fr);
    gap: 1rem;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.96) 0%, rgba(209, 250, 229, 0.8) 100%);
}

.books-hero-copy h1 {
    font-size: clamp(2rem, 4vw, 2.85rem);
    line-height: 1.08;
    margin-bottom: 0.8rem;
    letter-spacing: -0.03em;
}

.books-hero-note {
    padding: 1.15rem;
    border: 1px solid rgba(16, 185, 129, 0.12);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.9);
}

.books-note-list {
    margin: 0.85rem 0 0;
    padding-left: 1.15rem;
    color: var(--text-dark);
}

.books-note-list li + li {
    margin-top: 0.55rem;
}

.books-hero-actions,
.books-cta-actions,
.books-filter-bar,
.books-filter-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.books-hero-actions {
    margin-top: 1rem;
}

.books-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0.75rem 1rem;
    border-radius: 12px;
    text-decoration: none;
    font-weight: 600;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    border: 1px solid transparent;
    cursor: pointer;
    font: inherit;
}

.books-btn:hover,
.books-btn:focus-visible {
    transform: translateY(-1px);
    outline: none;
}

.books-btn-primary {
    background: var(--primary);
    color: var(--light);
    box-shadow: 0 12px 24px -18px rgba(5, 150, 105, 0.55);
}

.books-btn-primary:hover,
.books-btn-primary:focus-visible {
    background: var(--primary-dark);
}

.books-btn-secondary {
    background: rgba(255, 255, 255, 0.92);
    color: var(--primary-dark);
    border-color: var(--border);
}

.books-btn-secondary:hover,
.books-btn-secondary:focus-visible {
    background: var(--primary-light);
    border-color: #b7e4c7;
}

.books-kpi-grid,
.books-featured-grid,
.books-grid-two {
    display: grid;
    gap: 1rem;
}

.books-kpi-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.books-featured-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.books-grid-two {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.books-kpi-card,
.books-featured-card,
.books-series-card,
.books-guidance-item,
.books-series-note-card {
    border: 1px solid rgba(16, 185, 129, 0.12);
    border-radius: 16px;
    background: #f8fafc;
}

.books-kpi-card,
.books-featured-card {
    padding: 1rem;
}

.books-kpi-value {
    margin: 0.3rem 0 0.45rem;
    font-size: clamp(1.5rem, 3vw, 2.05rem);
    font-weight: 700;
    color: var(--text-dark);
}

.books-featured-top {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 0.8rem;
}

.books-featured-top .material-icons {
    color: var(--primary);
}

.books-featured-series,
.books-featured-sequence {
    margin: 0.18rem 0 0;
    color: var(--text-dark);
    font-weight: 600;
}

.books-inline-link {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    color: var(--primary-dark);
    font-weight: 600;
    text-decoration: none;
}

.books-inline-link:hover,
.books-inline-link:focus-visible {
    text-decoration: underline;
    outline: none;
}

.books-filter-toolbar {
    align-items: end;
    justify-content: space-between;
}

.books-search-field {
    flex: 1 1 320px;
    display: grid;
    gap: 0.45rem;
}

.books-search-field label {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text-dark);
}

.books-search-input {
    min-height: 46px;
    width: 100%;
    padding: 0.78rem 0.9rem;
    border-radius: 12px;
    border: 1px solid rgba(148, 163, 184, 0.45);
    background: #fff;
    color: var(--text-dark);
    font: inherit;
}

.books-search-input:focus {
    outline: none;
    border-color: rgba(16, 185, 129, 0.7);
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.12);
}

.books-filter-chip {
    min-height: 40px;
    padding: 0.55rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-dark);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.books-filter-chip:hover,
.books-filter-chip:focus-visible {
    background: var(--primary-light);
    border-color: #b7e4c7;
    color: var(--primary-dark);
    outline: none;
    transform: translateY(-1px);
}

.books-filter-chip-active {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
    color: #fff;
}

.books-results-label {
    margin: 0;
    color: var(--text-light);
}

.books-entry-results {
    display: grid;
    gap: 1rem;
}

.books-entry-results-heading h3 {
    margin: 0;
    color: var(--text-dark);
}

.books-entry-results-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1rem;
}

.books-entry-result-card {
    display: grid;
    gap: 0.8rem;
    padding: 1rem;
    border: 1px solid rgba(16, 185, 129, 0.12);
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.98) 0%, rgba(236, 253, 245, 0.92) 100%);
}

.books-entry-result-top {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
}

.books-entry-result-top h3,
.books-entry-result-top h3 a {
    margin: 0;
    color: var(--text-dark);
    text-decoration: none;
}

.books-entry-result-top h3 a:hover,
.books-entry-result-top h3 a:focus-visible {
    color: var(--primary-dark);
    text-decoration: underline;
    outline: none;
}

.books-entry-result-series,
.books-entry-result-domain {
    margin: 0;
    color: var(--text-light);
    font-size: 0.92rem;
}

.books-series-grid,
.books-guidance-list {
    display: grid;
    gap: 1rem;
}

.books-series-card {
    padding: 1.1rem;
}

.books-series-top,
.books-series-heading,
.books-series-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.books-series-top {
    justify-content: space-between;
    align-items: flex-start;
}

.books-series-heading {
    min-width: 0;
}

.books-series-icon {
    width: 46px;
    height: 46px;
    border-radius: 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(16, 185, 129, 0.12);
    color: var(--primary-dark);
    flex: 0 0 auto;
}

.books-series-count,
.books-series-level {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 34px;
    padding: 0.35rem 0.7rem;
    border-radius: 999px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--primary-dark);
    font-size: 0.82rem;
    font-weight: 700;
}

.books-series-summary {
    margin: 0.85rem 0 0;
}

.books-series-meta {
    flex-wrap: wrap;
    margin-top: 0.9rem;
}

.books-series-notes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.8rem;
    margin-top: 1rem;
}

.books-series-note-card {
    padding: 0.9rem 1rem;
}

.books-series-note-card p {
    margin: 0.35rem 0 0;
}

.books-series-entry-list {
    margin: 1rem 0 0;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 0.8rem;
}

.books-series-entry-list li {
    display: grid;
    grid-template-columns: minmax(78px, auto) minmax(0, 1fr);
    gap: 0.85rem;
    align-items: start;
    padding: 0.85rem 0.95rem;
    border-radius: 14px;
    border: 1px solid rgba(16, 185, 129, 0.1);
    background: rgba(255, 255, 255, 0.92);
}

.books-series-entry-copy a {
    color: var(--text-dark);
    font-weight: 700;
    text-decoration: none;
}

.books-series-entry-copy a:hover,
.books-series-entry-copy a:focus-visible {
    color: var(--primary-dark);
    text-decoration: underline;
    outline: none;
}

.books-series-entry-copy p {
    margin: 0.25rem 0 0;
}

.books-guidance-item {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 0.8rem;
    padding: 1rem;
}

.books-guidance-item .material-icons {
    color: var(--primary);
}

.books-cta-panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.97) 0%, rgba(236, 253, 245, 0.96) 100%);
}

.books-empty-state {
    display: grid;
    justify-items: center;
    gap: 0.45rem;
    padding: 2rem 1rem 1.5rem;
    text-align: center;
    border: 1px dashed rgba(16, 185, 129, 0.3);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.72);
}

.books-empty-state .material-icons {
    font-size: 2rem;
    color: var(--primary);
}

@media (max-width: 1180px) {
    .books-featured-grid,
    .books-entry-results-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 1024px) {
    .books-kpi-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .books-shell {
        width: min(1180px, calc(100% - 1.25rem));
        grid-template-columns: 1fr;
    }

    .books-sidebar {
        position: static;
    }

    .books-hero,
    .books-grid-two {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 680px) {
    .books-shell {
        padding: 1.2rem 0 2.4rem;
    }

    .books-card {
        padding: 1rem;
    }

    .books-sidebar-nav,
    .books-sidebar-shortcuts,
    .books-kpi-grid,
    .books-featured-grid,
    .books-entry-results-grid,
    .books-series-notes {
        grid-template-columns: 1fr;
    }

    .books-filter-toolbar {
        align-items: stretch;
    }

    .books-btn,
    .books-filter-chip {
        width: 100%;
        justify-content: center;
    }

    .books-series-top,
    .books-series-heading {
        flex-direction: column;
        align-items: flex-start;
    }

    .books-series-entry-list li {
        grid-template-columns: 1fr;
    }
}