/* ===== Detail Buku ===== */

.page-book-detail {
    background: #f7f9fc;
}

.book-detail-page {
    padding: 1.5rem 0 4rem;
}

.book-detail-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 1.5rem;
}

.book-detail-breadcrumb a:hover {
    color: var(--primary);
}

.book-detail-breadcrumb span {
    color: var(--primary);
    font-weight: 600;
}

.book-detail-breadcrumb i {
    font-size: 0.7rem;
    opacity: 0.55;
}

.book-detail-top {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr) 280px;
    gap: 1.5rem;
    align-items: start;
    margin-bottom: 2rem;
}

.book-detail-gallery {
    display: grid;
    gap: 0.85rem;
}

.book-detail-thumbs {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.book-detail-thumb {
    border: 2px solid transparent;
    border-radius: 10px;
    overflow: hidden;
    padding: 0;
    background: #fff;
    cursor: pointer;
    aspect-ratio: 3 / 4;
}

.book-detail-thumb.active {
    border-color: var(--primary);
}

.book-detail-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.book-detail-main-image {
    background: #fff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.book-detail-main-image img {
    width: 100%;
    display: block;
    aspect-ratio: 3 / 4.1;
    object-fit: cover;
}

.book-preview-btn {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--navy);
    font-weight: 600;
    cursor: pointer;
}

.book-preview-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.book-detail-info {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.book-detail-category {
    display: inline-block;
    font-size: 0.72rem;
    letter-spacing: 0.12em;
    font-weight: 700;
    color: #6366f1;
    margin-bottom: 0.5rem;
}

.book-detail-info h1 {
    font-size: clamp(1.35rem, 2.5vw, 1.85rem);
    line-height: 1.25;
    color: var(--navy);
    margin-bottom: 0.65rem;
}

.book-detail-author {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--muted);
    font-size: 0.92rem;
    margin-bottom: 1rem;
}

.book-detail-author a {
    color: var(--navy);
    font-weight: 600;
}

.book-detail-meta-row {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 0.65rem;
    margin-bottom: 1rem;
}

.book-meta-chip {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 0.65rem 0.55rem;
    text-align: center;
}

.book-meta-chip i {
    display: block;
    color: var(--primary);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.book-meta-chip span {
    display: block;
    color: var(--muted);
    font-size: 0.68rem;
    margin-bottom: 0.15rem;
}

.book-meta-chip strong {
    display: block;
    color: var(--navy);
    font-size: 0.72rem;
    line-height: 1.3;
    word-break: break-word;
}

.book-detail-excerpt {
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.75;
    margin-bottom: 1rem;
}

.book-read-more {
    border: none;
    background: none;
    color: #2563eb;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
    margin-top: 0.25rem;
}

.book-detail-price {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--primary-dark);
    margin-bottom: 1rem;
}

.book-detail-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
}

.book-detail-actions .btn-primary,
.book-detail-actions .btn-outline,
.book-detail-actions .btn-navy {
    padding: 0.8rem 1.2rem;
    font-size: 0.9rem;
}

.btn-navy {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    font-weight: 700;
    background: var(--navy);
    color: #fff;
    border: none;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-navy:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px rgba(26, 43, 72, 0.25);
}

.book-detail-sidebar {
    display: grid;
    gap: 1rem;
    align-content: start;
}

.book-sidebar-actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
}

.book-save-btn,
.book-share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.7rem 0.85rem;
    border-radius: 12px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--navy);
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
}

.book-save-btn.active {
    color: var(--primary);
    border-color: rgba(232, 99, 90, 0.35);
}

.book-author-card,
.book-related-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 1rem;
    box-shadow: var(--shadow);
}

.book-author-card h3,
.book-related-head h3 {
    font-size: 0.98rem;
    color: var(--navy);
    margin-bottom: 0.85rem;
}

.book-author-card-inner {
    display: grid;
    grid-template-columns: 56px 1fr;
    gap: 0.75rem;
}

.book-author-avatar {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: #fef2f1;
    overflow: hidden;
    display: grid;
    place-items: center;
    font-weight: 800;
    color: var(--primary);
}

.book-author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.book-author-card-inner strong {
    display: block;
    color: var(--navy);
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.book-author-card-inner p {
    color: var(--muted);
    font-size: 0.82rem;
    line-height: 1.55;
    margin-bottom: 0.45rem;
}

.book-author-card-inner a {
    color: var(--primary);
    font-size: 0.82rem;
    font-weight: 600;
}

.book-related-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.book-related-head a {
    color: var(--primary);
    font-size: 0.78rem;
    font-weight: 600;
}

.book-related-list {
    display: grid;
    gap: 0.75rem;
}

.book-related-item {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 0.65rem;
    color: inherit;
}

.book-related-item img {
    width: 52px;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    border-radius: 8px;
}

.book-related-item strong {
    display: block;
    font-size: 0.82rem;
    color: var(--navy);
    line-height: 1.35;
    margin-bottom: 0.15rem;
}

.book-related-item span {
    display: block;
    color: var(--muted);
    font-size: 0.75rem;
}

.book-related-item em {
    display: block;
    color: var(--primary-dark);
    font-style: normal;
    font-weight: 700;
    font-size: 0.82rem;
    margin-top: 0.2rem;
}

/* Tabs */
.book-detail-tabs-section {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    overflow: hidden;
    margin-bottom: 1.5rem;
}

.book-detail-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    border-bottom: 1px solid var(--border);
    padding: 0 1rem;
}

.book-tab {
    border: none;
    background: none;
    padding: 1rem 1.1rem;
    color: var(--muted);
    font-weight: 600;
    font-size: 0.92rem;
    cursor: pointer;
    position: relative;
}

.book-tab.active {
    color: var(--primary);
}

.book-tab.active::after {
    content: '';
    position: absolute;
    left: 0.75rem;
    right: 0.75rem;
    bottom: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 999px;
}

.book-tab-panels {
    padding: 1.5rem;
}

.book-tab-panel {
    display: none;
}

.book-tab-panel.active {
    display: block;
}

.book-tab-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 1.5rem;
}

.book-tab-copy p {
    color: var(--muted);
    line-height: 1.8;
    margin-bottom: 1rem;
}

.book-tab-copy h4,
.book-toc-card h4 {
    color: var(--navy);
    font-size: 1rem;
    margin-bottom: 0.75rem;
}

.book-feature-list {
    list-style: none;
    display: grid;
    gap: 0.55rem;
}

.book-feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    color: var(--muted);
    font-size: 0.92rem;
}

.book-feature-list i {
    color: var(--primary);
    margin-top: 0.15rem;
}

.book-toc-card {
    background: #f8fafc;
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 1rem;
}

.book-toc-accordion {
    display: grid;
    gap: 0.35rem;
}

.book-toc-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.book-toc-trigger {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem;
    padding: 0.75rem 0.85rem;
    border: none;
    background: none;
    text-align: left;
    color: var(--navy);
    font-weight: 600;
    font-size: 0.88rem;
    cursor: pointer;
}

.book-toc-trigger i {
    color: var(--muted);
    transition: transform 0.2s ease;
}

.book-toc-item.open .book-toc-trigger i {
    transform: rotate(180deg);
}

.book-toc-content {
    display: none;
    padding: 0 0.85rem 0.85rem;
}

.book-toc-item.open .book-toc-content {
    display: block;
}

.book-toc-content p {
    color: var(--muted);
    font-size: 0.85rem;
    line-height: 1.6;
}

.book-spec-table-wrap {
    overflow-x: auto;
}

.book-spec-table {
    width: 100%;
    border-collapse: collapse;
}

.book-spec-table th,
.book-spec-table td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    text-align: left;
    font-size: 0.92rem;
}

.book-spec-table th {
    width: 220px;
    color: var(--muted);
    font-weight: 600;
}

.book-spec-table td {
    color: var(--navy);
}

.book-review-empty,
.book-detail-empty {
    text-align: center;
    padding: 2.5rem 1rem;
    color: var(--muted);
}

.book-review-empty i {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.book-review-empty h4 {
    color: var(--navy);
    margin-bottom: 0.35rem;
}

.book-empty-note {
    color: var(--muted);
    font-size: 0.9rem;
}

/* Help banner */
.book-help-banner {
    background: #eef4fb;
    border-radius: 18px;
    padding: 1.5rem;
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 1.5rem;
    align-items: center;
}

.book-help-copy h3 {
    color: var(--navy);
    margin-bottom: 0.35rem;
}

.book-help-copy p {
    color: var(--muted);
    font-size: 0.92rem;
    margin-bottom: 0.85rem;
}

.book-help-features {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.75rem;
}

.book-help-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.65);
    border-radius: 14px;
    padding: 0.85rem 0.5rem;
}

.book-help-item i {
    display: block;
    color: var(--primary);
    font-size: 1.25rem;
    margin-bottom: 0.35rem;
}

.book-help-item strong {
    display: block;
    color: var(--navy);
    font-size: 0.82rem;
    margin-bottom: 0.15rem;
}

.book-help-item span {
    color: var(--muted);
    font-size: 0.75rem;
}

@media (max-width: 1100px) {
    .book-detail-top {
        grid-template-columns: 260px 1fr;
    }

    .book-detail-sidebar {
        grid-column: 1 / -1;
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .book-detail-meta-row {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .book-tab-grid {
        grid-template-columns: 1fr;
    }

    .book-help-banner {
        grid-template-columns: 1fr;
    }

    .book-help-features {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 768px) {
    .book-detail-top {
        grid-template-columns: 1fr;
    }

    .book-detail-sidebar {
        grid-template-columns: 1fr;
    }

    .book-detail-meta-row {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .book-detail-actions {
        flex-direction: column;
    }

    .book-detail-actions .btn-primary,
    .book-detail-actions .btn-outline,
    .book-detail-actions .btn-navy {
        width: 100%;
    }

    .book-help-features {
        grid-template-columns: 1fr;
    }
}