/* Book Manager front-end styles. Kept intentionally small and theme-friendly. */
.btb-book-summary-card,
.btb-book-details-wrap,
.btb-author-box {
    border: 1px solid rgba(0, 0, 0, 0.10);
    border-radius: 16px;
    padding: 1.25rem;
    margin: 1.25rem 0;
    background: rgba(255, 255, 255, 0.72);
}

.btb-book-badge,
.btb-loop-badge,
.btb-card-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    margin: 0 0.4rem 0.5rem 0;
    padding: 0.28rem 0.6rem;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.1;
    background: #7a1e22;
    color: #fffdf8;
}

.btb-loop-format {
    display: inline-flex;
    margin: 0 0 0.5rem 0;
    font-size: 0.82rem;
    opacity: 0.78;
}

.btb-book-tax-inline {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.25rem;
    margin: 0.6rem 0 1rem;
    font-size: 0.95rem;
}

.btb-book-hook p:last-child,
.btb-preorder-notice p:last-child,
.btb-author-box p:last-child {
    margin-bottom: 0;
}

.btb-preorder-notice {
    border-left: 4px solid #7a1e22;
    margin: 0.9rem 0 1.1rem;
    padding: 0.85rem 1rem;
    background: rgba(122, 30, 34, 0.08);
}

.btb-preorder-notice strong {
    display: block;
    margin-bottom: 0.35rem;
}

.btb-preorder-notice span {
    font-weight: 700;
}

.btb-why-read ul {
    margin-left: 1.1rem;
}

.btb-sample-button,
.btb-trailer-link,
.btb-card-button,
.btb-author-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border-radius: 999px;
    padding: 0.62rem 1rem;
    border: 1px solid currentColor;
    font-weight: 700;
}

.btb-book-details-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 0.75rem;
}

.btb-detail-row {
    padding: 0.85rem;
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
}

.btb-detail-row span {
    display: block;
    font-size: 0.78rem;
    opacity: 0.72;
    margin-bottom: 0.25rem;
}

.btb-review-quote {
    margin: 1.2rem 0 0;
    padding: 1rem 1.2rem;
    border-left: 4px solid currentColor;
}

.btb-review-quote cite {
    display: block;
    margin-top: 0.5rem;
    font-style: normal;
    font-weight: 700;
}

.btb-book-grid {
    display: grid;
    gap: 1.25rem;
}
.btb-book-grid-1 { grid-template-columns: 1fr; }
.btb-book-grid-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.btb-book-grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.btb-book-grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.btb-book-grid-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.btb-book-grid-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

.btb-book-card {
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.10);
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.75);
}

.btb-book-card-image {
    display: block;
    aspect-ratio: 3 / 4;
    background: rgba(0, 0, 0, 0.05);
}

.btb-book-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.btb-book-card-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 180px;
}

.btb-book-card-body {
    padding: 1rem;
}

.btb-book-card h3 {
    margin: 0.3rem 0 0.55rem;
    font-size: 1.05rem;
}

.btb-card-meta {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.75rem;
    margin: 0.75rem 0;
}

@media (max-width: 900px) {
    .btb-book-grid-4,
    .btb-book-grid-5,
    .btb-book-grid-6 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 560px) {
    .btb-book-grid,
    .btb-book-grid-2,
    .btb-book-grid-3,
    .btb-book-grid-4,
    .btb-book-grid-5,
    .btb-book-grid-6 {
        grid-template-columns: 1fr;
    }
}