/* === AFFILIATE BOOKS === */

.books-section {
    padding: 80px 0;
    background: #f8fafc;
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 28px;
    margin-top: 40px;
}

.books-grid.books-grid-compact {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    margin-top: 0;
}

.book-card {
    background: #fff;
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 18px 34px rgba(15, 23, 42, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    display: flex;
    flex-direction: column;
    height: auto;
    position: relative;
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.book-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 24px 44px rgba(15, 23, 42, 0.12);
    border-color: rgba(21, 101, 192, 0.18);
}

.book-img {
    height: 220px;
    background: linear-gradient(135deg, #edf5ff, #cfe7ff);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.book-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.book-card:hover .book-img img {
    transform: scale(1.05);
}

.book-img-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #dceefe, #9ad0ff);
    color: rgba(255, 255, 255, 0.88);
    font-size: 40px;
}

.book-featured-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    background: rgba(255, 255, 255, 0.94);
    color: var(--medical-blue);
    padding: 7px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 800;
    z-index: 2;
    box-shadow: 0 10px 22px rgba(15, 23, 42, 0.12);
}

.book-content {
    padding: 18px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.book-category {
    font-size: 12px;
    color: var(--medical-blue);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 8px;
    font-weight: 800;
}

.book-title {
    font-size: 18px;
    color: var(--text-primary);
    margin-bottom: 8px;
    line-height: 1.35;
    font-weight: 700;
}

.book-author {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 14px;
}

.book-footer {
    padding-top: 16px;
    margin-top: auto;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.book-price {
    font-size: 22px;
    font-weight: 800;
    color: var(--text-primary);
}

.btn-buy {
    background: var(--medical-blue);
    color: #fff !important;
    padding: 10px 18px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease;
    cursor: pointer;
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.btn-buy:hover {
    background: var(--medical-blue-dark);
    transform: translateY(-1px);
}

.btn-buy-large {
    padding: 14px 26px;
    font-size: 1rem;
}

.single-book-page {
    background: linear-gradient(180deg, #f6fbff 0%, #ffffff 22%);
}

.book-page-header {
    padding: 28px 0 18px;
}

.single-book-layout {
    display: grid;
    grid-template-columns: minmax(280px, 0.8fr) minmax(0, 1.2fr);
    gap: 42px;
    align-items: start;
    margin-top: 18px;
}

.single-book-cover-shell {
    position: relative;
}

.single-book-cover {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 26px 54px rgba(15, 23, 42, 0.14);
    border: 1px solid rgba(15, 23, 42, 0.08);
    background: white;
}

.single-book-cover-img,
.single-book-cover-placeholder {
    display: block;
    width: 100%;
    aspect-ratio: 4 / 5;
    object-fit: cover;
}

.single-book-details {
    display: grid;
    gap: 22px;
    align-content: start;
}

.single-book-topline {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.book-category-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: rgba(21, 101, 192, 0.1);
    color: var(--medical-blue);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.book-category-pill.is-soft {
    background: rgba(15, 23, 42, 0.05);
    color: var(--text-primary);
}

.single-book-title {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.12;
    margin: 0;
}

.single-book-summary {
    font-size: 1.02rem;
    line-height: 1.75;
    color: var(--text-secondary);
    margin: 0;
    max-width: 60ch;
}

.single-book-meta-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.single-book-meta-card {
    padding: 18px;
    border-radius: 18px;
    background: white;
    border: 1px solid rgba(15, 23, 42, 0.08);
    box-shadow: 0 14px 28px rgba(15, 23, 42, 0.05);
}

.single-book-meta-label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-weight: 800;
}

.single-book-meta-card strong {
    display: block;
    color: var(--text-primary);
    line-height: 1.4;
}

.single-book-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.book-trust-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.book-trust-item {
    display: flex;
    gap: 10px;
    align-items: flex-start;
    padding: 14px 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(15, 23, 42, 0.08);
}

.book-trust-item i {
    color: var(--medical-blue);
    margin-top: 3px;
}

.single-book-main {
    min-width: 0;
}

.book-recommendation-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.book-recommendation-card {
    padding: 18px;
    border-radius: 18px;
    background: linear-gradient(180deg, #ffffff 0%, #f6faff 100%);
    border: 1px solid rgba(21, 101, 192, 0.1);
}

.book-recommendation-card h3 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.book-recommendation-card p {
    margin: 0;
    color: var(--text-secondary);
    line-height: 1.65;
}

.book-sidebar-card .sidebar-nav-title {
    margin-bottom: 18px;
}

.book-sidebar-actions {
    display: grid;
    gap: 10px;
    margin-top: 18px;
}

.book-checklist {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 12px;
}

.book-checklist li {
    position: relative;
    padding-left: 24px;
    color: var(--text-secondary);
    line-height: 1.65;
}

.book-checklist li::before {
    content: '\f058';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    position: absolute;
    left: 0;
    top: 0;
    color: var(--success-green);
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }

    to {
        transform: rotate(360deg);
    }
}

.fa-spinner {
    animation: spin 1s linear infinite;
}

@media (max-width: 991px) {
    .single-book-layout,
    .single-book-meta-grid,
    .book-trust-strip,
    .book-recommendation-grid {
        grid-template-columns: 1fr;
    }

    .single-book-cover {
        position: static;
    }
}

@media (max-width: 768px) {
    .single-book-actions {
        flex-direction: column;
    }

    .single-book-actions .btn-buy,
    .single-book-actions .btn-outline {
        width: 100%;
        justify-content: center;
    }

    .book-footer {
        flex-direction: column;
        align-items: stretch;
    }

    .book-footer .btn-buy {
        width: 100%;
    }
}