/* ==========================================
   Virtual Library Styles - I.E.S. Santa Mónica
   ========================================== */

/* Filter Card Panel (Unificado con Contingencia) */
.library-filter-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    padding: 1.75rem 2rem;
    margin-bottom: 2.25rem;
}

.filter-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--color-border-light);
}

.filter-card-title {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin: 0;
}

.filter-card-title i {
    color: var(--color-primary-light);
}

.btn-reset-filters {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-muted);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-pill);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    transition: all var(--transition-fast);
}

.btn-reset-filters:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background-color: rgba(8, 46, 89, 0.04);
}

.library-filter-grid {
    display: grid;
    grid-template-columns: 1.25fr 1fr 1fr;
    gap: 1.25rem;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.filter-label {
    font-family: var(--font-body);
    font-size: 0.825rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.filter-select {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text-body);
    background-color: #fafafa;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 0.85rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
    width: 100%;
}

.filter-select:focus {
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(8, 46, 89, 0.08);
}


.library-summary-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-muted);
    margin-bottom: 1.5rem;
    padding: 0.5rem 0.25rem;
}

.library-summary-label {
    font-weight: 500;
    color: var(--color-primary);
}

/* Books Grid Layout */
.books-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    transition: opacity 250ms ease;
}

/* Book Card Container */
.book-card {
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.book-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: rgba(8, 46, 89, 0.25);
}

/* Clickable Cover Wrapper */
.book-cover-wrapper {
    position: relative;
    display: block;
    height: 240px;
    overflow: hidden;
    background-color: var(--color-primary-dark);
    text-decoration: none;
    cursor: pointer;
}


.book-cover-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top center;
    transition: transform 500ms ease;
    display: block;
}

.book-cover-wrapper:hover .book-cover-img {
    transform: scale(1.06);
}

.book-area-badge {
    position: absolute;
    top: 0.85rem;
    left: 0.85rem;
    background-color: var(--color-accent);
    color: var(--color-primary);
    font-family: var(--font-heading);
    font-size: 0.8rem;
    font-weight: 700;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    z-index: 2;
}

.book-year-badge {
    position: absolute;
    top: 0.85rem;
    right: 0.85rem;
    background-color: rgba(8, 46, 89, 0.88);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.2rem 0.65rem;
    border-radius: var(--radius-pill);
    backdrop-filter: blur(4px);
    z-index: 2;
}

/* Hover Overlay for Drive Action */
.book-cover-hover-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(8, 46, 89, 0.85);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    color: var(--color-white);
    opacity: 0;
    transition: opacity 300ms ease;
    z-index: 3;
}

.book-cover-hover-overlay i {
    font-size: 2.25rem;
    color: #34a853;
}

.book-cover-hover-overlay span {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    background-color: rgba(255, 255, 255, 0.15);
    padding: 0.4rem 1rem;
    border-radius: var(--radius-pill);
    border: 1px solid rgba(255, 255, 255, 0.25);
}

.book-cover-wrapper:hover .book-cover-hover-overlay {
    opacity: 1;
}

/* Card Body */
.book-card-body {
    padding: 1.35rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-area-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary-light);
    text-transform: uppercase;
    letter-spacing: 0.03em;
    margin-bottom: 0.4rem;
}

.book-card-title {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.35;
    margin-bottom: 0.5rem;
}

.book-card-title a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.book-card-title a:hover {
    color: var(--color-primary-light);
}

.book-author {
    font-family: var(--font-body);
    font-size: 0.875rem;
    color: var(--color-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin-bottom: 1.15rem;
}

.book-author i {
    color: var(--color-primary-light);
}

.book-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.775rem;
    color: var(--color-muted);
    padding-top: 0.75rem;
    margin-top: auto;
    border-top: 1px dashed var(--color-border-light);
}

/* Pagination Controls */
.pagination-container {
    margin-top: 3rem;
}

.pagination-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.pagination-btn {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background-color: var(--color-surface);
    color: var(--color-primary);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.pagination-btn:hover:not(.active) {
    background-color: var(--color-accent);
    color: var(--color-primary);
    border-color: var(--color-accent);
    transform: translateY(-2px);
}

.pagination-btn.active {
    background-color: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* Empty State */
.library-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    background-color: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px dashed var(--color-border);
}

.library-empty-state .empty-icon {
    font-size: 3.5rem;
    color: var(--color-muted);
    margin-bottom: 1rem;
}

.library-empty-state h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.library-empty-state p {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-muted);
}

/* Responsive Media Queries */
@media (max-width: 1200px) {
    .books-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .library-filter-grid {
        grid-template-columns: 1fr;
        gap: 1.15rem;
    }

    .filter-card-header {
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.35rem;
    }
}

@media (max-width: 768px) {
    .library-filter-card {
        padding: 1.25rem 1.35rem;
    }

    .library-filter-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .books-grid {
        grid-template-columns: 1fr;
        gap: 1.25rem;
    }

    .book-cover-wrapper {
        height: 240px;
    }
}

@media (max-width: 480px) {
    .filter-card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.65rem;
    }

    .btn-reset-filters {
        align-self: flex-start;
    }
}