/* ===== VARIÁVEIS ===== */
:root {
    --primary: #0066cc;
    --primary-dark: #0052a3;
    --primary-light: rgba(0, 102, 204, 0.1);
    --text: #1a1a1a;
    --text-secondary: #666;
    --text-light: #999;
    --background: #ffffff;
    --background-alt: #f9f9f9;
    --border: #eaeaea;
    --border-hover: #ccc;
    --shadow: rgba(0, 0, 0, 0.1);
    --shadow-light: rgba(0, 0, 0, 0.05);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
}

/* ===== BASE ===== */
.library-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
}

/* ===== HEADER ===== */
.library-header {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    border-bottom: 1px solid var(--border);
    margin-bottom: var(--spacing-lg);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.header-main h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text);
    line-height: 1.2;
}

.header-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0;
    max-width: 500px;
}

.header-stats {
    flex-shrink: 0;
}

.stat-badge {
    background: var(--primary-light);
    color: var(--primary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-lg);
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    border: 1px solid rgba(0, 102, 204, 0.2);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 500;
}

/* ===== FILTROS ===== */
.filters-section {
    margin-bottom: var(--spacing-lg);
}

.filters-toggle {
    margin-bottom: var(--spacing-sm);
}

.filters-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--background-alt);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.filters-toggle-btn:hover {
    background: var(--border);
    border-color: var(--border-hover);
}

.filters-toggle-btn .fa-chevron-down {
    transition: transform 0.3s ease;
}

.filters-toggle-btn .fa-chevron-down.rotated {
    transform: rotate(180deg);
}

.filters-container {
    display: none;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-top: var(--spacing-sm);
    box-shadow: 0 4px 12px var(--shadow-light);
}

.filters-container.show {
    display: block;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.filters-form {
    width: 100%;
}

.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.filter-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
}

.filter-label i {
    color: var(--text-secondary);
    font-size: 0.875rem;
    width: 16px;
}

.filter-input,
.filter-select {
    padding: 0.75rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    color: var(--text);
    background: var(--background);
    transition: all 0.2s ease;
}

.filter-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.filter-input::placeholder {
    color: var(--text-light);
}

.filters-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
    flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.minimal-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.75rem 1.5rem;
    background: var(--background);
    color: var(--text);
    text-decoration: none;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.minimal-btn:hover {
    background: var(--background-alt);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.minimal-btn.primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary-dark);
}

.minimal-btn.primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary);
}

/* ===== ACTIVE FILTERS ===== */
.active-filters {
    background: var(--background-alt);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.active-filters-header {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text);
    margin-bottom: var(--spacing-sm);
}

.active-filters-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.active-filter-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 0.5rem 0.75rem;
    background: var(--background);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
}

.remove-filter {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--border);
    color: var(--text-secondary);
    border-radius: 50%;
    text-decoration: none;
    font-size: 0.75rem;
    transition: all 0.2s ease;
}

.remove-filter:hover {
    background: var(--primary);
    color: white;
}

/* ===== CATEGORIES SECTION ===== */
.categories-section {
    margin-bottom: var(--spacing-xl);
}

.categories-section h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-lg) 0;
    color: var(--text);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.category-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text);
    transition: all 0.2s ease;
}

.category-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    flex-shrink: 0;
}

.category-info {
    flex: 1;
    min-width: 0;
}

.category-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text);
}

.category-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ===== BOOKS SECTION ===== */
.books-section {
    margin-bottom: var(--spacing-xl);
}

.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

@media (max-width: 768px) {
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-sm);
    }
}

/* ===== BOOK CARDS ===== */
.book-card {
    display: flex;
    flex-direction: column;
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    text-decoration: none;
    color: var(--text);
    transition: all 0.3s ease;
    height: 100%;
}

.book-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 24px var(--shadow);
    transform: translateY(-4px);
}

.book-card-cover {
    position: relative;
    height: 200px;
    overflow: hidden;
}

.book-cover-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.cover-placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1.5rem;
}

.book-badges {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    right: var(--spacing-sm);
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.book-status,
.book-condition {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.25rem 0.5rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 500;
    backdrop-filter: blur(4px);
    background: rgba(255, 255, 255, 0.9);
}

.book-status.available {
    color: #065f46;
}

.book-status.borrowed {
    color: #92400e;
}

.book-status.reserved {
    color: #0d6efd;
}

.book-condition.new {
    color: #198754;
}

.book-condition.good {
    color: #0d6efd;
}

.book-condition.regular {
    color: #6c757d;
}

.book-card-info {
    padding: var(--spacing-md);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text);
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.book-author {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-sm) 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-meta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.meta-item i {
    font-size: 0.875rem;
}

.book-categories {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: auto;
}

.category-tag {
    padding: 0.25rem 0.5rem;
    background: var(--background-alt);
    color: var(--text-secondary);
    font-size: 0.75rem;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.book-card-footer {
    padding: var(--spacing-md);
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.view-details {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.book-card:hover .view-details {
    color: var(--primary-dark);
}

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    margin: var(--spacing-xl) 0;
}

.empty-icon {
    font-size: 4rem;
    color: var(--border);
    margin-bottom: var(--spacing-lg);
}

.empty-content h2 {
    font-size: 1.75rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-sm) 0;
    color: var(--text);
}

.empty-content p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-lg) 0;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.empty-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

/* ===== READERS SECTION ===== */
.readers-section {
    margin-bottom: var(--spacing-xl);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    color: var(--text);
}

.view-more {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.view-more:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.readers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.reader-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--background);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
}

.reader-card:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow);
}

.reader-avatar {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.reader-info {
    flex: 1;
    min-width: 0;
}

.reader-info h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-xs) 0;
    color: var(--text);
}

.reader-location {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-sm) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.reader-stats {
    display: flex;
    gap: var(--spacing-md);
}

.reader-stats .stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.reader-profile {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    white-space: nowrap;
}

.reader-profile:hover {
    color: var(--primary-dark);
}

/* ===== RESPONSIVIDADE ===== */
@media (max-width: 768px) {
    .library-header {
        padding: var(--spacing-lg) 0;
    }
    
    .header-content {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .header-main h1 {
        font-size: 2rem;
    }
    
    .stat-badge {
        align-self: flex-start;
    }
    
    .filters-grid {
        grid-template-columns: 1fr;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .readers-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
}

@media (max-width: 480px) {
    .book-card-cover {
        height: 160px;
    }
    
    .reader-card {
        flex-direction: column;
        text-align: center;
    }
    
    .reader-info {
        width: 100%;
    }
    
    .reader-stats {
        justify-content: center;
    }
}