/* ========================================
   BOOKS PAGE SPECIFIC STYLES
   ======================================== */

/* Reading Progress Bar */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 4px;
    background: var(--text-dark);
    z-index: 1000;
    transition: width 0.1s ease;
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

@keyframes countUp {
    from {
        opacity: 0;
        transform: scale(0.5);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes flipCard {
    0% {
        transform: rotateY(0);
    }
    100% {
        transform: rotateY(180deg);
    }
}

/* Reading Stats */
.reading-stats {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-white);
}

.stat-number.counting {
    animation: countUp 0.5s ease-out;
}

/* Search and Controls */
.book-controls {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-white);
    border-bottom: 2px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.controls-wrapper {
    display: flex;
    gap: var(--spacing-md);
    align-items: center;
    flex-wrap: wrap;
}

.search-box {
    flex: 1;
    min-width: 250px;
    position: relative;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    border: 2px solid var(--border-color);
    background-color: var(--bg-white);
    font-family: var(--font-sans);
    font-size: 1rem;
    color: var(--text-dark);
    transition: border-color 0.2s ease;
}

.search-box input:focus {
    outline: none;
    border-color: var(--text-dark);
}

.search-box input::placeholder {
    color: var(--text-dark);
    opacity: 0.5;
}

.search-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    pointer-events: none;
}

.view-toggle {
    display: flex;
    gap: 0;
    border: 2px solid var(--border-color);
}

.view-btn {
    padding: 0.75rem 1rem;
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: none;
    border-right: 2px solid var(--border-color);
    font-size: 1.25rem;
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.view-btn:last-child {
    border-right: none;
}

.view-btn:hover {
    background-color: var(--bg-hover);
}

.view-btn.active {
    background-color: var(--text-dark);
    color: var(--bg-white);
}

/* Book Filters */
.book-filters,
.status-filters {
    padding: var(--spacing-lg) 0;
    background-color: var(--bg-white);
    border-bottom: 2px solid var(--border-color);
}

.filter-heading {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    text-align: center;
    color: var(--text-dark);
}

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

.filter-btn {
    padding: 0.625rem 1.5rem;
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    cursor: pointer;
    transition: none;
    position: relative;
    text-transform: uppercase;
}

.filter-btn:hover {
    border-color: var(--text-dark);
}

.filter-btn.active {
    background-color: var(--text-dark);
    color: var(--bg-white);
    border-color: var(--text-dark);
    font-weight: 600;
}

.filter-btn.active::before {
    content: '▪';
    margin-right: 0.5rem;
}


/* Books Section */
.books-section {
    padding: var(--spacing-2xl) 0;
    background-color: var(--bg-light);
}

/* Books Grid */
.books-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-2xl);
}

/* Book Item - Simple Card */
.book-item {
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    padding: var(--spacing-lg);
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.book-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.book-item.hidden {
    display: none;
}

.book-item:hover {
    border-color: var(--text-dark);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Book Cover */
.book-cover {
    margin-bottom: var(--spacing-md);
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 200px;
    flex-shrink: 0;
}

.book-cover img {
    width: auto;
    max-width: 140px;
    height: auto;
    max-height: 200px;
    border: 2px solid var(--border-color);
    object-fit: cover;
    display: block;
    box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.1);
    transition: transform 0.2s ease, filter 0.3s ease;
    filter: grayscale(100%) contrast(1.1);
}

.book-cover img:hover {
    transform: translateY(-2px);
    box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.15);
    filter: grayscale(0%) contrast(1);
}

.cover-placeholder {
    width: 140px;
    height: 200px;
    font-size: 3.5rem;
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Book Info Section */
.book-info {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.book-title {
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
    font-weight: 600;
}

.book-author {
    color: var(--text-dark);
    font-style: italic;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
}

/* Star Rating */
.book-rating {
    margin-bottom: var(--spacing-sm);
}

.star {
    color: var(--text-dark);
    font-size: 1.25rem;
}

.star.filled {
    color: var(--text-dark);
}

/* Book Review */
.book-review {
    color: var(--text-dark);
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

/* Open Library Link */
.book-link {
    display: inline-block;
    margin-top: var(--spacing-sm);
    color: var(--text-dark);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 2px;
    transition: border-color 0.2s ease;
}

.book-link:hover {
    border-bottom-color: var(--text-dark);
}

/* Book Meta Information */
.book-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-top: var(--spacing-sm);
}

/* Book Category Badge */
.book-category,
.book-status,
.book-date,
.book-pages {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    border-radius: 0;
    font-size: 0.875rem;
    font-weight: 600;
}

.book-status {
    font-weight: 500;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.book-date,
.book-pages {
    font-weight: 400;
    opacity: 0.7;
}

/* Skeleton Loaders */
.skeleton-card {
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    padding: var(--spacing-lg);
    animation: fadeInUp 0.5s ease-out;
}

.skeleton-cover,
.skeleton-title,
.skeleton-author,
.skeleton-text {
    background: linear-gradient(
        90deg,
        var(--bg-white) 0%,
        var(--bg-hover) 50%,
        var(--bg-white) 100%
    );
    background-size: 1000px 100%;
    animation: shimmer 2s infinite;
}

.skeleton-cover {
    width: 150px;
    height: 220px;
    margin: 0 auto var(--spacing-md);
    border: 2px solid var(--border-color);
}

.skeleton-title {
    height: 1.5rem;
    margin-bottom: var(--spacing-xs);
    width: 80%;
}

.skeleton-author {
    height: 1rem;
    margin-bottom: var(--spacing-sm);
    width: 60%;
}

.skeleton-text {
    height: 1rem;
    margin-bottom: var(--spacing-xs);
    width: 100%;
}

.skeleton-text.short {
    width: 70%;
}

/* Scroll Animations */
.book-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.book-item.visible {
    opacity: 1;
    transform: translateY(0);
}

/* List View */
.books-grid.list-view {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

.books-grid.list-view .book-item {
    flex-direction: row;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.books-grid.list-view .book-cover {
    flex-shrink: 0;
    min-height: auto;
    margin-bottom: 0;
}

.books-grid.list-view .book-cover img,
.books-grid.list-view .cover-placeholder {
    max-width: 100px;
    max-height: 150px;
    width: 100px;
    height: 150px;
}

.books-grid.list-view .book-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.books-grid.list-view .book-title {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.books-grid.list-view .book-author {
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.books-grid.list-view .book-review {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.85rem;
}

.books-grid.list-view .book-meta {
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

/* Loading and Error States */
.loading-message,
.error-message {
    text-align: center;
    padding: var(--spacing-xl);
    font-size: 1.125rem;
    color: var(--text-dark);
}

.error-message {
    color: #d32f2f;
}

/* Responsive Design */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .books-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: var(--spacing-lg);
    }
    
    .book-item {
        height: auto;
    }
    
    /* List view on mobile - stack vertically */
    .books-grid.list-view .book-item {
        flex-direction: column;
    }
    
    .books-grid.list-view .book-cover {
        align-self: center;
    }
    
    .controls-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    
    .search-box {
        min-width: 100%;
    }
    
    .view-toggle {
        align-self: center;
    }
    
    .filter-buttons {
        gap: var(--spacing-xs);
    }
    
    .filter-btn {
        padding: 0.5rem 1rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .books-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .book-item {
        height: 580px;
    }
    
    .book-filters .container {
        gap: var(--spacing-xs);
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .reading-progress-bar {
        height: 3px;
    }
    
    .book-cover img {
        max-width: 120px;
        max-height: 180px;
    }
    
    .cover-placeholder {
        width: 120px;
        height: 180px;
    }
}

/* ========================================
   BOOKS SECTION HEADER & TOGGLE
   ======================================== */

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

.section-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin: 0;
}

.toggle-books-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    border-radius: 0;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.toggle-books-btn:hover {
    background-color: var(--text-dark);
    color: var(--bg-white);
    border-color: var(--text-dark);
}

.toggle-books-btn .material-symbols-sharp {
    font-size: 1.2rem;
    transition: transform 0.3s ease;
}

.toggle-books-btn.expanded .material-symbols-sharp {
    transform: rotate(180deg);
}

/* ========================================
   BOOK TRIVIA SECTION
   ======================================== */

.trivia-section {
    padding: var(--spacing-xl) 0 var(--spacing-2xl) 0;
    background-color: var(--bg-white);
    border-top: 2px solid var(--border-color);
}

.trivia-container {
    max-width: 800px;
    margin: 0 auto;
}

/* Hidden utility class for screen transitions */
.hidden {
    display: none !important;
}

/* Start Screen */
.trivia-start {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    border: 2px solid var(--border-color);
    background-color: var(--bg-gray);
}

.trivia-description {
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xl);
    line-height: 1.6;
}

.trivia-btn-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background-color: var(--text-dark);
    color: var(--bg-white);
    border: 2px solid var(--text-dark);
    border-radius: 0;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
}

.trivia-btn-primary:hover {
    background-color: var(--bg-white);
    color: var(--text-dark);
}

.trivia-btn-primary .material-symbols-sharp {
    font-size: 1.4rem;
}

.trivia-btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    border-radius: 0;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
    margin-top: var(--spacing-md);
}

.trivia-btn-secondary:hover {
    background-color: var(--text-dark);
    color: var(--bg-white);
    border-color: var(--text-dark);
}

/* Quiz Screen */
.trivia-quiz {
    border: 2px solid var(--border-color);
    background-color: var(--bg-gray);
}

.trivia-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 2px solid var(--border-color);
    background-color: var(--bg-white);
}

.trivia-progress,
.trivia-score {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-dark);
}

.trivia-question-card {
    padding: var(--spacing-xl);
}

.trivia-difficulty {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.trivia-question {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xl);
    line-height: 1.5;
    font-weight: 600;
}

.trivia-answers {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.answer-btn {
    padding: var(--spacing-md);
    background-color: var(--bg-white);
    color: var(--text-dark);
    border: 2px solid var(--border-color);
    border-radius: 0;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--font-sans);
    text-align: left;
}

.answer-btn:hover:not(:disabled) {
    background-color: var(--text-dark);
    color: var(--bg-white);
    border-color: var(--text-dark);
}

.answer-btn.correct {
    background-color: #22c55e;
    color: white;
    border-color: #22c55e;
}

.answer-btn.incorrect {
    background-color: #ef4444;
    color: white;
    border-color: #ef4444;
}

.answer-btn:disabled {
    cursor: not-allowed;
}

.trivia-feedback {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-lg);
    background-color: var(--bg-white);
    border: 2px solid var(--border-color);
    text-align: center;
}

.feedback-text {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.feedback-text.correct {
    color: #22c55e;
}

.feedback-text.incorrect {
    color: #ef4444;
}

/* Results Screen */
.trivia-results {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-lg);
    border: 2px solid var(--border-color);
    background-color: var(--bg-gray);
}

.results-title {
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

.results-score {
    margin-bottom: var(--spacing-md);
}

.score-value {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-dark);
}

.score-total {
    font-size: 2rem;
    color: var(--text-muted);
}

.results-message {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-xl);
}

.results-actions {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

/* Responsive Trivia */
@media (max-width: 768px) {
    .trivia-question {
        font-size: 1.1rem;
    }
    
    .answer-btn {
        padding: var(--spacing-sm);
        font-size: 0.95rem;
    }
    
    .score-value {
        font-size: 3rem;
    }
    
    .trivia-header {
        padding: var(--spacing-sm) var(--spacing-md);
    }
}