/* ==============================================
   LIBRARY PAGE STYLES
   ============================================== */

/* Loading State */
.library-loading {
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem 2rem 2rem;
    background-color: var(--bg-color, #ffffff);
}

.library-loading-spinner {
    width: 64px;
    height: 64px;
    margin-bottom: 1.5rem;
    border: 5px solid rgba(0, 180, 255, 0.2);
    border-top-color: var(--primary-color, #00b4ff);
    border-radius: 50%;
    animation: library-spin 0.8s linear infinite;
}

@keyframes library-spin {
    to { transform: rotate(360deg); }
}

.library-loading-text {
    margin: 0;
    color: #64748b;
    font-size: 1rem;
}

/* Page Layout */
.page-library {
    min-height: 100vh;
    min-height: 100dvh;
    background-color: var(--bg-color, #ffffff);
}

.library-content {
    width: 100%;
    margin: 0;
}

/* ==============================================
   LIBRARY HEADER SECTION
   ============================================== */

.library-header-section {
    padding: 8rem 0 2rem 0;
    background: linear-gradient(135deg, rgba(0, 180, 255, 0.05) 0%, rgba(0, 180, 255, 0.02) 100%);
    width: 100%;
    margin: 0;
}

.library-header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.library-header-content {
    text-align: center;
}

.library-title-group {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.library-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-color, #00b4ff) 0%, #0174b1 100%);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    box-shadow: 0 4px 16px rgba(0, 180, 255, 0.3);
}

.library-title {
    font-size: 2.5rem;
    font-weight: 900;
    color: #0f172a;
    margin: 0;
    letter-spacing: -0.02em;
}

.library-subtitle {
    font-size: 1.1rem;
    color: #64748b;
    margin: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==============================================
   LIBRARY CONTROLS SECTION
   ============================================== */

.library-controls-section {
    padding: 1.5rem 0;
    background: transparent;
    position: sticky;
    top: 70px;
    z-index: 100;
    background: var(--bg-color, #ffffff);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
}

.library-controls-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

.library-controls-row {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* Filter Tabs */
.library-filter-tabs {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
    padding: 0.5rem;
    background: #f1f5f9;
    border-radius: 16px;
}

.library-filter-tab {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    background: transparent;
    border: none;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #64748b;
    cursor: pointer;
    transition: all 0.2s ease;
}

.library-filter-tab:hover {
    background: white;
    color: #0f172a;
}

.library-filter-tab.active {
    background: white;
    color: var(--primary-color, #00b4ff);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.library-filter-tab i {
    font-size: 1.1rem;
}

/* Search Row */
.library-search-row {
    display: flex;
    gap: 1rem;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

/* Category Dropdown */
.library-category-dropdown {
    position: relative;
    min-width: 200px;
}

.library-category-select {
    width: 100%;
    padding: 0.75rem 2.5rem 0.75rem 1rem;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 0.95rem;
    font-weight: 600;
    color: #0f172a;
    cursor: pointer;
    appearance: none;
    transition: all 0.2s ease;
}

.library-category-select:focus {
    outline: none;
    border-color: var(--primary-color, #00b4ff);
}

.library-dropdown-icon {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #64748b;
    pointer-events: none;
}

/* Search Bar */
.library-search-bar {
    flex: 1;
    max-width: 480px;
    min-width: 280px;
    position: relative;
    display: flex;
    align-items: center;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 50px;
    padding: 0 1rem;
    transition: all 0.2s ease;
}

.library-search-bar:focus-within {
    border-color: var(--primary-color, #00b4ff);
    box-shadow: 0 0 0 3px rgba(0, 180, 255, 0.1);
}

.library-search-icon {
    color: #94a3b8;
    font-size: 1.1rem;
    margin-right: 0.75rem;
}

.library-search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.75rem 0;
    font-size: 0.95rem;
    color: #0f172a;
}

.library-search-input:focus {
    outline: none;
}

.library-search-input::placeholder {
    color: #94a3b8;
}

.library-search-clear {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: #f1f5f9;
    border: none;
    border-radius: 50%;
    color: #64748b;
    cursor: pointer;
    transition: all 0.2s ease;
}

.library-search-clear:hover {
    background: #e2e8f0;
    color: #0f172a;
}

/* ==============================================
   LIBRARY BOOKS SECTION
   ============================================== */

.library-books-section {
    padding: 2rem 0 4rem 0;
}

.library-books-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ==============================================
   BOOK DISPLAY COMPONENT
   ============================================== */

/* Loading */
.book-display-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
}

.book-display-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(0, 180, 255, 0.2);
    border-top-color: var(--primary-color, #00b4ff);
    border-radius: 50%;
    animation: library-spin 0.8s linear infinite;
    margin-bottom: 1rem;
}

.book-display-spinner.small {
    width: 24px;
    height: 24px;
    border-width: 3px;
    margin-bottom: 0;
}

.book-display-loading-text {
    color: #64748b;
    font-size: 1rem;
    margin: 0;
}

/* Empty State */
.book-display-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    text-align: center;
    max-width: 500px;
    margin: 0 auto;
}

.book-display-empty-icon {
    width: 80px;
    height: 80px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(0, 180, 255, 0.1), rgba(0, 180, 255, 0.05));
    border-radius: 50%;
    border: 2px solid rgba(0, 180, 255, 0.2);
}

.book-display-empty-icon i {
    font-size: 2.5rem;
    color: var(--primary-color, #00b4ff);
}

.book-display-empty-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #0f172a;
    margin: 0 0 0.75rem 0;
}

.book-display-empty-description {
    font-size: 1rem;
    color: #64748b;
    line-height: 1.6;
    margin: 0 0 2rem 0;
}

.book-display-empty-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
}

.book-display-empty-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.75rem;
    border-radius: 12px;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.book-display-empty-btn.primary {
    background: var(--primary-color, #00b4ff);
    color: white;
    box-shadow: 0 4px 12px rgba(0, 180, 255, 0.3);
}

.book-display-empty-btn.primary:hover {
    background: #0096d9;
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 180, 255, 0.4);
}

/* Book Grid - Larger, tighter spacing like old version */
.book-display-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 0.75rem;
    justify-items: center;
}

.book-display-item {
    width: 100%;
    max-width: 280px;
}

/* Loading More */
.book-display-loading-more {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: #64748b;
    font-size: 0.95rem;
}

/* End of Results */
.book-display-end {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 3rem 2rem;
    margin-top: 2rem;
}

.book-display-end-line {
    flex: 1;
    max-width: 100px;
    height: 1px;
    background: linear-gradient(to right, transparent, #e2e8f0, transparent);
}

.book-display-end-text {
    color: #94a3b8;
    font-size: 0.9rem;
    font-weight: 500;
}

/* ==============================================
   BOOK BADGES
   ============================================== */

.book-progress-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: linear-gradient(135deg, #00b4ff, #0174b1);
    color: white;
    padding: 0.4rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(0, 180, 255, 0.3);
}

.book-completed-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    padding: 0.4rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

.book-free-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: white;
    padding: 0.4rem 0.75rem;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

/* ==============================================
   DARK MODE SUPPORT
   ============================================== */

body.dark-mode .library-loading {
    background-color: #0f172a;
}

body.dark-mode .page-library {
    background-color: #0f172a;
}

body.dark-mode .library-header-section {
    background: linear-gradient(135deg, rgba(0, 180, 255, 0.08) 0%, rgba(0, 180, 255, 0.03) 100%);
}

body.dark-mode .library-title {
    color: #f1f5f9;
}

body.dark-mode .library-subtitle {
    color: #94a3b8;
}

body.dark-mode .library-controls-section {
    background: #0f172a;
    border-bottom-color: rgba(255, 255, 255, 0.1);
}

body.dark-mode .library-filter-tabs {
    background: #1e293b;
}

body.dark-mode .library-filter-tab {
    color: #94a3b8;
}

body.dark-mode .library-filter-tab:hover {
    background: #334155;
    color: #f1f5f9;
}

body.dark-mode .library-filter-tab.active {
    background: #334155;
    color: #4fc3f7;
}

body.dark-mode .library-category-select {
    background: #1e293b;
    border-color: #334155;
    color: #f1f5f9;
}

body.dark-mode .library-category-select:focus {
    border-color: #4fc3f7;
}

body.dark-mode .library-dropdown-icon {
    color: #94a3b8;
}

body.dark-mode .library-search-bar {
    background: #1e293b;
    border-color: #334155;
}

body.dark-mode .library-search-bar:focus-within {
    border-color: #4fc3f7;
    box-shadow: 0 0 0 3px rgba(79, 195, 247, 0.1);
}

body.dark-mode .library-search-input {
    color: #f1f5f9;
}

body.dark-mode .library-search-input::placeholder {
    color: #64748b;
}

body.dark-mode .library-search-clear {
    background: #334155;
    color: #94a3b8;
}

body.dark-mode .library-search-clear:hover {
    background: #475569;
    color: #f1f5f9;
}

body.dark-mode .book-display-empty-title {
    color: #f1f5f9;
}

body.dark-mode .book-display-empty-description {
    color: #94a3b8;
}

body.dark-mode .book-display-empty-icon {
    background: linear-gradient(135deg, rgba(79, 195, 247, 0.15), rgba(79, 195, 247, 0.08));
    border-color: rgba(79, 195, 247, 0.3);
}

body.dark-mode .book-display-empty-icon i {
    color: #4fc3f7;
}

body.dark-mode .book-display-empty-btn.primary {
    background: #4fc3f7;
    color: #0f172a;
}

body.dark-mode .book-display-empty-btn.primary:hover {
    background: #29b6f6;
}

body.dark-mode .book-display-end-text {
    color: #64748b;
}

body.dark-mode .book-display-end-line {
    background: linear-gradient(to right, transparent, #334155, transparent);
}

/* ==============================================
   RESPONSIVE STYLES
   ============================================== */

@media (max-width: 992px) {
    .library-header-section {
        padding: 7rem 0 1.5rem 0;
    }

    .library-title {
        font-size: 2rem;
    }

    .library-icon {
        width: 48px;
        height: 48px;
        font-size: 1.5rem;
    }

    .library-filter-tabs {
        padding: 0.35rem;
    }

    .library-filter-tab {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }

    .library-filter-tab span {
        display: none;
    }

    .library-filter-tab i {
        font-size: 1.25rem;
    }

    .book-display-grid {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
        gap: 0.6rem;
    }
}

@media (max-width: 768px) {
    .library-header-section {
        padding: 4.5rem 0 0.75rem 0;
    }

    .library-header-container {
        padding: 0 1rem;
    }

    .library-title-group {
        flex-direction: column;
        gap: 0.75rem;
    }

    .library-title {
        font-size: 1.75rem;
    }

    .library-controls-section {
        top: 60px;
        padding: 1rem 0;
    }

    .library-controls-container {
        padding: 0 1rem;
    }

    .library-search-row {
        flex-direction: column;
        width: 100%;
    }

    .library-category-dropdown {
        width: 100%;
    }

    .library-search-bar {
        width: 100%;
        max-width: none;
    }

    .library-books-container {
        padding: 0 0.5rem;
    }

    .book-display-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
        gap: 0.35rem;
    }

    .book-display-item {
        max-width: none;
    }

    .book-display-empty {
        padding: 3rem 1rem;
    }

    .book-display-empty-icon {
        width: 64px;
        height: 64px;
    }

    .book-display-empty-icon i {
        font-size: 2rem;
    }

    .book-display-empty-title {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .library-header-section {
        padding: 4rem 0 0.5rem 0;
    }

    .library-title {
        font-size: 1.5rem;
    }

    .library-subtitle {
        font-size: 0.95rem;
    }

    .library-filter-tabs {
        gap: 0.25rem;
    }

    .library-filter-tab {
        padding: 0.5rem 0.75rem;
    }

    .library-filter-tab i {
        font-size: 1.1rem;
    }

    .book-display-grid {
        gap: 0.3rem;
    }

    .library-books-section {
        padding: 1rem 0 2rem 0;
    }
}