/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
  --takwin-primary: #2E7CE4;
  --takwin-secondary: #4CAF50;
  --takwin-accent: #66BB6A;
  --takwin-light: #f8f9fa;
  --takwin-dark: #212529;
  --takwin-white: #ffffff;
  --takwin-gray: #6c757d;
  --takwin-border: #dee2e6;
  --takwin-success: #4CAF50;
  --takwin-info: #2E7CE4;
  --takwin-warning: #FF9800;
  --takwin-error: #f44336;
  --takwin-blue-light: #E3F2FD;
  --takwin-green-light: #E8F5E8;
  --takwin-blue-dark: #1976D2;
  --takwin-green-dark: #388E3C;
  --takwin-primary-light: #5A9AE8;
  --takwin-primary-lighter: #87C1ED;
  --takwin-primary-lightest: #B4D8F2;
  --takwin-secondary-light: #6BC76F;
  --takwin-secondary-lighter: #8DD691;
  --takwin-success-light: #6BC76F;
  --takwin-warning-light: #FFB74D;
  --takwin-error-light: #F77064;
  --takwin-blue-lighter: #F3F8FF;
  --takwin-green-lighter: #F1F8F1;
  --takwin-warning-bg: #FFF8E1;
  --takwin-error-bg: #FFEBEE;
  --border-radius: 12px;
  --border-radius-lg: 16px;
  --border-radius-xl: 20px;
  --transition-fast: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --shadow-sm: 0 2px 4px rgba(46, 124, 228, 0.08);
  --shadow-md: 0 4px 12px rgba(46, 124, 228, 0.1);
  --shadow-lg: 0 8px 16px rgba(46, 124, 228, 0.15);
  --shadow-xl: 0 12px 24px rgba(46, 124, 228, 0.2);
  /* Layout properties */
  --border-radius: 8px;
  --border-radius-lg: 12px;
  --box-shadow: 0 4px 12px rgba(46, 124, 228, 0.1);
  --box-shadow-sm: 0 2px 8px rgba(46, 124, 228, 0.08);
  --box-shadow-lg: 0 8px 25px rgba(46, 124, 228, 0.15);
  --transition-fast: all 0.3s ease;
  --header-height: 80px;
  /* Gradients inspired by logo */
  --gradient-primary: linear-gradient(135deg, #2E7CE4 0%, #4CAF50 100%);
  --gradient-light: linear-gradient(135deg, #E3F2FD 0%, #E8F5E8 100%);
}

/* ============================================
   LIBRARY PAGE STYLES
   ============================================ */
.library-page {
    background: var(--takwin-light);
    min-height: 100vh;
}

    /* Page Header */
    .library-page .breadcrumb-section {
        background: white;
        padding: 1rem 0;
        border-bottom: 1px solid var(--takwin-border);
    }

    .library-page .page-header {
        background: var(--gradient-primary);
        color: white;
        padding: 3rem 0;
    }

    .library-page .header-content {
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 2rem;
    }

    .library-page .header-main {
        flex: 1;
    }

    .library-page .page-title {
        font-size: 2.5rem;
        font-weight: 700;
        margin-bottom: 1rem;
        display: flex;
        align-items: center;
        gap: 1rem;
    }

        .library-page .page-title i {
            color: var(--takwin-accent);
        }

    .library-page .page-subtitle {
        font-size: 1.1rem;
        color: rgba(255,255,255,0.9);
        line-height: 1.6;
        max-width: 600px;
    }

    .library-page .header-stats {
        display: flex;
        gap: 2rem;
        flex-wrap: wrap;
    }

        .library-page .header-stats .stat-item {
            text-align: center;
            padding: 1rem;
            background: rgba(255,255,255,0.1);
            border-radius: var(--border-radius);
            min-width: 100px;
            backdrop-filter: blur(10px);
        }

        .library-page .header-stats .stat-value {
            font-size: 2rem;
            font-weight: 700;
            color: var(--takwin-accent);
            line-height: 1;
        }

        .library-page .header-stats .stat-label {
            font-size: 0.9rem;
            color: rgba(255,255,255,0.8);
            margin-top: 0.25rem;
        }

    .library-page .main-content {
        padding: 3rem 0;
    }

    /* ============================================
   SIDEBAR STYLES
   ============================================ */
    .library-page .library-sidebar {
        position: sticky;
        top: calc(var(--header-height) + 2rem);
        display: flex;
        flex-direction: column;
        gap: 1.5rem;
    }

    .library-page .filter-card,
    .library-page .recent-card {
        background: white;
        border: 1px solid var(--takwin-border);
        border-radius: var(--border-radius);
        box-shadow: var(--box-shadow-sm);
        overflow: hidden;
    }

    .library-page .filter-header,
    .library-page .recent-header {
        background: var(--takwin-blue-light);
        padding: 1rem 1.5rem;
        border-bottom: 1px solid var(--takwin-border);
        display: flex;
        align-items: center;
        gap: 0.75rem;
    }

        .library-page .filter-header i,
        .library-page .recent-header i {
            color: var(--takwin-primary);
            font-size: 1rem;
        }

        .library-page .filter-header h4,
        .library-page .recent-header h4 {
            margin: 0;
            font-size: 1rem;
            font-weight: 600;
            color: var(--takwin-dark);
        }

    .library-page .filter-body,
    .library-page .recent-body {
        padding: 1.5rem;
    }

    /* Search */
    .library-page .search-group {
        position: relative;
    }

    .library-page .search-input {
        width: 100%;
        padding: 0.75rem 3rem 0.75rem 1rem;
        border: 2px solid var(--takwin-border);
        border-radius: var(--border-radius);
        font-size: 0.95rem;
        transition: var(--transition-fast);
    }

        .library-page .search-input:focus {
            outline: none;
            border-color: var(--takwin-primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 228, 0.1);
        }

    .library-page .search-btn {
        position: absolute;
        left: 10px;
        top: 50%;
        transform: translateY(-50%);
        background: none;
        border: none;
        color: var(--takwin-gray);
        cursor: pointer;
        padding: 0.5rem;
        border-radius: 4px;
        transition: var(--transition-fast);
    }

        .library-page .search-btn:hover {
            color: var(--takwin-primary);
            background: var(--takwin-blue-light);
        }

    /* Filter Options */
    .library-page .filter-option {
        margin-bottom: 1rem;
    }

        .library-page .filter-option:last-child {
            margin-bottom: 0;
        }

        .library-page .filter-option input[type="radio"] {
            display: none;
        }

        .library-page .filter-option label {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem 1rem;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition-fast);
            border: 1px solid transparent;
        }

            .library-page .filter-option label:hover {
                background: var(--takwin-blue-light);
            }

        .library-page .filter-option input[type="radio"]:checked + label {
            background: rgba(46, 124, 228, 0.1);
            border-color: var(--takwin-primary);
            color: var(--takwin-primary);
        }

    .library-page .option-text {
        font-weight: 500;
    }

    .library-page .option-count {
        font-size: 0.85rem;
        color: var(--takwin-gray);
        background: var(--takwin-light);
        padding: 0.25rem 0.5rem;
        border-radius: 12px;
        min-width: 24px;
        text-align: center;
    }

    .library-page .filter-option input[type="radio"]:checked + label .option-count {
        background: var(--takwin-primary);
        color: white;
    }

    /* Recent Items */
    .library-page .recent-item {
        display: flex;
        align-items: center;
        gap: 1rem;
        padding: 0.75rem;
        border-radius: var(--border-radius);
        cursor: pointer;
        transition: var(--transition-fast);
        margin-bottom: 0.5rem;
    }

        .library-page .recent-item:hover {
            background: var(--takwin-blue-light);
        }

    .library-page .recent-icon {
        width: 40px;
        height: 40px;
        background: rgba(244, 67, 54, 0.1);
        border-radius: var(--border-radius);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #f44336;
        flex-shrink: 0;
    }

    .library-page .recent-info {
        flex: 1;
        min-width: 0;
    }

        .library-page .recent-info h5 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--takwin-dark);
            margin-bottom: 0.25rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .library-page .recent-info small {
            font-size: 0.8rem;
            color: var(--takwin-gray);
            display: block;
            line-height: 1.3;
        }

    .library-page .recent-date {
        color: var(--takwin-primary) !important;
    }

    /* ============================================
   LIBRARY CONTENT
   ============================================ */
    .library-page .library-content {
        background: white;
        border-radius: var(--border-radius-lg);
        box-shadow: var(--box-shadow-sm);
        overflow: hidden;
    }

    .library-page .library-header {
        padding: 2rem;
        border-bottom: 1px solid var(--takwin-border);
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 1rem;
    }

    .library-page .library-title h2 {
        color: var(--takwin-dark);
        font-size: 1.5rem;
        font-weight: 600;
        margin-bottom: 0.25rem;
    }

    .library-page .library-title p {
        color: var(--takwin-gray);
        margin: 0;
        font-size: 0.9rem;
    }

    .library-page .view-controls {
        display: flex;
        align-items: center;
        gap: 1rem;
    }

    .library-page .sort-dropdown .form-select {
        border: 1px solid var(--takwin-border);
        border-radius: var(--border-radius);
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
        min-width: 150px;
        background: white;
        color: var(--takwin-dark);
    }

        .library-page .sort-dropdown .form-select:focus {
            outline: none;
            border-color: var(--takwin-primary);
            box-shadow: 0 0 0 3px rgba(46, 124, 228, 0.1);
        }

    .library-page .view-mode-toggles {
        display: flex;
        border: 1px solid var(--takwin-border);
        border-radius: var(--border-radius);
        overflow: hidden;
    }

    .library-page .view-btn {
        background: white;
        border: none;
        padding: 0.5rem 0.75rem;
        cursor: pointer;
        transition: var(--transition-fast);
        color: var(--takwin-gray);
        font-size: 0.9rem;
    }

        .library-page .view-btn:hover {
            background: var(--takwin-blue-light);
            color: var(--takwin-primary);
        }

        .library-page .view-btn.active {
            background: var(--takwin-primary);
            color: white;
        }

    /* ============================================
   COURSE SECTIONS
   ============================================ */
    .library-page .course-section {
        margin-bottom: 3rem;
        padding: 2rem;
    }

    .library-page .course-header {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
        margin-bottom: 2rem;
        padding-bottom: 1rem;
        border-bottom: 2px solid var(--takwin-blue-light);
    }

    .library-page .course-info h3 {
        color: var(--takwin-primary);
        font-size: 1.25rem;
        font-weight: 600;
        margin-bottom: 0.5rem;
    }

    .library-page .course-info p {
        color: var(--takwin-gray);
        margin-bottom: 1rem;
        line-height: 1.5;
    }

    .library-page .course-stats {
        display: flex;
        gap: 1rem;
        flex-wrap: wrap;
    }

        .library-page .course-stats .stat {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.9rem;
            color: var(--takwin-gray);
        }

            .library-page .course-stats .stat i {
                color: var(--takwin-primary);
            }

    /* ============================================
   PDF GRID VIEW
   ============================================ */
    .library-page .pdfs-grid {
        display: grid;
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 1.5rem;
    }

    .library-page .pdf-card {
        background: white;
        border: 1px solid var(--takwin-border);
        border-radius: var(--border-radius-lg);
        overflow: hidden;
        box-shadow: var(--box-shadow-sm);
        transition: var(--transition-fast);
        cursor: pointer;
    }

        .library-page .pdf-card:hover {
            box-shadow: var(--box-shadow);
            transform: translateY(-2px);
        }

    .library-page .pdf-thumbnail {
        position: relative;
        height: 160px;
        background: linear-gradient(135deg, #f44336, #ff7961);
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .library-page .pdf-icon {
        font-size: 3rem;
        color: white;
    }

    .library-page .pdf-badge {
        position: absolute;
        top: 10px;
        right: 10px;
        background: rgba(255,255,255,0.9);
        color: #f44336;
        padding: 0.25rem 0.5rem;
        border-radius: 4px;
        font-size: 0.7rem;
        font-weight: 600;
    }

    .library-page .new-badge {
        position: absolute;
        top: 10px;
        left: 10px;
        background: var(--takwin-accent);
        color: white;
        padding: 0.25rem 0.5rem;
        border-radius: 4px;
        font-size: 0.7rem;
        font-weight: 600;
        animation: pulse 2s infinite;
    }

@keyframes pulse {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.05);
    }

    100% {
        transform: scale(1);
    }
}

.library-page .pdf-content {
    padding: 1.5rem;
}

.library-page .pdf-title {
    color: var(--takwin-dark);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.library-page .pdf-author {
    color: var(--takwin-primary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.library-page .pdf-stats {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--takwin-gray);
    margin-bottom: 1rem;
}

    .library-page .pdf-stats span {
        display: flex;
        align-items: center;
        gap: 0.25rem;
    }

    .library-page .pdf-stats i {
        color: var(--takwin-primary);
    }

.library-page .pdf-actions {
    display: flex;
    gap: 0.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--takwin-border);
}

    .library-page .pdf-actions .btn {
        flex: 1;
        padding: 0.5rem;
        font-size: 0.85rem;
        border-radius: var(--border-radius);
        font-weight: 500;
        transition: var(--transition-fast);
    }

/* ============================================
   PDF LIST VIEW
   ============================================ */
.library-page .pdfs-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.library-page .pdf-row {
    display: flex;
    align-items: center;
    padding: 1.5rem;
    border: 1px solid var(--takwin-border);
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
    cursor: pointer;
}

    .library-page .pdf-row:hover {
        background: var(--takwin-blue-light);
        box-shadow: var(--box-shadow-sm);
        border-color: var(--takwin-primary);
    }

.library-page .pdf-icon-wrapper {
    width: 50px;
    height: 50px;
    background: rgba(244, 67, 54, 0.1);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #f44336;
    font-size: 1.5rem;
    margin-left: 1rem;
    flex-shrink: 0;
}

.library-page .pdf-info {
    flex: 1;
}

    .library-page .pdf-info h4 {
        color: var(--takwin-dark);
        font-size: 1rem;
        font-weight: 600;
        margin-bottom: 0.25rem;
    }

    .library-page .pdf-info p {
        color: var(--takwin-primary);
        font-size: 0.9rem;
        margin-bottom: 0.25rem;
    }

    .library-page .pdf-info small {
        color: var(--takwin-gray);
        font-size: 0.8rem;
    }

.library-page .pdf-row .pdf-stats {
    display: flex;
    gap: 2rem;
    margin: 0 2rem;
}

.library-page .pdf-row .stat {
    text-align: center;
    min-width: 60px;
}

.library-page .stat-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--takwin-primary);
    line-height: 1;
}

.library-page .stat-label {
    font-size: 0.8rem;
    color: var(--takwin-gray);
    margin-top: 0.25rem;
}

.library-page .pdf-row .pdf-actions {
    flex-shrink: 0;
    gap: 0.25rem;
    padding: 0;
    border: none;
}

    .library-page .pdf-row .pdf-actions .btn {
        min-width: 36px;
        padding: 0.5rem;
        flex: none;
    }

/* ============================================
   PDF VIEWER
   ============================================ */
.library-page .pdf-viewer-section {
    height: calc(100vh - 200px);
    display: flex;
    flex-direction: column;
}

.library-page .pdf-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--takwin-border);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 1rem;
}

.library-page .pdf-info h2 {
    color: var(--takwin-dark);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.library-page .pdf-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.library-page .meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    color: var(--takwin-gray);
}

    .library-page .meta-item i {
        color: var(--takwin-primary);
    }

.library-page .pdf-header .pdf-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

    .library-page .pdf-header .pdf-actions .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
        border-radius: var(--border-radius);
        font-weight: 500;
        transition: var(--transition-fast);
        display: flex;
        align-items: center;
        gap: 0.5rem;
    }

.library-page .pdf-viewer-container {
    flex: 1;
    position: relative;
    background: #f5f5f5;
}

    .library-page .pdf-viewer-container.fullscreen {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 9999;
        background: white;
    }

.library-page .pdf-viewer {
    width: 100%;
    height: 100%;
}

    .library-page .pdf-viewer iframe {
        border: none;
        background: white;
    }

.library-page .pdf-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.library-page .loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--takwin-blue-light);
    border-top: 4px solid var(--takwin-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}

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

    100% {
        transform: rotate(360deg);
    }
}

.library-page .pdf-loading p {
    color: var(--takwin-gray);
    font-size: 0.9rem;
}

/* ============================================
   LOADING AND EMPTY STATES
   ============================================ */
.library-page .loading-state {
    text-align: center;
    padding: 4rem 2rem;
}

    .library-page .loading-state .loading-spinner {
        margin: 0 auto 1rem auto;
    }

    .library-page .loading-state h4 {
        color: var(--takwin-primary);
        margin: 1rem 0;
        font-weight: 600;
    }

.library-page .empty-state {
    text-align: center;
    padding: 4rem 2rem;
}

.library-page .empty-icon {
    margin-bottom: 2rem;
}

    .library-page .empty-icon i {
        font-size: 4rem;
        color: var(--takwin-gray);
        opacity: 0.5;
    }

.library-page .empty-state h3 {
    color: var(--takwin-dark);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    font-weight: 600;
}

.library-page .empty-state p {
    color: var(--takwin-gray);
    margin-bottom: 2rem;
    line-height: 1.6;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */
@media (max-width: 992px) {
    .library-page .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .library-page .header-stats {
        width: 100%;
        justify-content: space-around;
    }

    .library-page .library-sidebar {
        position: static;
        margin-bottom: 2rem;
    }

    .library-page .library-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .library-page .view-controls {
        width: 100%;
        justify-content: space-between;
    }

    .library-page .course-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .library-page .pdf-viewer-section {
        height: calc(100vh - 150px);
    }
}

@media (max-width: 768px) {
    .library-page .page-title {
        font-size: 2rem;
        flex-direction: column;
        gap: 0.5rem;
    }

    .library-page .header-stats {
        gap: 1rem;
    }

        .library-page .header-stats .stat-item {
            min-width: 80px;
            padding: 0.75rem;
        }

    .library-page .main-content {
        padding: 2rem 0;
    }

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

    .library-page .pdf-row {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .library-page .pdf-icon-wrapper {
        margin: 0;
    }

    .library-page .pdf-row .pdf-stats {
        justify-content: center;
        margin: 0;
        gap: 1rem;
    }

    .library-page .pdf-row .pdf-actions {
        justify-content: center;
    }

    .library-page .pdf-header {
        flex-direction: column;
        align-items: flex-start;
    }

        .library-page .pdf-header .pdf-actions {
            width: 100%;
            justify-content: center;
        }

    .library-page .view-controls {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }

    .library-page .view-mode-toggles {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .library-page .header-stats {
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
    }

        .library-page .header-stats .stat-item {
            width: 100%;
        }

    .library-page .filter-body,
    .library-page .recent-body {
        padding: 1rem;
    }

    .library-page .course-section {
        padding: 1rem;
    }

    .library-page .pdf-content {
        padding: 1rem;
    }

    .library-page .pdf-header {
        padding: 1rem;
    }

    .library-page .library-header {
        padding: 1rem;
    }

    .library-page .pdf-viewer-section {
        height: calc(100vh - 120px);
    }

    .library-page .sort-dropdown .form-select {
        width: 100%;
    }
}

/* ============================================
   FULLSCREEN PDF VIEWER FIXES
   ============================================ */

/* Fullscreen container */
.library-page .pdf-viewer-container.fullscreen {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: 0 !important;
    z-index: 9999 !important;
    background: #1a1a1a !important;
    width: 100vw !important;
    height: 100vh !important;
    margin: 0 !important;
    padding: 0 !important;
    border-radius: 0 !important;
    display: flex !important;
    flex-direction: column !important;
}

/* Fullscreen header */
.library-page .fullscreen-header {
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    backdrop-filter: blur(10px);
    z-index: 10000;
}

.library-page .fullscreen-title h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: white;
}

.library-page .fullscreen-title span {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.7);
}

.library-page .fullscreen-controls {
    display: flex;
    gap: 0.5rem;
}

    .library-page .fullscreen-controls .btn {
        padding: 0.5rem;
        font-size: 0.85rem;
        border-radius: 6px;
        transition: all 0.3s ease;
    }

        .library-page .fullscreen-controls .btn:hover {
            background: rgba(255,255,255,0.2) !important;
        }

/* Fullscreen PDF viewer */
.library-page .pdf-viewer-container.fullscreen .pdf-viewer {
    flex: 1;
    width: 100% !important;
    height: 100% !important;
    border: none !important;
}

    .library-page .pdf-viewer-container.fullscreen .pdf-viewer iframe {
        width: 100% !important;
        height: 100% !important;
        border: none !important;
        background: white !important;
    }

/* PDF Fallback styling */
.library-page .pdf-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--takwin-light);
}

.library-page .fallback-content {
    text-align: center;
    padding: 3rem;
    max-width: 500px;
}

    .library-page .fallback-content i {
        font-size: 4rem;
        color: #f44336;
        margin-bottom: 2rem;
    }

    .library-page .fallback-content h4 {
        color: var(--takwin-dark);
        font-size: 1.5rem;
        margin-bottom: 1rem;
        font-weight: 600;
    }

    .library-page .fallback-content p {
        color: var(--takwin-gray);
        margin-bottom: 2rem;
        line-height: 1.6;
    }

.library-page .fallback-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Enhanced loading spinner for fullscreen */
.library-page .pdf-viewer-container.fullscreen .pdf-loading {
    background: rgba(26, 26, 26, 0.9) !important;
    color: white;
}

    .library-page .pdf-viewer-container.fullscreen .pdf-loading .loading-spinner {
        border-color: rgba(255,255,255,0.1);
        border-top-color: var(--takwin-accent);
    }

    .library-page .pdf-viewer-container.fullscreen .pdf-loading p {
        color: rgba(255,255,255,0.8);
    }

/* Hide scrollbars when fullscreen */
.library-page .pdf-viewer-container.fullscreen {
    overflow: hidden !important;
}

body.fullscreen-mode {
    overflow: hidden !important;
}

/* Better responsive fullscreen */
@media (max-width: 768px) {
    .library-page .fullscreen-header {
        padding: 0.75rem 1rem;
    }

    .library-page .fullscreen-title h3 {
        font-size: 1rem;
    }

    .library-page .fullscreen-controls .btn {
        padding: 0.375rem;
        font-size: 0.8rem;
    }

    .library-page .fullscreen-controls {
        gap: 0.25rem;
    }
}

/* Fix for webkit browsers */
.library-page .pdf-viewer-container.fullscreen:-webkit-full-screen {
    width: 100% !important;
    height: 100% !important;
}

.library-page .pdf-viewer-container.fullscreen:-moz-full-screen {
    width: 100% !important;
    height: 100% !important;
}

.library-page .pdf-viewer-container.fullscreen:-ms-fullscreen {
    width: 100% !important;
    height: 100% !important;
}

/* Ensure proper z-index hierarchy */
.library-page .pdf-viewer-container.fullscreen {
    z-index: 2147483647 !important; /* Maximum z-index value */
}

/* Loading state fixes */
.library-page .pdf-loading {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.95);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    backdrop-filter: blur(5px);
}


.library-page .btn-primary {
  background: var(--takwin-primary);
  color: white;
  border-color: var(--takwin-secondary);
}

  .library-page .btn-primary:hover:not(:disabled) {
    background: var(--takwin-primary-light);
    border-color: var(--takwin-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(46, 124, 228, 0.3);
  }

.btn-primary .fa-undo-alt {
  font-size: 30px;
  color:white;
}