/* Variables */
:root {
    --cactus-gray-100: #f8f9fa;
    --cactus-gray-200: #e9ecef;
    --cactus-gray-300: #dee2e6;
    --cactus-gray-600: #6c757d;
    --cactus-gray-800: #343a40;
    --cactus-shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --cactus-shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --cactus-shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --cactus-radius: 8px;
    --cactus-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Main Container */
.cactus-pdf-viewer {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

/* PDF Header */
.pdf-header {
    margin-bottom: 30px;
}

.pdf-count {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 600;
    color: var(--cactus-gray-800);
    margin: 0;
}

.pdf-count i {
    color: var(--e-global-color-primary);
    font-size: 24px;
}

/* PDF Grid */
.pdf-grid {
    display: grid;
    gap: 30px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.pdf-grid.cols-2 { grid-template-columns: repeat(auto-fill, minmax(350px, 1fr)); }
.pdf-grid.cols-3 { grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.pdf-grid.cols-4 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }

/* PDF Card */
.pdf-card {
    background: #fff;
    border: 1px solid var(--cactus-gray-300);
    border-radius: var(--cactus-radius);
    overflow: hidden;
    transition: var(--cactus-transition);
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.pdf-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--cactus-shadow-lg);
    border-color: var(--e-global-color-primary);
}

/* PDF Thumbnail */
.pdf-thumbnail {
    position: relative;
    width: 100%;
    height: 350px;
    background: var(--cactus-gray-100);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.pdf-thumbnail canvas {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

/* Loading Spinner */
.loading-spinner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    color: var(--cactus-gray-600);
}

.loading-spinner i {
    color: var(--e-global-color-primary);
}

.loading-spinner span {
    font-size: 14px;
}

/* PDF Body */
.pdf-body {
    padding: 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.pdf-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--cactus-gray-800);
    margin: 0;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pdf-title i {
    color: var(--e-global-color-primary);
    flex-shrink: 0;
}

/* PDF Actions */
.pdf-actions {
    display: flex;
    gap: 10px;
    margin-top: auto;
}

.btn-view,
.btn-download {
    flex: 1 !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    gap: 8px !important;
    padding: 10px 16px !important;
    border: none !important;
    border-radius: 6px !important;
    font-size: 14px !important;
    font-weight: 500 !important;
    cursor: pointer !important;
    transition: var(--cactus-transition) !important;
    text-decoration: none !important;
    white-space: nowrap !important;
}

.btn-view {
    background: var(--e-global-color-primary) !important;
    color: #fff !important;
}

.btn-view:hover {
    background: var(--e-global-color-primary) !important;
    opacity: 0.9;
    transform: translateY(-2px);
    box-shadow: var(--cactus-shadow-md);
}

.btn-download {
    background: var(--cactus-gray-100) !important;
    color: var(--cactus-gray-800) !important;
    border: 1px solid var(--cactus-gray-300) !important;
}

.btn-download:hover {
    background: var(--cactus-gray-200) !important;
    border-color: var(--cactus-gray-600) !important;
    transform: translateY(-2px);
}

/* Modal */
.cactus-modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99999;
    animation: fadeIn 0.3s ease;
}

.cactus-modal.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(4px);
}

.modal-container {
    position: relative;
    width: 95%;
    max-width: 1200px;
    height: 95vh;
    margin: 2.5vh auto;
    background: #fff;
    border-radius: var(--cactus-radius);
    display: flex;
    flex-direction: column;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    animation: slideUp 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Modal Header */
.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 30px;
    border-bottom: 1px solid var(--cactus-gray-300);
    background: var(--cactus-gray-100);
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--cactus-gray-800);
    margin: 0;
    flex: 1;
    padding-right: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.modal-title i {
    color: var(--e-global-color-primary);
}

.modal-close {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    color: var(--cactus-gray-600) !important;
    cursor: pointer;
    border-radius: 6px;
    transition: var(--cactus-transition);
    font-size: 20px;
}

.modal-close:hover {
    background: var(--cactus-gray-200);
    color: var(--cactus-gray-800);
}

/* Modal Body */
.modal-body {
    flex: 1;
    overflow: auto;
    padding: 30px;
    background: var(--cactus-gray-100);
}

.pdf-canvas-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100%;
}

#pdf-canvas-container {
    background: #fff;
    box-shadow: var(--cactus-shadow-lg);
    border-radius: 4px;
    overflow: hidden;
}

#pdf-canvas-container canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

/* Modal Footer */
.modal-footer {
    padding: 20px 30px;
    border-top: 1px solid var(--cactus-gray-300);
    background: #fff;
}

.pdf-controls {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
}

.control-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-control {
    width: 40px !important;
    height: 40px !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    border: 1px solid var(--cactus-gray-300) !important;
    background: #fff !important;
    color: var(--cactus-gray-800) !important;
    border-radius: 6px !important;
    cursor: pointer !important;
    transition: var(--cactus-transition) !important;
    font-size: 16px !important;
    text-decoration: none !important;
}

.btn-control:hover:not(:disabled) {
    background: var(--e-global-color-primary) !important;
    border-color: var(--e-global-color-primary) !important;
    color: #fff !important;
}

.btn-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Page Info */
.page-info {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0 10px;
    font-size: 14px;
    color: var(--cactus-gray-800);
}

.page-input {
    width: 60px;
    padding: 8px 10px;
    border: 1px solid var(--cactus-gray-300);
    border-radius: 6px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
}

.page-input:focus {
    outline: none;
    border-color: var(--e-global-color-primary);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.page-separator {
    color: var(--cactus-gray-600);
}

.total-pages {
    font-weight: 500;
}

.zoom-level {
    min-width: 50px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
    color: var(--cactus-gray-800);
}

/* Fullscreen Mode */
.cactus-modal:fullscreen {
    background: #000;
}

.cactus-modal:fullscreen .modal-container {
    width: 100%;
    height: 100vh;
    max-width: none;
    margin: 0;
    border-radius: 0;
}

.cactus-modal:fullscreen .modal-body {
    background: #1a1a1a;
}

/* Responsive */
@media (max-width: 1024px) {
    .pdf-grid.cols-4 { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
    .pdf-grid.cols-3 { grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); }
}

@media (max-width: 768px) {
    .cactus-pdf-viewer {
        padding: 15px;
    }
    
    .pdf-grid {
        gap: 20px;
    }
    
    .pdf-grid.cols-2,
    .pdf-grid.cols-3,
    .pdf-grid.cols-4 {
        grid-template-columns: 1fr;
    }
    
    .pdf-thumbnail {
        height: 280px;
    }
    
    .modal-container {
        width: 100%;
        height: 100vh;
        margin: 0;
        border-radius: 0;
    }
    
    .modal-header,
    .modal-body,
    .modal-footer {
        padding: 15px;
    }
    
    .pdf-controls {
        gap: 10px;
    }
    
    .control-group {
        gap: 5px;
    }
    
    .btn-control {
        width: 36px !important;
        height: 36px !important;
        font-size: 14px !important;
    }
    
    .page-input {
        width: 50px;
        padding: 6px 8px;
    }
}

@media (max-width: 480px) {
    .pdf-actions {
        flex-direction: column;
    }
    
    .btn-view,
    .btn-download {
        width: 100% !important;
    }
    
    .pdf-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .control-group {
        justify-content: center;
    }
}

/* No PDFs Message */
.no-pdfs {
    text-align: center;
    padding: 40px 20px;
    color: var(--cactus-gray-600);
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.no-pdfs i {
    font-size: 20px;
}

/* Error State */
.pdf-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 15px;
    color: #dc3545;
    padding: 40px 20px;
}

.pdf-error i {
    font-size: 48px;
    opacity: 0.5;
}