/**
 * Syncfusion Bootstrap5 PDF Viewer Styles
 *
 * Mimics the design and styling of Syncfusion's Bootstrap5 PDF viewer demo
 * Features: Bootstrap5 styling, compact toolbar, sidebar navigation, professional layout
 *
 * @version 1.0.0
 * @author Augment Agent
 * @license MIT
 */

/* Bootstrap5 Variables and Base Styles */
:root {
    /* Bootstrap5 Color System */
    --bs-primary: #0d6efd;
    --bs-primary-rgb: 13, 110, 253;
    --bs-secondary: #6c757d;
    --bs-success: #198754;
    --bs-info: #0dcaf0;
    --bs-warning: #ffc107;
    --bs-danger: #dc3545;
    --bs-light: #f8f9fa;
    --bs-dark: #212529;

    /* Bootstrap5 Gray Scale */
    --bs-gray-100: #f8f9fa;
    --bs-gray-200: #e9ecef;
    --bs-gray-300: #dee2e6;
    --bs-gray-400: #ced4da;
    --bs-gray-500: #adb5bd;
    --bs-gray-600: #6c757d;
    --bs-gray-700: #495057;
    --bs-gray-800: #343a40;
    --bs-gray-900: #212529;

    /* Syncfusion PDF Viewer Specific */
    --spv-toolbar-height: 48px;
    --spv-sidebar-width: 250px;
    --spv-border-color: #dee2e6;
    --spv-toolbar-bg: #ffffff;
    --spv-sidebar-bg: #f8f9fa;
    --spv-content-bg: #ffffff;

    /* Typography */
    --bs-font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --bs-font-size-sm: 0.875rem;
    --bs-font-size-base: 1rem;

    /* Spacing */
    --bs-spacer: 1rem;
    --bs-border-radius: 0.375rem;
    --bs-border-radius-sm: 0.25rem;

    /* Shadows */
    --bs-box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --bs-box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --bs-box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
}

/* Responsive PDF Viewer Container */
.responsive-pdf-viewer {
    width: 100%;
    height: 70vh; /* 70% of viewport height */
    min-height: 400px; /* Minimum height for usability */
    max-height: 800px; /* Maximum height to prevent excessive size */
    position: relative;
    border-radius: var(--bs-border-radius);
    overflow: hidden;
    box-shadow: var(--bs-box-shadow);
}

/* Main Container */
.syncfusion-pdf-viewer {
    font-family: var(--bs-font-family);
    font-size: var(--bs-font-size-base);
    background: var(--spv-content-bg);
    border: 1px solid var(--spv-border-color);
    border-radius: var(--bs-border-radius);
    overflow: hidden;
    position: relative;
    height: 100%; /* Fill the responsive container */
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 100%;
}

/* Responsive Container Heights */
@media (max-width: 1200px) {
    .responsive-pdf-viewer {
        height: 65vh; /* Slightly smaller on large tablets/small desktops */
        max-height: 700px;
    }
}

@media (max-width: 768px) {
    .responsive-pdf-viewer {
        height: 60vh; /* Smaller height on tablets */
        min-height: 350px;
        max-height: 600px;
        border-radius: var(--bs-border-radius-sm); /* Smaller border radius */
    }

    .syncfusion-pdf-viewer {
        border-radius: var(--bs-border-radius-sm);
    }
}

@media (max-width: 480px) {
    .responsive-pdf-viewer {
        height: 50vh; /* Even smaller on phones */
        min-height: 300px;
        max-height: 500px;
        border-radius: 0; /* No border radius on mobile for full width */
        margin-left: -1rem;
        margin-right: -1rem;
        width: calc(100% + 2rem);
    }

    .syncfusion-pdf-viewer {
        border-left: none;
        border-right: none;
        border-radius: 0;
    }
}

@media (max-width: 360px) {
    .responsive-pdf-viewer {
        height: 45vh; /* Very small screens */
        min-height: 280px;
        max-height: 400px;
    }
}

/* Header Section */
.spv-header {
    background: var(--bs-light);
    padding: 1rem;
    border-bottom: 1px solid var(--spv-border-color);
}

/* Responsive Header */
@media (max-width: 768px) {
    .spv-header {
        padding: 0.75rem;
    }
}

@media (max-width: 480px) {
    .spv-header {
        padding: 0.5rem;
    }
}

.spv-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.spv-toggle-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.spv-toggle-label {
    font-size: var(--bs-font-size-sm);
    font-weight: 500;
    color: var(--bs-gray-700);
    margin: 0;
}

.spv-toggle-info {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    color: var(--bs-info);
    font-size: var(--bs-font-size-sm);
}

.spv-toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
}

.spv-toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.spv-toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bs-gray-400);
    transition: 0.3s;
    border-radius: 24px;
}

.spv-toggle-slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: 0.3s;
    border-radius: 50%;
}

input:checked + .spv-toggle-slider {
    background-color: var(--bs-primary);
}

input:checked + .spv-toggle-slider:before {
    transform: translateX(24px);
}

/* Main Content Area */
.spv-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Toolbar */
.spv-toolbar {
    background: var(--spv-toolbar-bg);
    border-bottom: 1px solid var(--spv-border-color);
    height: var(--spv-toolbar-height);
    display: flex;
    align-items: center;
    padding: 0 0.75rem;
    gap: 0.5rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.spv-toolbar::-webkit-scrollbar {
    display: none;
}

.spv-toolbar-group {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0 0.5rem;
    border-right: 1px solid var(--spv-border-color);
    flex-shrink: 0;
}

.spv-toolbar-group:last-child {
    border-right: none;
}

.spv-toolbar-btn {
    background: none;
    border: 1px solid transparent;
    border-radius: var(--bs-border-radius-sm);
    padding: 0.375rem;
    cursor: pointer;
    color: var(--bs-gray-600);
    font-size: 0.875rem;
    line-height: 1;
    transition: all 0.15s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
}

.spv-toolbar-btn:hover:not(:disabled) {
    background-color: var(--bs-gray-100);
    color: var(--bs-gray-800);
    border-color: var(--bs-gray-300);
}

.spv-toolbar-btn:active:not(:disabled) {
    background-color: var(--bs-gray-200);
    border-color: var(--bs-gray-400);
}

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

.spv-toolbar-btn.active {
    background-color: var(--bs-primary);
    color: white;
    border-color: var(--bs-primary);
}

/* Page Navigation */
.spv-page-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.spv-page-input {
    width: 60px;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--spv-border-color);
    border-radius: var(--bs-border-radius-sm);
    text-align: center;
    font-size: var(--bs-font-size-sm);
}

.spv-page-total {
    font-size: var(--bs-font-size-sm);
    color: var(--bs-gray-600);
    white-space: nowrap;
}

/* Zoom Controls */
.spv-zoom-dropdown {
    position: relative;
    display: inline-block;
}

.spv-zoom-btn {
    background: white;
    border: 1px solid var(--spv-border-color);
    border-radius: var(--bs-border-radius-sm);
    padding: 0.375rem 0.75rem;
    cursor: pointer;
    font-size: var(--bs-font-size-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 80px;
    justify-content: space-between;
}

.spv-zoom-btn:hover {
    background-color: var(--bs-gray-50);
    border-color: var(--bs-gray-400);
}

/* Content Area */
.spv-content {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Responsive Content Area */
@media (max-width: 768px) {
    .spv-content {
        flex-direction: column; /* Stack sidebar and document vertically on tablets */
    }
}

@media (max-width: 480px) {
    .spv-content {
        flex-direction: column;
    }
}

/* Sidebar */
.spv-sidebar {
    width: var(--spv-sidebar-width);
    background: var(--spv-sidebar-bg);
    border-right: 1px solid var(--spv-border-color);
    display: flex;
    flex-direction: column;
    transition: margin-left 0.3s ease;
    flex-shrink: 0;
}

.spv-sidebar.collapsed {
    margin-left: calc(-1 * var(--spv-sidebar-width));
}

.spv-sidebar-tabs {
    display: flex;
    background: white;
    border-bottom: 1px solid var(--spv-border-color);
}

.spv-sidebar-tab {
    flex: 1;
    background: none;
    border: none;
    padding: 0.75rem 0.5rem;
    cursor: pointer;
    font-size: var(--bs-font-size-sm);
    color: var(--bs-gray-600);
    border-bottom: 2px solid transparent;
    transition: all 0.15s ease;
}

.spv-sidebar-tab:hover {
    background-color: var(--bs-gray-50);
    color: var(--bs-gray-800);
}

.spv-sidebar-tab.active {
    color: var(--bs-primary);
    border-bottom-color: var(--bs-primary);
    background-color: white;
}

.spv-sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

/* PDF Document Area */
.spv-document {
    flex: 1;
    background: var(--bs-gray-100);
    overflow: auto;
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center; /* Center both horizontally and vertically */
    padding: 1rem;
    width: 100%;
    height: 100%;
}

.spv-document-container {
    background: white;
    box-shadow: var(--bs-box-shadow-lg);
    border-radius: var(--bs-border-radius);
    overflow: hidden;
    max-width: 100%;
    max-height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.spv-page {
    display: block;
    margin: 0 auto;
    box-shadow: var(--bs-box-shadow);
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
    border-radius: var(--bs-border-radius-sm);
}

/* Sidebar Toggle Button - Hidden on Desktop */
#spv-sidebar-toggle {
    display: none;
}

/* Responsive Design */
@media (max-width: 768px) {
    /* Show sidebar toggle button on tablets and mobile */
    #spv-sidebar-toggle {
        display: flex;
    }

    .spv-sidebar {
        width: 280px; /* Slightly wider on tablets */
        position: absolute;
        top: 0;
        left: 0;
        height: 100%;
        z-index: 1000;
        box-shadow: var(--bs-box-shadow-lg);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .spv-sidebar.show {
        transform: translateX(0);
    }

    .spv-toolbar {
        padding: 0 0.5rem;
        gap: 0.25rem;
        overflow-x: auto;
    }

    .spv-toolbar-group {
        padding: 0 0.25rem;
        flex-shrink: 0;
    }

    .spv-toolbar-btn {
        min-width: 36px;
        height: 36px;
        padding: 0.25rem;
    }

    .spv-header-content {
        flex-direction: column;
        align-items: stretch;
        gap: 0.75rem;
    }

    .spv-document {
        width: 100%;
    }

    .spv-page-input {
        width: 50px;
    }
}

/* Mobile Phones */
@media (max-width: 480px) {
    .spv-sidebar {
        width: 100vw; /* Full width on phones */
        max-width: 320px;
    }

    .spv-toolbar {
        padding: 0 0.25rem;
        gap: 0.125rem;
    }

    .spv-toolbar-group {
        padding: 0 0.125rem;
        gap: 0.125rem;
    }

    .spv-toolbar-btn {
        min-width: 32px;
        height: 32px;
        padding: 0.125rem;
    }

    .spv-header {
        padding: 0.5rem;
    }

    .spv-toggle-switch {
        width: 40px;
        height: 20px;
    }

    .spv-toggle-slider:before {
        height: 14px;
        width: 14px;
        left: 3px;
        bottom: 3px;
    }

    .spv-page-input {
        width: 40px;
        font-size: 0.75rem;
    }

    .spv-sidebar-content {
        padding: 0.5rem;
    }

    .spv-thumbnail-item {
        padding: 0.25rem;
        gap: 0.5rem;
    }

    .spv-thumbnail-canvas-container canvas {
        max-width: 40px;
        max-height: 60px;
    }
}

/* Very Small Screens */
@media (max-width: 360px) {
    .spv-toolbar-group {
        gap: 0;
    }

    .spv-toolbar-btn {
        min-width: 28px;
        height: 28px;
    }

    .spv-page-input {
        width: 35px;
    }
}

/* Loading States */
.spv-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--bs-gray-600);
    font-size: var(--bs-font-size-sm);
}

.spv-spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--bs-gray-300);
    border-top: 2px solid var(--bs-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Accessibility */
.spv-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Thumbnails */
.spv-thumbnails-container {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.5rem;
}

.spv-thumbnail-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem;
    border: 1px solid var(--spv-border-color);
    border-radius: var(--bs-border-radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    background: white;
}

.spv-thumbnail-item:hover {
    background-color: var(--bs-gray-50);
    border-color: var(--bs-primary);
    transform: translateY(-1px);
    box-shadow: var(--bs-box-shadow-sm);
}

.spv-thumbnail-item.active {
    background-color: rgba(13, 110, 253, 0.1);
    border-color: var(--bs-primary);
    box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

.spv-thumbnail-canvas-container {
    position: relative;
    flex-shrink: 0;
    border: 1px solid var(--bs-gray-300);
    border-radius: var(--bs-border-radius-sm);
    overflow: hidden;
    background: white;
}

.spv-thumbnail-canvas-container canvas {
    display: block;
    max-width: 60px;
    max-height: 80px;
}

.spv-thumbnail-number {
    position: absolute;
    top: 2px;
    right: 2px;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.125rem 0.25rem;
    border-radius: 2px;
    line-height: 1;
}

.spv-thumbnail-label {
    font-size: var(--bs-font-size-sm);
    font-weight: 500;
    color: var(--bs-gray-700);
}

.spv-thumbnail-item.active .spv-thumbnail-label {
    color: var(--bs-primary);
    font-weight: 600;
}

/* Bookmarks */
.spv-bookmarks-container {
    padding: 1rem;
}

.spv-bookmarks-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--spv-border-color);
}

.spv-bookmarks-header h4 {
    margin: 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--bs-gray-800);
}

.spv-bookmark-add {
    background: none;
    border: 1px solid var(--spv-border-color);
    border-radius: var(--bs-border-radius-sm);
    padding: 0.25rem;
    cursor: pointer;
    color: var(--bs-gray-600);
    transition: all 0.15s ease;
}

.spv-bookmark-add:hover {
    background-color: var(--bs-gray-100);
    border-color: var(--bs-primary);
    color: var(--bs-primary);
}

.spv-bookmarks-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.spv-bookmark-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: var(--bs-border-radius-sm);
    cursor: pointer;
    transition: background-color 0.15s ease;
    color: var(--bs-gray-700);
    font-size: var(--bs-font-size-sm);
}

.spv-bookmark-item:hover {
    background-color: var(--bs-gray-100);
    color: var(--bs-gray-900);
}

.spv-bookmark-item svg {
    color: var(--bs-primary);
    flex-shrink: 0;
}

.spv-empty-state {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--bs-gray-500);
}

.spv-empty-state p {
    margin: 0 0 0.5rem 0;
    font-size: var(--bs-font-size-sm);
}

.spv-empty-state small {
    font-size: 0.75rem;
    color: var(--bs-gray-400);
}

/* Organize Tools */
.spv-organize-container {
    padding: 1rem;
}

.spv-organize-header {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--spv-border-color);
}

.spv-organize-header h4 {
    margin: 0 0 0.25rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--bs-gray-800);
}

.spv-organize-header small {
    color: var(--bs-gray-600);
    font-size: 0.75rem;
}

.spv-organize-tools {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.spv-tool-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: white;
    border: 1px solid var(--spv-border-color);
    border-radius: var(--bs-border-radius-sm);
    cursor: pointer;
    font-size: var(--bs-font-size-sm);
    color: var(--bs-gray-700);
    transition: all 0.15s ease;
}

.spv-tool-btn:hover:not(:disabled) {
    background-color: var(--bs-gray-50);
    border-color: var(--bs-primary);
    color: var(--bs-primary);
}

.spv-tool-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background-color: var(--bs-gray-100);
}

.spv-tool-btn svg {
    flex-shrink: 0;
}

.spv-organize-notice {
    background-color: var(--bs-light);
    border: 1px solid var(--bs-gray-300);
    border-radius: var(--bs-border-radius-sm);
    padding: 1rem;
    text-align: center;
}

.spv-organize-notice p {
    margin: 0 0 0.5rem 0;
    font-size: var(--bs-font-size-sm);
    color: var(--bs-gray-700);
}

.spv-organize-notice small {
    font-size: 0.75rem;
    color: var(--bs-gray-600);
}

/* Error States */
.spv-error {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--bs-danger);
    font-size: var(--bs-font-size-sm);
}

/* Focus Styles */
.spv-toolbar-btn:focus,
.spv-sidebar-tab:focus,
.spv-toggle-slider:focus,
.spv-page-input:focus,
.spv-zoom-btn:focus,
.spv-thumbnail-item:focus,
.spv-bookmark-item:focus,
.spv-tool-btn:focus {
    outline: 2px solid var(--bs-primary);
    outline-offset: 2px;
}