/* Reader-specific styles for the Secure Ebook Reader */

/* Reader Container */
.reader-container {
    display: flex;
    height: 100%;
    position: relative;
}

/* Table of Contents Sidebar */
.toc-sidebar {
    width: var(--toc-width);
    background: var(--color-bg-secondary);
    border-right: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: relative;
    z-index: 10;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
}

.toc-sidebar.open {
    transform: translateX(0);
}

.toc-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg-primary);
}

.toc-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.toc-nav {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.toc-item {
    margin-bottom: var(--spacing-xs);
}

.toc-link {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text-primary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
    font-size: var(--font-size-sm);
    line-height: var(--line-height-normal);
}

.toc-link:hover {
    background: var(--color-bg-tertiary);
}

.toc-link.active {
    background: var(--color-primary);
    color: white;
}

.toc-level-1 { padding-left: var(--spacing-md); }
.toc-level-2 { padding-left: var(--spacing-xl); }
.toc-level-3 { padding-left: calc(var(--spacing-xl) + var(--spacing-md)); }
.toc-level-4 { padding-left: calc(var(--spacing-xl) * 2); }

/* Reader Main Area */
.reader-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

/* Reader Toolbar */
.reader-toolbar {
    height: 3.5rem;
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-md);
    flex-shrink: 0;
    gap: var(--spacing-md);
}

.toolbar-left,
.toolbar-center,
.toolbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.toolbar-left {
    flex: 0 0 auto;
}

.toolbar-center {
    flex: 1;
    justify-content: center;
}

.toolbar-right {
    flex: 0 0 auto;
}

.book-info {
    margin-left: var(--spacing-md);
}

.book-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin: 0;
    line-height: 1.2;
}

.book-author {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

/* Page Controls */
.page-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--color-bg-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
}

.page-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

#current-page-input {
    width: 3rem;
    padding: var(--spacing-xs);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-sm);
    text-align: center;
    font-size: var(--font-size-sm);
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--color-bg-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
}

#zoom-level {
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    min-width: 3rem;
    text-align: center;
}

/* View Mode Controls */
.view-mode-controls,
.annotation-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.tool-btn {
    position: relative;
}

.tool-btn.active {
    background: var(--color-primary);
    color: white;
}

.tool-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    background: var(--color-primary);
    border-radius: 50%;
}

/* Reader Content */
.reader-content {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: var(--color-bg-secondary);
}

/* Page Container */
.page-container {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: auto;
    padding: var(--spacing-lg);
}

.page-canvas {
    display: block;
    border: 1px solid var(--color-border-light);
    box-shadow: 0 4px 12px var(--color-shadow);
    border-radius: var(--radius-sm);
    background: white;
    cursor: crosshair;
    max-width: 100%;
    max-height: 100%;
}

/* Text Layer for PDF.js */
.text-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    opacity: 0.2;
    line-height: 1.0;
    pointer-events: auto;
}

.text-layer > span {
    color: transparent;
    position: absolute;
    white-space: pre;
    cursor: text;
    transform-origin: 0% 0%;
}

.text-layer .highlight {
    margin: -1px;
    padding: 1px;
    background-color: rgba(180, 0, 170, 0.2);
    border-radius: 4px;
}

.text-layer .highlight.begin {
    border-radius: 4px 0px 0px 4px;
}

.text-layer .highlight.end {
    border-radius: 0px 4px 4px 0px;
}

.text-layer .highlight.middle {
    border-radius: 0px;
}

.text-layer .highlight.selected {
    background-color: rgba(0, 100, 0, 0.2);
}

/* Annotation Layer */
.annotation-layer {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.annotation {
    position: absolute;
    pointer-events: auto;
    cursor: pointer;
}

.highlight-annotation {
    background-color: rgba(255, 255, 0, 0.3);
    border: 1px solid rgba(255, 255, 0, 0.6);
    border-radius: 2px;
}

.note-annotation {
    width: 20px;
    height: 20px;
    background: var(--color-warning);
    border-radius: 50%;
    border: 2px solid white;
    box-shadow: 0 2px 4px var(--color-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    font-weight: bold;
}

.bookmark-annotation {
    width: 0;
    height: 0;
    border-left: 10px solid var(--color-error);
    border-right: 10px solid var(--color-error);
    border-bottom: 15px solid transparent;
    margin-left: -10px;
    margin-top: -2px;
}

/* Annotation Tooltip */
.annotation-tooltip {
    position: absolute;
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border-medium);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    box-shadow: 0 4px 12px var(--color-shadow);
    max-width: 300px;
    z-index: var(--z-tooltip);
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
}

.annotation-tooltip::before {
    content: '';
    position: absolute;
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-bottom: 5px solid var(--color-border-medium);
}

/* Thumbnails Sidebar */
.thumbnails-sidebar {
    width: var(--thumbnails-width);
    background: var(--color-bg-secondary);
    border-left: 1px solid var(--color-border-light);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transform: translateX(100%);
    transition: transform var(--transition-normal);
}

.thumbnails-sidebar.open {
    transform: translateX(0);
}

.thumbnails-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--color-bg-primary);
}

.thumbnails-header h3 {
    margin: 0;
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.thumbnails-container {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.thumbnail-item {
    margin-bottom: var(--spacing-sm);
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.thumbnail-item:hover {
    border-color: var(--color-border-medium);
}

.thumbnail-item.active {
    border-color: var(--color-primary);
}

.thumbnail-image {
    width: 100%;
    height: auto;
    display: block;
    background: white;
}

.thumbnail-page-number {
    text-align: center;
    padding: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    background: var(--color-bg-primary);
}

/* Reading Guide */
.reading-guide {
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    pointer-events: none;
    opacity: 0.7;
    z-index: 20;
}

/* Selection Styles */
.user-select-none {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.page-container.selecting {
    cursor: crosshair;
}

.page-container.selecting .page-canvas {
    cursor: crosshair;
}

/* Page Transition Effects */
.page-transition-fade {
    transition: opacity var(--transition-normal);
}

.page-transition-fade.loading {
    opacity: 0.5;
}

.page-transition-slide {
    transition: transform var(--transition-normal);
}

.page-transition-slide.next {
    transform: translateX(100%);
}

.page-transition-slide.prev {
    transform: translateX(-100%);
}

/* Print Styles */
@media print {
    .reader-toolbar,
    .toc-sidebar,
    .thumbnails-sidebar {
        display: none !important;
    }
    
    .reader-content {
        padding: 0;
        background: white;
    }
    
    .page-canvas {
        border: none;
        box-shadow: none;
        max-width: none;
        max-height: none;
    }
}

/* Responsive Design for Reader */
@media (max-width: 1024px) {
    .toc-sidebar,
    .thumbnails-sidebar {
        position: fixed;
        top: calc(var(--header-height) + 3.5rem);
        bottom: 0;
        z-index: 99;
    }
    
    .toc-sidebar {
        left: -100%;
    }
    
    .toc-sidebar.open {
        left: 0;
    }
    
    .thumbnails-sidebar {
        right: -100%;
    }
    
    .thumbnails-sidebar.open {
        right: 0;
    }
    
    .reader-toolbar {
        gap: var(--spacing-sm);
        padding: 0 var(--spacing-sm);
    }
    
    .toolbar-center {
        order: -1;
        flex: 0 0 auto;
    }
    
    .book-info {
        display: none;
    }
}

@media (max-width: 768px) {
    .reader-toolbar {
        height: 3rem;
        flex-wrap: wrap;
    }
    
    .zoom-controls,
    .view-mode-controls {
        gap: 0;
    }
    
    .annotation-controls {
        order: 2;
        width: 100%;
        justify-content: center;
        padding-top: var(--spacing-xs);
        border-top: 1px solid var(--color-border-light);
        margin-top: var(--spacing-xs);
    }
    
    .page-container {
        padding: var(--spacing-md);
    }
}

@media (max-width: 640px) {
    .reader-toolbar {
        padding: 0 var(--spacing-sm);
    }
    
    .page-controls {
        gap: var(--spacing-xs);
    }
    
    #current-page-input {
        width: 2.5rem;
    }
    
    .zoom-controls {
        gap: var(--spacing-xs);
    }
    
    #zoom-level {
        min-width: 2.5rem;
        font-size: var(--font-size-xs);
    }
    
    .page-container {
        padding: var(--spacing-sm);
    }
}

/* Focus and Accessibility */
.reader-toolbar button:focus,
.toc-link:focus,
.thumbnail-item:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

.annotation:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 1px;
}