/* ============================================
   PDF Tools - Viewer Styles
   ============================================ */

.viewer-body {
    overflow: hidden;
    height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Reading Mode Filters */
.viewer-body[data-reading="night"] {
    --viewer-bg: #1a1a2e;
    --viewer-text: #e0e0e0;
    filter: invert(0.9) hue-rotate(180deg);
}

.viewer-body[data-reading="sepia"] {
    --viewer-bg: #f4ecd8;
    --viewer-text: #5c4b37;
}

.viewer-body[data-reading="dark"] {
    --viewer-bg: #121212;
    --viewer-text: #ffffff;
}

.viewer-body[data-reading="focus"] .viewer-sidebar,
.viewer-body[data-reading="focus"] .viewer-header {
    opacity: 0.3;
    transition: opacity 0.3s;
}

.viewer-body[data-reading="focus"] .viewer-sidebar:hover,
.viewer-body[data-reading="focus"] .viewer-header:hover {
    opacity: 1;
}

/* Viewer Header */
.viewer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-4);
    background: var(--surface);
    border-bottom: 1px solid var(--border-subtle);
    height: 52px;
    flex-shrink: 0;
    z-index: 100;
}

.viewer-header-left,
.viewer-header-center,
.viewer-header-right {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.logo-mini {
    text-decoration: none;
}

.viewer-filename {
    font-size: var(--text-sm);
    color: var(--text-secondary);
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-left: var(--space-3);
}

.viewer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.viewer-btn:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.viewer-btn.active {
    background: var(--primary-glow);
    color: var(--primary);
}

.viewer-divider {
    width: 1px;
    height: 24px;
    background: var(--border-subtle);
    margin: 0 var(--space-2);
}

.page-input-group {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-sm);
}

.page-input-group input {
    width: 50px;
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-align: center;
    font-size: var(--text-sm);
}

.zoom-select {
    padding: var(--space-1) var(--space-2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: var(--text-sm);
    cursor: pointer;
}

/* Dropdown */
.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--space-1);
    min-width: 180px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--space-2);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-fast);
    z-index: 1000;
}

.dropdown:hover .dropdown-menu,
.dropdown.open .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: block;
    width: 100%;
    padding: var(--space-2) var(--space-3);
    border: none;
    background: none;
    text-align: left;
    font-size: var(--text-sm);
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.dropdown-item.active {
    background: var(--primary-glow);
    color: var(--primary);
}

.dropdown-menu hr {
    border: none;
    border-top: 1px solid var(--border-subtle);
    margin: var(--space-2) 0;
}

/* Search Bar */
.search-bar {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--surface);
    border-bottom: 1px solid var(--border-subtle);
}

.search-bar input {
    flex: 1;
    padding: var(--space-2);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
}

#searchResults {
    font-size: var(--text-sm);
    color: var(--text-muted);
    min-width: 70px;
}

/* Viewer Container */
.viewer-container {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* Sidebar */
.viewer-sidebar {
    width: 240px;
    background: var(--surface);
    border-right: 1px solid var(--border-subtle);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    transition: width 0.3s, margin 0.3s;
}

.viewer-sidebar.collapsed {
    width: 0;
    margin-left: -1px;
    overflow: hidden;
}

.sidebar-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-subtle);
}

.sidebar-tab {
    flex: 1;
    padding: var(--space-3);
    border: none;
    background: none;
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.sidebar-tab:hover {
    color: var(--text-primary);
}

.sidebar-tab.active {
    color: var(--primary);
    border-bottom: 2px solid var(--primary);
}

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

.sidebar-panel {
    display: none;
    padding: var(--space-3);
}

.sidebar-panel.active {
    display: block;
}

/* Thumbnails */
.thumbnails-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.thumbnail-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.thumbnail-item:hover {
    background: var(--bg-secondary);
}

.thumbnail-item.active {
    background: var(--primary-glow);
}

.thumbnail-item canvas {
    width: 50px;
    height: auto;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
}

.thumbnail-item span {
    font-size: var(--text-sm);
    color: var(--text-secondary);
}

/* Bookmarks */
.bookmark-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-2) var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
    cursor: pointer;
}

.bookmark-item:hover {
    background: var(--bg-tertiary);
}

.bookmark-item .page {
    font-size: var(--text-xs);
    color: var(--text-muted);
}

.bookmark-item .delete-btn {
    opacity: 0;
    color: var(--error);
    cursor: pointer;
}

.bookmark-item:hover .delete-btn {
    opacity: 1;
}

/* Notes */
.note-item {
    padding: var(--space-3);
    background: #fff59d;
    border-radius: var(--radius-md);
    margin-bottom: var(--space-2);
    color: #333;
    font-size: var(--text-sm);
}

[data-theme="dark"] .note-item {
    background: #454516;
    color: #fff;
}

.note-item .note-header {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: #666;
    margin-bottom: var(--space-1);
}

.empty-message {
    text-align: center;
    color: var(--text-muted);
    padding: var(--space-4);
    font-size: var(--text-sm);
}

/* Reading Progress */
.reading-progress {
    height: 4px;
    background: var(--bg-tertiary);
}

.reading-progress .progress-bar {
    height: 100%;
    background: var(--primary);
    transition: width 0.3s;
}

.reading-stats {
    display: flex;
    justify-content: space-between;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    color: var(--text-muted);
}

/* Main Viewer */
.viewer-main {
    flex: 1;
    overflow: auto;
    background: var(--viewer-bg, var(--bg-secondary));
    position: relative;
}

.viewer-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: var(--space-8);
}

.recent-files {
    max-width: 400px;
    width: 100%;
}

.recent-files h4 {
    font-size: var(--text-sm);
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.recent-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.recent-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--surface);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.recent-item:hover {
    background: var(--bg-tertiary);
}

/* PDF Container */
.pdf-container {
    padding: var(--space-4);
    min-height: 100%;
}

.pdf-pages {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-4);
}

/* View Modes */
.pdf-pages.horizontal {
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
}

.pdf-pages.double,
.pdf-pages.sidebyside {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.pdf-pages.book {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.pdf-page {
    background: white;
    box-shadow: var(--shadow-lg);
    position: relative;
}

.pdf-page canvas {
    display: block;
}

/* Sepia mode for pages */
.viewer-body[data-reading="sepia"] .pdf-page {
    filter: sepia(0.3);
}

/* Night mode for pages */
.viewer-body[data-reading="night"] .pdf-page {
    filter: invert(1) hue-rotate(180deg);
}

/* Mini Map */
.minimap {
    position: fixed;
    right: 20px;
    top: 100px;
    width: 100px;
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.minimap canvas {
    width: 100%;
    height: auto;
}

.minimap-viewport {
    position: absolute;
    border: 2px solid var(--primary);
    background: rgba(79, 70, 229, 0.1);
    pointer-events: none;
}

/* Timer Overlay */
.timer-overlay {
    position: fixed;
    bottom: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    font-family: monospace;
    font-size: var(--text-lg);
}

/* Ruler Overlay */
.ruler-overlay {
    position: fixed;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    height: 30px;
    background: rgba(79, 70, 229, 0.2);
    border-top: 2px solid var(--primary);
    border-bottom: 2px solid var(--primary);
    pointer-events: none;
    z-index: 1000;
}

/* Magnifier */
.magnifier {
    position: fixed;
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid var(--primary);
    box-shadow: var(--shadow-xl);
    pointer-events: none;
    overflow: hidden;
    z-index: 1000;
}

.magnifier canvas {
    width: 100%;
    height: 100%;
}

/* Line Helper */
.line-helper {
    position: fixed;
    left: 0;
    right: 0;
    height: 30px;
    background: linear-gradient(transparent, rgba(255, 255, 0, 0.2), transparent);
    pointer-events: none;
    z-index: 1000;
}

/* Responsive */
@media (max-width: 768px) {
    .viewer-header-center {
        display: none;
    }

    .viewer-sidebar {
        position: fixed;
        left: 0;
        top: 52px;
        bottom: 0;
        z-index: 100;
        transform: translateX(-100%);
        transition: transform 0.3s;
    }

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

    .viewer-filename {
        max-width: 100px;
    }
}