/**
 * AI Translation CSS Styles
 * 
 * Styles for the AI Translation feature including:
 * - Options dialog
 * - Split-view mode (Option F1)
 * - Loading states
 * - Page navigation
 * - Mobile responsive styles
 */

/* ========================================
   CSS Variables for AI Translation
   ======================================== */

:root {
    --translate-primary: #3B82F6;
    --translate-primary-light: #93C5FD;
    --translate-primary-dark: #1D4ED8;
    --translate-gradient: linear-gradient(135deg, #3B82F6 0%, #1D4ED8 100%);
    --translate-success: #10B981;
    --translate-warning: #F59E0B;
    --translate-error: #EF4444;
    
    --split-panel-width: 50%;
    --split-panel-min-width: 320px;
    --split-panel-bg: var(--bg-primary, #ffffff);
    --split-panel-shadow: none;
    --split-border-radius: 0;
}

[data-theme="dark"] {
    --translate-primary: #60A5FA;
    --translate-primary-light: #3B82F6;
    --translate-primary-dark: #2563EB;
    --split-panel-shadow: none;
    --split-panel-bg: var(--bg-primary, #1f2937);
}

/* ========================================
   Translate Button in Toolbar
   ======================================== */

#translateBtn {
    position: relative;
}

#translateBtn .icon {
    font-size: 16px;
}

#translateBtn:hover {
    background: var(--translate-primary);
    color: white;
}

/* AI badge pulse */
#translateBtn::after {
    content: 'AI';
    position: absolute;
    top: -4px;
    right: -4px;
    font-size: 8px;
    font-weight: 700;
    padding: 2px 4px;
    background: var(--translate-gradient);
    color: white;
    border-radius: 4px;
    animation: translatePulse 2s infinite;
}

@keyframes translatePulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.05); }
}

/* ========================================
   Translation Options Dialog
   ======================================== */

.translate-dialog {
    /* Inherits from .modal: position fixed, full viewport coverage */
    display: flex !important;
    align-items: center;
    justify-content: center;
}

.translate-dialog .modal-content {
    max-width: 500px;
    width: 90%;
    margin: auto;
}

.translate-dialog .modal-header {
    background: var(--translate-gradient);
    color: white;
    padding: 20px 24px;
    border-radius: var(--border-radius, 8px) var(--border-radius, 8px) 0 0;
}

.translate-dialog .modal-header h3 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.translate-dialog .modal-close {
    color: white;
    opacity: 0.8;
    transition: opacity 0.2s;
}

.translate-dialog .modal-close:hover {
    opacity: 1;
}

/* Language Selector */
.language-select-group {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.language-select-wrapper {
    flex: 1;
}

.language-select-wrapper label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.language-select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color, #e5e7eb);
    border-radius: 8px;
    font-size: 14px;
    background: var(--bg-primary, #fff);
    color: var(--text-primary);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.language-select:focus {
    outline: none;
    border-color: var(--translate-primary);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.language-select option {
    padding: 8px;
}

.swap-languages-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    margin-top: 20px;
}

.swap-languages-btn:hover {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
    transform: rotate(180deg);
}

/* Detected Language Badge */
.detected-language-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: rgba(59, 130, 246, 0.1);
    border-radius: 20px;
    font-size: 13px;
    color: var(--translate-primary);
    margin-top: 8px;
}

.detected-language-badge .flag {
    font-size: 16px;
}

/* ========================================
   Split View Container
   ======================================== */

/* True side-by-side layout */
.split-view-active #mainContent {
    display: flex;
    flex-direction: row;
    position: relative;
}

.split-view-active #canvasContainer,
.split-view-active .canvas-container {
    width: 60% !important;
    flex-shrink: 0;
    transition: width 0.15s ease;
    overflow: auto;
}

/* Draggable resize divider */
.split-resize-handle {
    width: 6px;
    background: linear-gradient(180deg, #e2e8f0 0%, #cbd5e1 100%);
    cursor: col-resize;
    position: relative;
    flex-shrink: 0;
    z-index: 101;
    transition: background 0.2s ease;
}

.split-resize-handle:hover,
.split-resize-handle.dragging {
    background: var(--translate-gradient);
}

.split-resize-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 40px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 2px;
}

.split-resize-handle:hover::before,
.split-resize-handle.dragging::before {
    background: rgba(255, 255, 255, 0.6);
}

/* Dark mode divider */
[data-theme="dark"] .split-resize-handle {
    background: linear-gradient(180deg, #374151 0%, #1f2937 100%);
}

[data-theme="dark"] .split-resize-handle:hover,
[data-theme="dark"] .split-resize-handle.dragging {
    background: var(--translate-gradient);
}

/* ========================================
   Translation Split Panel (F1)
   ======================================== */

.translation-split-panel {
    flex: 1;
    min-width: 280px;
    max-width: 70%;
    height: 100%;
    background: var(--split-panel-bg);
    box-shadow: var(--split-panel-shadow);
    display: flex;
    flex-direction: column;
    z-index: 100;
    animation: fadeIn 0.3s ease;
}

@keyframes slideInFromRight {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Panel Header */
.translation-panel-header {
    padding: 16px 20px;
    background: var(--translate-gradient);
    color: white;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.translation-lang-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.translation-lang-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
}

.translation-lang-badge .flag {
    font-size: 18px;
}

.translation-direction {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    opacity: 0.9;
}

.translation-direction .arrow {
    font-size: 16px;
}

.close-split-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.close-split-btn:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* Panel Toolbar */
.translation-panel-toolbar {
    padding: 12px 20px;
    background: var(--bg-secondary, #f9fafb);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.page-navigator {
    display: flex;
    align-items: center;
    gap: 8px;
}

.page-nav-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.page-nav-btn:hover:not(:disabled) {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
}

.page-nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.page-indicator {
    font-size: 13px;
    color: var(--text-secondary);
    min-width: 80px;
    text-align: center;
}

.sync-scroll-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
}

.sync-scroll-toggle input {
    accent-color: var(--translate-primary);
}

/* Panel Content */
.translation-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
    scroll-behavior: smooth;
}

/* Translated Page Card */
.translated-page {
    background: var(--bg-primary, white);
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    margin-bottom: 24px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    transition: box-shadow 0.2s;
}

.translated-page:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.translated-page.active {
    border-color: var(--translate-primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

.translated-page-header {
    padding: 10px 16px;
    background: var(--bg-secondary, #f9fafb);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.page-number {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.page-actions {
    display: flex;
    gap: 4px;
}

.page-action-btn {
    width: 28px;
    height: 28px;
    border-radius: 4px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.page-action-btn:hover {
    background: var(--bg-primary);
    color: var(--translate-primary);
}

.translated-page-content {
    padding: 24px;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-primary);
}

.translated-page-content p {
    margin-bottom: 1em;
}

.translated-page-content p:last-child {
    margin-bottom: 0;
}

/* RTL Support */
.translated-page-content.rtl {
    direction: rtl;
    text-align: right;
}

/* Panel Footer */
.translation-panel-footer {
    padding: 16px 20px;
    background: var(--bg-secondary, #f9fafb);
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
}

.translation-stats {
    display: flex;
    gap: 16px;
    font-size: 12px;
    color: var(--text-secondary);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.stat-item .icon {
    font-size: 14px;
}

.stat-value {
    font-weight: 600;
    color: var(--text-primary);
}

.stat-value.success {
    color: var(--translate-success);
}

.export-buttons {
    display: flex;
    gap: 8px;
}

.export-btn {
    padding: 8px 16px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.2s;
}

.export-btn:hover {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
}

.export-btn.primary {
    background: var(--translate-primary);
    border-color: var(--translate-primary);
    color: white;
}

.export-btn.primary:hover {
    background: var(--translate-primary-dark);
}

/* ========================================
   Loading States
   ======================================== */

.translation-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    flex: 1;
    padding: 40px;
    text-align: center;
    background: var(--bg-primary, #ffffff);
}

.translation-loading-spinner {
    width: 56px;
    height: 56px;
    border: 3px solid var(--border-color, #e5e7eb);
    border-top-color: var(--translate-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 24px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.translation-loading-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.translation-loading-subtext {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 280px;
}

.translation-progress {
    width: 100%;
    max-width: 280px;
    margin-top: 32px;
}

.progress-bar-container {
    height: 6px;
    background: var(--bg-secondary, #f3f4f6);
    border-radius: 3px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--translate-gradient);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 13px;
    color: var(--text-secondary);
    margin-top: 12px;
}

/* ========================================
   Cache Hit Indicator
   ======================================== */

.cache-hit-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    background: rgba(16, 185, 129, 0.1);
    color: var(--translate-success);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 600;
}

.cache-hit-badge .icon {
    font-size: 12px;
}

/* ========================================
   Domain Badge
   ======================================== */

.domain-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
}

.domain-badge .icon {
    font-size: 14px;
}

/* ========================================
   Error State
   ======================================== */

.translation-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 40px;
    text-align: center;
}

.translation-error-icon {
    font-size: 48px;
    color: var(--translate-error);
    margin-bottom: 16px;
}

.translation-error-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.translation-error-message {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 300px;
}

.retry-btn {
    margin-top: 20px;
    padding: 10px 24px;
    border-radius: 8px;
    border: none;
    background: var(--translate-primary);
    color: white;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.retry-btn:hover {
    background: var(--translate-primary-dark);
}

/* ========================================
   Mobile Responsive - Tabbed View
   ======================================== */

/* Mobile tab bar - hidden on desktop */
.mobile-translation-tabs {
    display: none;
}

/* Tablet (768-1024px) - narrower split, no drag */
@media (max-width: 1024px) and (min-width: 769px) {
    .split-view-active #canvasContainer,
    .split-view-active .canvas-container {
        width: 55% !important;
    }
    
    .split-resize-handle {
        display: none;
    }
    
    .translation-split-panel {
        flex: 1;
        min-width: 45%;
    }
}

/* Mobile (<768px) - Tabbed stacked view */
@media (max-width: 768px) {
    /* CSS custom properties for mobile layout */
    :root {
        --mobile-header-height: 60px;
        --mobile-tab-height: 56px; /* Increased for better touch targets */
        --mobile-safe-bottom: env(safe-area-inset-bottom, 0px);
        --mobile-content-top: calc(var(--mobile-header-height) + var(--mobile-tab-height));
    }
    
    /* Hide resize handle on mobile */
    .split-resize-handle {
        display: none;
    }
    
    /* Switch to column layout */
    .split-view-active #mainContent {
        flex-direction: column;
        height: 100%;
    }
    
    /* Show mobile tabs - improved touch targets */
    .mobile-translation-tabs {
        display: flex;
        position: fixed;
        top: var(--mobile-header-height);
        left: 0;
        right: 0;
        z-index: 200;
        background: var(--bg-primary, #ffffff);
        border-bottom: 1px solid var(--border-color, #e5e7eb);
        padding: 8px 12px;
        padding-top: calc(8px + env(safe-area-inset-top, 0px));
        gap: 8px;
    }
    
    .mobile-tab-btn {
        flex: 1;
        min-height: 48px; /* Google's minimum touch target */
        padding: 12px 16px;
        border: none;
        border-radius: 12px;
        font-size: 14px;
        font-weight: 600;
        cursor: pointer;
        transition: all 0.2s ease;
        background: var(--bg-secondary, #f3f4f6);
        color: var(--text-secondary, #6b7280);
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
    }
    
    .mobile-tab-btn i {
        font-size: 16px;
    }
    
    .mobile-tab-btn.active {
        background: var(--translate-gradient);
        color: white;
        box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
    }
    
    .mobile-tab-btn:not(.active):active {
        background: var(--bg-tertiary, #e5e7eb);
        transform: scale(0.98);
    }
    
    /* Full screen views on mobile - toggle visibility */
    .split-view-active #canvasContainer,
    .split-view-active .canvas-container {
        width: 100% !important;
        height: calc(100% - var(--mobile-tab-height)) !important;
        margin-top: var(--mobile-tab-height);
        display: block;
    }
    
    .split-view-active.show-translation #canvasContainer,
    .split-view-active.show-translation .canvas-container {
        display: none !important;
    }
    
    .translation-split-panel {
        position: fixed;
        top: var(--mobile-content-top);
        left: 0;
        right: 0;
        bottom: 0;
        width: 100%;
        max-width: 100%;
        min-width: 100%;
        border-radius: 0;
        display: none; /* Hidden by default on mobile */
        padding-bottom: var(--mobile-safe-bottom);
    }
    
    .split-view-active.show-translation .translation-split-panel {
        display: flex !important;
    }
    
    /* Floating swap button - safe area aware */
    .mobile-swap-fab {
        display: flex;
        position: fixed;
        bottom: calc(24px + var(--mobile-safe-bottom));
        right: 16px;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: var(--translate-gradient);
        color: white;
        border: none;
        box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
        cursor: pointer;
        z-index: 250;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        transition: transform 0.2s, box-shadow 0.2s;
        -webkit-tap-highlight-color: transparent;
    }
    
    .mobile-swap-fab:active {
        transform: scale(0.92);
        box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
    }
    
    /* Panel footer - safe area aware */
    .translation-panel-footer {
        padding-bottom: calc(16px + var(--mobile-safe-bottom));
    }
}

/* Hide swap FAB on desktop */
.mobile-swap-fab {
    display: none;
}

/* Small phones (<640px) - more compact layout */
@media (max-width: 640px) {
    /* Compact panel header */
    .translation-panel-header {
        padding: 10px 16px;
    }
    
    .translation-lang-info {
        gap: 6px;
    }
    
    .translation-lang-badge {
        padding: 4px 10px;
        font-size: 12px;
        border-radius: 16px;
    }
    
    .translation-lang-badge .flag {
        font-size: 14px;
    }
    
    .translation-direction {
        font-size: 11px;
    }
    
    .close-split-btn {
        width: 32px;
        height: 32px;
    }
    
    /* Compact toolbar */
    .translation-panel-toolbar {
        padding: 10px 16px;
    }
    
    .page-nav-btn {
        width: 36px;
        height: 36px;
    }
    
    .page-indicator {
        font-size: 12px;
        min-width: 60px;
    }
    
    .sync-scroll-toggle {
        font-size: 11px;
    }
    
    /* Compact content */
    .translation-panel-content {
        padding: 12px;
    }
    
    .translation-panel-content.single-page-mode {
        padding: 12px;
    }
    
    .translated-page-content,
    .page-paper {
        padding: 24px 20px;
        font-size: 13px;
    }
    
    .page-paper {
        height: auto;
        min-height: 400px;
        max-height: 60vh;
    }
    
    /* Compact footer with safe area */
    .translation-panel-footer {
        flex-direction: column;
        gap: 12px;
        padding: 12px 16px;
        padding-bottom: calc(12px + env(safe-area-inset-bottom, 0px));
    }
    
    .translation-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .stat-item {
        font-size: 11px;
    }
    
    .export-buttons {
        width: 100%;
        justify-content: center;
    }
    
    .export-btn {
        flex: 1;
        justify-content: center;
        padding: 10px 12px;
        font-size: 12px;
    }
    
    /* Bottom sheet style dialog for mobile */
    .translate-dialog .modal-content {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        width: 100%;
        max-width: 100%;
        max-height: 85vh;
        margin: 0;
        border-radius: 20px 20px 0 0;
        animation: slideUpSheet 0.3s ease;
        overflow-y: auto;
        padding-bottom: env(safe-area-inset-bottom, 0px);
    }
    
    @keyframes slideUpSheet {
        from {
            transform: translateY(100%);
            opacity: 0;
        }
        to {
            transform: translateY(0);
            opacity: 1;
        }
    }
    
    .translate-dialog .modal-header {
        border-radius: 20px 20px 0 0;
        position: sticky;
        top: 0;
        z-index: 10;
    }
    
    /* Bottom sheet drag indicator */
    .translate-dialog .modal-header::before {
        content: '';
        position: absolute;
        top: 8px;
        left: 50%;
        transform: translateX(-50%);
        width: 40px;
        height: 4px;
        background: rgba(255, 255, 255, 0.4);
        border-radius: 2px;
    }
    
    .translate-dialog .modal-header h3 {
        padding-top: 8px;
    }
    
    /* Stacked language selectors on small phones */
    .language-select-group {
        flex-direction: column;
        gap: 12px;
    }
    
    .swap-languages-btn {
        margin: 0 auto;
        transform: rotate(90deg);
    }
    
    .swap-languages-btn:hover,
    .swap-languages-btn:active {
        transform: rotate(270deg);
    }
    
    .language-select {
        padding: 14px 16px;
        font-size: 16px; /* Prevents iOS zoom on focus */
    }
    
    /* Larger touch targets for radio buttons */
    .translate-dialog input[type="radio"] {
        width: 20px;
        height: 20px;
        margin-right: 12px;
    }
    
    .translate-dialog label {
        padding: 12px 0;
        font-size: 15px;
    }
    
    /* Full-width action buttons */
    .translate-dialog .modal-footer {
        flex-direction: column;
        gap: 10px;
        padding: 16px 20px;
        padding-bottom: calc(16px + env(safe-area-inset-bottom, 0px));
    }
    
    .translate-dialog .modal-footer .btn {
        width: 100%;
        padding: 14px 20px;
        font-size: 16px;
        border-radius: 12px;
    }
    
    .translate-dialog .modal-footer .btn-primary {
        order: -1; /* Primary button first on mobile */
    }
    
    /* Page paper adjustments */
    .translated-page {
        margin-bottom: 12px;
    }
    
    .page-watermark {
        font-size: 10px;
        top: 12px;
        right: 16px;
    }
}

/* Extra small phones (<380px) */
@media (max-width: 380px) {
    .mobile-tab-btn {
        padding: 10px 12px;
        font-size: 13px;
    }
    
    .mobile-tab-btn i {
        font-size: 14px;
    }
    
    .translation-lang-badge {
        font-size: 11px;
        padding: 3px 8px;
    }
    
    .export-btn {
        padding: 10px 8px;
        font-size: 11px;
    }
    
    .export-btn span {
        display: none; /* Icons only on very small screens */
    }
}

/* ========================================
   Print Styles
   ======================================== */

@media print {
    .translation-split-panel {
        position: static;
        width: 100%;
        height: auto;
        box-shadow: none;
    }
    
    .translation-panel-header,
    .translation-panel-toolbar,
    .translation-panel-footer {
        display: none;
    }
    
    .translated-page {
        break-inside: avoid;
        page-break-inside: avoid;
    }
}

/* ========================================
   Document-Style View Enhancements
   ======================================== */

/* Page input in toolbar */
.page-input {
    width: 40px;
    text-align: center;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 4px;
    font-size: 13px;
    font-weight: 600;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.page-input:focus {
    outline: none;
    border-color: var(--translate-primary);
}

/* View mode buttons */
.view-options {
    display: flex;
    align-items: center;
    gap: 8px;
}

.view-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    color: var(--text-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.view-btn:hover {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
}

.view-btn.active {
    background: var(--translate-primary);
    border-color: var(--translate-primary);
    color: white;
}

/* Single page mode - shows one page at a time */
.translation-panel-content.single-page-mode {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 24px;
    background: #e5e7eb;
}

[data-theme="dark"] .translation-panel-content.single-page-mode {
    background: #1f2937;
}

.translation-panel-content.single-page-mode .translation-pages-container {
    width: 100%;
    max-width: 100%;
}

.translation-panel-content.single-page-mode .translated-page {
    display: none;
    margin: 0 auto;
}

.translation-panel-content.single-page-mode .translated-page.visible {
    display: block;
}

/* Scroll mode - shows all pages stacked */
.translation-panel-content.scroll-mode {
    padding: 24px;
    background: #e5e7eb;
}

[data-theme="dark"] .translation-panel-content.scroll-mode {
    background: #1f2937;
}

.translation-panel-content.scroll-mode .translated-page {
    display: block;
    margin-bottom: 24px;
}

.translation-panel-content.scroll-mode .translated-page:last-child {
    margin-bottom: 0;
}

/* Document paper styling */
.translated-page {
    max-width: 100%;
    margin: 0 auto 24px auto;
    background: transparent;
    border: none;
    box-shadow: none;
    border-radius: 0;
}

.translated-page:last-child {
    margin-bottom: 0;
}

.page-paper {
    background: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    border-radius: 4px;
    padding: 48px 56px;
    position: relative;
    /* A4 fixed height - approximately 11.7 inches at 72 DPI scaled down */
    /* Using aspect ratio 1:1.414 with a reasonable viewport height */
    height: 800px;
    max-height: 80vh;
    overflow-y: auto;
    overflow-x: hidden;
}

/* Custom scrollbar for page content */
.page-paper::-webkit-scrollbar {
    width: 6px;
}

.page-paper::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.05);
    border-radius: 3px;
}

.page-paper::-webkit-scrollbar-thumb {
    background: rgba(0, 0, 0, 0.15);
    border-radius: 3px;
}

.page-paper::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 0, 0, 0.25);
}

[data-theme="dark"] .page-paper {
    /* Keep document canvas white like real paper */
    background: white;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

[data-theme="dark"] .page-paper::-webkit-scrollbar-track {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .page-paper::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
}

[data-theme="dark"] .page-paper::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* Page watermark */
.page-watermark {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 11px;
    font-weight: 600;
    color: var(--text-tertiary);
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* RTL support for page paper */
.page-paper.rtl {
    direction: rtl;
    text-align: right;
}

.page-paper.rtl .page-watermark {
    right: auto;
    left: 20px;
}

/* Document text content styling */
.page-text-content {
    font-family: 'Georgia', 'Times New Roman', serif;
    font-size: var(--doc-base-font-size, 14px);
    line-height: 1.6;
    color: var(--text-primary, #1f2937);
}

[data-theme="dark"] .page-text-content {
    /* Keep text dark on white paper - like a real document */
    color: #1f2937;
}

/* Rich text formatting from PDF */
.page-text-content b,
.page-text-content strong {
    font-weight: 700;
}

.page-text-content i,
.page-text-content em {
    font-style: italic;
}

.page-text-content p {
    margin: 0 0 0.8em 0;
}

.page-text-content p:last-child {
    margin-bottom: 0;
}

.doc-heading {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    font-size: calc(var(--doc-base-font-size, 14px) * 1.2);
    font-weight: 700;
    margin: 0 0 10px 0;
    color: #1f2937;
    line-height: 1.3;
}

.doc-paragraph {
    margin: 0 0 0.8em 0;
    text-align: left;
    color: #1f2937;
}

.doc-paragraph:last-child {
    margin-bottom: 0;
}

.doc-list-item {
    margin: 0 0 8px 0;
    padding-left: 24px;
    text-indent: -12px;
    color: #1f2937;
}

.empty-page {
    text-align: center;
    color: var(--text-tertiary);
    font-style: italic;
    padding: 40px 0;
}

/* Page navigation sync highlight */
.translated-page.active .page-paper {
    box-shadow: 0 0 0 3px var(--translate-primary), 0 4px 20px rgba(0, 0, 0, 0.15);
}

/* Smooth transitions */
.translated-page {
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.translation-panel-content.single-page-mode .translated-page.visible {
    animation: fadeInPage 0.3s ease;
}

@keyframes fadeInPage {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Page loading state */
.page-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-tertiary);
    gap: 16px;
}

.page-loading .loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--translate-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Page error state */
.page-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--translate-error);
    gap: 12px;
    text-align: center;
}

.page-error i {
    font-size: 32px;
}

.page-error .retry-btn {
    margin-top: 8px;
    padding: 8px 16px;
    background: var(--translate-primary);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
}

.page-error .retry-btn:hover {
    background: var(--translate-primary-dark);
}

/* On-demand indicator */
.on-demand-indicator {
    background: rgba(59, 130, 246, 0.1);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 11px;
    color: var(--translate-primary);
}

/* Responsive adjustments for document view */
@media (max-width: 768px) {
    .page-paper {
        padding: 32px 24px;
        height: 600px;
        max-height: 70vh;
    }
    
    .page-text-content {
        font-size: 13px;
    }
    
    .doc-heading {
        font-size: 16px;
    }
    
    .view-options {
        display: none;
    }
    
    .translated-page {
        margin-bottom: 16px;
    }
}

/* ========================================
   Dark Theme Support - Comprehensive
   ======================================== */

[data-theme="dark"] .translate-dialog .modal-content {
    background: var(--bg-primary, #1f2937);
    border: 1px solid var(--border-color, #374151);
}

[data-theme="dark"] .language-select {
    background: var(--bg-secondary, #374151);
    border-color: var(--border-color, #4b5563);
    color: var(--text-primary, #f3f4f6);
}

[data-theme="dark"] .language-select:focus {
    border-color: var(--translate-primary);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.2);
}

[data-theme="dark"] .swap-languages-btn {
    background: var(--bg-secondary, #374151);
    border-color: var(--border-color, #4b5563);
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .swap-languages-btn:hover {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
}

[data-theme="dark"] .detected-language-badge {
    background: rgba(96, 165, 250, 0.15);
    color: var(--translate-primary);
}

/* Split Panel Dark Theme */
[data-theme="dark"] .translation-split-panel {
    background: var(--bg-primary, #1f2937);
    border-left: 1px solid var(--border-color, #374151);
}

[data-theme="dark"] .translation-panel-toolbar {
    background: var(--bg-secondary, #111827);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .page-nav-btn {
    background: var(--bg-secondary, #374151);
    border-color: var(--border-color, #4b5563);
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .page-nav-btn:hover:not(:disabled) {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
    background: rgba(96, 165, 250, 0.1);
}

[data-theme="dark"] .page-input {
    background: var(--bg-secondary, #374151);
    border-color: var(--border-color, #4b5563);
    color: var(--text-primary, #f3f4f6);
}

[data-theme="dark"] .page-input:focus {
    border-color: var(--translate-primary);
}

[data-theme="dark"] .sync-scroll-toggle {
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .view-btn {
    background: var(--bg-secondary, #374151);
    border-color: var(--border-color, #4b5563);
    color: var(--text-tertiary, #6b7280);
}

[data-theme="dark"] .view-btn:hover {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
}

[data-theme="dark"] .view-btn.active {
    background: var(--translate-primary);
    border-color: var(--translate-primary);
    color: white;
}

/* Panel Content Dark Theme */
[data-theme="dark"] .translation-panel-content {
    background: var(--bg-tertiary, #111827);
}

[data-theme="dark"] .translated-page-header {
    background: var(--bg-secondary, #1f2937);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .page-number {
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .page-action-btn {
    color: var(--text-tertiary, #6b7280);
}

[data-theme="dark"] .page-action-btn:hover {
    background: var(--bg-tertiary, #374151);
    color: var(--translate-primary);
}

[data-theme="dark"] .translated-page-content {
    /* Keep text dark on white paper */
    color: #1f2937;
}

/* Panel Footer Dark Theme */
[data-theme="dark"] .translation-panel-footer {
    background: var(--bg-secondary, #111827);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .stat-item {
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .stat-value {
    color: var(--text-primary, #f3f4f6);
}

[data-theme="dark"] .export-btn {
    background: var(--bg-secondary, #374151);
    border-color: var(--border-color, #4b5563);
    color: var(--text-primary, #f3f4f6);
}

[data-theme="dark"] .export-btn:hover {
    border-color: var(--translate-primary);
    color: var(--translate-primary);
}

[data-theme="dark"] .export-btn.primary {
    background: var(--translate-primary);
    border-color: var(--translate-primary);
    color: white;
}

/* Loading States Dark Theme */
[data-theme="dark"] .translation-loading {
    background: var(--bg-primary, #1f2937);
}

[data-theme="dark"] .translation-loading-spinner {
    border-color: var(--border-color, #374151);
    border-top-color: var(--translate-primary);
}

[data-theme="dark"] .translation-loading-text {
    color: var(--text-primary, #f3f4f6);
}

[data-theme="dark"] .translation-loading-subtext {
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .progress-bar-container {
    background: var(--bg-secondary, #374151);
}

[data-theme="dark"] .progress-text {
    color: var(--text-secondary, #9ca3af);
}

/* Error State Dark Theme */
[data-theme="dark"] .translation-error {
    background: var(--bg-primary, #1f2937);
}

[data-theme="dark"] .translation-error-title {
    color: var(--text-primary, #f3f4f6);
}

[data-theme="dark"] .translation-error-message {
    color: var(--text-secondary, #9ca3af);
}

/* Domain Badge Dark Theme */
[data-theme="dark"] .domain-badge {
    background: var(--bg-secondary, #374151);
    color: var(--text-secondary, #9ca3af);
}

/* Cache Hit Badge Dark Theme */
[data-theme="dark"] .cache-hit-badge {
    background: rgba(16, 185, 129, 0.15);
}

/* Page Loading/Error Dark Theme */
[data-theme="dark"] .page-loading {
    color: var(--text-tertiary, #6b7280);
}

[data-theme="dark"] .page-loading .loading-spinner {
    border-color: var(--border-color, #374151);
    border-top-color: var(--translate-primary);
}

/* On-demand Indicator Dark Theme */
[data-theme="dark"] .on-demand-indicator {
    background: rgba(96, 165, 250, 0.15);
    color: var(--translate-primary);
}

/* Mobile Tabs Dark Theme */
[data-theme="dark"] .mobile-translation-tabs {
    background: var(--bg-primary, #1f2937);
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .mobile-tab-btn {
    background: var(--bg-secondary, #374151);
    color: var(--text-secondary, #9ca3af);
}

[data-theme="dark"] .mobile-tab-btn.active {
    background: var(--translate-gradient);
    color: white;
}

[data-theme="dark"] .mobile-tab-btn:not(.active):active {
    background: var(--bg-tertiary, #4b5563);
}

/* Mobile FAB Dark Theme */
[data-theme="dark"] .mobile-swap-fab {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5);
}

/* Bottom Sheet Dialog Dark Theme (Mobile) */
@media (max-width: 640px) {
    [data-theme="dark"] .translate-dialog .modal-content {
        background: var(--bg-primary, #1f2937);
        border-top: 1px solid var(--border-color, #374151);
    }
    
    [data-theme="dark"] .translate-dialog .modal-header::before {
        background: rgba(255, 255, 255, 0.2);
    }
}

/* Translated Page Card Dark Theme */
[data-theme="dark"] .translated-page {
    border-color: var(--border-color, #374151);
}

[data-theme="dark"] .translated-page:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .translated-page.active {
    border-color: var(--translate-primary);
    box-shadow: 0 0 0 2px rgba(96, 165, 250, 0.3);
}

[data-theme="dark"] .translated-page.active .page-paper {
    box-shadow: 0 0 0 3px var(--translate-primary), 0 4px 20px rgba(0, 0, 0, 0.4);
}

/* Page Watermark Dark Theme - keep readable on white paper */
[data-theme="dark"] .page-watermark {
    color: #9ca3af;
}

/* Empty Page Dark Theme - keep readable on white paper */
[data-theme="dark"] .empty-page {
    color: #6b7280;
}