/* Reset & Global Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', 'Mukta', sans-serif;
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* CSS variables for variables & themes */
:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-grad: linear-gradient(135deg, #6366f1 0%, #4f46e5 100%);
    
    --success: #10b981;
    --success-grad: linear-gradient(135deg, #10b981 0%, #059669 100%);
    
    --danger: #ef4444;
    --danger-grad: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    
    --warning: #f59e0b;
    --highlight: rgba(245, 158, 11, 0.25);
    
    /* Dark Mode Defaults */
    --bg-base: #0a0a0f;
    --bg-surface: rgba(20, 20, 28, 0.7);
    --bg-sidebar: rgba(14, 14, 20, 0.85);
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --border-color: rgba(255, 255, 255, 0.07);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
    --glass-blur: blur(20px);
    --item-hover: rgba(255, 255, 255, 0.04);
    --panel-header-bg: rgba(18, 18, 26, 0.8);
    --editor-bg: #111116;
}

body.light-mode {
    --bg-base: #f1f5f9;
    --bg-surface: rgba(255, 255, 255, 0.75);
    --bg-sidebar: rgba(248, 250, 252, 0.9);
    --text-main: #0f172a;
    --text-muted: #475569;
    --border-color: rgba(0, 0, 0, 0.06);
    --card-shadow: 0 8px 32px 0 rgba(15, 23, 42, 0.06);
    --item-hover: rgba(0, 0, 0, 0.03);
    --panel-header-bg: rgba(255, 255, 255, 0.9);
    --editor-bg: #ffffff;
}

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    overflow: hidden;
    height: 100vh;
    display: flex;
}

/* App Container */
.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
    position: relative;
}

/* Sidebar Styling */
.sidebar {
    width: 320px;
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    z-index: 10;
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
}

.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--border-color);
}

.brand-icon {
    font-size: 28px;
    background: var(--primary-grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 8px rgba(99, 102, 241, 0.3));
}

.brand-text h1 {
    font-family: 'Yatra One', 'Cinzel', serif;
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.brand-text span {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--text-muted);
    font-weight: 600;
}

/* Tabs Container */
.tabs-container {
    display: flex;
    padding: 12px 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    padding: 10px 4px;
    border-radius: 8px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 11px;
    font-weight: 500;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: all 0.2s ease;
}

.tab-btn i {
    font-size: 14px;
}

.tab-btn:hover {
    color: var(--text-main);
    background-color: var(--item-hover);
}

.tab-btn.active {
    background: var(--primary-grad);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

/* Tab Contents */
.tab-content {
    display: none;
    flex: 1;
    flex-direction: column;
    overflow: hidden;
}

.tab-content.active {
    display: flex;
}

/* Search Box inside Sidebar */
.search-box {
    padding: 16px;
    display: flex;
    gap: 8px;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.05);
}

.search-box i {
    color: var(--text-muted);
    font-size: 14px;
}

.search-box input {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-main);
    font-size: 14px;
}

.search-submit-btn {
    background: var(--primary-grad);
    border: none;
    outline: none;
    color: white;
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
}

/* Page List Scroll Area */
.page-list-container {
    flex: 1;
    overflow-y: auto;
    padding: 8px 12px;
}

.page-list {
    list-style: none;
}

.page-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    border-radius: 8px;
    margin-bottom: 6px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.page-item:hover {
    background-color: var(--item-hover);
    transform: translateX(3px);
}

.page-item.active {
    background-color: var(--primary-grad);
    border-color: rgba(255, 255, 255, 0.1);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.page-item.active .page-title {
    color: white;
    font-weight: 600;
}

.page-title {
    font-size: 14px;
    color: var(--text-main);
    font-weight: 500;
}

.page-badges {
    display: flex;
    gap: 6px;
}

.badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    font-size: 11px;
    background-color: rgba(255, 255, 255, 0.1);
}

.page-item.active .badge {
    background-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.badge-transcript {
    color: var(--success);
}
.page-item.active .badge-transcript {
    color: #a7f3d0;
}

.badge-image {
    color: var(--primary);
}
.page-item.active .badge-image {
    color: #c7d2fe;
}

/* Global Search Tab Content */
.search-results-container {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.results-info {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.search-results-list {
    list-style: none;
}

.search-result-item {
    padding: 14px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background-color: rgba(255, 255, 255, 0.01);
    margin-bottom: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.search-result-item:hover {
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--card-shadow);
}

.search-result-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 6px;
}

.search-snippet {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.5;
    margin-top: 4px;
}

.highlight {
    background-color: var(--highlight);
    color: var(--warning);
    font-weight: 600;
    padding: 1px 3px;
    border-radius: 2px;
}

/* Settings Tab Panel */
.settings-panel {
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    overflow-y: auto;
    flex: 1;
}

.settings-panel h3 {
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--text-muted);
}

.settings-desc {
    font-size: 12px;
    color: var(--text-muted);
    line-height: 1.5;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.setting-item label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
}

.setting-item input, .batch-format-selector select, #upload-type, #upload-file {
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    padding: 10px 12px;
    border-radius: 6px;
    color: var(--text-main);
    font-size: 13px;
    width: 100%;
    outline: none;
    transition: border-color 0.2s ease;
}

.setting-item input:focus, .batch-format-selector select:focus, #upload-type:focus, #upload-file:focus {
    border-color: var(--primary);
}

body.light-mode .setting-item input, 
body.light-mode .batch-format-selector select,
body.light-mode #upload-type,
body.light-mode #upload-file {
    background-color: rgba(255, 255, 255, 0.8);
    color: var(--text-main);
    border-color: rgba(0, 0, 0, 0.15);
}

.divider {
    border: none;
    border-top: 1px solid var(--border-color);
}

.batch-format-selector {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
}

.batch-controls {
    display: flex;
    gap: 12px;
    margin-top: 8px;
}

.btn {
    padding: 10px 16px;
    border-radius: 6px;
    border: none;
    outline: none;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
}

.btn-primary {
    background: var(--primary-grad);
    color: white;
}
.btn-primary:hover {
    box-shadow: 0 4px 14px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background-color: var(--border-color);
    color: var(--text-main);
}
.btn-secondary:hover {
    background-color: var(--item-hover);
}

.btn-danger {
    background: var(--danger-grad);
    color: white;
}

.btn-success {
    background: var(--success-grad);
    color: white;
}

.btn-sm {
    padding: 8px 12px;
    font-size: 12px;
}

/* Progress bar */
.batch-progress-container {
    margin-top: 12px;
}

.progress-bar-wrapper {
    height: 8px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 6px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: var(--success-grad);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.progress-labels {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-muted);
}

/* Sidebar Footer */
.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border-color);
}

.theme-toggle-btn {
    background-color: var(--item-hover);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 10px;
    width: 100%;
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
}

.theme-toggle-btn:hover {
    background-color: rgba(255, 255, 255, 0.08);
}

/* Main Viewer Workspace (Two panes side-by-side) */
.viewer-workspace {
    flex: 1;
    display: flex;
    height: 100vh;
    background-color: var(--bg-base);
}

.viewer-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.image-pane {
    border-right: 1px solid var(--border-color);
    background-color: rgba(0, 0, 0, 0.15);
}

.pane-header {
    height: 64px;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--panel-header-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    z-index: 5;
}

.pane-header h2 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

/* Controls Toolbar */
.image-controls, .editor-toolbar, .text-controls {
    display: flex;
    align-items: center;
    gap: 8px;
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 34px;
    height: 34px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.icon-btn:hover {
    background-color: var(--item-hover);
    border-color: var(--primary);
    color: var(--primary);
}

/* Image Viewer Container */
.image-viewer-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: grab;
}

.zoomable-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain;
    transform-origin: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    user-select: none;
    -webkit-user-drag: none;
    transition: transform 0.1s ease-out, opacity 0.3s ease;
}

.image-loader {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(10, 10, 15, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
    z-index: 4;
}

/* Devanagari text reader pane */
.text-pane {
    background-color: var(--bg-surface);
}

.transcript-editor-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
    position: relative;
}

.editor-toolbar {
    padding: 8px 16px;
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border-color);
    border-bottom: none;
    border-radius: 8px 8px 0 0;
    justify-content: flex-start;
    gap: 12px;
}

.toolbar-label {
    font-size: 11px;
    text-transform: uppercase;
    color: var(--text-muted);
    font-weight: 600;
}

.sym-btn {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.15s ease;
}

.sym-btn:hover {
    background-color: var(--primary);
    color: white;
}

.font-size-controls {
    margin-left: auto;
    display: flex;
    gap: 6px;
}

.icon-btn-sm {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    width: 26px;
    height: 26px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn-sm:hover {
    color: var(--text-main);
    background-color: var(--item-hover);
}

.transcript-editor-container textarea {
    flex: 1;
    background-color: var(--editor-bg);
    border: 1px solid var(--border-color);
    border-radius: 0 0 8px 8px;
    padding: 24px;
    color: var(--text-main);
    font-size: 18px; /* Large default size for Sanskrit reading */
    line-height: 1.8;
    resize: none;
    outline: none;
    font-family: 'Mukta', sans-serif;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.15);
}

.transcript-editor-container textarea:focus {
    border-color: var(--primary);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.15), 0 0 0 2px rgba(99, 102, 241, 0.15);
}

/* Save Status Indicator */
.save-status {
    position: absolute;
    bottom: 40px;
    right: 40px;
    background-color: var(--success);
    color: white;
    padding: 10px 18px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(16, 185, 129, 0.3);
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0;
    transform: translateY(10px);
    pointer-events: none;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.save-status.show {
    opacity: 1;
    transform: translateY(0);
}

/* Loader spinner keyframe */
.loader-spinner {
    width: 24px;
    height: 24px;
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-top: 2px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background-color: rgba(255, 255, 255, 0.08);
    border-radius: 4px;
}

body.light-mode ::-webkit-scrollbar-thumb {
    background-color: rgba(0, 0, 0, 0.08);
}

::-webkit-scrollbar-thumb:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

/* Empty states */
.empty-state, .error-msg {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 32px;
    color: var(--text-muted);
    font-size: 13px;
    text-align: center;
    gap: 12px;
}

.empty-state i, .error-msg i {
    font-size: 24px;
}

/* Source selector next to zoom controls */
.source-select-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-right: 12px;
}

.source-select-wrapper label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#image-source-select {
    background-color: var(--item-hover);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    font-size: 12px;
    padding: 6px 12px;
    border-radius: 6px;
    outline: none;
    cursor: pointer;
    font-weight: 500;
}

#image-source-select:hover {
    border-color: var(--primary);
}

body.light-mode #image-source-select {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--text-main);
}