/* ===== CSS Variables & Design Tokens ===== */
:root {
    /* Colors - Modern, friendly palette */
    --primary: #5b21b6;
    --primary-hover: #7c3aed;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --info: #3b82f6;
    
    /* Spacing (4pt grid) */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    
    /* Typography */
    --font-family: 'Inter', system-ui, -apple-system, sans-serif;
    --font-size-sm: 12px;
    --font-size-base: 14px;
    --font-size-lg: 16px;
    
    /* Layout */
    --header-height: 48px;
    --footer-height: 56px;
    --explorer-width: 30%;
    --explorer-min-width: 240px;
    
    /* Z-index */
    --z-header: 100;
    --z-footer: 100;
    --z-command-palette: 200;
    --z-fab: 150;
}

/* Light theme overrides */
[data-bs-theme="light"] {
    --bs-body-bg: #ffffff;
    --bs-body-color: #1f2937;
    --bs-border-color: #e5e7eb;
    --bs-tertiary-bg: #f9fafb;
    --bs-secondary-bg: #f3f4f6;
    
    /* Light theme specific colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Dark theme overrides */
[data-bs-theme="dark"] {
    --bs-body-bg: #0f0f14;
    --bs-body-color: #e4e4e7;
    --bs-border-color: #27272a;
    --bs-tertiary-bg: #18181b;
    --bs-secondary-bg: #1f1f23;
    
    /* Dark theme specific colors */
    --bg-primary: #0f0f14;
    --bg-secondary: #18181b;
    --text-primary: #e4e4e7;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --border-color: #27272a;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.5);
}

/* ===== Base Styles ===== */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    margin: 0;
    padding: 0;
    height: 100vh;
    overflow: hidden;
}

/* ===== App Header ===== */
.app-header {
    height: var(--header-height);
    background: var(--bs-tertiary-bg);
    border-bottom: 1px solid var(--bs-border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--space-4);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
}

.app-title {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.app-title h1 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin: 0;
}

.workspace-selector {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-3);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all 0.2s;
}

.workspace-selector:hover {
    background: var(--bg-secondary);
    box-shadow: var(--shadow-sm);
}

.header-actions {
    display: flex;
    gap: var(--space-2);
}

.icon-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--bs-border-color);
    background: transparent;
    color: var(--bs-body-color);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

/* ===== Main Grid Layout ===== */
.app-grid {
    display: grid;
    grid-template-columns: minmax(var(--explorer-min-width), var(--explorer-width)) 1fr;
    height: calc(100vh - var(--header-height));
    margin-top: var(--header-height);
}

/* ===== Explorer Pane ===== */
.explorer-pane {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Light mode explorer refinements */
[data-bs-theme="light"] .explorer-pane {
    background: #fafbfc;
    border-right: 1px solid #e5e7eb;
}

.explorer-toolbar {
    padding: var(--space-3);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: var(--space-2);
    background: var(--bg-primary);
}

[data-bs-theme="light"] .explorer-toolbar {
    background: white;
    border-bottom: 1px solid #e5e7eb;
    flex-wrap: wrap;
}

.explorer-filters {
    padding: var(--space-3);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: var(--space-3);
    top: 50%;
    transform: translateY(-50%);
    color: var(--bs-secondary-color);
}

.search-box input {
    padding-left: var(--space-8);
    background: var(--bs-body-bg);
    border-color: var(--bs-border-color);
}

.explorer-stats {
    padding: var(--space-2) var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--bs-secondary-color);
    border-bottom: 1px solid var(--bs-border-color);
}

.directory-tree {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-2);
}

/* Directory Item Styles */
.directory-item {
    display: flex;
    align-items: center;
    padding: var(--space-2);
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.15s;
    position: relative;
}

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

[data-bs-theme="light"] .directory-item:hover {
    background: rgba(0, 0, 0, 0.04);
}

.directory-item.selected {
    background: rgba(91, 33, 182, 0.1);
}

[data-bs-theme="light"] .directory-item.selected {
    background: rgba(91, 33, 182, 0.08);
    color: var(--primary);
}

.directory-item input[type="checkbox"] {
    margin-right: var(--space-2);
}

/* Indeterminate checkbox styling for partially selected directories */
.directory-item input[type="checkbox"]:indeterminate {
    opacity: 0.6;
    position: relative;
}

.directory-item input[type="checkbox"]:indeterminate::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 2px;
    background-color: var(--primary);
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

.directory-item > i {
    margin-right: var(--space-2);
    width: 16px;
}

.directory-item > span {
    flex: 1;
    font-size: var(--font-size-sm);
}

/* File size badges with color coding */
.size-badge {
    font-size: var(--font-size-sm);
    padding: 2px 6px;
    border-radius: 4px;
    font-weight: 500;
}

.size-badge.size-small {
    background: var(--bs-secondary-bg);
    color: var(--bs-secondary-color);
}

.size-badge.size-medium {
    background: rgba(var(--bs-warning-rgb), 0.1);
    color: var(--warning);
}

.size-badge.size-large {
    background: rgba(var(--bs-danger-rgb), 0.1);
    color: var(--danger);
}

/* Stale indicator */
.stale-indicator {
    width: 6px;
    height: 6px;
    background: var(--warning);
    border-radius: 50%;
    position: absolute;
    left: 2px;
    top: 50%;
    transform: translateY(-50%);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== Workspace Pane ===== */
.workspace-pane {
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--bs-body-bg);
}

/* Tab Navigation */
.workspace-tabs {
    display: flex;
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 var(--space-3);
}

[data-bs-theme="light"] .workspace-tabs {
    background: #f8fafc;
    border-bottom: 1px solid #e2e8f0;
}

.tab-btn {
    padding: var(--space-3) var(--space-4);
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-base);
    transition: all 0.2s;
}

[data-bs-theme="light"] .tab-btn {
    color: #64748b;
}

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

[data-bs-theme="light"] .tab-btn:hover {
    color: #1e293b;
    background: rgba(100, 116, 139, 0.1);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 500;
}

[data-bs-theme="light"] .tab-btn.active {
    color: var(--primary);
    background: white;
}

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

/* Tab Content */
.tab-content {
    flex: 1;
    overflow: hidden;
}

.tab-pane {
    height: 100%;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

/* Prompt Tab */
.prompt-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
}

#promptInput {
    flex: 1;
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background: var(--bs-tertiary-bg);
    border: 1px solid var(--bs-border-color);
    resize: none;
}

.prompt-footer {
    padding-top: var(--space-3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.token-stats {
    display: flex;
    gap: var(--space-4);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--bs-secondary-color);
}

/* Removed FAB styles - using header button instead */

/* Preview Tab */
.preview-container {
    height: 100%;
    display: flex;
    flex-direction: column;
    padding: var(--space-4);
    padding-bottom: calc(var(--footer-height) + var(--space-4));
}

.selected-files-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: var(--space-4);
    border: 1px solid var(--bs-border-color);
    border-radius: 6px;
    background: var(--bs-tertiary-bg);
}

.selected-file {
    display: flex;
    align-items: center;
    padding: var(--space-3);
    border-bottom: 1px solid var(--bs-border-color);
    gap: var(--space-2);
}

.selected-file:last-child {
    border-bottom: none;
}

.selected-file.pending {
    opacity: 0.7;
    background: rgba(var(--bs-warning-rgb), 0.05);
}

.aggregated-content {
    flex: 1;
    overflow: hidden;
}

#outputArea {
    height: 100%;
    font-family: 'Courier New', monospace;
    font-size: var(--font-size-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
}

[data-bs-theme="light"] #outputArea {
    background: white;
    border: 1px solid #e5e7eb;
    color: #1f2937;
}

/* CodeMirror light mode fixes */
[data-bs-theme="light"] .CodeMirror {
    background: white !important;
    color: #1f2937 !important;
}

[data-bs-theme="light"] .CodeMirror-gutters {
    background: #f9fafb !important;
    border-right: 1px solid #e5e7eb !important;
}

[data-bs-theme="light"] .CodeMirror-linenumber {
    color: #6b7280 !important;
}

[data-bs-theme="light"] .CodeMirror-cursor {
    border-left: 1px solid #374151 !important;
}

/* CodeMirror overrides */
.CodeMirror {
    height: 100%;
    font-size: var(--font-size-base);
    background: var(--bs-tertiary-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: 6px;
}

/* Preview Footer */
.preview-footer {
    position: fixed;
    bottom: 0;
    left: calc(var(--explorer-min-width) + var(--explorer-width));
    right: 0;
    height: var(--footer-height);
    background: var(--bs-tertiary-bg);
    border-top: 1px solid var(--bs-border-color);
    padding: 0 var(--space-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    z-index: var(--z-footer);
}

.footer-stats {
    display: flex;
    gap: var(--space-4);
}

.footer-actions {
    display: flex;
    gap: var(--space-2);
}

/* Command Palette */
.command-palette {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    max-width: 90vw;
    background: var(--bs-body-bg);
    border: 1px solid var(--bs-border-color);
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    z-index: var(--z-command-palette);
}

.command-palette-input {
    position: relative;
    padding: var(--space-4);
    border-bottom: 1px solid var(--bs-border-color);
}

.command-palette-input i {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--bs-secondary-color);
}

.command-palette-input input {
    width: 100%;
    padding: var(--space-3) var(--space-3) var(--space-3) var(--space-8);
    background: transparent;
    border: none;
    outline: none;
    font-size: var(--font-size-lg);
}

.command-results {
    max-height: 400px;
    overflow-y: auto;
}

.command-result-item {
    padding: var(--space-3) var(--space-4);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.command-result-item:hover,
.command-result-item.active {
    background: var(--bs-tertiary-bg);
}

/* Responsive */
@media (max-width: 1280px) {
    .app-grid {
        grid-template-columns: 1fr;
    }
    
    .explorer-pane {
        position: fixed;
        left: -100%;
        top: var(--header-height);
        bottom: 0;
        width: 320px;
        transition: left 0.3s;
        z-index: 90;
    }
    
    .explorer-pane.open {
        left: 0;
    }
    
    .preview-footer {
        left: 0;
    }
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Preview Content Styling */
.CodeMirror .cm-pending-file {
    color: var(--text-warning);
    font-style: italic;
}

.CodeMirror .cm-truncation-notice {
    color: var(--text-muted);
    font-style: italic;
    opacity: 0.8;
}

/* Badge notification */
.badge-notification {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--bs-success);
    color: white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    font-weight: bold;
    animation: pulse 2s ease-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.tab-btn {
    position: relative;
}

/* Prompt Tab Header */
.prompt-tab-header {
    display: flex;
    justify-content: flex-end;
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-primary);
}

[data-bs-theme="light"] .prompt-tab-header {
    background: white;
    border-bottom: 1px solid #e5e7eb;
}

.prompt-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
}

[data-bs-theme="light"] .prompt-container {
    background: white;
}

/* Batch Action Bar */
.batch-action-bar {
    position: absolute;
    bottom: var(--space-4);
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-3) var(--space-4);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    display: flex;
    align-items: center;
    gap: var(--space-4);
    z-index: 10;
    animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

.batch-count {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.batch-actions {
    display: flex;
    gap: var(--space-2);
}

.batch-actions .btn {
    padding: var(--space-1) var(--space-3);
    transition: all 0.2s ease;
}

/* Light mode button hover improvements */
[data-bs-theme="light"] .btn-outline-primary:hover {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

[data-bs-theme="light"] .btn-outline-secondary:hover {
    background-color: var(--text-secondary);
    border-color: var(--text-secondary);
    color: white;
    box-shadow: var(--shadow-sm);
}

[data-bs-theme="light"] .btn-outline-danger:hover {
    background-color: var(--danger);
    border-color: var(--danger);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* Make batch action bar more prominent in light mode */
[data-bs-theme="light"] .batch-action-bar {
    background: white;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    border: 1px solid #e5e7eb;
}

/* Primary button improvements for light mode */
[data-bs-theme="light"] .btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

[data-bs-theme="light"] .btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    box-shadow: 0 4px 6px -1px rgba(91, 33, 182, 0.3);
}

/* Make all buttons more prominent in light mode */
[data-bs-theme="light"] .btn {
    font-weight: 500;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
}

[data-bs-theme="light"] .btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Fix badge visibility in light mode */
[data-bs-theme="light"] .badge.text-bg-secondary {
    background-color: #64748b !important;
    color: white !important;
}

[data-bs-theme="light"] .tab-btn .badge {
    background-color: #64748b !important;
    color: white !important;
}

/* Token Heat Bars */
.token-heat-bar {
    width: 40%;
    max-width: 100px;
    height: 5px;
    background: var(--bg-secondary);
    border-radius: 2.5px;
    overflow: hidden;
    margin-left: auto;
    position: relative;
}

.heat-fill {
    height: 100%;
    background: linear-gradient(to right, 
        hsl(120, 60%, 50%) 0%,      /* Green */
        hsl(60, 60%, 50%) 50%,      /* Yellow */
        hsl(0, 60%, 50%) 100%       /* Red */
    );
    transition: width 0.3s ease;
}

.selected-file .token-heat-bar {
    margin-left: var(--space-3);
}

/* Directory-specific styles */
.directory-heat-bar {
    opacity: 0.8;
    height: 6px;
    max-width: 120px;
}

.directory-file-count {
    font-size: 11px;
    color: var(--text-muted);
    margin-left: auto;
    margin-right: var(--space-2);
    white-space: nowrap;
    flex-shrink: 0;
}

/* Light mode directory info visibility */
[data-bs-theme="light"] .directory-file-count {
    color: #6b7280;
    font-weight: 500;
}

.directory-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* Remove old size badge styles */
.size-small { color: var(--bs-success); }
.size-medium { color: var(--bs-warning); }
.size-large { color: var(--bs-danger); }

/* File Upload Modal Styles */
.upload-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.upload-summary {
    font-size: var(--font-size-base);
    padding: var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--space-2);
    border: 1px solid var(--border-color);
}

[data-bs-theme="light"] .upload-summary {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
}

.file-count {
    font-weight: 600;
    color: var(--primary);
}

.folder-name {
    color: var(--text-primary);
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 0.9em;
}

.upload-note {
    display: flex;
    align-items: flex-start;
    gap: var(--space-2);
    padding: var(--space-3);
    background: rgba(59, 130, 246, 0.1);
    border-radius: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

[data-bs-theme="light"] .upload-note {
    background: rgba(59, 130, 246, 0.05);
    color: #475569;
}

.upload-note i {
    color: var(--info);
    margin-top: 2px;
}

/* Folder Picker Modal Styles */
.folder-picker-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--bg-secondary);
    border-radius: var(--space-2);
    border-left: 3px solid transparent;
}

[data-bs-theme="light"] .info-item {
    background: #f8fafc;
}

.info-item:nth-child(1) {
    border-left-color: var(--info);
}

.info-item:nth-child(2) {
    border-left-color: var(--success);
}

.info-item:nth-child(3) {
    border-left-color: var(--warning);
}

.info-item:nth-child(4) {
    border-left-color: var(--info);
}

.info-item i {
    font-size: 18px;
    margin-top: 2px;
}

.info-item div {
    flex: 1;
    font-size: var(--font-size-sm);
    line-height: 1.5;
}

/* Z-index utility for file detection spinner */
.z-2000 {
    z-index: 2000;
}
}