:root {
    /* Main Theme Colors */
    --primary: #2563eb;
    --background: #ffffff;
    --surface: #f8fafc;
    --text: #1e293b;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --success: #059669;
    --warning: #d97706;
    --error: #ef4444;
    --bg-preview: #f0f4f8; 
    --primary-hover: #1d4ed8;
    --bg-primary: var(--background);
    --bg-secondary: var(--surface);
    --bg-hover: #f1f5f9;
    --text-primary: var(--text);
    --border-light: var(--border);
}

[data-theme="dark"] {
    --primary: #3b82f6;
    --background: #0f172a;
    --surface: #1e293b;
    --text: #f1f5f9;
    --text-muted: #94a3b8;
    --border: #334155;
    --error: #f87171;
    --bg-preview: #172133;
    --primary-hover: #60a5fa;
    --bg-primary: var(--surface);
    --bg-secondary: var(--background);
    --bg-hover: #334155;
    --text-primary: var(--text);
    --border-light: #2c3a4f;
}

/* --- (The rest of your CSS file from * down to the line before .confirm-overlay is correct) --- */
* { 
    margin: 0; 
    padding: 0; 
    box-sizing: border-box; 
}

body { 
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text);
    font-size: 14px;
    line-height: 1.6;
    height: 100vh;
    overflow: hidden;
    padding: 20px;
}

.app {
    height: calc(100vh - 40px);
    display: grid;
    grid-template-rows: auto 1fr;
    background: var(--background);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
    overflow: hidden;
    border: 1px solid var(--border);
}

[data-theme="dark"] .app {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

/* Header */
.header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    border-radius: 16px 16px 0 0;
}

.logo {
    font-weight: 600;
    color: var(--primary);
    font-size: 16px;
}

.search-input {
    flex: 1;
    max-width: 300px;
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    color: var(--text);
    font-size: 14px;
}

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

.header-actions {
    margin-left: auto; /* Pushes the entire action group to the right */
    display: flex;
    align-items: center;
    gap: 8px;
}

.header-byline {
    font-size: 12px;
    color: var(--text-muted);
    margin-left: 16px; /* Adds some space between the last button and the text */
    white-space: nowrap; /* Prevents the text from wrapping awkwardly */
}

.header-byline a {
    color: var(--primary);
    text-decoration: none;
}
.header-byline a:hover {
    text-decoration: underline;
}

/* --- Table Styles for Preview Pane --- */

.preview-content table {
    width: 100%;
    border-collapse: collapse; /* Removes space between cell borders */
    margin-bottom: 16px; /* Space below the table */
    font-size: 14px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    border-radius: 6px;
    overflow: hidden; /* Ensures border-radius is respected by children */
}

[data-theme="dark"] .preview-content table {
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.preview-content th,
.preview-content td {
    border: 1px solid var(--border);
    padding: 10px 14px; /* More comfortable padding */
    text-align: left;
}

.preview-content th {
    background-color: var(--surface); /* Use the surface color for headers */
    font-weight: 600;
    color: var(--text);
}

/* Add a subtle background to every other row for readability */
.preview-content tr:nth-child(even) {
    background-color: var(--surface);
}

.preview-content tr:hover {
    background-color: var(--bg-hover);
}

/* Pyodide Status Indicator */
.pyodide-status {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 12px;
    transition: all 0.3s ease;
}

.pyodide-status .status-icon {
    font-size: 16px;
    animation: pulse 2s ease-in-out infinite;
}

.pyodide-status .status-text {
    color: var(--text-muted);
    font-weight: 500;
}

.pyodide-status.loading {
    border-color: var(--warning);
    background: rgba(217, 119, 6, 0.1);
}

.pyodide-status.loading .status-text {
    color: var(--warning);
}

.pyodide-status.ready {
    border-color: var(--success);
    background: rgba(5, 150, 105, 0.1);
}

.pyodide-status.ready .status-text {
    color: var(--success);
}

.pyodide-status.ready .status-icon {
    animation: none;
}

.pyodide-status.error {
    border-color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

.pyodide-status.error .status-text {
    color: var(--error);
}

.pyodide-status.error .status-icon {
    animation: shake 0.5s ease-in-out;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.1); opacity: 0.7; }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

[data-theme="dark"] .pyodide-status {
    background: rgba(255, 255, 255, 0.05);
}

[data-theme="dark"] .pyodide-status.loading {
    background: rgba(217, 119, 6, 0.2);
}

[data-theme="dark"] .pyodide-status.ready {
    background: rgba(5, 150, 105, 0.2);
}

[data-theme="dark"] .pyodide-status.error {
    background: rgba(239, 68, 68, 0.2);
}

.btn {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
}

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

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

.btn-primary:hover {
    opacity: 0.9;
}

/* Main Layout */
.main {
    display: grid;
    grid-template-columns: 280px minmax(0, 1fr) 280px;
    height: 100%;
    overflow: hidden;
}

.editor-area {
    position: relative;
    overflow: hidden; 
}

/* Sidebar */
.sidebar {
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100%; 
    overflow: hidden; 
}

.sidebar-header {
    padding: 16px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.note-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.note-item {
    padding: 12px;
    border-radius: 6px;
    cursor: pointer;
    margin-bottom: 4px;
    transition: background 0.2s;
}

.note-item:hover {
    background: var(--background);
}

.note-item.active {
    background: var(--primary);
    color: white;
}

.note-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.note-preview {
    font-size: 12px;
    color: var(--text-muted);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.note-item.active .note-preview {
    color: rgba(255, 255, 255, 0.8);
}

.editor-panes-container {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    overflow-x: auto;
    overflow-y: hidden;
    height: 100%;
}

/* Enhanced Editor Container with Maximize Support */
.editor-container {
    flex: 1;
    min-width: 300px;
    max-width: 800px;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    position: relative;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.editor-container:last-child {
    border-right: none;
}

/* Maximized pane styling */
.editor-container.maximized {
    position: relative;
    z-index: 100;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15) !important;
    border: 2px solid var(--primary) !important;
    border-radius: 8px !important;
    background: var(--background) !important;
    margin: 2px !important;
    min-width: 0 !important;       
    max-width: 100% !important; 
}

[data-theme="dark"] .editor-container.maximized {
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4) !important;
}

/* Enhanced visual feedback for maximized state */
.editor-container.maximized::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--primary), var(--warning));
    border-radius: 10px;
    z-index: -1;
    animation: maximizedGlow 2s ease-in-out infinite alternate;
}

@keyframes maximizedGlow {
    from {
        opacity: 0.5;
    }
    to {
        opacity: 0.8;
    }
}

/* Focus styling */
.editor-container.focused {
    border-right-color: var(--primary);
    border-left: 2px solid var(--primary);
    box-shadow: 0 0 0 1px var(--primary), 0 4px 12px rgba(37, 99, 235, 0.1);
    background: var(--background);
    position: relative;
    z-index: 5;
    transform: translateY(-1px);
}

.editor-container.focused:first-child {
    border-left: 2px solid var(--primary);
}

/* Enhanced focus indicators for maximized state */
.editor-container.maximized.focused {
    border-color: var(--warning) !important;
    box-shadow: 
        0 0 0 2px var(--warning),
        0 8px 32px rgba(0, 0, 0, 0.15) !important;
}

[data-theme="dark"] .editor-container.maximized.focused {
    box-shadow: 
        0 0 0 2px var(--warning),
        0 8px 32px rgba(0, 0, 0, 0.4) !important;
}

/* Ensure proper layout when panes are hidden during maximize */
.editor-panes-container {
    gap: 0;
}

.editor-container[style*="display: none"] {
    display: none !important;
}

/* Resize handle between panes */
.resize-handle {
    width: 6px;
    background: var(--border);
    cursor: col-resize;
    position: relative;
    flex-shrink: 0;
    transition: background-color 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.resize-handle:hover {
    background: var(--primary);
}

.resize-handle:active {
    background: var(--primary);
}

/* Visual indicator on resize handle */
.resize-handle::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 2px;
    height: 30px;
    background: currentColor;
    opacity: 0.3;
    border-radius: 1px;
    pointer-events: none;
}

.resize-handle:hover::before {
    opacity: 0.8;
    background: white;
}

/* Dragging state */
.resize-handle.dragging {
    background: var(--primary);
    z-index: 1000;
}

.resize-handle.dragging::before {
    opacity: 1;
    background: white;
}

/* Prevent text selection during resize */
.resizing {
    user-select: none;
    cursor: col-resize;
}

.resizing * {
    pointer-events: none;
}

.resizing .resize-handle {
    pointer-events: auto;
}

/* Width tooltip for resize feedback */
.width-tooltip {
    position: fixed;
    background: var(--text);
    color: var(--background);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
    pointer-events: none;
    z-index: 1001;
    opacity: 0;
    transition: opacity 0.2s;
    white-space: nowrap;
}

.width-tooltip.visible {
    opacity: 1;
}

/* Dark theme adjustments for resize elements */
[data-theme="dark"] .resize-handle {
    background: var(--border);
}

[data-theme="dark"] .resize-handle:hover {
    background: var(--primary);
}

[data-theme="dark"] .width-tooltip {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
}

/* Editor Header */
.editor-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
}

.editor-title-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.editor-title {
    font-weight: 500;
    color: var(--text);
}

.close-pane-btn {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 18px;
    line-height: 1;
    padding: 2px 4px;
    border-radius: 4px;
}

.close-pane-btn:hover {
    color: var(--text);
    background-color: var(--border);
}

.editor-modes {
    display: flex !important;
    gap: 4px !important;
    align-items: center !important;
}

.mode-btn {
    padding: 6px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--background);
    color: var(--text);
    cursor: pointer;
    font-size: 12px;
}

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

/* Maximize Button Styling */
.maximize-btn {
    padding: 4px 8px !important;
    font-size: 12px !important;
    border: 1px solid var(--border) !important;
    border-radius: 4px !important;
    background: var(--surface) !important;
    color: var(--text) !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
    margin-left: 8px !important;
    min-width: 28px !important;
    display: inline-flex !important;
    align-items: center !important;
    justify-content: center !important;
    position: relative;
    overflow: hidden;
    transition: all 0.2s ease !important;
    position: relative;
    overflow: hidden;
}

.maximize-btn:hover {
    background: var(--primary) !important;
    color: white !important;
    border-color: var(--primary) !important;
    transform: translateY(-1px) !important;
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2) !important;
}

/* Animation for maximize button icon */
.maximize-btn::before {
    font-family: "Font Awesome 5 Free";
    content: "\f065";
    font-weight: 900;
    display: inline-block;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: all 0.3s ease;
}

.maximize-btn.minimized::before {
    content: '\2922';
}

.maximize-btn:active::before {
    width: 100px;
    height: 100px;
}

/* Focused pane maximize button styling */
.editor-container.focused .maximize-btn {
    background: rgba(255, 255, 255, 0.1) !important;
    color: rgba(255, 255, 255, 0.9) !important;
    border-color: rgba(255, 255, 255, 0.2) !important;
}

.editor-container.focused .maximize-btn:hover {
    background: white !important;
    color: var(--primary) !important;
    border-color: white !important;
}

/* Accessibility improvements */
.maximize-btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.maximize-btn:focus:not(:focus-visible) {
    outline: none;
}

.maximize-btn:focus-visible {
    box-shadow: 
        0 0 0 2px var(--background),
        0 0 0 4px var(--primary) !important;
}

/* Tooltip enhancement for maximize button */
.maximize-btn[title] {
    position: relative;
}

.maximize-btn[title]:hover::after {
    content: attr(title);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 8px;
    background: var(--text);
    color: var(--background);
    font-size: 11px;
    border-radius: 4px;
    white-space: nowrap;
    z-index: 1000;
    margin-bottom: 4px;
    opacity: 0;
    animation: fadeInTooltip 0.2s ease forwards;
}

@keyframes fadeInTooltip {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(4px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Focused pane header styling */
.editor-container.focused .editor-header {
    background: linear-gradient(135deg, var(--primary), rgba(37, 99, 235, 0.8));
    color: white;
    position: relative;
}

.editor-container.focused .editor-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--warning);
    box-shadow: 0 0 8px var(--warning);
}

.editor-container.focused .editor-title {
    color: white;
    font-weight: 600;
}

.editor-container.focused .mode-btn {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
    border-color: rgba(255, 255, 255, 0.2);
}

.editor-container.focused .mode-btn.active {
    background: white;
    color: var(--primary);
    border-color: white;
}

.editor-container.focused .mode-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.editor-container.focused .close-pane-btn {
    color: rgba(255, 255, 255, 0.8);
}

.editor-container.focused .close-pane-btn:hover {
    color: white;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Maximized pane header enhancement */
.editor-container.maximized .editor-header {
    background: linear-gradient(135deg, var(--primary), rgba(37, 99, 235, 0.9)) !important;
    color: white !important;
    border-bottom: 2px solid rgba(255, 255, 255, 0.1) !important;
    border-radius: 6px 6px 0 0 !important;
}

.editor-container.maximized .editor-title {
    color: white !important;
    font-weight: 600 !important;
}

.editor-container.maximized .close-pane-btn {
    color: rgba(255, 255, 255, 0.8) !important;
}

.editor-container.maximized .close-pane-btn:hover {
    color: white !important;
    background-color: rgba(255, 255, 255, 0.1) !important;
}

/* Dark theme adjustments */
[data-theme="dark"] .editor-container.focused {
    box-shadow: 0 0 0 1px var(--primary), 0 4px 12px rgba(59, 130, 246, 0.2);
}

[data-theme="dark"] .editor-container.focused .editor-header {
    background: linear-gradient(135deg, var(--primary), rgba(59, 130, 246, 0.8));
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
}

/* Editor Content */
.editor-content {
    flex: 1;
    display: grid;
    overflow: hidden;
}

.editor-content.edit-mode {
    grid-template-columns: 1fr;
}

.editor-content.split-mode {
    grid-template-columns: 1fr 1fr;
}

.editor-content.preview-mode {
    grid-template-columns: 1fr;
}

.editor-pane,
.preview-pane {
    overflow-y: auto;
    background-color: var(--bg-preview);
}

.editor-pane {
    display: flex;
    flex-direction: column;
}

.editor-content.preview-mode .editor-pane {
    display: none;
}

.editor-content.edit-mode .preview-pane {
    display: none;
}

.editor-textarea {
    flex: 1;
    width: 100%;
    border: none;
    outline: none;
    padding: 20px;
    font-family: 'SF Mono', Monaco, Inconsolata, monospace;
    font-size: 14px;
    line-height: 1.6;
    background: var(--background);
    color: var(--text);
    resize: none;
}

/* Subtle focus indicator on textarea */
.editor-container.focused .editor-textarea {
    border-left: 3px solid var(--primary);
    background: var(--background);
}

.preview-content {
    padding: 20px;
    max-width: none;
}

.preview-content h1,
.preview-content h2,
.preview-content h3 {
    margin-bottom: 16px;
    color: var(--text);
}

.preview-content p {
    margin-bottom: 16px;
}

.preview-content pre {
    background: var(--surface);
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin-bottom: 16px;
}

.preview-content code {
    background: var(--surface);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
}

.preview-content pre code {
    background: none;
    padding: 0;
}

/* Wiki Links */
.wikilink {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px dotted var(--primary);
    cursor: pointer;
}

.wikilink:hover {
    background: rgba(37, 99, 235, 0.1);
}

.wikilink.broken {
    color: var(--warning);
    border-bottom-color: var(--warning);
}

/* Right Sidebar */
.right-sidebar {
    background: var(--surface);
    border-left: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow-y: auto;
    transition: all 0.2s;
    border-radius: 0 0 16px 0;
}

.right-sidebar-content {
    padding: 8px;
}

.main.right-sidebar-collapsed {
    grid-template-columns: 280px minmax(0, 1fr) 0;
}

.main.right-sidebar-collapsed .right-sidebar {
    width: 0;
    min-width: 0;
    padding: 0;
    border-left: none;
    overflow: hidden;
}

#toggle-right-sidebar {
    margin-left: 8px;
    font-size: 16px;
    padding: 6px 10px;
    /* Ensure it has a z-index if it ever overlaps */
    position: relative; 
    z-index: 1;
}

#toggle-right-sidebar i {
    transition: transform 0.3s ease-in-out;
}

.main.right-sidebar-collapsed #toggle-right-sidebar i {
    transform: rotate(90deg);
}

.sidebar-section {
    margin-bottom: 20px;
}

.sidebar-section-header {
    padding: 12px 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text);
    border-bottom: 1px solid var(--border);
    margin-bottom: 8px;
}

.word-count-display {
    padding: 0 8px;
    font-size: 14px;
    color: var(--text-muted);
}

.empty-sidebar {
    padding: 16px;
    text-align: center;
    color: var(--text-muted);
    font-size: 14px;
}

/* Backlinks Panel (now in right sidebar) */
.backlinks-list {
    padding: 0;
}

.backlink-item {
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    margin-bottom: 4px;
    transition: background 0.2s;
}

.backlink-item:hover {
    background: var(--background);
}

.backlink-title {
    font-weight: 500;
    margin-bottom: 4px;
}

.backlink-context {
    font-size: 12px;
    color: var(--text-muted);
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* Graph Visualization */
.graph-container {
    padding: 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    margin-bottom: 8px;
}

.graph-container svg {
    width: 100%;
    height: auto;
}

.graph-container svg text {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Graph nodes and links will use CSS custom properties for theming */
.graph-node {
    cursor: pointer;
}

.graph-node.current {
    cursor: default;
}

.graph-link {
    stroke: var(--border);
    stroke-opacity: 0.6;
}

/* Graph Controls Styling */
.graph-controls {
    margin-bottom: 8px;
    display: flex;
    justify-content: center;
    gap: 4px;
    padding: 4px;
}

.step-btn {
    padding: 4px 8px;
    font-size: 11px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: inherit;
}

.step-btn:hover {
    background: var(--background);
    border-color: var(--primary);
    transform: translateY(-1px);
}

.step-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}

/* Graph SVG Container */
.graph-svg-container {
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--background);
    margin-bottom: 8px;
    position: relative;
}

/* Step Legend Styling */
.step-legend {
    pointer-events: none;
    user-select: none;
}

.step-legend text {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 9px;
    fill: var(--text-muted);
}

.step-legend circle {
    stroke: var(--border);
    stroke-width: 1;
}

/* Enhanced graph node styling for different steps */
.graph-container svg .node-step-1 {
    filter: drop-shadow(0 2px 4px rgba(5, 150, 105, 0.3));
}

.graph-container svg .node-step-2 {
    filter: drop-shadow(0 1px 3px rgba(217, 119, 6, 0.3));
}

.graph-container svg .node-step-3 {
    filter: drop-shadow(0 1px 2px rgba(100, 116, 139, 0.2));
}

/* Dark theme adjustments */
[data-theme="dark"] .step-btn {
    background: var(--surface);
    border-color: var(--border);
}

[data-theme="dark"] .step-btn:hover {
    background: var(--background);
}

[data-theme="dark"] .step-btn.active {
    background: var(--primary);
    box-shadow: 0 2px 4px rgba(59, 130, 246, 0.3);
}

[data-theme="dark"] .graph-svg-container {
    background: var(--surface);
}

/* Autocomplete */
.autocomplete {
    position: fixed !important;
    display: block !important;
    visibility: visible !important;
    z-index: 9999 !important;
    opacity: 1 !important;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    max-height: 200px;
    overflow-y: auto;
    min-width: 200px;
}

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

.autocomplete-item {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 14px;
    border-bottom: 1px solid var(--border);
}

.autocomplete-item:last-child {
    border-bottom: none;
}

.autocomplete-item:hover,
.autocomplete-item.selected {
    background: var(--primary);
    color: white;
}

.autocomplete-create {
    font-style: italic;
    color: var(--text-muted);
}

.autocomplete-item.selected.autocomplete-create {
    color: rgba(255, 255, 255, 0.8);
}

/* Status Bar */
.status-bar {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 8px 16px;
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    justify-content: flex-end;
}

/* Empty State */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
}

.empty-state h3 {
    margin-bottom: 8px;
    font-size: 18px;
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

::-webkit-scrollbar-track {
    background: var(--surface);
}

::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 6px;
    border: 3px solid var(--surface);
}

::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-muted);
}

/* Hidden file input */
.hidden {
    display: none;
}

/* Context Menu */
.context-menu {
    position: fixed;
    z-index: 1000;
    width: 200px;
    background-color: var(--surface);
    border-radius: 8px;
    border: 1px solid var(--border);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
    padding: 6px;
    display: flex;
    flex-direction: column;
}

[data-theme="dark"] .context-menu {
    box-shadow: 0 5px 15px rgba(0,0,0,0.3);
}

.context-menu-item {
    font-size: 14px;
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: none;
    border: none;
    text-align: left;
    color: var(--text);
}

.context-menu-item:hover {
    background-color: var(--primary);
    color: white;
}

.context-menu-separator {
    height: 1px;
    background: var(--border);
    margin: 4px 0;
}

/* Embedded Block */
.embedded-block {
    display: block;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 16px;
}

.embedded-block p:last-child {
    margin-bottom: 0;
}

.embedded-block-source {
    font-size: 11px;
    color: var(--text-muted);
    margin-top: 10px;
    text-align: right;
}

.embedded-block-source .wikilink {
    font-size: 11px;
}

.broken-embed {
    border-left: 3px solid var(--warning);
    padding: 8px;
    background: var(--surface);
    color: var(--text-muted);
    font-style: italic;
}

/* Welcome Modal */
.welcome-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.welcome-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.welcome-modal-content {
    position: relative;
    background: var(--background);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 800px;
    max-height: 90vh;
    width: 90%;
    border: 1px solid var(--border);
    overflow: hidden;
}

.welcome-header {
    background: var(--surface);
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.welcome-header h2 {
    margin: 0;
    color: var(--text);
    font-size: 24px;
}

.welcome-close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    line-height: 1;
}

.welcome-close-btn:hover {
    background: var(--border);
    color: var(--text);
}

.welcome-body {
    padding: 20px;
    overflow-y: auto;
    max-height: calc(90vh - 140px);
    color: var(--text);
    line-height: 1.6;
}

.welcome-body h3 {
    color: var(--primary);
    margin: 0 0 16px 0;
    font-size: 20px;
}

.welcome-body h4 {
    color: var(--text);
    margin: 20px 0 8px 0;
    font-size: 16px;
    font-weight: 600;
}

.welcome-body ul {
    margin: 0 0 16px 20px;
    padding: 0;
}

.welcome-body ol {
    margin: 0 0 16px 20px;
    padding: 0;
}

.welcome-body li {
    margin-bottom: 4px;
}

.welcome-body ul ul {
    margin: 4px 0 4px 20px;
}

.welcome-body code {
    background: var(--surface);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 13px;
    color: var(--primary);
}

.welcome-body pre {
    background: var(--surface);
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 16px 0;
    border: 1px solid var(--border);
}

.welcome-body pre code {
    background: none;
    padding: 0;
    color: var(--text);
}

.welcome-body p {
    margin: 0 0 12px 0;
}

.welcome-body strong {
    color: var(--text);
    font-weight: 600;
}

.welcome-footer {
    background: var(--surface);
    padding: 16px 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.welcome-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    cursor: pointer;
}

.welcome-checkbox input[type="checkbox"] {
    margin: 0;
}

/* Dark theme adjustments for modal */
[data-theme="dark"] .welcome-modal-content {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
}

[data-theme="dark"] .welcome-overlay {
    background: rgba(0, 0, 0, 0.7);
}

/* Enhanced Code Execution Styles */
.code-container {
    border: 1px solid var(--border);
    border-radius: 6px;
    margin-bottom: 16px;
    background: var(--surface);
    overflow: hidden;
    position: relative;
}

.code-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: var(--background);
    border-bottom: 1px solid var(--border);
}

.code-header span {
    font-weight: 500;
    font-size: 12px;
    color: var(--text-muted);
    text-transform: uppercase;
}

.execution-counter {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

.run-btn {
    padding: 4px 10px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    transition: background-color 0.2s;
}

.run-btn:hover {
    background-color: #1d4ed8;
}

[data-theme="dark"] .run-btn:hover {
    background-color: #60a5fa;
}

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

.code-container pre {
    margin: 0;
    border-radius: 0;
}

.code-output {
    padding: 12px;
    font-family: 'SF Mono', Monaco, Inconsolata, monospace;
    font-size: 13px;
    background: var(--background);
    border-top: 1px dashed var(--border);
    min-height: 1.5em;
}

.code-output.has-output {
    border-top: 1px solid var(--border);
}

.code-output pre {
    white-space: pre-wrap;
    word-break: break-all;
    margin: 0;
    background: none;
    padding: 0;
}

.code-output .output-text {
    color: var(--text);
    margin-bottom: 8px;
}

.code-output .output-result {
    color: var(--success);
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px dashed var(--border);
}

.code-output .output-error {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
    padding: 8px;
    border-radius: 4px;
}

.code-output .spinner {
    color: var(--text-muted);
    font-style: italic;
}

/* Output type labels */
.output-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 4px;
    font-weight: 500;
}

/* DataFrame table styling */
.code-output table {
    border-collapse: collapse;
    width: 100%;
    margin-top: 8px;
    font-size: 12px;
}

.code-output table th,
.code-output table td {
    border: 1px solid var(--border);
    padding: 4px 8px;
    text-align: left;
}

.code-output table th {
    background: var(--surface);
    font-weight: 600;
}

.code-output table tr:nth-child(even) {
    background: var(--surface);
}

/* Plot output styling */
.code-output img {
    max-width: 100%;
    height: auto;
    margin-top: 8px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

/* Execution number styling */
.execution-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.execution-number {
    font-weight: 500;
    color: var(--primary);
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    .maximize-btn {
        border-width: 2px !important;
    }
    
    .editor-container.maximized {
        border-width: 3px !important;
    }
    
    .pyodide-status {
        border-width: 2px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .editor-container,
    .maximize-btn,
    .maximize-btn::before,
    .editor-container.maximized::before,
    .pyodide-status .status-icon {
        transition: none !important;
        animation: none !important;
    }
}

/* Print styles - hide maximize buttons */
@media print {
    .maximize-btn,
    .pyodide-status {
        display: none !important;
    }
}

/* Responsive adjustments */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }
    
    .app {
        height: calc(100vh - 20px);
        border-radius: 12px;
    }
    
    .header {
        border-radius: 12px 12px 0 0;
        padding: 8px 12px;
    }
    
    .main {
        grid-template-columns: 240px minmax(0, 1fr) 240px;
    }
    
    .resize-handle {
        width: 8px;
    }
    
    .editor-container {
        min-width: 250px;
    }
    
    .resize-handle::before {
        width: 3px;
        height: 40px;
    }
    
    .maximize-btn {
        padding: 3px 6px !important;
        font-size: 11px !important;
        min-width: 24px !important;
        margin-left: 4px !important;
    }
    
    .graph-controls {
        flex-wrap: wrap;
        gap: 2px;
    }
    
    .step-btn {
        padding: 3px 6px;
        font-size: 10px;
    }
    
    .welcome-modal-content {
        width: 95%;
        max-height: 95vh;
        margin: 10px;
    }
    
    .welcome-header {
        padding: 16px;
    }
    
    .welcome-header h2 {
        font-size: 20px;
    }
    
    .welcome-body {
        padding: 16px;
        max-height: calc(95vh - 120px);
    }
    
    .welcome-footer {
        padding: 12px 16px;
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .welcome-checkbox {
        justify-content: center;
    }
    
    .pyodide-status .status-text {
        display: none;
    }
    
    .pyodide-status {
        padding: 6px;
    }
}

/* --- Confirmation Modal Styles --- */

.confirm-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    z-index: 9998;
    display: flex;
    align-items: center;
    justify-content: center;
}

.confirm-modal {
    background-color: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    width: 90%;
    max-width: 400px;
    z-index: 9999;
    overflow: hidden;
}

.confirm-modal-header {
    padding: 16px;
    font-size: 1.1em;
    font-weight: 600;
    border-bottom: 1px solid var(--border-light);
}

.confirm-modal-body {
    padding: 20px 16px;
    line-height: 1.5;
}

.confirm-modal-footer {
    padding: 12px 16px;
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
}

.confirm-btn {
    padding: 8px 16px;
    border: 1px solid var(--border);
    border-radius: 5px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color 0.2s, border-color 0.2s;
}

/* ---  Use --primary instead of --primary-color --- */
.confirm-btn.primary {
    background-color: var(--primary);
    color: white;
    border-color: var(--primary);
}
.confirm-btn.primary:hover {
    background-color: var(--primary-hover);
}

.confirm-btn.danger {
    background-color: #d9534f;
    color: white;
    border-color: #d9534f;
}
.confirm-btn.danger:hover {
    background-color: #c9302c;
}

/* ---  Use --text-primary --- */
.confirm-btn.secondary {
    background-color: var(--bg-primary);
    color: var(--text-primary);
}
.confirm-btn.secondary:hover {
    background-color: var(--bg-hover);
}

/* ---  Added styles for the checkbox --- */
.confirm-modal-skip {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border-light);
    font-size: 0.9em;
    color: var(--text-muted);
}
.confirm-modal-skip label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.folder-item {
    margin: 4px 0;
}

.folder-header {
    padding: 8px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-secondary);
    border-radius: 4px;
    transition: background 0.2s;
}

.folder-header:hover {
    background: var(--bg-hover);
}

.folder-arrow {
    font-size: 10px;
    width: 12px;
}

.folder-name {
    flex: 1;
    font-weight: 500;
}

.folder-count {
    font-size: 11px;
    color: var(--text-muted);
}

.folder-contents {
    margin-left: 20px;
    margin-top: 4px;
}

/* --- Right Sidebar Toggle Styles --- */

.main.right-sidebar-collapsed .right-sidebar {
    width: 0;
    min-width: 0;
    padding: 0;
    border-left: none;
    overflow: hidden;
}