/**
 * Node styles - node types, content, zoom levels, tooltips, markdown
 */

/* Nodes */
.node-wrapper {
    overflow: visible;
}

.node {
    position: relative;
    width: 100%;
    min-width: 200px;
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid transparent;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.1s;
    cursor: pointer;
    overflow: visible;
}

.node:hover {
    box-shadow: var(--shadow-lg);
}

.node.selected {
    border-color: var(--selection-color);
    border-width: 3px;
    box-shadow: var(--shadow-lg), 0 0 0 4px rgba(34, 139, 230, 0.3);
    outline: 2px dashed var(--selection-color);
    outline-offset: 4px;
}

.node.copy-flash {
    animation: copy-flash 0.3s ease;
}

@keyframes copy-flash {
    0%, 100% { background-color: inherit; }
    50% { background-color: var(--success); opacity: 0.8; }
}

.node.faded {
    opacity: 0.4;
    transition: opacity 0.2s ease;
}

.node.context-ancestor {
    border-color: var(--selection-color);
    background: var(--context-highlight);
}

/* Ancestors should be less faded than non-ancestors */
.node.faded.context-ancestor {
    opacity: 0.85;
}

/* Nodes highlighted by tag filter */
.node.tag-highlighted {
    box-shadow: 0 0 0 3px var(--selection-color), var(--shadow-md);
}

/* Edges faded during tag highlighting */
.edge.faded {
    opacity: 0.15;
    transition: opacity 0.2s ease;
}

.node.dragging {
    opacity: 0.8;
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

/* Node Types */
.node.human {
    background: var(--node-human);
    border-color: var(--node-human-border);
}

.node.ai {
    background: var(--node-ai);
    border-color: var(--node-ai-border);
}

.node.note {
    background: var(--node-note);
    border-color: var(--node-note-border);
}

.node.summary {
    background: var(--node-summary);
    border-color: var(--node-summary-border);
}

.node.reference {
    background: var(--node-reference);
    border-color: var(--node-reference-border);
}

.node.search {
    background: var(--node-search);
    border-color: var(--node-search-border);
}

.node.research {
    background: var(--node-research);
    border-color: var(--node-research-border);
}

.node.highlight {
    background: var(--node-highlight);
    border-color: var(--node-highlight-border);
    border-style: dashed;
}

.node.opinion {
    background: var(--node-opinion);
    border-color: var(--node-opinion-border);
}

.node.synthesis {
    background: var(--node-synthesis);
    border-color: var(--node-synthesis-border);
}

.node.review {
    background: var(--node-review);
    border-color: var(--node-review-border);
}

.node.pdf {
    background: var(--node-pdf);
    border-color: var(--node-pdf-border);
}

.node.image {
    background: var(--node-image);
    border-color: var(--node-image-border);
}

.node.flashcard {
    background: var(--node-flashcard);
    border-color: var(--node-flashcard-border);
}

/* Source text highlight - shown in parent node when a highlight excerpt is selected */
.source-highlight {
    background: var(--node-highlight);
    color: inherit;
    padding: 2px 0;
    /* Use box-decoration-break to make multi-element highlights appear contiguous */
    box-decoration-break: clone;
    -webkit-box-decoration-break: clone;
    animation: sourceHighlightPulse 2s ease-in-out infinite;
}

/* Apply border-radius and padding only to first/last marks for seamless look */
.node-content .source-highlight:first-of-type {
    padding-left: 4px;
    border-top-left-radius: 3px;
    border-bottom-left-radius: 3px;
}

.node-content .source-highlight:last-of-type {
    padding-right: 4px;
    border-top-right-radius: 3px;
    border-bottom-right-radius: 3px;
}

/* When there's only one highlight, it gets both rounded ends */
.node-content .source-highlight:only-of-type {
    padding: 2px 4px;
    border-radius: 3px;
}

@keyframes sourceHighlightPulse {
    0%, 100% {
        background: var(--node-highlight);
    }
    50% {
        background: color-mix(in srgb, var(--node-highlight) 70%, var(--node-highlight-border));
    }
}

/* Node Summary Overlay (for semantic zoom) */
.node-summary {
    display: flex;
    position: absolute;
    inset: 0;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px;
    text-align: center;
    background: inherit;
    border-radius: inherit;
    gap: 8px;
    cursor: pointer;
    overflow: hidden;
    /* Start hidden - smooth transitions */
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

/* Custom tooltip for node summary - progressive disclosure */
.node-summary::after {
    content: "Double-click to edit title";
    position: absolute;
    bottom: 8px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 8px;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    font-size: 11px;
    font-weight: 400;
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}

.node-summary:hover::after {
    opacity: 1;
}

.node-type-icon {
    font-size: 28px;
    line-height: 1;
    transition: font-size 0.3s ease;
}

.summary-text {
    font-size: 18px;
    font-weight: 500;
    line-height: 1.3;
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
    transition: font-size 0.3s ease, text-align 0.3s ease;
}

/* Smooth transitions for node content elements */
.node-header,
.node-content,
.node-actions,
.resize-handle,
.node-tags {
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

/* Semantic Zoom Levels */

/* Full zoom (scale > 0.6) - normal view */
.zoom-full .node-summary {
    opacity: 0;
    visibility: hidden;
}

.zoom-full .node-header,
.zoom-full .node-content,
.zoom-full .node-actions,
.zoom-full .resize-handle,
.zoom-full .node-tags {
    opacity: 1;
    visibility: visible;
}

/* Summary zoom (scale 0.35-0.6) - show summary, hide details */
.zoom-summary .node-summary {
    opacity: 1;
    visibility: visible;
}

.zoom-summary .node-summary .node-type-icon {
    font-size: 32px;
}

.zoom-summary .node-summary .summary-text {
    font-size: 22px;
}

.zoom-summary .node-header,
.zoom-summary .node-content,
.zoom-summary .node-actions,
.zoom-summary .resize-handle {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Tags remain visible when zoomed out */
.zoom-summary .node-tags {
    opacity: 1;
    visibility: visible;
}

/* Mini zoom (scale < 0.35) - minimal view */
.zoom-mini .node-summary {
    opacity: 1;
    visibility: visible;
    flex-direction: row;
    gap: 12px;
    padding: 20px;
}

.zoom-mini .node-summary .node-type-icon {
    font-size: 48px;
}

.zoom-mini .node-summary .summary-text {
    font-size: 32px;
    text-align: left;
}

.zoom-mini .node-header,
.zoom-mini .node-content,
.zoom-mini .node-actions,
.zoom-mini .resize-handle {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

/* Tags remain visible even at mini zoom */
.zoom-mini .node-tags {
    opacity: 1;
    visibility: visible;
}

/* Reply Tooltip - floating tooltip with input on text selection */
.reply-tooltip {
    position: fixed;
    z-index: 10000;
    background: var(--bg-primary);
    border: 1px solid var(--edge-color-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    min-width: 280px;
    max-width: 400px;
    animation: tooltipFadeIn 0.15s ease-out;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(5px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reply-tooltip-selection {
    margin-bottom: 8px;
    padding: 6px 8px;
    background: var(--node-highlight);
    border-left: 3px solid var(--node-highlight-border);
    border-radius: var(--radius-sm);
}

.reply-tooltip-selection-text {
    font-size: 12px;
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.4;
    display: block;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.reply-tooltip-input-row {
    display: flex;
    gap: 6px;
}

.reply-tooltip-input {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid var(--bg-secondary);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 13px;
    outline: none;
    transition: border-color 0.15s;
}

.reply-tooltip-input:focus {
    border-color: var(--accent);
}

.reply-tooltip-input::placeholder {
    color: var(--text-muted);
}

.reply-tooltip-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-size: 16px;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}

.reply-tooltip-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.02);
}

.reply-tooltip-btn:active {
    transform: scale(0.98);
}

/* Image Action Tooltip */
.image-tooltip {
    position: fixed;
    z-index: 10000;
    background: var(--bg-primary);
    border: 1px solid var(--edge-color-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 8px;
    width: 200px;
    animation: tooltipFadeIn 0.15s ease-out;
}

.image-tooltip-preview {
    width: 100%;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.image-tooltip-img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.image-tooltip-actions {
    display: flex;
    gap: 6px;
}

.image-tooltip-btn {
    flex: 1;
    padding: 8px 12px;
    border: none;
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s, transform 0.1s;
}

.image-tooltip-btn:hover {
    background: var(--accent);
    color: white;
}

.image-tooltip-btn:active {
    transform: scale(0.98);
}

/* Slash Command Menu */
.slash-command-menu {
    position: fixed;
    z-index: 10001;
    background: var(--bg-primary);
    border: 1px solid var(--edge-color-light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 4px;
    min-width: 200px;
    max-width: 320px;
    animation: tooltipFadeIn 0.1s ease-out;
}

.slash-command-item {
    display: flex;
    flex-direction: column;
    gap: 2px;
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.1s;
}

.slash-command-item:hover,
.slash-command-item.selected {
    background: var(--selection-bg);
}

.slash-command-name {
    font-size: 13px;
    font-weight: 600;
    font-family: var(--font-mono);
    color: var(--accent);
}

.slash-command-desc {
    font-size: 12px;
    color: var(--text-muted);
}

.slash-command-hint {
    padding: 6px 12px;
    border-top: 1px solid var(--bg-secondary);
    font-size: 11px;
    color: var(--text-muted);
    text-align: center;
}

.slash-command-hint kbd {
    display: inline-block;
    padding: 1px 4px;
    font-family: var(--font-mono);
    font-size: 10px;
    background: var(--bg-secondary);
    border-radius: 3px;
    border: 1px solid var(--edge-color-light);
    margin: 0 1px;
}

.slash-command-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.slash-command-item.disabled:hover {
    background: transparent;
}

.slash-command-item .requires-exa {
    font-size: 10px;
    color: var(--text-muted);
    font-style: italic;
}

/* Node Header */
.node-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    font-size: 11px;
    color: var(--text-muted);
}

/* Drag Handle */
.drag-handle {
    display: grid;
    grid-template-columns: repeat(2, 5px);
    grid-template-rows: repeat(3, 5px);
    gap: 2px;
    padding: 4px;
    margin: -4px;
    margin-right: 4px;
    cursor: grab;
    border-radius: var(--radius-sm);
    transition: background 0.15s;
}

.drag-handle:hover {
    background: rgba(0, 0, 0, 0.08);
}

.drag-handle:active {
    cursor: grabbing;
    background: rgba(0, 0, 0, 0.12);
}

.grip-dot {
    width: 3px;
    height: 3px;
    background: var(--text-muted);
    border-radius: 50%;
    opacity: 0.6;
}

.drag-handle:hover .grip-dot {
    opacity: 1;
}

.node-type {
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.node-model {
    font-family: var(--font-mono);
}

.node-header .delete-btn {
    margin-left: auto;
    opacity: 0;
    transition: opacity 0.15s, background 0.15s, color 0.15s;
    background: transparent;
    border: none;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
}

.node:hover .node-header .delete-btn {
    opacity: 0.6;
}

.node-header .delete-btn:hover {
    opacity: 1;
    background: rgba(250, 82, 82, 0.15);
    color: var(--danger);
}

/* Node Content */
.node-content {
    padding: 12px;
    padding-right: 18px;  /* Make room for resize-e handle */
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    word-wrap: break-word;
    overflow-wrap: break-word;
    white-space: normal;
}

.node-content::selection {
    background: var(--selection-bg);
}

/* Streaming indicator */
.node-content.streaming::after {
    content: "▋";
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Header buttons (stop/continue) - in node header next to delete */
.header-btn {
    padding: 4px 8px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 12px;
    cursor: pointer;
    transition: all 0.15s;
    display: none;
}

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

.header-btn.stop-btn:hover {
    background: #e03131;
}

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

.header-btn.continue-btn:hover {
    background: #2f9e44;
}

.header-btn.fit-viewport-btn,
.header-btn.reset-size-btn {
    display: inline-flex;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
}

.node:hover .header-btn.fit-viewport-btn,
.node:hover .header-btn.reset-size-btn {
    opacity: 0.6;
}

.header-btn.fit-viewport-btn:hover,
.header-btn.reset-size-btn:hover {
    opacity: 1;
    background: var(--accent);
    color: white;
}

/* Navigation buttons */
.header-btn.nav-parent-btn,
.header-btn.nav-child-btn {
    display: inline-flex;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
    font-size: 14px;
    font-weight: bold;
    min-width: 24px;
    justify-content: center;
}

.node:hover .header-btn.nav-parent-btn,
.node:hover .header-btn.nav-child-btn {
    opacity: 0.6;
}

.header-btn.nav-parent-btn:hover,
.header-btn.nav-child-btn:hover {
    opacity: 1;
    background: var(--accent);
    color: white;
}

/* Disabled state for nav buttons (no parent/child) */
.header-btn.nav-parent-btn.disabled,
.header-btn.nav-child-btn.disabled {
    opacity: 0.2 !important;
    cursor: not-allowed;
    pointer-events: none;
}

.node:hover .header-btn.nav-parent-btn.disabled,
.node:hover .header-btn.nav-child-btn.disabled {
    opacity: 0.2 !important;
}

/* Collapse button styling */
/* Collapse button - visible when node has children */
.header-btn.collapse-btn {
    display: none;  /* Hidden by default, shown via inline style when node has children */
    min-width: 24px;
    padding: 2px 6px;
    font-size: 12px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    opacity: 0;
    transition: opacity 0.15s, background 0.15s;
}

/* When collapse button has content (shown via JS), make it visible on hover */
.node:hover .header-btn.collapse-btn {
    opacity: 0.6;
}

.header-btn.collapse-btn:hover {
    opacity: 1;
    background: var(--accent);
    color: white;
}

.header-btn.collapse-btn.collapsed {
    background-color: var(--accent-light);
    font-weight: 500;
    opacity: 0.8;
}

.node:hover .header-btn.collapse-btn.collapsed {
    opacity: 1;
}

/* Collapsed node/edge hidden state - smooth transition */
.node-wrapper {
    transition: opacity 0.25s ease-out, transform 0.25s ease-out;
}

.node-wrapper.collapsed-hidden {
    opacity: 0;
    transform: scale(0.95);
    pointer-events: none;
    /* Use visibility with delay to fully hide after animation */
    visibility: hidden;
    transition: opacity 0.25s ease-out, transform 0.25s ease-out, visibility 0s 0.25s;
}

/* When becoming visible again, no delay on visibility */
.node-wrapper:not(.collapsed-hidden) {
    visibility: visible;
    transition: opacity 0.25s ease-out, transform 0.25s ease-out, visibility 0s 0s;
}

.edge {
    transition: opacity 0.25s ease-out;
}

.edge.collapsed-hidden {
    opacity: 0;
    pointer-events: none;
}

/* Collapsed-path edge: source is collapsed but target is visible (merge node)
   Shows a dotted, grayed line to indicate a hidden path connection */
.edge.collapsed-path {
    stroke: var(--text-muted) !important;
    stroke-dasharray: 4, 4 !important;
    stroke-width: 2 !important;
    opacity: 0.7;
    animation: fadeInEdge 0.25s ease-out;
}

@keyframes fadeInEdge {
    from {
        opacity: 0;
    }
    to {
        opacity: 0.7;
    }
}

/* Navigation Popover */
.nav-popover {
    position: fixed;
    z-index: 1001;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    max-width: 320px;
    max-height: 300px;
    overflow-y: auto;
}

.nav-popover-title {
    padding: 8px 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-tertiary);
    border-bottom: 1px solid var(--border);
}

.nav-popover-list {
    padding: 4px;
}

.nav-popover-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.15s;
}

.nav-popover-item:hover {
    background: var(--selection-bg);
}

.nav-popover-item.selected {
    background: var(--selection-bg);
    outline: 2px solid var(--border);
    outline-offset: -2px;
}

/* Navigation toast message */
.nav-toast {
    position: fixed;
    background: var(--bg-primary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    padding: 8px 14px;
    border-radius: var(--radius-md);
    font-size: 13px;
    box-shadow: var(--shadow-md);
    pointer-events: none;
    z-index: 1002;
    animation: nav-toast-fade 2s ease-in-out forwards;
}

@keyframes nav-toast-fade {
    0% { opacity: 0; transform: translateY(8px); }
    12% { opacity: 1; transform: translateY(0); }
    88% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(-8px); }
}

.nav-popover-icon {
    font-size: 14px;
    flex-shrink: 0;
}

.nav-popover-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.nav-popover-summary {
    font-size: 12px;
    color: var(--text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

/* Viewport-fitted nodes have scrollable content */
.node.viewport-fitted {
    display: flex;
    flex-direction: column;
    /* Note: overflow is NOT set here so tags (positioned outside) aren't clipped */
    /* The .node-content child handles its own overflow:auto */
}

.node.viewport-fitted .node-content {
    flex: 1;
    overflow: auto;
    min-height: 0;
    /* Prevent scroll chaining - don't pan canvas when reaching scroll boundaries */
    overscroll-behavior: contain;
}

/* Node Actions */
.node-actions {
    display: flex;
    gap: 4px;
    padding: 8px 12px;
    padding-bottom: 16px;  /* Make room for resize-s handle */
    border-top: 1px solid rgba(0, 0, 0, 0.05);
    opacity: 0;
    transition: opacity 0.15s;
    position: relative;
    z-index: 1;
}

.node:hover .node-actions {
    opacity: 1;
}

.node-action {
    padding: 4px 8px;
    border: none;
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-sm);
    font-size: 12px;
    cursor: pointer;
    transition: background 0.15s;
}

.node-action:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* Error node styling */
.node.error-node {
    border-color: var(--danger);
    background: #fff5f5;
}

@media (prefers-color-scheme: dark) {
    .node.error-node {
        background: #2d1f1f;
    }
}

.error-content {
    text-align: center;
    padding: 20px 16px;
}

.error-icon {
    font-size: 32px;
    margin-bottom: 8px;
}

.error-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--danger);
    margin-bottom: 8px;
}

.error-description {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.4;
}

.error-actions {
    display: flex;
    gap: 8px;
    justify-content: center;
}

.error-retry-btn,
.error-dismiss-btn {
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.error-retry-btn {
    background: var(--accent);
    color: white;
}

.error-retry-btn:hover {
    background: var(--accent-hover);
}

.error-dismiss-btn {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.error-dismiss-btn:hover {
    background: var(--border);
}

/* Resize Handles */
.resize-handle {
    position: absolute;
    background: transparent;
    z-index: 10;
    pointer-events: auto;
}

.resize-handle:hover {
    background: var(--accent);
    opacity: 0.3;
}

.resize-e {
    right: 0;
    top: 0;
    width: 8px;
    height: 100%;
    cursor: ew-resize;
    border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
}

.resize-s {
    bottom: 0;
    left: 0;
    width: 100%;
    height: 8px;
    cursor: ns-resize;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.resize-se {
    right: 0;
    bottom: 0;
    width: 20px;
    height: 20px;
    cursor: nwse-resize;
    border-radius: 0 0 var(--radius-lg) 0;
}

.resize-se::after {
    content: "";
    position: absolute;
    right: 3px;
    bottom: 3px;
    width: 8px;
    height: 8px;
    border-right: 2px solid var(--text-muted);
    border-bottom: 2px solid var(--text-muted);
    opacity: 0.5;
}

.node:hover .resize-se::after {
    opacity: 1;
}

/* Markdown Content Styles */
.node-content h1,
.node-content h2,
.node-content h3,
.node-content h4,
.node-content h5,
.node-content h6 {
    margin-top: 0.5em;
    margin-bottom: 0.25em;
    font-weight: 600;
    line-height: 1.3;
}

.node-content h1 { font-size: 1.4em; }
.node-content h2 { font-size: 1.25em; }
.node-content h3 { font-size: 1.1em; }
.node-content h4,
.node-content h5,
.node-content h6 { font-size: 1em; }

.node-content p {
    margin: 0.5em 0;
}

.node-content ul,
.node-content ol {
    margin: 0.5em 0;
    padding-left: 1.5em;
}

.node-content li {
    margin: 0.25em 0;
}

.node-content code {
    background: rgba(0, 0, 0, 0.08);
    padding: 0.15em 0.4em;
    border-radius: 3px;
    font-family: var(--font-mono);
    font-size: 0.9em;
}

.node-content pre {
    background: rgba(0, 0, 0, 0.08);
    padding: 0.75em 1em;
    border-radius: var(--radius-sm);
    overflow-x: auto;
    margin: 0.5em 0;
}

.node-content pre code {
    background: none;
    padding: 0;
    font-size: 0.85em;
}

.node-content blockquote {
    border-left: 3px solid var(--accent);
    margin: 0.5em 0;
    padding-left: 1em;
    color: var(--text-secondary);
}

.node-content a {
    color: var(--accent);
    text-decoration: none;
}

.node-content a:hover {
    text-decoration: underline;
}

.node-content table {
    border-collapse: collapse;
    margin: 0.5em 0;
    width: 100%;
}

.node-content th,
.node-content td {
    border: 1px solid var(--bg-secondary);
    padding: 0.4em 0.6em;
    text-align: left;
}

.node-content th {
    background: var(--bg-secondary);
    font-weight: 600;
}

.node-content hr {
    border: none;
    border-top: 1px solid var(--bg-secondary);
    margin: 1em 0;
}

.node-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
}

/* Image node content (for IMAGE type nodes) */
.image-node-content {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    height: 100%;
    min-height: 150px;
}

.node-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: transform 0.15s ease;
}

.node-image:hover {
    transform: scale(1.02);
}

/* Dark mode adjustments for markdown */
@media (prefers-color-scheme: dark) {
    .node-content code {
        background: rgba(255, 255, 255, 0.1);
    }

    .node-content pre {
        background: rgba(255, 255, 255, 0.08);
    }
}

/* Math rendering adjustments */
.node-content .katex-display {
    margin: 0.5em 0;
    overflow-x: auto;
}

.node-content .katex {
    font-size: 1em;
}

/* =============================================================================
   CSV Node Styles
   ============================================================================= */

.csv-metadata {
    background: var(--color-bg-secondary, #f5f5f5);
    padding: 8px 12px;
    border-radius: var(--radius-sm, 4px);
    margin-bottom: 12px;
    font-size: 0.85em;
    border-left: 3px solid var(--color-accent, #4a9eff);
}

.csv-columns {
    color: var(--color-text-secondary, #666);
    font-size: 0.9em;
}

.csv-preview {
    overflow-x: auto;
}

.csv-preview table {
    font-size: 0.85em;
}

.csv-preview th,
.csv-preview td {
    white-space: nowrap;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* =============================================================================
   Code Node Styles
   ============================================================================= */

.code-node-content {
    display: flex;
    flex-direction: column;
    /* Use flex: 1 instead of height: 100% to work properly in flexbox parent */
    flex: 1;
    min-height: 0;  /* Allow shrinking in flexbox */
}

/* Remove padding from node-content for code nodes - CodeMirror has its own */
.node.code .node-content {
    padding: 0;
}

.code-data-hint {
    background: var(--color-bg-secondary, #f0f4f8);
    color: var(--color-text-secondary, #666);
    padding: 6px 12px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.8em;
    border-bottom: 1px solid var(--color-border, #e0e0e0);
}

/* Generate input (AI code generation) */
.code-generate-input {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    background: var(--color-bg-secondary, #f0f4f8);
    border-bottom: 1px solid var(--color-border, #e0e0e0);
    gap: 8px;
}

.code-generate-input input[type="text"] {
    flex: 1;
    padding: 6px 10px;
    border: 1px solid var(--color-border, #ccc);
    border-radius: 4px;
    font-size: 0.9em;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

.code-generate-input input[type="text"]:focus {
    outline: none;
    border-color: var(--color-accent, #4a9eff);
    box-shadow: 0 0 0 2px rgba(74, 158, 255, 0.1);
}

.code-generate-input select {
    padding: 4px 8px;
    font-size: 0.8em;
    border: 1px solid var(--color-border, #ccc);
    border-radius: 4px;
    background: white;
    cursor: pointer;
}

.code-generate-input button {
    padding: 6px 10px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9em;
    transition: background 0.15s, color 0.15s;
}

.generate-submit-btn {
    background: var(--color-accent, #4a9eff);
    color: white;
}

.generate-submit-btn:hover {
    background: var(--color-accent-dark, #3a8eef);
}

.generate-cancel-btn {
    background: var(--color-bg-tertiary, #e0e0e0);
    color: var(--color-text-secondary, #666);
}

.generate-cancel-btn:hover {
    background: var(--color-bg-hover, #d0d0d0);
}

/* =============================================================================
   Code Display (Read-only syntax-highlighted code)
   Uses highlight.js for syntax coloring, click Edit button to open modal
   ============================================================================= */

.code-display {
    flex: 1;
    min-height: 100px;
    max-height: 400px;
    overflow: auto;
    background: #272822;  /* Monokai background */
    border-radius: 0 0 var(--radius-sm, 4px) var(--radius-sm, 4px);
    cursor: default;
}

.code-display pre {
    margin: 0;
    padding: 0;
    background: none;
}

.code-display code {
    display: block;
    padding: 12px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', Consolas, monospace;
    font-size: 14px;
    line-height: 1.5;
    white-space: pre;
    color: #f8f8f2;  /* Monokai foreground */
    background: none !important;
}

/* Override hljs styles for consistent appearance */
.code-display code.hljs {
    padding: 12px !important;
    background: none !important;
}

.code-state-indicator {
    padding: 6px 12px;
    background: var(--color-accent, #4a9eff);
    color: white;
    font-size: 0.8em;
    text-align: center;
}

.code-node-content.code-running .code-display {
    opacity: 0.7;
}

.code-node-content.code-error .code-display {
    border: 2px solid var(--error, #ff6b6b);
}

.code-error-output {
    background: var(--color-error-bg, #fdf2f2);
    color: var(--color-error, #e74c3c);
    padding: 8px 12px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.8em;
    border-top: 1px solid var(--color-error, #e74c3c);
    white-space: pre-wrap;
    word-break: break-word;
    max-height: 150px;
    overflow: auto;
}

/* Light mode adjustments for code */
@media (prefers-color-scheme: light) {
    .code-data-hint {
        color: var(--text-muted);
        background: var(--bg-secondary);
    }
}

/* =============================================================================
   Code Node Output Panel (External slide-out from underneath)
   ============================================================================= */

.output-panel-wrapper {
    pointer-events: auto;
    overflow: visible;
}

.code-output-panel {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.code-output-panel-inner {
    background: var(--color-bg-primary, #fff);
    border: 1px solid var(--color-border, #e0e0e0);
    border-top: none;
    border-radius: 0 0 var(--radius-md, 8px) var(--radius-md, 8px);
    box-shadow:
        inset 0 8px 12px -8px rgba(0,0,0,0.15),
        0 4px 8px rgba(0,0,0,0.08);
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

/* Scrollable content area */
.code-output-panel-body {
    flex: 1;
    overflow: auto;
    padding: 16px;
    min-height: 0;
}

.code-output-panel.collapsed .code-output-panel-body {
    display: none;
}

.code-output-panel-content {
    min-height: 0;
}

/* Footer with toggle button */
.code-output-panel-footer {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4px 8px;
    background: var(--color-bg-secondary, #f8f8f8);
    border-top: 1px solid var(--color-border, #e8e8e8);
    gap: 8px;
    flex-shrink: 0;
    min-height: 20px;
    position: relative;
}

.code-output-toggle {
    background: none;
    border: none;
    padding: 2px 12px;
    cursor: pointer;
    color: var(--color-text-tertiary, #aaa);
    font-size: 0.7em;
    border-radius: 3px;
    transition: background 0.15s, color 0.15s;
}

.code-output-toggle:hover {
    background: var(--color-bg-hover, #e8e8e8);
    color: var(--color-text-secondary, #666);
}

/* Collapsed state - just show the footer tab */
.code-output-panel.collapsed .code-output-panel-inner {
    border-radius: var(--radius-md, 8px);
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

.code-output-panel.collapsed .code-output-panel-footer {
    border-top: none;
    border-radius: var(--radius-md, 8px);
}

/* Resize handle - inline with toggle */
.code-output-resize-handle {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 6px;
    cursor: ns-resize;
}

.code-output-resize-handle::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 3px;
    background: var(--color-border, #ddd);
    border-radius: 2px;
    transition: background 0.15s;
}

.code-output-resize-handle:hover::before {
    background: var(--color-text-tertiary, #aaa);
}

.code-output-stdout {
    background: var(--color-bg-code, #1e1e1e);
    color: var(--color-text-code, #d4d4d4);
    padding: 8px 10px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85em;
    margin: 0 0 8px 0;
    white-space: pre-wrap;
    word-break: break-word;
}

.code-output-result {
    margin: 0;
}

.code-output-text {
    background: var(--color-bg-code, #1e1e1e);
    color: var(--color-text-code, #d4d4d4);
    padding: 8px 10px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85em;
    white-space: pre-wrap;
    word-break: break-word;
}

.code-output-html {
    background: white;
    border-radius: 4px;
    /* No overflow here - parent .code-output-panel-body handles scrolling */
}

/* Style pandas DataFrame HTML tables */
.code-output-html table {
    border-collapse: collapse;
    font-size: 0.85em;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
}

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

.code-output-html th {
    background: var(--color-bg-tertiary, #f0f0f0);
    font-weight: 600;
}

.code-output-html tr:nth-child(even) {
    background: var(--color-bg-secondary, #fafafa);
}

/* Light mode adjustments for output */
@media (prefers-color-scheme: light) {
    .code-output-stdout,
    .code-output-text {
        background: #f5f5f5;
        color: #333;
    }
}

/* Installation progress display */
.code-install-progress {
    background: var(--color-bg-code, #1e1e1e);
    color: var(--color-text-code, #d4d4d4);
    padding: 12px;
    border-radius: 4px;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', monospace;
    font-size: 0.85em;
    margin: 0 0 8px 0;
    border-left: 3px solid var(--color-primary, #007aff);
}

.install-progress-line {
    padding: 2px 0;
    line-height: 1.6;
}

.install-progress-line:not(:last-child) {
    margin-bottom: 4px;
}

@media (prefers-color-scheme: light) {
    .code-install-progress {
        background: #f0f7ff;
        color: #1a1a1a;
        border-left-color: var(--color-primary, #007aff);
    }
}
