/**
 * 𒈨𒁾 ME.DUB CSS — Pattern Language Node Canvas (Light Theme)
 * Layout: Left sidebar (Library) | Center (Infinite Canvas) | Right (Inspector)
 */

/* ============================================
   Root Layout — 3-Panel Grid
   ============================================ */

.medub-layout {
    display: grid;
    grid-template-columns: 240px 1fr 0px;
    height: 100%;
    overflow: hidden;
    background: var(--bg-primary);
    transition: grid-template-columns 0.3s ease;
}

.medub-layout.inspector-open {
    grid-template-columns: 240px 1fr 320px;
}

/* ============================================
   Left Sidebar — Pattern Library
   ============================================ */

.medub-sidebar {
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    background: var(--bg-secondary);
    overflow: hidden;
}

.medub-sidebar-header {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.medub-sidebar-title {
    font-size: 13px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.medub-sidebar-title .medub-cuneiform {
    font-size: 16px;
    opacity: 0.7;
}

.medub-search-wrap {
    position: relative;
}

.medub-search-input {
    width: 100%;
    padding: 7px 10px 7px 32px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 12px;
    font-family: inherit;
    outline: none;
    transition: all 0.15s;
}

.medub-search-input::placeholder {
    color: var(--text-muted);
}

.medub-search-input:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle);
}

.medub-search-icon {
    position: absolute;
    left: 9px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* Scale group sections */
.medub-scale-group {
    border-bottom: 1px solid var(--border-color);
}

.medub-scale-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    cursor: pointer;
    transition: background 0.15s;
    user-select: none;
}

.medub-scale-header:hover {
    background: var(--bg-tertiary);
}

.medub-scale-chevron {
    color: var(--text-muted);
    transition: transform 0.2s;
    flex-shrink: 0;
}

.medub-scale-header.open .medub-scale-chevron {
    transform: rotate(90deg);
}

.medub-scale-label {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    flex: 1;
}

.medub-scale-count {
    font-size: 10px;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    padding: 1px 6px;
    border-radius: var(--radius-full);
}

.medub-pattern-list {
    padding: 2px 8px 6px;
    overflow: hidden;
}

.medub-pattern-list.collapsed {
    display: none;
}

/* Library pattern items (draggable) */
.medub-lib-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 8px;
    border-radius: var(--radius-sm);
    cursor: grab;
    transition: all 0.15s;
    border: 1px solid transparent;
    margin-bottom: 2px;
}

.medub-lib-item:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
}

.medub-lib-item:active {
    cursor: grabbing;
    opacity: 0.7;
}

.medub-lib-item.on-canvas {
    opacity: 0.5;
}

.medub-lib-num {
    font-size: 10px;
    font-weight: 700;
    color: var(--text-muted);
    min-width: 28px;
    text-align: center;
    background: var(--bg-tertiary);
    padding: 2px 4px;
    border-radius: var(--radius-xs);
}

.medub-lib-name {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-primary);
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.medub-lib-confidence {
    font-size: 10px;
    color: #D4A017;
    flex-shrink: 0;
}

.medub-sidebar-list {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

.medub-sidebar-list::-webkit-scrollbar {
    width: 4px;
}

.medub-sidebar-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

/* ============================================
   Center — Canvas Area
   ============================================ */

.medub-canvas-area {
    position: relative;
    overflow: hidden;
    background: var(--bg-primary);
}

.medub-canvas-toolbar {
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 2px;
    padding: 4px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    z-index: 20;
}

.medub-tool-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.medub-tool-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.medub-tool-btn.active {
    background: var(--accent-light);
    color: var(--accent);
}

.medub-tool-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.medub-tool-sep {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 4px;
}

.medub-tool-btn[title]::after {
    content: attr(title);
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    padding: 3px 8px;
    background: var(--text-primary);
    color: var(--text-inverse);
    font-size: 10px;
    font-weight: 600;
    border-radius: var(--radius-xs);
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s;
    z-index: 100;
}

.medub-tool-btn:hover[title]::after {
    opacity: 1;
}

/* Canvas surface */
.medub-canvas-surface {
    position: absolute;
    inset: 0;
    overflow: hidden;
    cursor: grab;
}

.medub-canvas-surface:active {
    cursor: grabbing;
}

.medub-canvas-surface.connecting {
    cursor: crosshair;
}

/* The transformable layer */
.medub-canvas-transform {
    position: absolute;
    transform-origin: 0 0;
    will-change: transform;
}

/* Grid background */
.medub-canvas-grid {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background-image:
        radial-gradient(circle, var(--border-color) 1px, transparent 1px);
    background-size: 24px 24px;
    opacity: 0.5;
}

/* SVG overlay for edges */
.medub-canvas-edges {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 1;
}

.medub-edge-path {
    fill: none;
    stroke: var(--border-strong);
    stroke-width: 2;
    pointer-events: stroke;
    cursor: pointer;
    transition: stroke 0.15s;
}

.medub-edge-path:hover {
    stroke: var(--accent);
    stroke-width: 3;
}

.medub-edge-path.contains {
    stroke: #6B7280;
}

.medub-edge-path.needs {
    stroke: var(--accent);
    stroke-dasharray: 8 4;
}

.medub-edge-path.supports {
    stroke: var(--success);
    stroke-dasharray: 4 4;
}

.medub-edge-arrow {
    fill: var(--border-strong);
}

/* Status bar */
.medub-statusbar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 12px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    font-size: 10px;
    color: var(--text-muted);
    z-index: 20;
}

.medub-status-left,
.medub-status-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.medub-zoom-control {
    display: flex;
    align-items: center;
    gap: 4px;
}

.medub-zoom-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xs);
    background: var(--bg-primary);
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 12px;
    transition: all 0.1s;
}

.medub-zoom-btn:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

/* ============================================
   Pattern Node Cards
   ============================================ */

.medub-node {
    position: absolute;
    width: 300px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    cursor: move;
    z-index: 5;
    transition: box-shadow 0.2s, border-color 0.2s;
    user-select: none;
    font-family: inherit;
}

.medub-node:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

.medub-node.selected {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-subtle), var(--shadow-md);
}

.medub-node.dragging {
    box-shadow: var(--shadow-lg);
    z-index: 50;
    opacity: 0.92;
}

/* Node hero image */
.medub-node-hero {
    position: relative;
    width: 100%;
    height: 100px;
    overflow: hidden;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    background: linear-gradient(135deg, #F0F4FF, #E8ECF4);
}

.medub-node-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.medub-node-hero-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 36px;
    opacity: 0.3;
}

/* Badge overlay */
.medub-node-badge {
    position: absolute;
    top: 8px;
    left: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 8px;
    background: rgba(0, 0, 0, 0.6);
    border-radius: var(--radius-sm);
    backdrop-filter: blur(8px);
}

.medub-node-number {
    font-size: 11px;
    font-weight: 700;
    color: #fff;
}

.medub-node-stars {
    font-size: 10px;
    color: #FBBF24;
    letter-spacing: 1px;
}

/* Menu button */
.medub-node-menu-btn {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 24px;
    height: 24px;
    border: none;
    border-radius: var(--radius-sm);
    background: rgba(0, 0, 0, 0.4);
    color: white;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s;
    backdrop-filter: blur(8px);
}

.medub-node-menu-btn:hover {
    background: rgba(0, 0, 0, 0.7);
}

/* Node body */
.medub-node-body {
    padding: 12px;
}

/* Category pill */
.medub-cat-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 10px;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 8px;
}

/* Category color variations */
.medub-cat-pill.regional {
    background: #E8EDF4;
    color: #1E3A5F;
}

.medub-cat-pill.urban {
    background: #E6F0EB;
    color: #2D6A4F;
}

.medub-cat-pill.community {
    background: #F0EBFA;
    color: #7C3AED;
}

.medub-cat-pill.building {
    background: #FDF0E0;
    color: #B45309;
}

.medub-cat-pill.spatial {
    background: #E0F2FE;
    color: #0369A1;
}

.medub-cat-pill.construction {
    background: #F0F0F2;
    color: #374151;
}

.medub-cat-pill.environmental {
    background: #DCFCE7;
    color: #047857;
}

/* Title */
.medub-node-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 6px;
    line-height: 1.3;
}

/* Description */
.medub-node-desc {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.5;
    font-style: italic;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 8px;
}

/* Expand toggle */
.medub-expand-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 0;
    border: none;
    background: none;
    color: var(--accent);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s;
    font-family: inherit;
    width: 100%;
}

.medub-expand-btn:hover {
    color: var(--accent-hover);
}

.medub-expand-chevron {
    transition: transform 0.2s;
}

.medub-expand-btn.open .medub-expand-chevron {
    transform: rotate(180deg);
}

/* Expandable details */
.medub-node-details {
    display: none;
    margin-top: 4px;
}

.medub-node-details.open {
    display: block;
}

.medub-detail-section {
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 6px;
    font-size: 12px;
    line-height: 1.5;
}

.medub-detail-label {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.medub-detail-text {
    color: var(--text-primary);
}

.medub-section-problem {
    background: #FEF2F2;
}

.medub-section-problem .medub-detail-label {
    color: #DC2626;
}

.medub-section-forces {
    background: #FFFBEB;
}

.medub-section-forces .medub-detail-label {
    color: #D97706;
}

.medub-section-solution {
    background: #F0FDF4;
}

.medub-section-solution .medub-detail-label {
    color: #16A34A;
}

/* Context */
.medub-section-context {
    background: #F8F9FA;
    border-left: 3px solid #9CA3AF;
}

.medub-section-context .medub-detail-label {
    color: #6B7280;
}

/* Quote */
.medub-section-quote {
    background: linear-gradient(135deg, #FFFBF0, #FFF8E6);
    border-left: 3px solid #D4A017;
    padding: 10px 12px;
}

.medub-quote-text {
    font-style: italic;
    font-size: 12px;
    line-height: 1.6;
    color: #78350F;
}

/* Principles */
.medub-section-principles {
    background: #F5F3FF;
}

.medub-section-principles .medub-detail-label {
    color: #7C3AED;
}

.medub-principles-list {
    margin: 0;
    padding-left: 18px;
    font-size: 11px;
    line-height: 1.7;
    color: var(--text-primary);
}

.medub-principles-list li {
    margin-bottom: 2px;
}

/* Examples */
.medub-section-examples {
    background: #EFF6FF;
}

.medub-section-examples .medub-detail-label {
    color: #1D4ED8;
}

.medub-example-item {
    font-size: 11px;
    line-height: 1.5;
    color: var(--text-secondary);
    padding: 3px 0;
    display: flex;
    align-items: flex-start;
    gap: 6px;
}

.medub-example-marker {
    font-weight: 700;
    flex-shrink: 0;
    font-size: 12px;
}

.medub-example-item .medub-example-marker:first-child {
    color: #16A34A;
}

/* Dimensions */
.medub-section-dimensions {
    background: #F0F9FF;
}

.medub-section-dimensions .medub-detail-label {
    color: #0369A1;
}

.medub-dimensions-list {
    margin: 0;
    padding-left: 18px;
    font-size: 11px;
    line-height: 1.7;
    color: var(--text-primary);
}

.medub-dimensions-list li {
    margin-bottom: 2px;
}

/* Connections */
.medub-connections {
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
    margin-top: 8px;
}

.medub-conn-row {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 4px;
    flex-wrap: wrap;
}

.medub-conn-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 3px;
    min-width: 20px;
}

.medub-conn-chip {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    border: 1px solid var(--border-color);
    background: var(--bg-tertiary);
    color: var(--text-secondary);
}

.medub-conn-chip:hover {
    background: var(--accent-light);
    border-color: var(--accent);
    color: var(--accent);
}

.medub-conn-chip.on-canvas {
    background: var(--accent-subtle);
    border-color: var(--accent);
    color: var(--accent);
}

/* Tags */
.medub-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    padding-top: 8px;
}

.medub-tag {
    padding: 2px 8px;
    border-radius: var(--radius-full);
    font-size: 10px;
    color: var(--text-muted);
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    gap: 3px;
}

/* Connection handles */
.medub-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 2px solid var(--border-strong);
    z-index: 10;
    cursor: crosshair;
    transition: all 0.15s;
}

.medub-handle:hover {
    background: var(--accent);
    border-color: var(--accent);
    transform: scale(1.3);
}

.medub-handle.connecting {
    background: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 6px var(--accent);
}

.medub-handle-top {
    top: -5px;
    left: 50%;
    transform: translateX(-50%);
}

.medub-handle-bottom {
    bottom: -5px;
    left: 50%;
    transform: translateX(-50%);
}

.medub-handle-left {
    left: -5px;
    top: 50%;
    transform: translateY(-50%);
}

.medub-handle-right {
    right: -5px;
    top: 50%;
    transform: translateY(-50%);
}

.medub-handle-top:hover,
.medub-handle-bottom:hover {
    transform: translateX(-50%) scale(1.3);
}

.medub-handle-left:hover,
.medub-handle-right:hover {
    transform: translateY(-50%) scale(1.3);
}

/* ============================================
   Right Panel — Inspector
   ============================================ */

.medub-inspector {
    display: flex;
    flex-direction: column;
    border-left: 1px solid var(--border-color);
    background: var(--bg-secondary);
    overflow: hidden;
}

.medub-inspector-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}

.medub-inspector-title {
    font-size: 12px;
    font-weight: 700;
    color: var(--text-primary);
}

.medub-inspector-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s;
}

.medub-inspector-close:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.medub-inspector-body {
    flex: 1;
    overflow-y: auto;
    padding: 12px;
}

.medub-inspector-body::-webkit-scrollbar {
    width: 4px;
}

.medub-inspector-body::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

.medub-inspector-empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-muted);
    padding: 20px;
}

.medub-inspector-empty-icon {
    font-size: 40px;
    margin-bottom: 12px;
    opacity: 0.4;
}

.medub-inspector-empty h4 {
    font-size: 13px;
    color: var(--text-secondary);
    margin: 0 0 4px;
}

.medub-inspector-empty p {
    font-size: 11px;
    line-height: 1.5;
    margin: 0;
}

/* Inspector pattern details */
.medub-insp-hero {
    width: 100%;
    height: 120px;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #F0F4FF, #E8ECF4);
}

.medub-insp-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.medub-insp-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.medub-insp-title-ar {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    direction: rtl;
    margin-bottom: 12px;
}

.medub-insp-section {
    margin-bottom: 12px;
}

.medub-insp-section-title {
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.medub-insp-section-text {
    font-size: 12px;
    line-height: 1.6;
    color: var(--text-primary);
}

/* AI chat section in inspector */
.medub-ai-section {
    border-top: 1px solid var(--border-color);
    padding-top: 12px;
    margin-top: 12px;
}

.medub-ai-input-wrap {
    display: flex;
    gap: 6px;
    margin-top: 8px;
}

.medub-ai-input {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 12px;
    font-family: inherit;
    outline: none;
}

.medub-ai-input:focus {
    border-color: var(--accent);
}

.medub-ai-send {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-md);
    background: var(--accent);
    color: white;
    cursor: pointer;
    transition: background 0.15s;
}

.medub-ai-send:hover {
    background: var(--accent-hover);
}

/* ============================================
   Context Menu (Node right-click)
   ============================================ */

.medub-context-menu {
    position: fixed;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 4px;
    min-width: 180px;
    z-index: 1000;
    animation: medub-menu-in 0.12s ease;
}

@keyframes medub-menu-in {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-4px);
    }

    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.medub-ctx-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-primary);
    font-size: 12px;
    font-family: inherit;
    cursor: pointer;
    width: 100%;
    text-align: left;
    transition: background 0.1s;
}

.medub-ctx-item:hover {
    background: var(--bg-tertiary);
}

.medub-ctx-item.danger {
    color: var(--danger);
}

.medub-ctx-item.danger:hover {
    background: var(--danger-light);
}

.medub-ctx-sep {
    height: 1px;
    background: var(--border-color);
    margin: 4px 0;
}

/* ============================================
   Minimap
   ============================================ */

.medub-minimap {
    position: absolute;
    bottom: 38px;
    left: 10px;
    width: 160px;
    height: 100px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    z-index: 15;
    opacity: 0.85;
    transition: opacity 0.2s;
}

.medub-minimap:hover {
    opacity: 1;
}

.medub-minimap-canvas {
    width: 100%;
    height: 100%;
}

.medub-minimap-viewport {
    position: absolute;
    border: 2px solid var(--accent);
    border-radius: 2px;
    background: rgba(37, 99, 235, 0.08);
    pointer-events: none;
}

/* ============================================
   Empty Canvas State
   ============================================ */

.medub-empty-canvas {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--text-muted);
    pointer-events: none;
    z-index: 2;
}

.medub-empty-canvas-icon {
    font-size: 56px;
    margin-bottom: 16px;
    opacity: 0.3;
}

.medub-empty-canvas h3 {
    font-size: 16px;
    color: var(--text-secondary);
    margin: 0 0 6px;
    font-weight: 600;
}

.medub-empty-canvas p {
    font-size: 12px;
    line-height: 1.5;
    max-width: 300px;
    margin: 0 auto;
}

/* ============================================
   Drag Ghost (for library drag)
   ============================================ */

.medub-drag-ghost {
    position: fixed;
    padding: 6px 12px;
    background: var(--accent);
    color: white;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    pointer-events: none;
    z-index: 9999;
    box-shadow: var(--shadow-lg);
    transform: translate(-50%, -50%);
    white-space: nowrap;
}

/* ============================================
   Node animation
   ============================================ */

@keyframes medub-node-in {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.medub-node.entering {
    animation: medub-node-in 0.25s ease;
}

/* ============================================
   Media Gallery (Card + Inspector)
   ============================================ */

.medub-media-gallery {
    display: flex;
    gap: 6px;
    flex-wrap: wrap;
    padding: 6px 0;
}

.medub-media-thumb {
    width: 56px;
    height: 56px;
    border-radius: var(--radius-sm);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s;
    position: relative;
    flex-shrink: 0;
}

.medub-media-thumb:hover {
    border-color: var(--accent);
    transform: scale(1.08);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.medub-media-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* Inspector gallery — larger thumbs */
.medub-insp-media-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 8px;
    padding: 4px 0;
}

.medub-insp-media-thumb {
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    border: 2px solid var(--border-color);
    transition: all 0.2s;
    position: relative;
}

.medub-insp-media-thumb:hover {
    border-color: var(--accent);
    transform: scale(1.04);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.medub-insp-media-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* ============================================
   PDF Badge (Card Hero Overlay)
   ============================================ */

.medub-pdf-badge {
    position: absolute;
    bottom: 8px;
    right: 8px;
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 3px 8px;
    background: rgba(220, 38, 38, 0.85);
    color: #fff;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 700;
    backdrop-filter: blur(8px);
    cursor: pointer;
    transition: all 0.15s;
    z-index: 5;
}

.medub-pdf-badge:hover {
    background: rgba(220, 38, 38, 1);
    transform: scale(1.05);
}

/* ============================================
   PDF Section (Inspector)
   ============================================ */

.medub-pdf-section {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: 12px;
}

.medub-pdf-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: linear-gradient(135deg, #FEF2F2, #FFF5F5);
    border-bottom: 1px solid var(--border-color);
}

.medub-pdf-info {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    color: #DC2626;
}

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

.medub-pdf-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.medub-pdf-btn:hover {
    background: var(--accent-light);
    border-color: var(--accent);
    color: var(--accent);
}

.medub-pdf-btn.primary {
    background: #DC2626;
    border-color: #DC2626;
    color: #fff;
}

.medub-pdf-btn.primary:hover {
    background: #B91C1C;
}

.medub-pdf-embed {
    width: 100%;
    height: 400px;
    border: none;
    display: block;
}

.medub-pdf-embed-collapsed {
    display: none;
}

/* ============================================
   Image Lightbox
   ============================================ */

.medub-lightbox {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    animation: medub-lb-in 0.2s ease;
    cursor: pointer;
}

@keyframes medub-lb-in {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.medub-lightbox img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-lg, 8px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    cursor: default;
}

.medub-lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: none;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.15s;
    backdrop-filter: blur(8px);
}

.medub-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.medub-lightbox-caption {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    border-radius: var(--radius-full, 20px);
    font-size: 12px;
    font-weight: 500;
    backdrop-filter: blur(8px);
    white-space: nowrap;
}

/* ============================================
   Temp connection line (while dragging from handle)
   ============================================ */

.medub-temp-edge {
    stroke: var(--accent);
    stroke-width: 2;
    stroke-dasharray: 6 4;
    fill: none;
    pointer-events: none;
}