.canvas-container {
    position: relative;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--bg-primary, #f5f5f5);
    background-image: 
        linear-gradient(var(--grid-color, rgba(0,0,0,0.05)) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color, rgba(0,0,0,0.05)) 1px, transparent 1px);
    background-size: 20px 20px;
    cursor: grab;
    outline: none;
}

.canvas-container:focus {
    outline: none;
}

.canvas-viewport {
    position: absolute;
    top: 0;
    left: 0;
    transform-origin: 0 0;
    will-change: transform;
}

.canvas-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: visible;
    pointer-events: none;
}

.canvas-svg path,
.canvas-svg polygon,
.canvas-svg text {
    pointer-events: auto;
}

.canvas-node {
    position: absolute;
    background: var(--bg-secondary, #fff);
    border: 2px solid var(--border-color, #ccc);
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    overflow: hidden;
    cursor: move;
    user-select: none;
    transition: box-shadow 0.15s ease;
}

.canvas-node:hover {
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

.canvas-node.selected {
    border-color: var(--accent-primary, #007bff);
    box-shadow: 0 0 0 2px var(--accent-primary, #007bff), 0 4px 8px rgba(0,0,0,0.15);
}

.canvas-node-header {
    padding: 6px 10px;
    background: var(--bg-tertiary, #f0f0f0);
    font-size: 11px;
    font-weight: 500;
    color: var(--fg-secondary, #666);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.canvas-node-content {
    padding: 10px;
    font-size: 14px;
    line-height: 1.4;
    color: var(--fg-primary, #333);
    overflow: auto;
    flex: 1;
}

.canvas-node-content[contenteditable="true"] {
    outline: none;
    cursor: text;
}

.canvas-node-resize {
    position: absolute;
    right: 0;
    bottom: 0;
    width: 12px;
    height: 12px;
    cursor: se-resize;
    background: linear-gradient(135deg, transparent 50%, var(--border-color, #ccc) 50%);
    opacity: 0;
    transition: opacity 0.15s;
}

.canvas-node:hover .canvas-node-resize {
    opacity: 1;
}

.canvas-shape-diamond {
    transform: rotate(45deg);
    border-radius: 2px;
}

.canvas-shape-diamond .canvas-node-header,
.canvas-shape-diamond .canvas-node-content {
    transform: rotate(-45deg);
}

.canvas-shape-circle {
    border-radius: 50%;
}

.canvas-shape-pill {
    border-radius: 100px;
}

.canvas-node-group {
    background: var(--bg-tertiary, rgba(0,0,0,0.02));
    border-style: dashed;
}

.canvas-collapse-btn {
    padding: 0;
    width: 16px;
    height: 16px;
    border: none;
    background: var(--bg-secondary, #fff);
    border-radius: 2px;
    cursor: pointer;
    font-size: 12px;
    line-height: 1;
}

.canvas-connection-dots {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

.canvas-connection-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--accent-primary, #007bff);
    border: 2px solid var(--bg-secondary, #fff);
    border-radius: 50%;
    opacity: 0;
    cursor: crosshair;
    pointer-events: auto;
    transition: opacity 0.15s, transform 0.15s;
    transform: translate(-50%, -50%);
}

.canvas-node:hover .canvas-connection-dot {
    opacity: 1;
}

.canvas-connection-dot:hover {
    transform: translate(-50%, -50%) scale(1.3);
}

.canvas-connection-top {
    top: 0;
    left: 50%;
}

.canvas-connection-right {
    top: 50%;
    left: 100%;
}

.canvas-connection-bottom {
    top: 100%;
    left: 50%;
}

.canvas-connection-left {
    top: 50%;
    left: 0;
}

.canvas-edge {
    fill: none;
    stroke: var(--fg-tertiary, #999);
    stroke-width: 2;
    cursor: pointer;
}

.canvas-edge:hover {
    stroke: var(--accent-primary, #007bff);
}

.canvas-edge.selected {
    stroke: var(--accent-primary, #007bff);
    stroke-width: 3;
}

.canvas-edge-arrow,
.canvas-edge-arrow-back {
    fill: var(--fg-tertiary, #999);
}

.canvas-edge-group:hover .canvas-edge-arrow,
.canvas-edge-group:hover .canvas-edge-arrow-back {
    fill: var(--accent-primary, #007bff);
}

.canvas-edge-label {
    font-size: 12px;
    fill: var(--fg-secondary, #666);
    pointer-events: none;
}

.canvas-connection-line {
    stroke: var(--accent-primary, #007bff);
    stroke-width: 2;
    stroke-dasharray: 5 5;
    pointer-events: none;
}

.canvas-selection-box {
    position: absolute;
    border: 1px dashed var(--accent-primary, #007bff);
    background: rgba(0, 123, 255, 0.1);
    pointer-events: none;
}

.canvas-controls {
    position: absolute;
    top: 10px;
    right: 10px;
    display: flex;
    gap: 4px;
    z-index: 100;
}

.canvas-control-btn {
    padding: 6px 10px;
    border: 1px solid var(--border-color, #ccc);
    background: var(--bg-secondary, #fff);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    color: var(--fg-primary, #333);
    transition: background 0.15s;
}

.canvas-control-btn:hover {
    background: var(--bg-tertiary, #f0f0f0);
}

.canvas-control-btn.active {
    background: var(--accent-primary, #007bff);
    color: #fff;
    border-color: var(--accent-primary, #007bff);
}

.canvas-minimap {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 150px;
    height: 100px;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    overflow: hidden;
    z-index: 100;
    opacity: 0.8;
}

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

.canvas-minimap-content {
    position: relative;
    width: 100%;
    height: 100%;
}

.canvas-minimap-node {
    position: absolute;
    background: var(--fg-tertiary, #ccc);
    border-radius: 1px;
}

.canvas-minimap-viewport {
    position: absolute;
    border: 2px solid var(--accent-primary, #007bff);
    background: rgba(0, 123, 255, 0.1);
    pointer-events: none;
}

.canvas-context-menu {
    position: fixed;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    min-width: 150px;
    z-index: 1000;
    padding: 4px 0;
}

.canvas-context-item {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 13px;
    color: var(--fg-primary, #333);
}

.canvas-context-item:hover {
    background: var(--bg-tertiary, #f0f0f0);
}

.canvas-context-separator {
    height: 1px;
    background: var(--border-color, #eee);
    margin: 4px 0;
}

.canvas-color-picker,
.canvas-shape-picker {
    position: fixed;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    padding: 8px;
    z-index: 1000;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    max-width: 200px;
}

.canvas-color-swatch {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    transition: transform 0.15s;
}

.canvas-color-swatch:hover {
    transform: scale(1.1);
}

.canvas-color-clear {
    width: 100%;
    padding: 4px;
    margin-top: 4px;
    border: 1px solid var(--border-color, #ccc);
    background: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
}

.canvas-shape-option {
    padding: 6px 12px;
    cursor: pointer;
    font-size: 13px;
    width: 100%;
}

.canvas-shape-option:hover {
    background: var(--bg-tertiary, #f0f0f0);
}

.canvas-export-menu {
    position: absolute;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 100;
    padding: 4px 0;
}

.canvas-export-menu button {
    display: block;
    width: 100%;
    padding: 8px 12px;
    border: none;
    background: none;
    text-align: left;
    cursor: pointer;
    font-size: 13px;
}

.canvas-export-menu button:hover {
    background: var(--bg-tertiary, #f0f0f0);
}

.canvas-embedded-image {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.canvas-embedded-pdf {
    width: 100%;
    height: 100%;
    border: none;
}

.canvas-file-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    padding: 12px;
    color: var(--text-secondary, #666);
    text-decoration: none;
    font-size: 13px;
    background: var(--bg-tertiary, #f5f5f5);
    border-radius: 4px;
}

.canvas-file-link:hover {
    background: var(--bg-secondary, #eee);
    color: var(--text-primary, #333);
}

.canvas-container.presentation-mode {
    background-image: none;
    background: var(--bg-primary, #000);
}

.canvas-container.presentation-mode .canvas-controls,
.canvas-container.presentation-mode .canvas-minimap {
    display: none;
}

.canvas-container.presentation-mode .canvas-node:not(.selected) {
    opacity: 0.3;
}

.canvas-container.presentation-mode .canvas-node.selected {
    opacity: 1;
}

/* ===== CANVAS OVERLAY (Notes Integration) ===== */
.canvas-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary, #faf9f6);
    z-index: 2000;
    display: none;
    flex-direction: column;
}

.canvas-overlay.active {
    display: flex;
}

.canvas-overlay-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color, #e5e5e5);
    background: var(--bg-secondary, #fff);
    gap: 12px;
}

.canvas-header-left {
    display: flex;
    align-items: center;
    gap: 8px;
}

.canvas-overlay-title {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--fg-primary, #1a1a1a);
}

.canvas-header-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.canvas-header-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--fg-secondary, #666);
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
}

.canvas-header-btn:hover {
    background: var(--bg-tertiary, #f0f0f0);
    color: var(--fg-primary, #1a1a1a);
}

.canvas-list-view {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.canvas-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 12px;
}

.canvas-card {
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #e5e5e5);
    border-radius: 8px;
    padding: 16px;
    cursor: pointer;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.canvas-card:hover {
    border-color: var(--accent-primary, #007bff);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.canvas-card-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--fg-primary, #1a1a1a);
    margin: 0 0 8px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}

.canvas-card-title svg {
    color: var(--fg-tertiary, #999);
    flex-shrink: 0;
}

.canvas-card-meta {
    font-size: 13px;
    color: var(--fg-tertiary, #999);
    display: flex;
    gap: 12px;
}

.canvas-card-actions {
    display: flex;
    gap: 8px;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border-color, #e5e5e5);
}

.canvas-card-action {
    padding: 6px 12px;
    font-size: 13px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s;
}

.canvas-card-action.delete {
    background: transparent;
    color: var(--danger-color, #dc3545);
}

.canvas-card-action.delete:hover {
    background: rgba(220, 53, 69, 0.1);
}

.canvas-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 48px 24px;
    text-align: center;
    color: var(--fg-tertiary, #999);
}

.canvas-empty-state svg {
    margin-bottom: 16px;
    opacity: 0.5;
}

.canvas-empty-state h3 {
    margin: 0 0 8px 0;
    font-size: 18px;
    color: var(--fg-secondary, #666);
}

.canvas-empty-state p {
    margin: 0 0 24px 0;
    font-size: 14px;
}

.canvas-create-btn {
    padding: 10px 20px;
    background: var(--accent-primary, #007bff);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.15s;
}

.canvas-create-btn:hover {
    background: var(--accent-secondary, #0056b3);
}

.canvas-editor-view {
    flex: 1;
    overflow: hidden;
}

/* Dark theme support */
.dark .canvas-overlay,
[data-theme="dark"] .canvas-overlay {
    background: var(--bg-primary, #1a1a1a);
}

.dark .canvas-overlay-header,
[data-theme="dark"] .canvas-overlay-header {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #3a3a3a);
}

.dark .canvas-card,
[data-theme="dark"] .canvas-card {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #3a3a3a);
}

.dark .canvas-header-btn:hover,
[data-theme="dark"] .canvas-header-btn:hover {
    background: var(--bg-tertiary, #3a3a3a);
}

/* OLED theme support */
[data-theme="oled"] .canvas-overlay {
    background: #000;
}

[data-theme="oled"] .canvas-overlay-header {
    background: #000;
    border-color: #222;
}

[data-theme="oled"] .canvas-card {
    background: #111;
    border-color: #222;
}

/* ===== BOTTOM TOOLBAR ===== */
.canvas-bottom-toolbar {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 100;
}

.canvas-toolbar-section {
    display: flex;
    align-items: center;
    gap: 2px;
}

.canvas-toolbar-divider {
    width: 1px;
    height: 28px;
    background: var(--border-color, #ccc);
    margin: 0 6px;
}

.canvas-toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    color: var(--fg-secondary, #666);
    font-size: 11px;
    font-weight: 500;
    transition: background 0.15s, color 0.15s;
    min-width: 36px;
    min-height: 36px;
}

.canvas-toolbar-btn:hover {
    background: var(--bg-tertiary, #f0f0f0);
    color: var(--fg-primary, #333);
}

.canvas-toolbar-btn.active,
.canvas-tool-btn.active {
    background: var(--accent-primary, #007bff);
    color: #fff;
}

.canvas-toolbar-btn.active:hover {
    background: var(--accent-primary-hover, #0056b3);
}

.canvas-toolbar-btn svg {
    stroke: currentColor;
}

.canvas-stroke-color-btn {
    padding: 6px;
}

.canvas-color-preview {
    display: block;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    border: 2px solid var(--border-color, #ccc);
}

.canvas-stroke-picker {
    position: absolute;
    display: flex;
    gap: 6px;
    padding: 8px;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 110;
}

.canvas-stroke-swatch {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s, box-shadow 0.15s;
    border: 2px solid transparent;
}

.canvas-stroke-swatch:hover {
    transform: scale(1.15);
}

.canvas-stroke-swatch.active {
    border-color: var(--fg-primary, #333);
    box-shadow: 0 0 0 2px var(--bg-secondary, #fff);
}

/* ===== STROKES ===== */
.canvas-stroke-group {
    pointer-events: auto;
    cursor: pointer;
}

.canvas-stroke-group:hover .canvas-stroke {
    stroke-opacity: 0.8;
}

.canvas-stroke-group.selected .canvas-stroke {
    stroke-dasharray: 4 2;
}

.canvas-stroke-draw .canvas-stroke {
    stroke-linecap: round;
    stroke-linejoin: round;
}

.canvas-stroke-highlighter .canvas-stroke {
    stroke-linecap: round;
    stroke-linejoin: round;
    mix-blend-mode: multiply;
}

.dark .canvas-stroke-highlighter .canvas-stroke,
[data-theme="dark"] .canvas-stroke-highlighter .canvas-stroke,
[data-theme="oled"] .canvas-stroke-highlighter .canvas-stroke {
    mix-blend-mode: screen;
}

.canvas-stroke-eraser .canvas-stroke {
    stroke: var(--bg-primary, #f5f5f5);
}

.canvas-stroke-laser .canvas-stroke {
    stroke: #ff3333;
    stroke-width: 4;
    filter: drop-shadow(0 0 3px #ff3333);
}

@keyframes laser-fade {
    from { opacity: 1; }
    to { opacity: 0; }
}

/* ===== EMPTY STATE HELPER ===== */
.canvas-empty-helper {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--fg-tertiary, #999);
    pointer-events: none;
    z-index: 1;
}

.canvas-empty-helper.hidden {
    display: none;
}

.canvas-empty-helper-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.canvas-empty-title {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: var(--fg-secondary, #666);
}

.canvas-empty-steps {
    display: flex;
    flex-direction: column;
    gap: 12px;
    text-align: left;
    max-width: 320px;
}

.canvas-empty-step {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    line-height: 1.4;
    color: var(--fg-secondary, #666);
}

.canvas-empty-step-num {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 600;
    background: var(--accent-primary, #007bff);
    color: #fff;
    border-radius: 50%;
}

.canvas-empty-step strong {
    color: var(--fg-primary, #333);
}

.canvas-empty-helper p {
    margin: 0;
    font-size: 16px;
}

.canvas-empty-helper-hint {
    font-size: 13px !important;
    opacity: 0.7;
    margin-top: 8px;
}

.dark .canvas-empty-title,
[data-theme="dark"] .canvas-empty-title {
    color: var(--fg-secondary, #aaa);
}

.dark .canvas-empty-step,
[data-theme="dark"] .canvas-empty-step {
    color: var(--fg-secondary, #aaa);
}

.dark .canvas-empty-step strong,
[data-theme="dark"] .canvas-empty-step strong {
    color: var(--fg-primary, #eee);
}

/* ===== KEYBOARD SHORTCUTS HINT ===== */
.canvas-shortcuts-hint {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 16px;
    font-size: 11px;
    color: var(--fg-tertiary, #999);
    z-index: 50;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.canvas-shortcuts-hint:hover {
    opacity: 1;
}

.canvas-shortcut {
    display: flex;
    align-items: center;
    gap: 4px;
}

.canvas-shortcuts-hint kbd {
    display: inline-block;
    padding: 2px 5px;
    font-family: inherit;
    font-size: 10px;
    background: var(--bg-tertiary, #f0f0f0);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 3px;
}

/* ===== SELECTION ACTION BAR ===== */
.canvas-selection-bar {
    position: absolute;
    top: 12px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    z-index: 200;
    animation: slideDown 0.15s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.canvas-selection-count {
    font-size: 13px;
    font-weight: 500;
    color: var(--fg-primary, #333);
    padding-right: 8px;
    border-right: 1px solid var(--border-color, #ddd);
    white-space: nowrap;
}

.canvas-selection-btn {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    background: var(--bg-tertiary, #f0f0f0);
    border: 1px solid transparent;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    color: var(--fg-primary, #333);
    cursor: pointer;
    transition: all 0.15s ease;
}

.canvas-selection-btn:hover {
    background: var(--bg-quaternary, #e0e0e0);
}

.canvas-selection-btn svg {
    flex-shrink: 0;
}

.canvas-selection-btn-delete {
    background: #fee2e2;
    color: #dc2626;
}

.canvas-selection-btn-delete:hover {
    background: #fecaca;
}

.dark .canvas-selection-bar,
[data-theme="dark"] .canvas-selection-bar {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #3a3a3a);
}

.dark .canvas-selection-count,
[data-theme="dark"] .canvas-selection-count {
    color: var(--fg-primary, #eee);
    border-color: var(--border-color, #4a4a4a);
}

.dark .canvas-selection-btn,
[data-theme="dark"] .canvas-selection-btn {
    background: var(--bg-tertiary, #3a3a3a);
    color: var(--fg-primary, #eee);
}

.dark .canvas-selection-btn:hover,
[data-theme="dark"] .canvas-selection-btn:hover {
    background: var(--bg-quaternary, #4a4a4a);
}

.dark .canvas-selection-btn-delete,
[data-theme="dark"] .canvas-selection-btn-delete {
    background: #7f1d1d;
    color: #fca5a5;
}

.dark .canvas-selection-btn-delete:hover,
[data-theme="dark"] .canvas-selection-btn-delete:hover {
    background: #991b1b;
}

[data-theme="oled"] .canvas-selection-bar {
    background: #111;
    border-color: #222;
}

[data-theme="oled"] .canvas-selection-btn {
    background: #222;
}

[data-theme="oled"] .canvas-selection-btn:hover {
    background: #333;
}

/* Hide selection bar in presentation mode */
.canvas-container.presentation-mode .canvas-selection-bar {
    display: none !important;
}

/* ===== NOTE PICKER ===== */
.canvas-note-picker {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 360px;
    max-width: 90vw;
    max-height: 80vh;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.2);
    z-index: 2000;
    display: flex;
    flex-direction: column;
}

.canvas-note-picker-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color, #eee);
    font-weight: 600;
    color: var(--fg-primary, #333);
}

.canvas-note-picker-close {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    font-size: 20px;
    cursor: pointer;
    color: var(--fg-tertiary, #999);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas-note-picker-close:hover {
    background: var(--bg-tertiary, #f0f0f0);
    color: var(--fg-primary, #333);
}

.canvas-note-picker-search {
    margin: 12px 16px;
    padding: 8px 12px;
    border: 1px solid var(--border-color, #ccc);
    border-radius: 6px;
    font-size: 14px;
    background: var(--bg-primary, #f5f5f5);
    color: var(--fg-primary, #333);
}

.canvas-note-picker-search:focus {
    outline: none;
    border-color: var(--accent-primary, #007bff);
}

.canvas-note-picker-list {
    flex: 1;
    overflow-y: auto;
    max-height: 300px;
    padding: 0 8px 12px;
}

.canvas-note-picker-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 6px;
    cursor: pointer;
    color: var(--fg-primary, #333);
    transition: background 0.15s;
}

.canvas-note-picker-item:hover {
    background: var(--bg-tertiary, #f0f0f0);
}

.canvas-note-picker-item svg {
    color: var(--fg-tertiary, #999);
    flex-shrink: 0;
}

.canvas-note-picker-empty {
    padding: 24px;
    text-align: center;
    color: var(--fg-tertiary, #999);
    font-size: 14px;
}

/* Hide toolbar and shortcuts in presentation mode */
.canvas-container.presentation-mode .canvas-bottom-toolbar,
.canvas-container.presentation-mode .canvas-shortcuts-hint,
.canvas-container.presentation-mode .canvas-empty-helper {
    display: none;
}

/* Dark theme support for new elements */
.dark .canvas-bottom-toolbar,
[data-theme="dark"] .canvas-bottom-toolbar {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #3a3a3a);
}

.dark .canvas-toolbar-btn:hover,
[data-theme="dark"] .canvas-toolbar-btn:hover {
    background: var(--bg-tertiary, #3a3a3a);
}

.dark .canvas-shortcuts-hint kbd,
[data-theme="dark"] .canvas-shortcuts-hint kbd {
    background: var(--bg-tertiary, #3a3a3a);
    border-color: var(--border-color, #4a4a4a);
}

.dark .canvas-note-picker,
[data-theme="dark"] .canvas-note-picker {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #3a3a3a);
}

.dark .canvas-note-picker-search,
[data-theme="dark"] .canvas-note-picker-search {
    background: var(--bg-tertiary, #3a3a3a);
    border-color: var(--border-color, #4a4a4a);
}

.dark .canvas-note-picker-item:hover,
[data-theme="dark"] .canvas-note-picker-item:hover {
    background: var(--bg-tertiary, #3a3a3a);
}

/* OLED theme support for new elements */
[data-theme="oled"] .canvas-bottom-toolbar {
    background: #111;
    border-color: #222;
}

[data-theme="oled"] .canvas-toolbar-btn:hover {
    background: #222;
}

[data-theme="oled"] .canvas-shortcuts-hint kbd {
    background: #222;
    border-color: #333;
}

[data-theme="oled"] .canvas-note-picker {
    background: #111;
    border-color: #222;
}

[data-theme="oled"] .canvas-note-picker-search {
    background: #222;
    border-color: #333;
}

[data-theme="oled"] .canvas-note-picker-item:hover {
    background: #222;
}

/* ===== FLOATING ACTION BUTTON (FAB) ===== */
.canvas-fab {
    display: none; /* Hidden on desktop, shown on mobile via media query */
    position: absolute;
    bottom: 80px;
    right: 16px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--accent-primary, #007bff);
    color: white;
    border: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.25);
    cursor: pointer;
    z-index: 150;
    align-items: center;
    justify-content: center;
    transition: transform 0.15s, box-shadow 0.15s;
}

.canvas-fab:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 16px rgba(0,0,0,0.3);
}

.canvas-fab:active {
    transform: scale(0.95);
}

.canvas-fab svg {
    stroke: white;
}

/* ===== MOBILE ZOOM CONTROLS ===== */
.canvas-mobile-zoom {
    display: none; /* Hidden on desktop, shown on mobile via media query */
    position: absolute;
    top: 12px;
    left: 12px;
    flex-direction: row;
    gap: 4px;
    z-index: 100;
}

.canvas-mobile-zoom-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--bg-secondary, #fff);
    border: 1px solid var(--border-color, #ccc);
    color: var(--fg-primary, #333);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.canvas-mobile-zoom-btn:active {
    background: var(--bg-tertiary, #f0f0f0);
}

/* ===== MOBILE RESPONSIVE STYLES ===== */
@media (max-width: 768px) {
    /* Show FAB and mobile zoom on mobile */
    .canvas-fab {
        display: flex;
    }
    
    .canvas-mobile-zoom {
        display: flex;
    }
    
    /* Hide desktop controls on mobile */
    .canvas-controls {
        display: none;
    }
    
    /* Hide minimap on mobile - takes up too much space */
    .canvas-minimap {
        display: none;
    }
    
    /* Hide keyboard shortcuts hint on mobile - no keyboard */
    .canvas-shortcuts-hint {
        display: none;
    }
    
    /* Always show connection dots on selected nodes (touch-friendly) */
    .canvas-node.selected .canvas-connection-dot {
        opacity: 1;
    }
    
    /* Reposition and resize bottom toolbar for mobile */
    .canvas-bottom-toolbar {
        bottom: 12px;
        left: 8px;
        right: 8px;
        transform: none;
        width: auto;
        padding: 4px 6px;
        gap: 2px;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        justify-content: flex-start;
    }
    
    .canvas-bottom-toolbar::-webkit-scrollbar {
        display: none;
    }
    
    /* Smaller toolbar buttons on mobile */
    .canvas-toolbar-btn {
        padding: 6px;
        min-width: 32px;
        min-height: 32px;
    }
    
    .canvas-toolbar-btn svg {
        width: 18px;
        height: 18px;
    }
    
    .canvas-toolbar-divider {
        height: 24px;
        margin: 0 4px;
    }
    
    .canvas-color-preview {
        width: 16px;
        height: 16px;
    }
    
    /* Compact top controls */
    .canvas-controls {
        top: 8px;
        right: 8px;
        gap: 2px;
        flex-wrap: wrap;
        max-width: calc(100% - 16px);
    }
    
    .canvas-control-btn {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    /* Smaller empty state helper on mobile */
    .canvas-empty-helper {
        padding: 0 16px;
        width: 100%;
        max-width: 100%;
        box-sizing: border-box;
    }
    
    .canvas-empty-helper-content {
        gap: 12px;
    }
    
    .canvas-empty-title {
        font-size: 16px;
    }
    
    .canvas-empty-steps {
        max-width: 100%;
        gap: 8px;
    }
    
    .canvas-empty-step {
        font-size: 13px;
        gap: 8px;
    }
    
    .canvas-empty-step-num {
        width: 20px;
        height: 20px;
        font-size: 11px;
    }
    
    .canvas-empty-helper p {
        font-size: 14px;
    }
    
    .canvas-empty-helper-hint {
        font-size: 12px !important;
    }
    
    /* Selection bar adjustments */
    .canvas-selection-bar {
        left: 8px;
        right: 8px;
        transform: none;
        width: auto;
        padding: 6px 10px;
        gap: 6px;
    }
    
    .canvas-selection-count {
        font-size: 12px;
        padding-right: 6px;
    }
    
    .canvas-selection-btn {
        padding: 4px 8px;
        font-size: 11px;
    }
    
    /* Stroke color picker positioning */
    .canvas-stroke-picker {
        left: 8px !important;
        right: 8px !important;
        bottom: 60px !important;
        top: auto !important;
        width: auto !important;
        justify-content: center;
    }
    
    /* Context menu full width on mobile */
    .canvas-context-menu {
        left: 8px !important;
        right: 8px !important;
        width: auto !important;
        max-width: calc(100% - 16px);
    }
    
    /* Note picker full width */
    .canvas-note-picker {
        width: calc(100% - 32px);
        max-width: calc(100% - 32px);
    }
    
    /* Node sizing for mobile touch targets */
    .canvas-node {
        min-width: 120px;
        min-height: 60px;
    }
    
    .canvas-node-content {
        padding: 8px;
        font-size: 13px;
    }
    
    /* Larger connection dots for touch */
    .canvas-connection-dot {
        width: 12px;
        height: 12px;
    }
    
    /* Better touch target for resize handle */
    .canvas-node-resize {
        width: 16px;
        height: 16px;
        opacity: 0.5;
    }
}

/* Extra small screens (phones in portrait) */
@media (max-width: 480px) {
    .canvas-bottom-toolbar {
        bottom: 8px;
        left: 4px;
        right: 4px;
        padding: 3px 4px;
    }
    
    .canvas-toolbar-btn {
        padding: 5px;
        min-width: 28px;
        min-height: 28px;
    }
    
    .canvas-toolbar-btn svg {
        width: 16px;
        height: 16px;
    }
    
    .canvas-toolbar-divider {
        height: 20px;
        margin: 0 2px;
    }
    
    .canvas-controls {
        top: 4px;
        right: 4px;
    }
    
    .canvas-control-btn {
        padding: 3px 6px;
        font-size: 10px;
    }
    
    .canvas-empty-title {
        font-size: 14px;
    }
    
    .canvas-empty-step {
        font-size: 12px;
    }
    
    .canvas-overlay-header {
        padding: 10px 12px;
    }
    
    .canvas-overlay-title {
        font-size: 16px;
    }
    
    /* FAB and mobile zoom adjustments for small screens */
    .canvas-fab {
        bottom: 60px;
        right: 12px;
        width: 48px;
        height: 48px;
    }
    
    .canvas-fab svg {
        width: 20px;
        height: 20px;
    }
    
    .canvas-mobile-zoom {
        top: 8px;
        left: 8px;
    }
    
    .canvas-mobile-zoom-btn {
        width: 36px;
        height: 36px;
    }
}

/* Dark theme for FAB and mobile zoom */
.dark .canvas-mobile-zoom-btn,
[data-theme="dark"] .canvas-mobile-zoom-btn {
    background: var(--bg-secondary, #2a2a2a);
    border-color: var(--border-color, #3a3a3a);
    color: var(--fg-primary, #eee);
}

.dark .canvas-mobile-zoom-btn:active,
[data-theme="dark"] .canvas-mobile-zoom-btn:active {
    background: var(--bg-tertiary, #3a3a3a);
}

/* OLED theme for FAB and mobile zoom */
[data-theme="oled"] .canvas-mobile-zoom-btn {
    background: #111;
    border-color: #222;
    color: #eee;
}

[data-theme="oled"] .canvas-mobile-zoom-btn:active {
    background: #222;
}