* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --bg-dark: #1e1e1e;
    --bg-panel: #2d2d2d;
    --bg-input: #3d3d3d;
    --bg-hover: #404040;
    --bg-selected: #4a90d9;
    --border-color: #404040;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --text-muted: #707070;
    --accent-color: #4a90d9;
    --header-height: 50px;
    --footer-height: 36px;
    --panel-left-width: 260px;
    --panel-right-width: 280px;
    --danger-color: #d94a4a;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 13px;
    background: var(--bg-dark);
    color: var(--text-primary);
}

#app {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Header */
.app-header {
    height: var(--header-height);
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 16px;
    gap: 24px;
}

.app-title {
    font-weight: 600;
    font-size: 15px;
    color: var(--text-primary);
}

.file-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-name-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-name-input {
    background: transparent;
    border: 1px solid transparent;
    border-radius: 4px;
    padding: 6px 10px;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    min-width: 120px;
    max-width: 200px;
}

.file-name-input:hover {
    background: var(--bg-input);
    border-color: var(--border-color);
}

.file-name-input:focus {
    outline: none;
    background: var(--bg-input);
    border-color: var(--accent-color);
}

.save-status {
    font-size: 11px;
    color: var(--text-muted);
    min-width: 50px;
}

.save-status.saving {
    color: var(--text-secondary);
}

.save-status.saved {
    color: var(--text-muted);
}

.svg-settings {
    display: flex;
    gap: 16px;
}

.svg-settings label {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 12px;
}

.svg-settings input[type="number"],
.svg-settings input[type="text"] {
    width: 80px;
    padding: 6px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 12px;
}

/* Zoom Controls */
.zoom-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: 16px;
    padding-left: 16px;
    border-left: 1px solid var(--border-color);
}

.zoom-btn {
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 500;
}

.zoom-btn:hover {
    background: var(--bg-hover);
}

#zoom-fit {
    width: auto;
    padding: 0 10px;
    font-size: 11px;
}

#zoom-slider {
    width: 100px;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-input);
    border-radius: 2px;
    cursor: pointer;
}

#zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
}

#zoom-slider::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.zoom-value {
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 45px;
    text-align: center;
}

/* Footer - REMOVED */

/* Buttons */
.btn {
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    background: var(--bg-input);
    color: var(--text-primary);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    transition: background-color 0.15s, border-color 0.15s;
}

.btn:hover {
    background: var(--bg-hover);
    border-color: #555;
}

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

.btn-danger:hover {
    background: #c43c3c;
}

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

/* Main Content - Three Panel Layout */
.main-content {
    flex: 1;
    display: flex;
    overflow: hidden;
}

.panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
}

.panel-left {
    width: var(--panel-left-width);
    flex-shrink: 0;
    border-right: 1px solid var(--border-color);
}

.panel-center {
    flex: 1;
    background: var(--bg-dark);
    overflow: auto;
    position: relative;
}

/* Full viewport canvas */
.panel-center.panel-fullscreen {
    width: 100%;
    height: calc(100vh - var(--header-height));
    position: relative;
}

.canvas-wrapper {
    display: block;
    min-width: 100%;
    min-height: 100%;
    box-sizing: border-box;
}

/* Right panel - REMOVED */

.panel-header {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
}

/* Canvas */
.canvas-container {
    background: white;
    box-shadow: 0 4px 20px rgba(0,0,0,0.4);
    transition: transform 0.1s ease-out;
    flex-shrink: 0;
}

#svg-canvas {
    display: block;
    cursor: crosshair;
}

#svg-canvas.tool-select {
    cursor: default;
}

/* Layers Panel - Dark Theme */
.layers-list {
    list-style: none;
    padding: 8px;
}

.layer-item {
    display: flex;
    align-items: center;
    padding: 8px;
    border-radius: 6px;
    cursor: pointer;
    background: transparent;
    transition: background-color 0.15s;
    margin-bottom: 2px;
    gap: 12px;
}

.layer-item:hover {
    background-color: var(--bg-hover);
}

.layer-item.selected {
    background-color: rgba(74, 144, 217, 0.25);
}

.layer-thumbnail {
    width: 48px;
    height: 48px;
    background: var(--bg-input);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.layer-thumbnail svg {
    width: 32px;
    height: 32px;
}

.layer-info {
    flex: 1;
    min-width: 0;
}

.layer-name {
    font-weight: 500;
    font-size: 13px;
    color: var(--text-primary);
    margin-bottom: 2px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.layer-name-icon {
    color: var(--text-muted);
}

.layer-dimensions {
    font-size: 11px;
    color: var(--text-secondary);
}

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

.layer-visibility {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-color);
}

.layer-duplicate-btn {
    padding: 6px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.15s, background-color 0.15s, color 0.15s;
}

.layer-item:hover .layer-duplicate-btn {
    opacity: 1;
}

.layer-duplicate-btn:hover {
    background-color: var(--bg-hover);
    color: var(--text-primary);
}

.layer-item.dragging {
    opacity: 0.5;
}

.layer-item.drag-over {
    border-top: 2px solid var(--accent-color);
    margin-top: -2px;
}

/* Right Panel - Properties */
.properties-section {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
}

.properties-section:last-child {
    border-bottom: none;
}

.properties-section h3 {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 14px;
}

/* Collapsible section header */
.section-header {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    user-select: none;
    padding: 4px 0;
    margin: -4px 0 10px 0;
    border-radius: 4px;
    transition: background-color 0.15s;
}

.section-header:hover {
    background-color: var(--bg-hover);
    margin-left: -8px;
    margin-right: -8px;
    padding-left: 8px;
    padding-right: 8px;
}

.section-chevron {
    font-size: 10px;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.properties-section.collapsed .section-chevron {
    transform: rotate(-90deg);
}

.section-content {
    overflow: hidden;
    transition: max-height 0.2s ease-out, opacity 0.2s;
    max-height: 1000px;
    opacity: 1;
}

.properties-section.collapsed .section-content {
    max-height: 0;
    opacity: 0;
}

.properties-section.collapsed {
    padding-bottom: 8px;
}

.properties-section.collapsed .section-header {
    margin-bottom: 0;
}

/* Selected Point Section */
.selected-point-section {
    background-color: rgba(74, 144, 217, 0.08);
    border-left: 3px solid var(--accent-color);
}

.selected-point-section .section-header {
    color: var(--accent-color);
}

.selected-point-sublabel {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 12px;
    margin-bottom: 8px;
}

.selected-point-sublabel:first-child {
    margin-top: 0;
}

.property-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.property-row:last-child {
    margin-bottom: 0;
}

.property-field {
    display: flex;
    align-items: center;
    gap: 6px;
    flex: 1;
}

.property-field label {
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 20px;
}

.property-input-wrapper {
    position: relative;
    flex: 1;
}

.property-input {
    width: 100%;
    padding: 8px 32px 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 12px;
    text-align: right;
}

.property-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.property-suffix {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 11px;
    color: var(--text-muted);
    pointer-events: none;
}

/* Property select dropdown */
.property-select {
    flex: 1;
    padding: 8px 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
}

.property-select:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Property range slider */
.property-field input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    background: var(--bg-input);
    border-radius: 3px;
    cursor: pointer;
}

.property-field input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
}

.property-field input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.property-checkbox {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-top: 12px;
}

.property-checkbox input {
    accent-color: var(--accent-color);
}

.property-checkbox label {
    font-size: 12px;
    color: var(--text-secondary);
}

/* Text content input */
.text-content-input {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 13px;
    font-family: inherit;
    resize: vertical;
    min-height: 60px;
}

.text-content-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

/* Color inputs */
.color-field {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-input-wrapper {
    position: relative;
    width: 32px;
    height: 32px;
}

.color-input-wrapper input[type="color"] {
    width: 100%;
    height: 100%;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    padding: 0;
    background: none;
}

.color-input-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.color-input-wrapper input[type="color"]::-webkit-color-swatch {
    border-radius: 3px;
    border: none;
}

.no-color-btn {
    padding: 6px 10px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
}

.no-color-btn:hover {
    background: var(--bg-hover);
}

.no-color-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* Tool buttons - REMOVED (now in ToolsPalette) */

/* Delete button */
.btn-delete {
    width: 100%;
    padding: 10px;
    background: transparent;
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
    border-radius: 4px;
    cursor: pointer;
    font-size: 12px;
    margin-top: 8px;
}

.btn-delete:hover {
    background: var(--danger-color);
    color: white;
}

/* Hint text */
.hint {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 12px;
    padding: 8px;
    background: var(--bg-input);
    border-radius: 4px;
}

/* Handles */
.handle {
    cursor: move;
}

.handle-skew {
    cursor: ns-resize;
}

.handle-tilt {
    cursor: row-resize;
}

/* Shape styling */
/* Only show pointer cursor on shapes when in select mode */
#svg-canvas.tool-select [data-shape-id] {
    cursor: pointer;
}

/* Keep crosshair on shapes when not in select mode */
#svg-canvas:not(.tool-select) [data-shape-id] {
    cursor: crosshair;
}

[data-shape-id]:hover {
    filter: brightness(0.95);
}

/* Hidden state */
[hidden] {
    display: none !important;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--bg-hover);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* File Browser Dialog */
.file-browser-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
}

.file-browser-overlay.open {
    opacity: 1;
    visibility: visible;
}

.file-browser-dialog {
    background: var(--bg-panel);
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.file-browser-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    gap: 16px;
}

.file-browser-header h2 {
    font-size: 16px;
    font-weight: 600;
    margin: 0;
    flex: 1;
}

.file-browser-user {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-browser-user-info {
    display: flex;
    align-items: center;
    gap: 8px;
}

.user-display-name {
    font-size: 12px;
    color: var(--text-secondary);
}

.btn-login,
.btn-logout {
    font-size: 12px;
    padding: 6px 12px;
}

.btn-logout {
    background: var(--bg-input);
    color: var(--text-secondary);
}

.btn-logout:hover {
    background: var(--danger-color);
    color: white;
}

.file-browser-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

.file-browser-close:hover {
    color: var(--text-primary);
}

.file-browser-tabs {
    display: flex;
    gap: 0;
    padding: 0 20px;
    border-bottom: 1px solid var(--border-color);
}

.file-browser-tab {
    background: none;
    border: none;
    padding: 12px 24px;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    border-bottom: 2px solid transparent;
    transition: color 0.15s, border-color 0.15s;
}

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

.file-browser-tab.active {
    color: var(--accent-color);
    border-bottom-color: var(--accent-color);
}

.file-browser-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
}

.file-browser-sort {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-browser-sort label {
    font-size: 12px;
    color: var(--text-secondary);
}

.file-browser-sort-select {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 6px 10px;
    color: var(--text-primary);
    font-size: 12px;
    cursor: pointer;
}

.file-browser-sort-dir {
    padding: 6px 10px;
}

.sort-icon {
    font-size: 14px;
}

.file-browser-content {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
    min-height: 200px;
}

.file-browser-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
}

.file-item {
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    cursor: pointer;
    transition: border-color 0.15s, background-color 0.15s;
    position: relative;
}

.file-item:hover {
    border-color: var(--accent-color);
    background: var(--bg-hover);
}

.file-item-thumbnail {
    width: 100%;
    aspect-ratio: 4/3;
    background: white;
    border-radius: 4px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.file-item-thumbnail svg {
    width: 100%;
    height: 100%;
}

.file-item-placeholder {
    width: 40px;
    height: 40px;
    background: var(--bg-panel);
    border-radius: 4px;
}

.file-item-info {
    min-width: 0;
}

.file-item-name {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.file-item-date {
    font-size: 11px;
    color: var(--text-muted);
}

.file-item-badge {
    display: inline-block;
    font-size: 10px;
    color: var(--accent-color);
    background: rgba(74, 144, 217, 0.1);
    padding: 2px 6px;
    border-radius: 3px;
    margin-top: 4px;
    font-weight: 500;
}

.file-item-delete {
    position: absolute;
    top: 8px;
    right: 8px;
    background: var(--bg-dark);
    border: none;
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
    line-height: 1;
    opacity: 0;
    transition: opacity 0.15s;
}

.file-item:hover .file-item-delete {
    opacity: 1;
}

.file-item-delete:hover {
    background: var(--danger-color);
    color: white;
}

.file-browser-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.file-browser-empty p {
    margin: 8px 0;
}

.file-browser-auth-required {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.file-browser-auth-required p {
    margin-bottom: 16px;
}

.btn-login-prompt {
    padding: 10px 20px;
}

.file-browser-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-start;
}

/* ===========================================
   Gradient Fill Editor
   =========================================== */

.fill-picker {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 8px 0;
}

.fill-label {
    color: var(--text-secondary);
    font-size: 12px;
    margin-bottom: 4px;
}

/* Fill Mode Toggle */
.fill-mode-toggle {
    display: flex;
    background: var(--bg-input);
    border-radius: 4px;
    padding: 2px;
    gap: 2px;
}

.fill-mode-btn {
    flex: 1;
    padding: 5px 8px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 11px;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.15s ease;
}

.fill-mode-btn:hover {
    color: var(--text-primary);
    background: var(--bg-hover);
}

.fill-mode-btn.active {
    background: var(--accent-color);
    color: white;
}

/* Fill Picker Content */
.fill-picker-content {
    margin-top: 4px;
}

/* Solid Fill UI */
.solid-fill-ui {
    display: flex;
    align-items: center;
}

.fill-color-input {
    width: 100%;
    height: 32px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-input);
    cursor: pointer;
}

.fill-color-input::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.fill-color-input::-webkit-color-swatch {
    border-radius: 2px;
    border: none;
}

/* Gradient UI */
.gradient-ui {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Gradient Stops Container */
.gradient-stops-container {
    position: relative;
    display: flex;
    justify-content: center;
}

.gradient-stops-track {
    position: relative;
    width: 120px;
    height: 120px;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    cursor: crosshair;
}

.gradient-stop-marker {
    position: absolute;
    width: 14px;
    height: 14px;
    border: 2px solid white;
    border-radius: 50%;
    cursor: pointer;
    transform: translate(-50%, -50%);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    z-index: 2;
}

.gradient-stop-marker:hover {
    transform: translate(-50%, -50%) scale(1.15);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.5);
}

.gradient-stop-marker.dragging {
    transform: translate(-50%, -50%) scale(1.25);
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.6);
    z-index: 3;
}

.gradient-marker-color-input {
    position: absolute;
    width: 1px;
    height: 1px;
    opacity: 0;
    pointer-events: none;
}

.gradient-direction-line {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 90%;
    height: 1px;
    background: rgba(255, 255, 255, 0.5);
    transform-origin: center center;
    margin-left: -45%;
    pointer-events: none;
    z-index: 1;
}

/* Gradient Stop Controls */
.gradient-stop-controls {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Angle Controls (Linear Gradient) */
.gradient-angle-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gradient-angle-label {
    color: var(--text-secondary);
    font-size: 11px;
    min-width: 36px;
}

.gradient-angle-input {
    width: 60px;
    padding: 4px 8px;
    background: var(--bg-input);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-size: 12px;
}

.gradient-angle-input:focus {
    outline: none;
    border-color: var(--accent-color);
}

.gradient-angle-suffix {
    color: var(--text-secondary);
    font-size: 12px;
}

/* Radius Controls (Radial Gradient) */
.gradient-radius-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.gradient-radius-label {
    color: var(--text-secondary);
    font-size: 11px;
    min-width: 30px;
}

.gradient-radius-input {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--bg-input);
    border-radius: 2px;
    cursor: pointer;
}

.gradient-radius-input::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
}

.gradient-radius-input::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    border: none;
    cursor: pointer;
}

/* ===========================================
   Floating UI Overlay System
   =========================================== */

/* Overlay container (click-through) */
.ui-overlays {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 100;
}

/* Semi-transparent panel style */
.overlay-panel {
    background: rgba(45, 45, 45, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(64, 64, 64, 0.8);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* Toolbar overlay */
.toolbar-overlay {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: auto;
    transition: all 0.3s ease;
}

/* Layers panel overlay */
.layers-overlay {
    position: absolute;
    top: 16px;
    left: 16px;
    pointer-events: auto;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.layers-overlay.minimized {
    transform: translateX(-100%);
    opacity: 0;
    pointer-events: none;
}

.layers-overlay .panel-left {
    background: rgba(45, 45, 45, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(64, 64, 64, 0.8);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    border-right: none;
}

.layers-overlay .panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Minimize button (in panel header) */
.panel-minimize-btn {
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 20px;
    line-height: 1;
    padding: 0;
    transition: color 0.15s;
}

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

/* Expand button (top-left corner when minimized) */
.layers-expand-btn {
    position: fixed;
    top: calc(var(--header-height) + 16px);
    left: 16px;
    width: 48px;
    height: 48px;
    background: rgba(45, 45, 45, 0.95);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(64, 64, 64, 0.8);
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    cursor: pointer;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s;
    z-index: 100;
    pointer-events: auto;
}

.layers-expand-btn:hover {
    background: var(--bg-hover);
    color: var(--accent-color);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
}

/* Quick actions overlay */
.quick-actions-overlay {
    position: absolute;
    bottom: 16px;
    right: 16px;
    pointer-events: auto;
}

.quick-actions-overlay .zoom-controls {
    background: rgba(45, 45, 45, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    border: 1px solid rgba(64, 64, 64, 0.8);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    padding: 8px 12px;
    margin: 0;
    border-left: none;
}

/* Tools Palette */
.tools-palette {
    display: flex;
    gap: 4px;
    padding: 8px;
    animation: fadeInScale 0.3s ease;
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.tool-btn {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tool-btn:hover {
    background: var(--bg-hover);
}

.tool-btn.active {
    background: var(--bg-hover);
}

.tool-btn svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-muted);
}

.tool-btn:hover svg {
    stroke: var(--text-primary);
}

.tool-btn.active svg {
    stroke: var(--accent-color);
}

/* Tool Context Panel */
.tool-context {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    animation: fadeInScale 0.3s ease;
}

.tool-context-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.tool-context-icon svg {
    width: 20px;
    height: 20px;
    stroke: var(--accent-color);
}

.tool-tabs {
    display: flex;
    gap: 4px;
    border-left: 1px solid rgba(64, 64, 64, 0.8);
    padding-left: 8px;
    transition: width 0.3s ease;
}

.tool-tab {
    padding: 8px 16px;
    border-radius: 6px;
    background: transparent;
    border: none;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.15s;
    animation: slideInTab 0.2s ease;
    animation-fill-mode: backwards;
}

.tool-tab:nth-child(1) { animation-delay: 0.05s; }
.tool-tab:nth-child(2) { animation-delay: 0.08s; }
.tool-tab:nth-child(3) { animation-delay: 0.11s; }
.tool-tab:nth-child(4) { animation-delay: 0.14s; }
.tool-tab:nth-child(5) { animation-delay: 0.17s; }
.tool-tab:nth-child(6) { animation-delay: 0.20s; }
.tool-tab:nth-child(7) { animation-delay: 0.23s; }
.tool-tab:nth-child(8) { animation-delay: 0.26s; }

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


.tool-tab:hover {
    background: rgba(64, 64, 64, 0.5);
    color: var(--text-primary);
}

.tool-tab.active {
    background: rgba(64, 64, 64, 0.5);
    color: var(--accent-color);
}

/* Property Window */
.property-window {
    position: fixed;
    top: calc(var(--header-height) + 72px);
    right: 16px;
    width: 320px;
    max-height: 500px;
    z-index: 150;
    animation: slideIn 0.2s ease-out;
    pointer-events: auto;
}

.property-window-header {
    padding: 12px 16px;
    border-bottom: 1px solid rgba(64, 64, 64, 0.8);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.property-window-header h3 {
    font-size: 14px;
    font-weight: 600;
    margin: 0;
    color: var(--text-primary);
}

.property-window-close {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 24px;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.15s;
}

.property-window-close:hover {
    color: var(--text-primary);
}

.property-window-content {
    padding: 16px;
    overflow-y: auto;
    max-height: 450px;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Point Tool Window - Specialized styling */
.point-tool-window {
    /* Use same base styles as property-window */
    border-left: 2px solid var(--accent-color);
}

.point-tool-window .property-window-header h3 {
    color: var(--accent-color);
    font-size: 13px;
}

.property-label {
    font-size: 12px;
    color: var(--text-secondary);
    min-width: 60px;
}

/* ===========================================
   Command Palette
   =========================================== */

.command-palette-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    padding-top: 80px;
    z-index: 1000;
}

.command-palette-overlay.open {
    display: flex;
}

.command-palette {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 500px;
    max-height: 400px;
    display: flex;
    flex-direction: column;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    overflow: hidden;
}

.command-palette-input-wrapper {
    padding: 12px;
    border-bottom: 1px solid var(--border-color);
}

.command-palette-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 14px;
    outline: none;
}

.command-palette-input:focus {
    border-color: var(--accent-color);
}

.command-palette-input::placeholder {
    color: var(--text-muted);
}

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

.command-palette-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 12px;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.1s;
}

.command-palette-item:hover {
    background: var(--bg-hover);
}

.command-palette-item.selected {
    background: var(--bg-selected);
}

.command-palette-label {
    color: var(--text-primary);
    font-size: 13px;
}

.command-palette-label mark {
    background: var(--accent-color);
    color: white;
    border-radius: 2px;
    padding: 0 2px;
}

.command-palette-shortcut {
    color: var(--text-muted);
    font-size: 11px;
    font-family: monospace;
    background: var(--bg-input);
    padding: 2px 6px;
    border-radius: 3px;
    border: 1px solid var(--border-color);
}

.command-palette-empty {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
}