/* ==========================================================================
   Custom Product Designer - Main Stylesheet
   Mobile-First Architecture inspired by Lumise
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables / Theme
   -------------------------------------------------------------------------- */
:root {
    /* Primary Colors (Lumise-inspired teal) */
    --primary-color: #3fc7ba;
    --primary-hover: #35b0a4;
    --primary-light: #e8f8f6;

    /* Secondary Colors */
    --secondary-color: #EE6C4D;
    --secondary-hover: #d55a3d;

    /* Neutral Colors */
    --bg-color: #f3f5f5;
    --bg-dark: #ebeced;
    --surface-color: #ffffff;
    --border-color: #e0e0e0;
    --border-light: #f0f0f0;

    /* Dark Theme (for sidebars like Lumise) */
    --dark-bg: #272c33;
    --dark-surface: #3f4652;
    --dark-border: rgba(255, 255, 255, 0.1);
    --dark-text: rgba(255, 255, 255, 0.85);
    --dark-text-muted: rgba(255, 255, 255, 0.5);

    /* Text Colors */
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-muted: #999999;
    --text-inverse: #ffffff;

    /* State Colors */
    --success-color: #27ae60;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --info-color: #3498db;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;

    /* Layout - Mobile First */
    --header-height: 54px;
    --toolbar-height: 44px;
    --bottom-nav-height: 56px;
    --sidebar-width: 280px;
    --sidebar-collapsed-width: 70px;
    --right-sidebar-width: 260px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    overflow: hidden;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -webkit-overflow-scrolling: auto;
    user-select: none;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: var(--bg-color);
}

/* --------------------------------------------------------------------------
   App Container
   -------------------------------------------------------------------------- */
#designer-app {
    display: flex;
    flex-direction: column;
    height: 100vh;
    height: 100dvh; /* Dynamic viewport height for mobile */
    overflow: hidden;
    position: relative;
}

/* --------------------------------------------------------------------------
   Header - Mobile First
   -------------------------------------------------------------------------- */
#designer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--spacing-sm);
    background: var(--primary-color);
    color: var(--text-inverse);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    flex-shrink: 0;
}

.header-left,
.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.header-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    flex: 1;
    min-width: 0;
}

/* Hide some header elements on mobile */
.header-left .separator,
.header-left [data-action="save"],
.header-left [data-action="load"] {
    display: none;
}

.product-selector-container {
    display: none;
}

.product-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

#product-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-inverse);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 150px;
}

#product-price {
    display: none;
}

.separator {
    width: 1px;
    height: 24px;
    background: rgba(255, 255, 255, 0.3);
    margin: 0 var(--spacing-xs);
}

/* Header buttons - mobile optimized */
#designer-header .btn-icon {
    color: var(--text-inverse);
    background: transparent;
}

#designer-header .btn-icon:hover {
    background: rgba(255, 255, 255, 0.15);
}

/* Hide cart button text on mobile */
#designer-header .btn.primary {
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.2);
}

#designer-header .btn.primary span {
    display: none;
}

#designer-header .btn.primary i {
    margin: 0;
}

/* --------------------------------------------------------------------------
   Buttons - Base Styles
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn.primary {
    background: var(--primary-color);
    color: var(--text-inverse);
}

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

.btn.secondary {
    background: var(--bg-dark);
    color: var(--text-primary);
}

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

.btn.danger {
    background: var(--danger-color);
    color: var(--text-inverse);
}

.btn.danger:hover {
    background: #c0392b;
}

.btn.small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 12px;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.btn-icon:hover,
.btn-icon:active {
    background: var(--bg-dark);
    color: var(--text-primary);
}

.btn-icon:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-icon.small {
    width: 32px;
    height: 32px;
    font-size: 12px;
}

.btn-icon.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   Dropdown Menu
   -------------------------------------------------------------------------- */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    min-width: 200px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    padding: var(--spacing-xs) 0;
    margin-top: var(--spacing-xs);
}

.dropdown.open .dropdown-menu {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    width: 100%;
    padding: 12px var(--spacing-md);
    font-size: 14px;
    color: var(--text-primary);
    background: transparent;
    border: none;
    cursor: pointer;
    text-align: left;
    transition: background var(--transition-fast);
}

.dropdown-item:hover,
.dropdown-item:active {
    background: var(--bg-dark);
}

.dropdown-item i {
    width: 20px;
    color: var(--text-secondary);
}

.dropdown-divider {
    height: 1px;
    margin: var(--spacing-xs) 0;
    background: var(--border-color);
}

/* --------------------------------------------------------------------------
   Context Toolbar - Hidden on Mobile (tools in bottom bar)
   -------------------------------------------------------------------------- */
#context-toolbar {
    display: none;
    align-items: center;
    height: var(--toolbar-height);
    padding: 0 var(--spacing-md);
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    flex-shrink: 0;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    white-space: nowrap;
}

.toolbar-label {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-right: var(--spacing-xs);
}

.btn-tool {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 13px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.btn-tool:hover,
.btn-tool:active {
    background: var(--bg-dark);
    border-color: var(--primary-color);
}

.btn-tool.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tool-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

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

.tool-group select,
.tool-group input[type="number"] {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 13px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
}

.tool-group select {
    min-width: 100px;
}

.tool-group input[type="number"] {
    width: 60px;
}

.tool-group input[type="color"] {
    width: 32px;
    height: 28px;
    padding: 2px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
}

.tool-group input[type="range"] {
    width: 80px;
}

/* --------------------------------------------------------------------------
   Main Layout - Mobile First
   -------------------------------------------------------------------------- */
#designer-main {
    display: flex;
    flex: 1;
    overflow: hidden;
    position: relative;
}

/* --------------------------------------------------------------------------
   Left Sidebar - Mobile: Hidden, shown via bottom nav
   -------------------------------------------------------------------------- */
#left-sidebar {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    width: 100%;
    height: calc(100% - var(--header-height) - var(--bottom-nav-height));
    background: var(--surface-color);
    z-index: 500;
    flex-direction: column;
    transform: translateY(-100%);
    transition: transform var(--transition-normal);
}

#left-sidebar.open {
    display: flex;
    transform: translateY(0);
}

/* Sidebar close button - mobile only */
.sidebar-close {
    display: flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.5);
    border: none;
    border-radius: var(--radius-full);
    color: var(--text-inverse);
    font-size: 20px;
    cursor: pointer;
    z-index: 10;
}

.sidebar-tabs {
    display: none; /* Hidden on mobile - tabs are in bottom nav */
}

.sidebar-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--surface-color);
}

/* --------------------------------------------------------------------------
   Tab Panels
   -------------------------------------------------------------------------- */
.tab-panel {
    display: none;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.tab-panel.active {
    display: flex;
}

.panel-header {
    padding: var(--spacing-md);
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
}

.panel-header h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.panel-header input[type="search"] {
    width: 100%;
    padding: 12px var(--spacing-md);
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
}

.panel-header input[type="search"]::placeholder {
    color: var(--text-muted);
}

.panel-header input[type="search"]:focus {
    outline: none;
    border-color: var(--primary-color);
}

.panel-body {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    background: var(--surface-color);
}

/* --------------------------------------------------------------------------
   Item Grids (Templates, Cliparts, Uploads)
   -------------------------------------------------------------------------- */
.item-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.grid-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
    background: var(--surface-color);
}

.grid-item:hover,
.grid-item:active {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.item-thumb {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
}

.item-thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.item-thumb i {
    font-size: 24px;
    color: var(--text-muted);
}

.grid-item span {
    font-size: 12px;
    color: var(--text-secondary);
    text-align: center;
}

/* --------------------------------------------------------------------------
   Text Panel
   -------------------------------------------------------------------------- */
.text-input-group {
    margin-bottom: var(--spacing-lg);
}

.text-input-group textarea {
    width: 100%;
    height: 100px;
    padding: var(--spacing-md);
    font-size: 16px; /* Prevent zoom on iOS */
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
    resize: vertical;
    margin-bottom: var(--spacing-sm);
}

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

.text-input-group .btn {
    width: 100%;
    padding: 14px;
    font-size: 16px;
}

.text-presets h4 {
    font-size: 13px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.preset-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.text-preset {
    display: block;
    width: 100%;
    padding: 14px var(--spacing-md);
    text-align: left;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.text-preset:hover,
.text-preset:active {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

/* --------------------------------------------------------------------------
   Upload Zone
   -------------------------------------------------------------------------- */
.upload-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    text-align: center;
    margin-bottom: var(--spacing-md);
    transition: all var(--transition-fast);
    min-height: 150px;
    background: var(--bg-color);
}

.upload-zone:active,
.upload-zone.drag-over {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.upload-zone i {
    font-size: 40px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.upload-zone p {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.upload-zone span {
    color: var(--text-muted);
    font-size: 12px;
    margin-bottom: var(--spacing-sm);
}

.upload-zone .btn {
    padding: 12px 24px;
}

/* --------------------------------------------------------------------------
   Layers Panel
   -------------------------------------------------------------------------- */
.layer-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.layers-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.layer-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 12px var(--spacing-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.layer-item.selected {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.layer-item.locked {
    opacity: 0.6;
}

.layer-thumb {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-sm);
    background: var(--bg-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    color: var(--text-muted);
    overflow: hidden;
    flex-shrink: 0;
}

.layer-thumb img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

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

.layer-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.layer-actions-inline {
    display: flex;
    gap: var(--spacing-xs);
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
}

.empty-state i {
    font-size: 40px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--text-muted);
}

/* --------------------------------------------------------------------------
   Value Added Services (VAS) Panel
   -------------------------------------------------------------------------- */
.vas-services-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.vas-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    text-align: center;
    color: var(--text-muted);
}

.vas-loading p {
    margin: 0;
    font-size: 14px;
}

.vas-service-item {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.vas-service-item.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 1px var(--primary-color);
}

.vas-service-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    cursor: pointer;
    background: var(--surface-color);
    transition: background var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.vas-service-header:hover {
    background: var(--bg-color);
}

.vas-service-header:active {
    background: var(--bg-color);
}

/* VAS Checkbox Toggle */
.vas-checkbox {
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    background: var(--surface-color);
}

.vas-checkbox i {
    font-size: 12px;
    color: white;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.vas-service-item.active .vas-checkbox {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.vas-service-item.active .vas-checkbox i {
    opacity: 1;
}

.vas-service-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.vas-service-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.vas-service-title i {
    color: var(--primary-color);
    font-size: 16px;
}

.vas-service-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.vas-service-price {
    font-size: 13px;
    font-weight: 500;
    color: var(--secondary-color);
}

.vas-service-info input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.vas-service-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.vas-service-price {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    white-space: nowrap;
}

.vas-service-body {
    display: none;
    padding: 0 var(--spacing-md) var(--spacing-md);
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
}

.vas-service-item.active .vas-service-body {
    display: block;
}

.vas-service-desc {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin: 0 0 var(--spacing-sm) 0;
}

.vas-no-sizes-warning {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: #fff3cd;
    border: 1px solid #ffc107;
    border-radius: var(--radius-sm);
    color: #856404;
    font-size: 12px;
}

.vas-no-sizes-warning i {
    color: #ffc107;
}

/* --------------------------------------------------------------------------
   Canvas Area - Mobile First
   -------------------------------------------------------------------------- */
#canvas-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-color);
    overflow: hidden;
    position: relative;
}

/* Product Controls (Views, Colors, Sizes) */
#product-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    flex-shrink: 0;
}

#stage-tabs {
    display: flex;
    gap: var(--spacing-xs);
}

.stage-tab {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.stage-tab:active {
    background: var(--bg-color);
}

.stage-tab.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--text-inverse);
}

/* Color Selector */
#color-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

#color-selector .color-label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    display: none;
}

#color-swatches {
    display: flex;
    gap: 6px;
}

.color-swatch {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    -webkit-tap-highlight-color: transparent;
}

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

.color-swatch.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-light);
}

.color-swatch.active::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 10px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.color-swatch.active.light-color::after {
    color: var(--text-primary);
    text-shadow: none;
}

/* Size Quantities (Bulk Order) - Hidden on mobile */
#size-quantities {
    display: none;
}

#size-qty-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.size-qty-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.size-qty-item.has-qty {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.size-qty-name {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 28px;
}

.size-qty-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.size-qty-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-secondary);
    font-size: 12px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.size-qty-btn:hover {
    background: var(--bg-dark);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.size-qty-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.size-qty-value {
    font-size: 13px;
    font-weight: 600;
    min-width: 20px;
    text-align: center;
    color: var(--text-primary);
}

.size-qty-upcharge {
    font-size: 10px;
    color: var(--secondary-color);
    margin-left: 2px;
}

/* --------------------------------------------------------------------------
   Order Tab Panel Styles (Light Theme)
   -------------------------------------------------------------------------- */
.order-section {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.order-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
}

.order-section-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
}

/* Order Color Swatches */
.order-color-swatches {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: var(--spacing-sm);
}

.order-color-swatch {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
}

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

.order-color-swatch.active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px var(--primary-color);
}

.order-color-swatch.active::after {
    content: '\f00c';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 14px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

.order-color-swatch.active.light-color::after {
    color: var(--text-primary);
    text-shadow: none;
}

.order-color-name {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 500;
}

/* Order Size Quantities Grid */
.order-sizes-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.order-size-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-color);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
}

.order-size-row.has-qty {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.order-size-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.order-size-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    min-width: 40px;
}

.order-size-upcharge {
    font-size: 11px;
    color: var(--secondary-color);
}

.order-size-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.order-qty-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-secondary);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.order-qty-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.order-qty-btn:disabled:hover {
    background: var(--surface-color);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.order-qty-value {
    font-size: 16px;
    font-weight: 600;
    min-width: 30px;
    text-align: center;
    color: var(--text-primary);
}

.order-total-qty {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-sm);
    border-top: 1px dashed var(--border-color);
    font-size: 13px;
    color: var(--text-muted);
}

#order-total-qty-value {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 16px;
}

/* Order Summary */
.order-summary-lines {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

.order-summary-line {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-secondary);
}

.order-summary-line.size-line {
    padding-left: var(--spacing-lg);
}

.order-summary-line.color-header {
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--spacing-sm);
}

.order-summary-line.color-header:first-child {
    margin-top: 0;
}

.order-summary-line.vas-line {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px dashed var(--border-color);
}

.color-dot {
    display: inline-block;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: var(--spacing-xs);
    vertical-align: middle;
    border: 1px solid var(--border-color);
}

.order-summary-total {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--spacing-md);
    border-top: 2px solid var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

#order-summary-total {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

/* Canvas Container */
#canvas-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    position: relative;
    overflow: hidden;
}

#canvas-wrapper {
    position: relative;
    background: var(--surface-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-sm);
    transform-origin: center center;
    transition: transform 0.1s ease-out;
}

#design-canvas {
    display: block;
    max-width: 100%;
    height: auto !important;
}

/* Canvas Loading Overlay */
#canvas-loading-overlay {
    position: absolute;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: var(--radius-sm);
}

#canvas-loading-overlay p {
    margin: var(--spacing-md) 0 0;
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.canvas-loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: canvas-spin 0.8s linear infinite;
}

@keyframes canvas-spin {
    to { transform: rotate(360deg); }
}

/* Dimension Display */
#dimension-display {
    position: absolute;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.8);
    color: var(--text-inverse);
    font-size: 12px;
    font-weight: 500;
    border-radius: var(--radius-sm);
    pointer-events: none;
    z-index: 100;
}

#dimension-display.hidden {
    display: none;
}

/* Snap Guides */
.snap-guide {
    position: absolute;
    background: var(--primary-color);
    pointer-events: none;
    z-index: 50;
}

.snap-guide.vertical {
    width: 1px;
    top: 0;
    bottom: 0;
}

.snap-guide.horizontal {
    height: 1px;
    left: 0;
    right: 0;
}

.snap-guide.hidden {
    display: none;
}

/* Zoom Controls - Positioned above bottom nav on mobile */
#zoom-controls {
    position: absolute;
    bottom: calc(var(--bottom-nav-height) + var(--spacing-md));
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--surface-color);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-md);
    z-index: 100;
}

#zoom-level {
    font-size: 12px;
    font-weight: 500;
    min-width: 45px;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Right Sidebar (Properties) - Mobile: Bottom Sheet
   -------------------------------------------------------------------------- */
#right-sidebar {
    display: none;
    position: fixed;
    bottom: var(--bottom-nav-height);
    left: 0;
    right: 0;
    max-height: 50vh;
    background: var(--surface-color);
    border-top-left-radius: var(--radius-lg);
    border-top-right-radius: var(--radius-lg);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.15);
    z-index: 400;
    flex-direction: column;
    transform: translateY(100%);
    transition: transform var(--transition-normal);
}

#right-sidebar.open {
    display: flex;
    transform: translateY(0);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    padding-top: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    position: relative;
}

/* Drag handle for bottom sheet */
.sidebar-header::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 4px;
    background: var(--border-color);
    border-radius: var(--radius-full);
}

.sidebar-header h3 {
    font-size: 16px;
    font-weight: 600;
}

#right-sidebar .sidebar-content {
    flex: 1;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
}

.properties-panel {
    padding: var(--spacing-md);
}

.properties-panel.hidden {
    display: none;
}

.property-group {
    margin-bottom: var(--spacing-lg);
}

.property-group h4 {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
}

.property-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.property-row label {
    font-size: 13px;
    color: var(--text-secondary);
    min-width: 50px;
}

.property-row input[type="number"],
.property-row input[type="text"] {
    flex: 1;
    padding: 10px var(--spacing-sm);
    font-size: 16px; /* Prevent zoom on iOS */
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.property-row input[type="range"] {
    flex: 1;
}

.property-row input[type="checkbox"] {
    width: 20px;
    height: 20px;
    margin-right: var(--spacing-xs);
}

.property-row .unit {
    font-size: 12px;
    color: var(--text-muted);
    min-width: 20px;
}

.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.action-buttons .btn {
    flex: 1;
    padding: 12px;
}

/* --------------------------------------------------------------------------
   Right Sidebar - Image Tools & Adjustments
   -------------------------------------------------------------------------- */

/* Tool Buttons Grid */
.tool-buttons-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xs);
}

.properties-panel .tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
    gap: 4px;
}

.properties-panel .tool-btn i {
    font-size: 16px;
    color: var(--text-primary);
}

.properties-panel .tool-btn:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

.properties-panel .tool-btn:active {
    transform: scale(0.95);
}

.properties-panel .tool-btn.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.properties-panel .tool-btn.active i {
    color: var(--primary-color);
}

/* Adjustment Rows (Brightness, Contrast, Blur, Rotation, Opacity) */
.adjustment-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

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

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

.adjustment-row input[type="range"] {
    flex: 1;
    height: 4px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--border-color);
    border-radius: 2px;
    outline: none;
}

.adjustment-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 14px;
    height: 14px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.adjustment-row input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

.adjustment-row input[type="range"]::-moz-range-thumb {
    width: 14px;
    height: 14px;
    background: var(--primary-color);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

.adj-value {
    font-size: 11px;
    color: var(--text-muted);
    min-width: 30px;
    text-align: right;
    font-weight: 500;
}

/* Effects Row */
.effects-row {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.effect-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

.effect-select {
    flex: 1;
    padding: var(--spacing-sm);
    font-size: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--surface-color);
    color: var(--text-primary);
    cursor: pointer;
}

.reset-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    padding: var(--spacing-sm);
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 12px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* Size Inputs */
.size-inputs {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.size-field {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
}

.size-field label {
    font-size: 11px;
    font-weight: 600;
    color: var(--text-muted);
}

.size-field input[type="number"] {
    flex: 1;
    width: 50px;
    padding: var(--spacing-xs);
    font-size: 13px;
    border: none;
    background: transparent;
    color: var(--text-primary);
    text-align: center;
}

.size-field input[type="number"]:focus {
    outline: none;
}

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

.link-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

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

/* Image-only sections - hide when not image */
.property-group.image-only {
    display: none;
}

.properties-panel.image-selected .property-group.image-only {
    display: block;
}

/* Price Display */
#price-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--primary-light);
    border-top: 1px solid var(--border-color);
}

#price-display .label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
}

#price-display .price {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   Bottom Navigation Bar - Lumise Style (Mobile Only)
   -------------------------------------------------------------------------- */
#bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--bottom-nav-height);
    background: var(--dark-bg);
    display: flex;
    align-items: stretch;
    z-index: 1000;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
}

.bottom-nav-items {
    display: flex;
    flex: 1;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}

.bottom-nav-items::-webkit-scrollbar {
    display: none;
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 70px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: transparent;
    border: none;
    color: var(--dark-text-muted);
    font-size: 10px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.bottom-nav-item i {
    font-size: 20px;
    margin-bottom: 4px;
}

.bottom-nav-item:active {
    background: var(--dark-surface);
}

.bottom-nav-item.active {
    color: var(--primary-color);
    background: var(--dark-surface);
}

/* Quick action button (e.g., add to design) */
.bottom-nav-action {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    background: var(--primary-color);
    color: var(--text-inverse);
    border: none;
    cursor: pointer;
    font-size: 20px;
    -webkit-tap-highlight-color: transparent;
}

.bottom-nav-action:active {
    background: var(--primary-hover);
}

/* --------------------------------------------------------------------------
   Mobile Tool Panel (shows above bottom nav when tool active)
   -------------------------------------------------------------------------- */
#mobile-tool-panel {
    position: fixed;
    bottom: var(--bottom-nav-height);
    left: 0;
    right: 0;
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-sm) var(--spacing-md);
    display: none;
    z-index: 300;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

#mobile-tool-panel.open {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.mobile-tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    padding: var(--spacing-sm);
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 11px;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
}

.mobile-tool-btn i {
    font-size: 18px;
    margin-bottom: 4px;
}

.mobile-tool-btn:active {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

.mobile-tool-btn.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* --------------------------------------------------------------------------
   Utility Classes
   -------------------------------------------------------------------------- */
.hidden {
    display: none !important;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
}

.smooth-scroll {
    overflow-y: scroll;
    -webkit-overflow-scrolling: touch;
}

/* --------------------------------------------------------------------------
   Scrollbar Styling
   -------------------------------------------------------------------------- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-full);
}

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

/* Dark scrollbars for dark panels */
.panel-body::-webkit-scrollbar-thumb,
#left-sidebar ::-webkit-scrollbar-thumb {
    background: var(--dark-text-muted);
}

/* ==========================================================================
   TABLET BREAKPOINT (768px+)
   ========================================================================== */
@media (min-width: 768px) {
    :root {
        --bottom-nav-height: 0px;
    }

    /* Header - Show more elements */
    #designer-header {
        padding: 0 var(--spacing-md);
        background: var(--surface-color);
        color: var(--text-primary);
    }

    #designer-header .btn-icon {
        color: var(--text-secondary);
    }

    #designer-header .btn-icon:hover {
        background: var(--bg-dark);
        color: var(--text-primary);
    }

    .header-left .separator,
    .header-left [data-action="save"],
    .header-left [data-action="load"] {
        display: inline-flex;
    }

    .product-selector-container {
        display: flex;
    }

    .product-selector-container select {
        padding: 6px 12px;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-sm);
        font-size: 13px;
        background-color: var(--surface-color);
        cursor: pointer;
        min-width: 180px;
    }

    #product-name {
        font-size: 16px;
        color: var(--text-primary);
        max-width: none;
    }

    #product-price {
        display: inline;
        font-size: 14px;
        font-weight: 500;
        color: var(--primary-color);
    }

    #designer-header .btn.primary {
        padding: var(--spacing-sm) var(--spacing-md);
        background: var(--primary-color);
    }

    #designer-header .btn.primary span {
        display: inline;
    }

    /* Context Toolbar - Show on tablet+ */
    #context-toolbar {
        display: flex;
    }

    /* Left Sidebar - Collapsed vertical bar */
    #left-sidebar {
        display: flex;
        position: relative;
        top: auto;
        left: auto;
        width: var(--sidebar-collapsed-width);
        height: auto;
        transform: none;
        flex-shrink: 0;
        flex-direction: row;
        background: var(--dark-bg);
    }

    #left-sidebar.open {
        transform: none;
    }

    .sidebar-close {
        display: none;
    }

    .sidebar-tabs {
        display: flex;
        flex-direction: column;
        width: var(--sidebar-collapsed-width);
        padding: var(--spacing-sm);
        background: var(--dark-bg);
        border-right: 1px solid var(--dark-border);
    }

    .tab-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 50px;
        height: 50px;
        margin-bottom: var(--spacing-xs);
        border: none;
        border-radius: var(--radius-sm);
        background: transparent;
        color: var(--dark-text-muted);
        font-size: 18px;
        cursor: pointer;
        transition: all var(--transition-fast);
    }

    .tab-btn:hover {
        background: var(--dark-surface);
        color: var(--dark-text);
    }

    .tab-btn.active {
        background: var(--primary-color);
        color: var(--text-inverse);
    }

    .sidebar-content {
        position: absolute;
        left: var(--sidebar-collapsed-width);
        top: 0;
        width: 300px;
        height: 100%;
        background: var(--surface-color);
        display: none;
        border-right: 1px solid var(--border-color);
    }

    #left-sidebar.panel-open .sidebar-content {
        display: flex;
    }

    /* Canvas Container */
    #canvas-container {
        padding: var(--spacing-lg);
        padding-bottom: var(--spacing-lg);
    }

    /* Zoom Controls */
    #zoom-controls {
        bottom: var(--spacing-md);
    }

    /* Right Sidebar - Fixed panel */
    #right-sidebar {
        display: none;
        position: relative;
        bottom: auto;
        left: auto;
        right: auto;
        width: var(--right-sidebar-width);
        max-height: none;
        height: auto;
        border-radius: 0;
        border-left: 1px solid var(--border-color);
        box-shadow: none;
        transform: none;
        flex-shrink: 0;
    }

    #right-sidebar.open {
        display: flex;
    }

    .sidebar-header::before {
        display: none;
    }

    .sidebar-header {
        padding-top: var(--spacing-md);
    }

    /* Hide bottom nav on tablet+ */
    #bottom-nav {
        display: none;
    }

    #mobile-tool-panel {
        display: none !important;
    }

    /* Size quantities (bulk order) */
    #size-quantities {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
    }

    #size-quantities .size-label {
        font-size: 13px;
        font-weight: 500;
        color: var(--text-secondary);
    }

    #color-selector .color-label {
        display: inline;
    }
}

/* ==========================================================================
   DESKTOP BREAKPOINT (1024px+)
   ========================================================================== */
@media (min-width: 1024px) {
    /* Left Sidebar - Show expanded panel */
    #left-sidebar {
        width: var(--sidebar-width);
    }

    .sidebar-tabs {
        width: var(--sidebar-collapsed-width);
    }

    .sidebar-content {
        position: relative;
        left: auto;
        width: calc(var(--sidebar-width) - var(--sidebar-collapsed-width));
        display: flex;
    }

    #left-sidebar.panel-open .sidebar-content {
        display: flex;
    }

    /* Right Sidebar - Always visible when object selected */
    #right-sidebar {
        display: flex;
    }
}

/* ==========================================================================
   LARGE DESKTOP (1280px+)
   ========================================================================== */
@media (min-width: 1280px) {
    :root {
        --sidebar-width: 320px;
        --right-sidebar-width: 280px;
    }

    .item-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ==========================================================================
   Landscape Mobile Adjustments
   ========================================================================== */
@media (max-width: 767px) and (orientation: landscape) {
    :root {
        --header-height: 44px;
        --bottom-nav-height: 48px;
    }

    #canvas-container {
        padding: var(--spacing-xs);
    }

    .bottom-nav-item {
        min-width: 60px;
        font-size: 9px;
    }

    .bottom-nav-item i {
        font-size: 16px;
    }
}

/* ==========================================================================
   Safe Area Insets (for notched devices)
   ========================================================================== */
@supports (padding-bottom: env(safe-area-inset-bottom)) {
    #bottom-nav {
        padding-bottom: env(safe-area-inset-bottom);
        height: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    }

    #canvas-container {
        padding-bottom: calc(var(--bottom-nav-height) + var(--spacing-md) + env(safe-area-inset-bottom));
    }

    #zoom-controls {
        bottom: calc(var(--bottom-nav-height) + var(--spacing-md) + env(safe-area-inset-bottom));
    }

    #right-sidebar {
        bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    }

    #mobile-tool-panel {
        bottom: calc(var(--bottom-nav-height) + env(safe-area-inset-bottom));
    }
}

/* ==========================================================================
   Touch Feedback Enhancements
   ========================================================================== */
@media (hover: none) and (pointer: coarse) {
    .btn:active,
    .btn-icon:active,
    .btn-tool:active,
    .tab-btn:active,
    .stage-tab:active,
    .grid-item:active,
    .layer-item:active,
    .text-preset:active,
    .bottom-nav-item:active,
    .mobile-tool-btn:active,
    .dropdown-item:active {
        transform: scale(0.97);
    }

    /* Larger touch targets */
    .btn-icon {
        width: 44px;
        height: 44px;
    }

    .tab-btn {
        width: 54px;
        height: 54px;
    }

    .color-swatch {
        width: 32px;
        height: 32px;
    }
}

/* ==========================================================================
   Saved Designs - Modal & UI Styles
   ========================================================================== */

/* Modal Base */
.cpd-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.cpd-modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.cpd-modal-content {
    position: relative;
    background: var(--surface-color);
    border-radius: 16px;
    padding: 32px;
    max-width: 420px;
    width: 100%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: cpd-modal-in 0.3s ease;
}

@keyframes cpd-modal-in {
    from {
        opacity: 0;
        transform: scale(0.95) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.cpd-modal-close {
    position: absolute;
    top: 12px;
    right: 12px;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.cpd-modal-close:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.cpd-modal-icon {
    color: var(--primary-color);
    margin-bottom: 16px;
}

.cpd-modal-icon svg {
    width: 48px;
    height: 48px;
}

.cpd-modal h2 {
    font-size: 22px;
    font-weight: 600;
    margin: 0 0 12px;
    color: var(--text-primary);
}

.cpd-modal p {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0 0 24px;
    line-height: 1.5;
}

.cpd-modal-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.cpd-modal-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 16px !important;
    margin-bottom: 0 !important;
}

/* Buttons */
.cpd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    min-width: 120px;
}

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

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

.cpd-btn-secondary {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.cpd-btn-secondary:hover {
    background: var(--bg-dark);
}

/* Name Input Modal */
.cpd-design-name-input {
    width: 100%;
    padding: 14px 16px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 20px;
    outline: none;
    transition: border-color 0.2s;
}

.cpd-design-name-input:focus {
    border-color: var(--primary-color);
}

/* Load Modal */
.cpd-load-modal-content {
    max-width: 600px;
    text-align: left;
}

.cpd-load-modal-content h2 {
    text-align: center;
    margin-bottom: 20px;
}

.cpd-load-designs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
    max-height: 400px;
    overflow-y: auto;
    padding: 4px;
}

.cpd-load-design-card {
    background: var(--bg-color);
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.cpd-load-design-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.cpd-load-design-thumb {
    aspect-ratio: 1;
    background: var(--bg-dark);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cpd-load-design-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.cpd-load-design-placeholder {
    width: 48px;
    height: 48px;
    background: var(--border-color);
    border-radius: 8px;
}

.cpd-load-design-info {
    padding: 12px;
}

.cpd-load-design-info h4 {
    font-size: 14px;
    font-weight: 600;
    margin: 0 0 4px;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cpd-load-design-info p {
    font-size: 12px;
    color: var(--text-muted);
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Toast Notifications */
.cpd-toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--dark-bg);
    color: white;
    padding: 14px 24px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
    z-index: 10001;
    opacity: 0;
    transition: all 0.3s ease;
}

.cpd-toast.active {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.cpd-toast-success {
    background: var(--success-color);
}

.cpd-toast-error {
    background: var(--danger-color);
}

.cpd-toast-info {
    background: var(--info-color);
}

/* Saving Indicator */
.cpd-saving-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    background: var(--surface-color);
    padding: 12px 20px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: var(--shadow-lg);
    z-index: 10001;
    opacity: 0;
    transform: translateY(-20px);
    pointer-events: none;
    transition: all 0.3s ease;
}

.cpd-saving-indicator.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.cpd-saving-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: cpd-spin 0.8s linear infinite;
}

@keyframes cpd-spin {
    to { transform: rotate(360deg); }
}

/* Mobile responsiveness for modals */
@media (max-width: 480px) {
    .cpd-modal-content {
        padding: 24px;
        margin: 16px;
    }

    .cpd-modal-actions {
        flex-direction: column;
    }

    .cpd-btn {
        width: 100%;
    }

    .cpd-load-designs-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .cpd-toast {
        left: 16px;
        right: 16px;
        transform: translateX(0) translateY(100px);
    }

    .cpd-toast.active {
        transform: translateX(0) translateY(0);
    }
}