/* =========================================
   Mandala Studio - Standalone Application
   Supports Light and Dark Themes
   ========================================= */

/* ========================================
   DARK THEME (Default)
   ======================================== */
:root,
[data-theme="dark"] {
    /* Adobe-like Dark Theme Colors */
    --app-bg: #1e1e1e;           /* Main background */
    --panel-bg: #252526;         /* Panels/Sidebars */
    --header-bg: #3c3c3c;        /* Top bar */
    --canvas-bg: #181818;        /* Canvas area background */
    
    --text-color: #cccccc;       /* Primary text */
    --text-muted: #858585;       /* Secondary text */
    --text-hover: #ffffff;       /* Hover text */
    
    --accent-color: #0e639c;     /* Selection/Active state */
    --accent-hover: #1177bb;
    --accent-text: #ffffff;
    
    --border-color: #3e3e42;     /* Borders */
    --input-bg: #3c3c3c;         /* Inputs */
    --input-border: #3e3e42;
    
    --danger-color: #f14c4c;
    
    /* Canvas specific */
    --canvas-stroke-color: #ffffff;  /* Default stroke color for new strokes */
    --guide-color: rgba(102, 102, 136, 0.3);
    --guide-color-strong: rgba(102, 102, 136, 0.5);
    --symmetry-line-color: #00ffff;              /* Cyan symmetry lines */
    --bisecting-line-color: #ffffff;             /* White bisecting lines */
    --circle-guide-color: #ffffff;               /* White circles */
    --center-dot-color: #ff6b6b;
    
    /* Button states */
    --btn-bg: #3c3c3c;
    --btn-hover-bg: #4a4a4a;
    --btn-active-bg: #0e639c;
    
    /* Scrollbar */
    --scrollbar-track: rgba(255, 255, 255, 0.05);
    --scrollbar-thumb: rgba(255, 255, 255, 0.15);
    --scrollbar-thumb-hover: rgba(255, 255, 255, 0.25);
    
    /* Layout Dimensions */
    --header-height: 36px;
    --toolbar-width: 42px;
    --sidebar-width: 240px;
    --sidebar-collapsed-width: 44px;
    --statusbar-height: 22px;
    
    /* Theme toggle icon */
    --theme-icon-sun: block;
    --theme-icon-moon: none;
}

/* ========================================
   LIGHT THEME
   ======================================== */
[data-theme="light"] {
    /* Light Theme Colors */
    --app-bg: #f5f5f5;           /* Main background */
    --panel-bg: #ffffff;         /* Panels/Sidebars */
    --header-bg: #e8e8e8;        /* Top bar */
    --canvas-bg: #ffffff;        /* Canvas area background */
    
    --text-color: #333333;       /* Primary text */
    --text-muted: #666666;       /* Secondary text */
    --text-hover: #000000;       /* Hover text */
    
    --accent-color: #0066cc;     /* Selection/Active state */
    --accent-hover: #0077dd;
    --accent-text: #ffffff;
    
    --border-color: #d4d4d4;     /* Borders */
    --input-bg: #ffffff;         /* Inputs */
    --input-border: #cccccc;
    
    --danger-color: #dc3545;
    
    /* Canvas specific */
    --canvas-stroke-color: #333333;  /* Default stroke color for new strokes */
    --guide-color: rgba(0, 100, 180, 0.3);       /* Blue guides visible on white */
    --guide-color-strong: rgba(0, 100, 180, 0.5);
    --symmetry-line-color: #0088cc;              /* Blue symmetry lines */
    --bisecting-line-color: #666666;             /* Dark gray bisecting lines */
    --circle-guide-color: #888888;               /* Medium gray circles */
    --center-dot-color: #e74c3c;
    
    /* Button states */
    --btn-bg: #e0e0e0;
    --btn-hover-bg: #d0d0d0;
    --btn-active-bg: #0066cc;
    
    /* Scrollbar */
    --scrollbar-track: rgba(0, 0, 0, 0.05);
    --scrollbar-thumb: rgba(0, 0, 0, 0.15);
    --scrollbar-thumb-hover: rgba(0, 0, 0, 0.25);
    
    /* Theme toggle icon */
    --theme-icon-sun: none;
    --theme-icon-moon: block;
}

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

/* Global touch behavior for all interactive elements */
button, 
input, 
select, 
textarea,
a,
[role="button"] {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

html, body {
    height: 100%;
    width: 100%;
    overflow: hidden;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 13px;
    background: var(--app-bg);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased;
    /* Prevent all touch zoom/pan gestures on iPad */
    touch-action: manipulation;
    -webkit-touch-callout: none;
    -ms-touch-action: manipulation;
}

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

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* =========================================
   App Container - Fixed Full Screen
   ========================================= */
.mandala-studio-app {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    background: var(--app-bg);
    overflow: hidden;
    /* Prevent double-tap zoom and pinch zoom on iOS */
    touch-action: manipulation;
    -webkit-user-select: none;
    user-select: none;
}

/* =========================================
   Top Bar
   ========================================= */
.studio-topbar {
    height: var(--header-height);
    min-height: var(--header-height);
    max-height: var(--header-height);
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    flex-shrink: 0;
    z-index: 100;
    /* Prevent double-tap zoom on header buttons */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.topbar-left, .topbar-right {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* Theme Toggle Button */
#btn-theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    background: var(--btn-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.15s;
}

#btn-theme-toggle:hover {
    background: var(--btn-hover-bg);
    border-color: var(--accent-color);
}

#btn-theme-toggle:active {
    background: var(--btn-active-bg);
    transform: scale(0.95);
}

#btn-theme-toggle i {
    font-size: 14px;
}

/* Show/hide sun and moon icons based on theme */
.theme-icon-sun {
    display: var(--theme-icon-sun);
    color: #fbbf24;
}

.theme-icon-moon {
    display: var(--theme-icon-moon);
    color: #60a5fa;
}

/* Quick Brush Controls - Center of Topbar */
.topbar-center {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 1;
}

.quick-brush-controls {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 12px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.quick-color-picker {
    display: flex;
    align-items: center;
    gap: 6px;
}

.quick-color-picker input[type="color"] {
    width: 28px;
    height: 28px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
    background: none;
    -webkit-appearance: none;
}

.quick-color-picker input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.quick-color-picker input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 50%;
}

.quick-color-swatches {
    display: flex;
    align-items: center;
    gap: 3px;
}

.quick-swatch {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid transparent;
    transition: transform 0.15s, border-color 0.15s;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

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

.quick-swatch:active {
    transform: scale(1.2);
}

.quick-swatch.active {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(108, 92, 231, 0.3);
}

.quick-size-control {
    display: flex;
    align-items: center;
    gap: 6px;
}

.quick-size-icon {
    font-size: 8px;
    color: var(--text-muted);
    transition: font-size 0.15s;
}

.quick-size-control input[type="range"] {
    width: 80px;
    height: 4px;
    -webkit-appearance: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
    cursor: pointer;
}

.quick-size-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    transition: transform 0.15s;
}

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

.quick-size-value {
    font-size: 11px;
    color: var(--text-color);
    min-width: 20px;
    text-align: center;
    font-weight: 600;
}

.topbar-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-hover);
    padding: 0 8px;
}

.topbar-brand i {
    color: #00b4d8;
    font-size: 16px;
}

.separator {
    width: 1px;
    height: 18px;
    background: var(--border-color);
    margin: 0 6px;
}

.tool-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.icon-btn {
    width: 26px;
    height: 26px;
    background: transparent;
    border: none;
    color: var(--text-color);
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: background 0.1s;
    /* Prevent double-tap zoom on buttons */
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.icon-btn:hover:not(:disabled) {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
}

.icon-btn:disabled {
    opacity: 0.4;
    cursor: default;
}

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

.zoom-level {
    font-size: 11px;
    min-width: 40px;
    text-align: center;
    color: var(--text-muted);
}

.primary-btn {
    height: 26px;
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0 12px;
    border-radius: 3px;
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: background 0.1s;
}

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

/* Dropdown */
.dropdown-wrapper {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background-color: var(--panel-bg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.5);
    z-index: 1000;
    min-width: 200px;
    padding: 5px 0;
    margin-top: 5px;
    border-radius: 4px;
}

.dropdown-section-header {
    padding: 6px 15px 4px;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    border-top: 1px solid var(--border-color);
    margin-top: 4px;
}

.dropdown-section-header:first-child {
    border-top: none;
    margin-top: 0;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    text-align: left;
    padding: 8px 15px;
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    font-size: 13px;
    transition: background-color 0.1s;
}

.dropdown-item i {
    width: 16px;
    text-align: center;
    color: var(--text-muted);
}

.dropdown-item:hover {
    background-color: var(--accent-color);
    color: white;
}

.dropdown-item:hover i {
    color: white;
}

/* Export item row with copy button */
.export-item-row {
    display: flex;
    align-items: stretch;
}

.export-item-row .dropdown-item {
    flex: 1;
    border-radius: 0;
}

.export-item-row .copy-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    padding: 0;
    background: none;
    border: none;
    border-left: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.export-item-row .copy-btn:hover {
    background-color: var(--accent-color);
    color: white;
}

.export-item-row .copy-btn.copied {
    background-color: var(--success-color, #27ae60);
    color: white;
}

.export-item-row .copy-btn i {
    font-size: 12px;
}

/* Export dropdown toggle option */
.dropdown-toggle-item {
    padding: 8px 15px;
}

.dropdown-toggle-item .toggle-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-color);
}

.dropdown-toggle-item input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.dropdown-toggle-item .toggle-label:hover {
    color: var(--accent-color);
}

/* Export DPI dropdown */
.dropdown-toggle-item.export-dpi-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.dropdown-toggle-item .dpi-label {
    color: var(--text-muted);
    font-size: 12px;
}

.dropdown-toggle-item .dpi-select {
    background: var(--input-bg);
    color: var(--text-color);
    border: 1px solid var(--input-border);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 12px;
}

.dropdown-toggle-item .dpi-select:focus {
    border-color: var(--accent-color);
    outline: none;
}

/* =========================================
   Main Area - Flex Row
   ========================================= */
.studio-main {
    flex: 1;
    display: flex;
    min-height: 0;
    max-height: calc(100vh - var(--header-height) - var(--statusbar-height));
    overflow: hidden;
}

/* =========================================
   Left Toolbar
   ========================================= */
.studio-toolbar {
    width: var(--toolbar-width);
    min-width: var(--toolbar-width);
    background: var(--panel-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 6px 0;
    gap: 2px;
    flex-shrink: 0;
}

.tool-item {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 3px;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.1s;
    position: relative;
    font-size: 14px;
}

.tool-item:hover {
    color: var(--text-hover);
    background-color: rgba(255,255,255,0.08);
}

.tool-item.active {
    color: var(--accent-text);
    background-color: var(--accent-color);
}

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

/* =========================================
   Canvas Area
   ========================================= */
.studio-canvas {
    flex: 1;
    background: var(--canvas-bg);
    position: relative;
    overflow: hidden;
    min-width: 0;
}

.canvas-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

#mandala-canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
    /* Prevent browser touch gestures on the canvas */
    touch-action: none;
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}

/* =========================================
   Right Sidebar
   ========================================= */
.studio-sidebar {
    width: var(--sidebar-width);
    min-width: var(--sidebar-width);
    max-width: var(--sidebar-width);
    background: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
    flex-grow: 0;
    height: 100%;
    max-height: 100%;
}

.studio-sidebar::-webkit-scrollbar {
    width: 6px;
}

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

.studio-sidebar::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 3px;
}

/* =========================================
   Collapsible Sidebar - Adobe Style Icon Bar
   For iPads and users who want more canvas space
   ========================================= */

/* Sidebar Toggle Button */
.sidebar-collapse-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 28px;
    background: var(--header-bg);
    border: none;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-muted);
    cursor: pointer;
    transition: background 0.15s, color 0.15s;
    flex-shrink: 0;
    gap: 6px;
    font-size: 10px;
    position: sticky;
    top: 0;
    z-index: 10;
}

.sidebar-collapse-toggle::before {
    content: 'Collapse';
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.sidebar-collapse-toggle:hover {
    background: var(--btn-hover-bg);
    color: var(--text-hover);
}

.sidebar-collapse-toggle i {
    font-size: 10px;
    transition: transform 0.2s;
}

/* Icon Strip - Visible when sidebar is collapsed */
.sidebar-icon-strip {
    display: none;
    flex-direction: column;
    width: var(--sidebar-collapsed-width);
    background: var(--panel-bg);
    border-left: 1px solid var(--border-color);
    overflow-y: auto;
    overflow-x: hidden;
    flex-shrink: 0;
}

.sidebar-icon-strip::-webkit-scrollbar {
    width: 0;
}

.sidebar-icon-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 40px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    position: relative;
}

.sidebar-icon-btn:hover {
    background: var(--btn-hover-bg);
    color: var(--text-hover);
}

.sidebar-icon-btn.active {
    color: var(--accent-color);
    background: rgba(14, 99, 156, 0.15);
}

.sidebar-icon-btn.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 20px;
    background: var(--accent-color);
    border-radius: 0 2px 2px 0;
}

.sidebar-icon-btn i {
    font-size: 14px;
}

.sidebar-icon-btn .icon-tooltip {
    position: absolute;
    left: calc(100% + 8px);
    background: var(--header-bg);
    color: var(--text-color);
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 11px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.15s, visibility 0.15s;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0,0,0,0.3);
}

/* Only show tooltips on hover with mouse (not touch) */
@media (hover: hover) and (pointer: fine) {
    .sidebar-icon-btn:hover .icon-tooltip {
        opacity: 1;
        visibility: visible;
    }
}

/* Explicitly hide tooltips on touch devices */
@media (hover: none), (pointer: coarse) {
    .sidebar-icon-btn .icon-tooltip {
        display: none !important;
    }
}

/* Expand button at bottom of icon strip */
.sidebar-expand-btn {
    margin-top: auto;
    border-top: 1px solid var(--border-color);
}

/* Collapsed Sidebar State */
.studio-sidebar.collapsed {
    display: none;
}

.studio-layout.sidebar-collapsed .sidebar-icon-strip {
    display: flex;
}

.studio-layout.sidebar-collapsed .studio-sidebar {
    display: none;
}

/* Flyout Panel - When clicking icon in collapsed mode */
.sidebar-flyout {
    position: fixed;
    top: var(--header-height);
    right: var(--sidebar-collapsed-width);
    width: 260px;
    max-width: calc(100vw - var(--sidebar-collapsed-width) - var(--toolbar-width) - 20px);
    max-height: calc(100vh - var(--header-height) - var(--statusbar-height));
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px 0 0 4px;
    box-shadow: -4px 0 20px rgba(0,0,0,0.3);
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 550;
    opacity: 0;
    visibility: hidden;
    transform: translateX(10px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
}

.sidebar-flyout.visible {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.sidebar-flyout::-webkit-scrollbar {
    width: 6px;
}

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

.sidebar-flyout::-webkit-scrollbar-thumb {
    background: #555;
    border-radius: 3px;
}

.sidebar-flyout .panel {
    border-bottom: none;
}

.sidebar-flyout .panel-body {
    display: block !important;
}

.sidebar-flyout .panel-header {
    display: none;
}

/* Flyout header */
.sidebar-flyout-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    background: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 10;
}

.sidebar-flyout-header span {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-color);
}

.sidebar-flyout-close {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.15s;
}

.sidebar-flyout-close:hover {
    background: var(--btn-hover-bg);
    color: var(--text-hover);
}

/* Flyout backdrop for mobile */
.sidebar-flyout-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.3);
    z-index: 540;
}

.sidebar-flyout-backdrop.visible {
    display: block;
}

/* Panel Container */
.panel {
    border-bottom: 1px solid var(--border-color);
}

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

.panel.collapsed .panel-toggle {
    transform: rotate(-90deg);
}

/* Panel Header */
.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    height: 28px;
    background: rgba(255,255,255,0.02);
    cursor: pointer;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    color: var(--text-muted);
    transition: background 0.1s;
    user-select: none;
}

.panel-header span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.panel-header span i {
    font-size: 9px;
    width: 12px;
    text-align: center;
}

.panel-toggle {
    font-size: 8px;
    transition: transform 0.15s;
}

.panel-header:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-hover);
}

/* Panel Body */
.panel-body {
    padding: 8px 10px 10px;
    overflow: hidden;
}

/* Control Row - Inline slider with label */
.ctrl-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
}

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

/* Control Hint Text */
.ctrl-hint {
    font-size: 10px;
    color: var(--text-muted);
    margin: 2px 0 8px 0;
    padding-left: 2px;
    opacity: 0.7;
    line-height: 1.3;
}

.ctrl-row label {
    font-size: 11px;
    color: var(--text-muted);
    width: 50px;
    flex-shrink: 0;
    white-space: nowrap;
}

.ctrl-row input[type="range"] {
    flex: 1;
    min-width: 60px;
    height: 3px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
    margin: 0;
}

.ctrl-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: #d4d4d4;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--panel-bg);
    transition: all 0.1s;
}

.ctrl-row input[type="range"]::-webkit-slider-thumb:hover {
    background: #fff;
    transform: scale(1.1);
}

.ctrl-row .val {
    font-size: 11px;
    color: var(--text-color);
    min-width: 32px;
    width: 32px;
    text-align: right;
    flex-shrink: 0;
}

/* Color Row */
.ctrl-row.color-row input[type="color"] {
    flex: 1;
    height: 20px;
    border: 1px solid var(--border-color);
    border-radius: 2px;
    padding: 0;
    cursor: pointer;
    -webkit-appearance: none;
    background: none;
}

.ctrl-row.color-row input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.ctrl-row.color-row input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 1px;
}

/* Color Grid */
.color-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2px;
    margin-top: 4px;
}

.swatch {
    aspect-ratio: 1;
    border-radius: 2px;
    cursor: pointer;
    border: 1px solid rgba(255,255,255,0.1);
    transition: transform 0.1s, border-color 0.1s;
}

.swatch:hover {
    transform: scale(1.1);
    border-color: rgba(255,255,255,0.5);
    z-index: 1;
}

.swatch.active {
    border-color: #fff;
    box-shadow: 0 0 0 1px var(--accent-color);
}

/* Button Grid */
.btn-grid {
    display: grid;
    gap: 2px;
}

.btn-grid.cols-5 {
    grid-template-columns: repeat(5, 1fr);
}

.grid-btn {
    aspect-ratio: 1;
    background: rgba(255,255,255,0.04);
    border: 1px solid transparent;
    color: var(--text-muted);
    border-radius: 2px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    transition: all 0.1s;
    padding: 0;
}

.grid-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
}

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

/* Pattern Brush Mode Button - Highlighted */
.grid-btn.pattern-brush-btn {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
    border-color: #9b59b6;
}

.grid-btn.pattern-brush-btn:hover {
    background: linear-gradient(135deg, #a569bd 0%, #9b59b6 100%);
}

.grid-btn.pattern-brush-btn.active {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
    box-shadow: 0 0 8px rgba(155, 89, 182, 0.5);
}

/* Pattern Brush Settings Section */
.pattern-brush-settings {
    background: rgba(155, 89, 182, 0.1);
    border: 1px solid rgba(155, 89, 182, 0.3);
    border-radius: 6px;
    padding: 10px;
    margin-top: 8px;
}

.pattern-brush-settings .section-header {
    color: #9b59b6;
    font-weight: 600;
    margin-bottom: 8px;
}

.pattern-brush-settings .section-header i {
    margin-right: 6px;
}

.pattern-brush-settings .ctrl-row {
    margin-bottom: 6px;
}

.pattern-brush-settings .toggle-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-muted);
    cursor: pointer;
}

.pattern-brush-settings .toggle-label input[type="checkbox"] {
    accent-color: #9b59b6;
}

.pattern-brush-settings .btn-primary {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
    border: none;
    margin-top: 0;
}

.pattern-brush-settings .btn-primary:hover {
    background: linear-gradient(135deg, #a569bd 0%, #9b59b6 100%);
}

/* Preset Row */
.preset-row {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2px;
    margin-bottom: 6px;
}

.preset-btn {
    padding: 4px 0;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 2px;
    cursor: pointer;
    font-size: 10px;
    font-weight: 600;
    transition: all 0.1s;
}

.preset-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
}

.preset-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

/* =========================================
   Compact Section Layout
   ========================================= */
.compact-section {
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.04);
}

.compact-section:last-of-type {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 5px;
}

.section-header span:first-child {
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.section-value {
    font-size: 10px;
    color: var(--accent-color);
    font-weight: 600;
    background: rgba(14, 99, 156, 0.2);
    padding: 1px 6px;
    border-radius: 3px;
}

/* 3-Column Mode Grid with Labels */
.btn-grid.cols-3 {
    grid-template-columns: repeat(3, 1fr);
}

.btn-grid.cols-3 .grid-btn {
    aspect-ratio: unset;
    flex-direction: column;
    padding: 6px 4px;
    gap: 2px;
}

.btn-grid.cols-3 .grid-btn i {
    font-size: 12px;
}

.btn-grid.cols-3 .grid-btn span {
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Inline Presets Row */
.inline-presets {
    display: flex;
    align-items: center;
    gap: 3px;
}

.mini-preset {
    width: 24px;
    height: 20px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 2px;
    cursor: pointer;
    font-size: 9px;
    font-weight: 600;
    transition: all 0.1s;
    flex-shrink: 0;
}

.mini-preset:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
}

.mini-preset.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.inline-slider {
    flex: 1;
    min-width: 40px;
    height: 3px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
    margin-left: 4px;
}

.inline-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    background: #d4d4d4;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--panel-bg);
}

.inline-slider::-webkit-slider-thumb:hover {
    background: #fff;
}

/* Mini Toggle Button */
.mini-toggle {
    width: 22px;
    height: 18px;
    background: rgba(255,255,255,0.08);
    border: none;
    border-radius: 3px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.1s;
}

.mini-toggle:hover {
    background: rgba(255,255,255,0.15);
    color: var(--text-hover);
}

.mini-toggle.active {
    background: var(--accent-color);
    color: white;
}

/* Guide Toggle Buttons Row */
.guide-toggles {
    display: flex;
    gap: 4px;
}

.guide-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 6px 4px;
    background: rgba(255,255,255,0.04);
    border: 1px solid transparent;
    border-radius: 3px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.1s;
}

.guide-btn i {
    font-size: 12px;
}

.guide-btn span {
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.guide-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
}

.guide-btn.active {
    background: rgba(14, 99, 156, 0.3);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Expandable Section */
.expandable-section {
    margin-top: 6px;
}

.expand-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 5px 8px;
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.05);
    border-radius: 3px;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.1s;
}

.expand-trigger:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-color);
}

.expand-trigger i {
    font-size: 8px;
    transition: transform 0.15s;
}

.expandable-section.expanded .expand-trigger i {
    transform: rotate(180deg);
}

.expand-content {
    display: none;
    padding: 8px 0 0 0;
}

.expandable-section.expanded .expand-content {
    display: block;
}

/* Mini Control Row */
.mini-ctrl {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 5px;
}

.mini-ctrl:last-child {
    margin-bottom: 0;
}

.mini-ctrl label {
    font-size: 10px;
    color: var(--text-muted);
    width: 55px;
    flex-shrink: 0;
}

.mini-ctrl input[type="range"] {
    flex: 1;
    min-width: 50px;
    height: 3px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
}

.mini-ctrl input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 10px;
    height: 10px;
    background: #d4d4d4;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--panel-bg);
}

.mini-ctrl .val {
    font-size: 10px;
    color: var(--text-color);
    min-width: 24px;
    text-align: right;
    flex-shrink: 0;
}

/* Toggle Row */
.toggle-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 3px 0;
}

.toggle-row span {
    font-size: 10px;
    color: var(--text-color);
}

/* Mini Toggle Switch */
.switch {
    position: relative;
    display: inline-block;
    width: 24px;
    height: 12px;
    flex-shrink: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.switch .track {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #444;
    border-radius: 12px;
    transition: background 0.15s;
}

.switch .track::before {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    left: 2px;
    bottom: 2px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.15s;
}

.switch input:checked + .track {
    background: var(--accent-color);
}

.switch input:checked + .track::before {
    transform: translateX(12px);
}

/* Layer Section */
.layer-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 4px;
    margin-bottom: 4px;
    border-bottom: 1px solid var(--border-color);
}

.layer-hint {
    font-size: 9px;
    color: var(--text-muted);
    font-style: italic;
}

.layer-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 2px;
    font-size: 10px;
}

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

.layer-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.layer-item {
    display: flex;
    align-items: center;
    padding: 3px 4px;
    background: var(--input-bg);
    border-radius: 2px;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.15s, border-color 0.15s;
}

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

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

.layer-item.active .layer-name {
    color: var(--accent-text);
}

/* Make all icons visible on active (blue) layer */
.layer-item.active .drag-handle,
.layer-item.active .layer-visibility,
.layer-item.active .layer-lock,
.layer-item.active .layer-isolate,
.layer-item.active .layer-preview,
.layer-item.active .layer-isolate i {
    color: var(--accent-text) !important;
}

.layer-item.active .layer-preview {
    background: rgba(255, 255, 255, 0.2);
}

/* Drag & Drop styling */
.layer-item.dragging {
    opacity: 0.5;
    border: 1px dashed var(--accent-color);
}

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

.layer-item .drag-handle {
    cursor: grab;
    color: var(--text-muted);
    padding: 0 4px;
    font-size: 10px;
}

.layer-item .drag-handle:hover {
    color: var(--text-hover);
}

.layer-item .drag-handle:active {
    cursor: grabbing;
}

.layer-visibility, .layer-lock, .layer-isolate {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    font-size: 9px;
    width: 18px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.layer-isolate i {
    font-size: 10px;
}

.layer-visibility:hover, .layer-lock:hover, .layer-isolate:hover {
    color: var(--text-hover);
}

.layer-isolate.isolated {
    color: #ff6b35;
}

.layer-preview {
    width: 16px;
    height: 16px;
    background: var(--btn-bg);
    margin: 0 4px;
    border-radius: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 8px;
}

.layer-name {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-color);
    font-size: 10px;
    font-family: inherit;
    outline: none;
    min-width: 0;
}

/* Sub-layer visibility */
.layer-item .layer-visibility.hidden i {
    opacity: 0.4;
}

.sub-layer-list {
    padding-left: 12px;
}

.layer-item.sub-layer {
    padding: 2px 4px;
    font-size: 9px;
}

.layer-item.sub-layer.is-hidden {
    opacity: 0.5;
}

.layer-item.sub-layer .sublayer-visibility {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px;
    font-size: 9px;
    width: 18px;
    display: flex;
    justify-content: center;
}

.layer-item.sub-layer .sublayer-visibility:hover {
    color: var(--text-hover);
}

.layer-item.sub-layer .sublayer-visibility.off {
    color: var(--text-muted);
    opacity: 0.5;
}

/* Sub-layer specific styles */
.sublayer-preview {
    width: 16px;
    height: 16px;
    background: none;
    color: var(--text-muted);
}

.sublayer-name {
    flex: 1;
    color: var(--text-muted);
    font-size: 10px;
}

/* Layer actions (move up/down, delete) */
.layer-actions {
    display: flex;
    gap: 2px;
}

.layer-action-btn {
    width: 16px;
    height: 16px;
    border: none;
    background: none;
    cursor: pointer;
    color: var(--text-muted);
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
}

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

.layer-action-btn i {
    font-size: 8px;
}

.layer-action-btn.layer-delete:hover {
    color: var(--danger-color);
}

/* =========================================
   Status Bar - Fixed at Bottom
   ========================================= */
.studio-statusbar {
    height: var(--statusbar-height);
    min-height: var(--statusbar-height);
    max-height: var(--statusbar-height);
    background: #007acc;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 10px;
    font-size: 11px;
    color: white;
    flex-shrink: 0;
    z-index: 100;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

/* =========================================
   Loader
   ========================================= */
.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--app-bg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10000;
    transition: opacity 0.3s;
}

.app-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 0.8s linear infinite;
    margin-bottom: 12px;
}

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

.app-loader p {
    color: var(--text-muted);
    font-size: 13px;
}

/* =========================================
   MOBILE RESPONSIVE DESIGN
   Touch-friendly layout for phones & tablets
   ========================================= */

/* Default hide mobile-only elements on desktop */
.mobile-sidebar-toggle {
    display: none;
}

.mobile-sidebar-backdrop {
    display: none;
}

.mobile-zoom-hint {
    display: none;
}

/* Tablet Layout - Collapsible Sidebar */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 220px;
    }
    
    /* Hide icon strip by default on tablet - only show when collapsed */
    .sidebar-icon-strip {
        display: none;
    }
    
    /* Show icon strip only when sidebar is collapsed */
    .studio-layout.sidebar-collapsed .sidebar-icon-strip {
        display: flex;
    }
    
    /* Icon buttons slightly larger for touch */
    .sidebar-icon-btn {
        height: 44px;
    }
    
    .sidebar-icon-btn i {
        font-size: 16px;
    }
    
    /* Flyout panel adjustments for tablet */
    .sidebar-flyout {
        width: 280px;
        right: var(--sidebar-collapsed-width);
    }
    
    /* Show flyout backdrop on tablet for easier dismissal */
    .sidebar-flyout-backdrop.visible {
        display: block;
    }
}

/* Phone Landscape & Small Tablets */
@media (max-width: 768px) {
    :root {
        --header-height: 44px;
        --toolbar-width: 48px;
        --statusbar-height: 0px; /* Hide on mobile */
    }
    
    /* Hide status bar on mobile - not essential */
    .studio-statusbar {
        display: none;
    }
    
    /* Hide quick brush controls on mobile - use sidebar instead */
    .topbar-center {
        display: none;
    }
    
    /* Top bar adjustments for mobile */
    .studio-topbar {
        height: var(--header-height);
        min-height: var(--header-height);
        padding: 0 6px;
    }
    
    .topbar-brand span {
        display: none;
    }
    
    .topbar-brand {
        padding: 0 4px;
    }
    
    .separator {
        margin: 0 4px;
        height: 16px;
    }
    
    /* Slightly larger touch targets */
    .icon-btn {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    .primary-btn {
        height: 34px;
        padding: 0 10px;
        font-size: 12px;
    }
    
    /* Main layout - still side by side but thinner toolbar */
    .studio-main {
        max-height: calc(100vh - var(--header-height));
    }
    
    /* Left toolbar - touch-friendly sizes */
    .studio-toolbar {
        width: var(--toolbar-width);
        min-width: var(--toolbar-width);
        padding: 4px 0;
    }
    
    .tool-item {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    /* Sidebar - Slide-out drawer on mobile */
    .studio-sidebar {
        position: fixed;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        width: 280px;
        max-width: 85vw;
        z-index: 500;
        transform: translateX(100%);
        transition: transform 0.25s ease-out;
        box-shadow: -4px 0 20px rgba(0,0,0,0.5);
    }
    
    /* Hide collapse button on mobile - use FAB instead */
    .sidebar-collapse-toggle {
        display: none;
    }
    
    /* Hide icon strip and flyout on mobile - use drawer pattern */
    .sidebar-icon-strip,
    .sidebar-flyout,
    .sidebar-flyout-backdrop {
        display: none !important;
    }
    
    .studio-sidebar.mobile-open {
        transform: translateX(0);
    }
    
    /* Sidebar toggle button - shows on mobile */
    .mobile-sidebar-toggle {
        display: flex !important;
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 50px;
        height: 50px;
        background: var(--accent-color);
        border: none;
        border-radius: 50%;
        color: white;
        font-size: 18px;
        cursor: pointer;
        z-index: 400;
        box-shadow: 0 4px 15px rgba(0,0,0,0.4);
        align-items: center;
        justify-content: center;
        transition: transform 0.2s, background 0.2s;
    }
    
    .mobile-sidebar-toggle:active {
        transform: scale(0.9);
    }
    
    .mobile-sidebar-toggle.open {
        background: var(--danger-color);
    }
    
    /* Sidebar backdrop overlay */
    .mobile-sidebar-backdrop {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 450;
    }
    
    .mobile-sidebar-backdrop.visible {
        display: block;
    }
    
    /* Canvas takes full width */
    .studio-canvas {
        flex: 1;
        min-width: 0;
    }
    
    /* Panel adjustments for touch */
    .panel-header {
        height: 40px;
        padding: 0 12px;
        font-size: 12px;
    }
    
    .panel-body {
        padding: 10px 12px 14px;
    }
    
    /* Larger touch targets for controls */
    .ctrl-row input[type="range"]::-webkit-slider-thumb {
        width: 18px;
        height: 18px;
    }
    
    .grid-btn {
        min-height: 36px;
    }
    
    .swatch {
        min-width: 28px;
        min-height: 28px;
    }
    
    /* Dropdown adjustments */
    .dropdown-menu {
        min-width: 180px;
    }
    
    .dropdown-item {
        padding: 12px 15px;
    }
    
    /* Gallery modal adjustments */
    .gallery-content {
        width: 95%;
        max-height: 85vh;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: 10px;
    }
}

/* iPad Portrait & Landscape - show quick brush controls */
@media (min-width: 769px) and (max-width: 1024px) {
    .topbar-center {
        display: flex;
    }
    
    /* Simplify quick brush controls for tablet */
    .quick-brush-controls {
        padding: 4px 8px;
        gap: 6px;
    }
    
    .quick-color-swatches {
        display: none; /* Hide swatches, keep color picker */
    }
    
    .quick-size-control input[type="range"] {
        width: 60px;
    }
}

/* Phone Portrait - Compact Layout */
@media (max-width: 480px) {
    :root {
        --header-height: 50px;
    }
    
    /* Simpler top bar on small phones */
    .studio-topbar {
        padding: 0 4px;
    }
    
    .topbar-left .tool-group:not(:first-child) {
        display: none; /* Hide undo/redo to save space */
    }
    
    .zoom-controls {
        display: none; /* Use pinch zoom instead */
    }
    
    .icon-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
    
    .primary-btn span {
        display: none; /* Just show icon */
    }
    
    .primary-btn {
        padding: 0 12px;
    }
    
    /* Left toolbar - Bottom bar layout */
    .studio-main {
        flex-direction: column;
    }
    
    .studio-toolbar {
        order: 2; /* Move to bottom */
        width: 100%;
        min-width: 100%;
        height: 56px;
        min-height: 56px;
        flex-direction: row;
        border-right: none;
        border-top: 1px solid var(--border-color);
        padding: 0;
        justify-content: space-around;
        gap: 0;
    }
    
    .tool-item {
        width: 44px;
        height: 44px;
        font-size: 18px;
        border-radius: 6px;
    }
    
    .tool-separator {
        display: none;
    }
    
    /* Canvas area adjusts */
    .studio-canvas {
        order: 1;
        flex: 1;
        min-height: 0;
    }
    
    /* Sidebar adjustments */
    .studio-sidebar {
        width: 100%;
        max-width: 100%;
        top: 0;
        border-radius: 0;
    }
    
    .mobile-sidebar-toggle {
        bottom: 70px; /* Above the bottom toolbar */
        right: 15px;
        width: 46px;
        height: 46px;
    }
    
    .mobile-sidebar-backdrop {
        top: 0;
    }
    
    /* More compact panels on small phones */
    .pattern-category-header,
    .shape-category-header {
        font-size: 10px;
    }
    
    .patterns-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .shapes-grid {
        grid-template-columns: repeat(5, 1fr);
    }
    
    /* Gallery modal full screen on phones */
    .gallery-content {
        width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
    }
    
    .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* Toast notifications above bottom toolbar */
    .toast-notification {
        bottom: 130px;
    }
}

/* Pinch-to-zoom hint for mobile */
.mobile-zoom-hint {
    display: none;
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0,0,0,0.8);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 12px;
    z-index: 200;
    animation: fadeOut 3s ease-in-out forwards;
    pointer-events: none;
}

@keyframes fadeOut {
    0%, 80% { opacity: 1; }
    100% { opacity: 0; }
}

@media (max-width: 768px) {
    .mobile-zoom-hint {
        display: block;
    }
}

/* Mobile-specific touch feedback */
@media (hover: none) and (pointer: coarse) {
    /* Touch device specific styles */
    .tool-item:active {
        transform: scale(0.92);
        background: var(--accent-color);
    }
    
    .icon-btn:active:not(:disabled) {
        transform: scale(0.92);
        background: rgba(255,255,255,0.2);
    }
    
    .grid-btn:active {
        transform: scale(0.95);
    }
    
    .swatch:active {
        transform: scale(1.15);
    }
    
    .pattern-btn:active,
    .shape-btn:active {
        transform: scale(0.95);
    }
    
    /* Hide cursor-dependent UI */
    .studio-statusbar .status-item:last-child {
        display: none; /* Hide coordinates */
    }
    
    /* Larger touch targets for tools */
    .tool-item {
        min-width: 44px;
        min-height: 44px;
        padding: 12px;
    }
    
    .icon-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Larger swatches for easier color picking */
    .swatch {
        width: 28px;
        height: 28px;
    }
    
    /* Larger pattern/shape buttons */
    .pattern-btn,
    .shape-btn {
        min-width: 44px;
        min-height: 44px;
    }
    
    /* Easier slider interaction */
    input[type="range"] {
        height: 28px;
    }
    
    input[type="range"]::-webkit-slider-thumb {
        width: 24px;
        height: 24px;
    }
    
    input[type="range"]::-moz-range-thumb {
        width: 24px;
        height: 24px;
    }
    
    /* Increase touch targets */
    .layer-item {
        padding: 10px 8px;
        min-height: 44px;
    }
    
    .layer-visibility,
    .layer-lock {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
    
    /* Larger checkboxes/toggles */
    .toggle-row input[type="checkbox"] {
        width: 44px;
        height: 24px;
    }
    
    /* Easier panel header taps */
    .panel-header {
        min-height: 44px;
        padding: 10px 12px;
    }
    
    /* Pattern search on touch */
    .pattern-search-wrapper input {
        padding: 12px 40px 12px 36px;
        font-size: 16px; /* Prevents iOS zoom on focus */
    }
    
    .pattern-search-clear {
        width: 40px;
        height: 40px;
    }
}

/* =========================================
   Pattern Search
   ========================================= */

.pattern-search-wrapper {
    position: relative;
    margin-bottom: 12px;
}

.pattern-search-wrapper input {
    width: 100%;
    padding: 8px 32px 8px 30px;
    background: rgba(0,0,0,0.3);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 12px;
    transition: border-color 0.2s, background 0.2s;
}

.pattern-search-wrapper input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(0,0,0,0.4);
}

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

.pattern-search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 11px;
    pointer-events: none;
}

.pattern-search-clear {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, color 0.2s;
}

.pattern-search-clear:hover {
    color: var(--text-primary);
}

.pattern-search-wrapper input:not(:placeholder-shown) ~ .pattern-search-clear {
    opacity: 1;
    visibility: visible;
}

/* No results state */
.pattern-no-results {
    text-align: center;
    padding: 20px 10px;
    color: var(--text-muted);
    font-size: 12px;
}

.pattern-no-results i {
    display: block;
    font-size: 24px;
    margin-bottom: 8px;
    opacity: 0.5;
}

/* Search match highlighting */
.pattern-match-count {
    font-size: 10px;
    color: var(--text-muted);
    margin-bottom: 8px;
    padding: 4px 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 4px;
}

/* =========================================
   Pattern Buttons - Dynamic Pattern UI
   ========================================= */

/* Container for all patterns */
.patterns-container {
    max-height: 350px;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px;
}

.patterns-container::-webkit-scrollbar {
    width: 6px;
}

.patterns-container::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
}

.patterns-container::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 3px;
}

/* Loading state */
.loading-patterns {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 11px;
    gap: 8px;
}

/* Pattern category section */
.pattern-category {
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.pattern-category:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.pattern-category-header {
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.pattern-category-header i {
    color: var(--accent-color);
    font-size: 10px;
}

/* Pattern grid layout */
.patterns-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
}

/* Individual pattern button */
.pattern-btn {
    aspect-ratio: 1;
    background: rgba(255,255,255,0.04);
    border: 1px solid transparent;
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    padding: 0;
    position: relative;
    overflow: hidden;
}

.pattern-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
    transform: scale(1.05);
    z-index: 1;
}

.pattern-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(14, 99, 156, 0.3);
}

/* Solid fill button - special styling - PROMINENT with visual icon */
.pattern-btn.solid-fill-btn {
    grid-column: span 2;
    aspect-ratio: auto;
    min-height: 52px;
    background: rgba(255, 255, 255, 0.04);
    border: 2px solid var(--border-color);
    margin-bottom: 8px;
    transition: all 0.2s ease;
}

.pattern-btn.solid-fill-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
    transform: scale(1.01);
}

.pattern-btn.solid-fill-btn.active {
    background: rgba(108, 92, 231, 0.15);
    border-color: var(--accent-color);
    box-shadow: 0 0 8px rgba(108, 92, 231, 0.3);
}

/* Solid visual preview - gradient circle icon */
.pattern-preview.solid-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    background: transparent;
}

.solid-visual-icon {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-color) 0%, #a29bfe 100%);
    box-shadow: 0 2px 8px rgba(108, 92, 231, 0.4);
}

.pattern-btn.solid-fill-btn.active .solid-visual-icon {
    box-shadow: 0 0 12px rgba(108, 92, 231, 0.5);
}

.solid-visual-label {
    color: var(--text-muted);
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pattern-btn.solid-fill-btn.active .solid-visual-label {
    color: white;
}

/* ========== Brush Style Section ========== */
.brush-style-section {
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.brush-style-label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.brush-style-label i {
    font-size: 10px;
}

.brush-style-toggle {
    display: flex;
    gap: 8px;
}

.style-option {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 12px 8px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.style-option:hover {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.15);
    color: var(--text-color);
}

.style-option.active {
    background: rgba(108, 92, 231, 0.15);
    border-color: var(--accent-color);
    color: white;
}

.style-option-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Solid icon - filled circle */
.style-option-icon.solid-icon {
    background: linear-gradient(135deg, var(--accent-color) 0%, #a29bfe 100%);
    border-radius: 50%;
}

/* Pattern icon - grid pattern */
.style-option-icon.pattern-icon {
    background: 
        linear-gradient(45deg, var(--accent-color) 25%, transparent 25%),
        linear-gradient(-45deg, var(--accent-color) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--accent-color) 75%),
        linear-gradient(-45deg, transparent 75%, var(--accent-color) 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px -5px, -5px 0px;
    opacity: 0.7;
}

.style-option.active .style-option-icon.solid-icon {
    box-shadow: 0 0 12px rgba(108, 92, 231, 0.5);
}

.style-option.active .style-option-icon.pattern-icon {
    opacity: 1;
    box-shadow: 0 0 12px rgba(108, 92, 231, 0.5);
}

/* Pattern Mode Info - shows selected pattern */
.pattern-mode-info {
    display: none;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: linear-gradient(135deg, rgba(108, 92, 231, 0.1) 0%, rgba(155, 89, 182, 0.1) 100%);
    border: 1px solid rgba(108, 92, 231, 0.25);
    border-radius: 8px;
    margin-bottom: 12px;
}

.pattern-mode-info.visible {
    display: flex;
}

.pattern-mode-details {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
}

.pattern-mode-details i {
    font-size: 16px;
    color: var(--accent-color);
}

.pattern-mode-name {
    font-size: 11px;
    color: var(--accent-color);
    font-weight: 600;
}

.pattern-select-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    gap: 4px;
}

.pattern-select-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
}

.pattern-btn .pattern-preview {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.pattern-btn .pattern-preview i {
    font-size: 14px;
}

/* Pattern count badge */
.pattern-count-badge {
    background: var(--accent-color);
    color: white;
    font-size: 9px;
    padding: 1px 6px;
    border-radius: 10px;
    font-weight: 600;
}

/* Library section styles */
.library-section {
    margin-bottom: 12px;
}

.library-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Category count in header */
.category-count {
    font-weight: normal;
    color: var(--text-muted);
    opacity: 0.7;
    font-size: 8px;
    margin-left: 4px;
}

/* =========================================
   Shape Buttons - Dynamic Shape UI
   ========================================= */

/* Container for all shapes */
.shapes-container {
    max-height: 300px;
    overflow-y: auto;
    overflow-x: hidden;
    padding-right: 4px;
}

.shapes-container::-webkit-scrollbar {
    width: 6px;
}

.shapes-container::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.2);
    border-radius: 3px;
}

.shapes-container::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 3px;
}

/* Loading state for shapes */
.loading-shapes {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: var(--text-muted);
    font-size: 11px;
    gap: 8px;
}

/* Shape category section */
.shape-category {
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.shape-category:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.shape-category-header {
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.shape-category-header i {
    color: var(--accent-color);
    font-size: 10px;
}

/* Shape grid layout */
.shapes-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 4px;
}

/* Individual shape button */
.shape-btn {
    aspect-ratio: 1;
    background: rgba(255,255,255,0.04);
    border: 1px solid transparent;
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.15s ease;
    padding: 0;
    font-size: 14px;
}

.shape-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
    transform: scale(1.05);
    z-index: 1;
}

.shape-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(14, 99, 156, 0.3);
}

/* Shape count badge */
.shape-count-badge {
    background: var(--accent-color);
    color: white;
    font-size: 9px;
    padding: 1px 6px;
    border-radius: 10px;
    font-weight: 600;
}
/* ========================================
   Path Tools Panel
   ======================================== */
.path-tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
    margin-bottom: 8px;
}

.path-tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 6px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
    min-height: 54px;
}

.path-tool-btn i {
    font-size: 16px;
}

.path-tool-btn span {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    text-align: center;
    line-height: 1.2;
}

.path-tool-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--text-hover);
    border-color: rgba(255,255,255,0.2);
    transform: translateY(-1px);
}

.path-tool-btn:active {
    transform: translateY(0);
    background: rgba(255,255,255,0.15);
}

.path-tool-btn.active {
    background: rgba(14, 99, 156, 0.3);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.path-tool-btn.success {
    background: rgba(0, 184, 148, 0.2);
    border-color: #00b894;
    color: #00b894;
}

.path-tool-btn.warning {
    background: rgba(253, 203, 110, 0.2);
    border-color: #fdcb6e;
    color: #fdcb6e;
}

.path-tools-status {
    padding: 8px;
    background: rgba(0,0,0,0.2);
    border-radius: 4px;
    text-align: center;
    color: var(--text-muted);
    font-size: 11px;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.path-tools-status.info {
    background: rgba(14, 99, 156, 0.2);
    color: var(--accent-color);
}

.path-tools-status.success {
    background: rgba(0, 184, 148, 0.2);
    color: #00b894;
}

.path-tools-status.warning {
    background: rgba(253, 203, 110, 0.2);
    color: #fdcb6e;
}

/* Antenna selection zones */
.antenna-zone {
    transition: all 0.15s ease;
}

.antenna-zone.selected {
    animation: pulse-antenna 1s infinite;
}

@keyframes pulse-antenna {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

/* Antenna preview line */
.antenna-preview {
    animation: dash-move 0.5s linear infinite;
    stroke-dasharray: 6, 4;
}

/* =========================================
   Snap Indicator Styles
   Visual feedback for symmetry axis snapping
   ========================================= */

.snap-indicator {
    pointer-events: none;
    z-index: 10000;
}

.snap-indicator-outer {
    animation: snap-pulse 0.8s ease-in-out infinite;
}

.snap-indicator-inner {
    animation: snap-glow 0.8s ease-in-out infinite alternate;
}

.snap-indicator-pulse {
    animation: snap-ripple 1.2s ease-out infinite;
    transform-origin: center;
}

@keyframes snap-pulse {
    0%, 100% { 
        r: 12;
        opacity: 0.8;
    }
    50% { 
        r: 14;
        opacity: 1;
    }
}

@keyframes snap-glow {
    0% { opacity: 0.7; }
    100% { opacity: 1; }
}

@keyframes snap-ripple {
    0% {
        r: 8;
        opacity: 0.6;
    }
    100% {
        r: 20;
        opacity: 0;
    }
}

/* Center Snap Indicator - shows when snapping to canvas center */
.center-snap-indicator {
    pointer-events: none;
    z-index: 10000;
    animation: center-snap-appear 0.3s ease-out;
}

.center-snap-indicator line {
    animation: center-snap-pulse 0.5s ease-in-out infinite alternate;
}

.center-snap-indicator circle {
    animation: center-snap-glow 0.5s ease-in-out infinite alternate;
}

@keyframes center-snap-appear {
    0% {
        opacity: 0;
        transform: scale(0.5);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes center-snap-pulse {
    0% { stroke-opacity: 0.6; }
    100% { stroke-opacity: 1; }
}

@keyframes center-snap-glow {
    0% { 
        fill: #00ff88;
        r: 4;
    }
    100% { 
        fill: #88ffbb;
        r: 5;
    }
}

/* =========================================
   Pattern Gallery Modal
   Save/Load patterns from localStorage
   ========================================= */

.gallery-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gallery-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.gallery-content {
    position: relative;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    background: var(--panel-bg);
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: gallery-appear 0.2s ease-out;
}

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

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

.gallery-header h2 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-hover);
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

.gallery-header h2 i {
    color: var(--accent-color);
}

.gallery-close {
    width: 32px;
    height: 32px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    transition: all 0.15s;
}

.gallery-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
}

.gallery-body {
    flex: 1;
    padding: 16px 20px;
    overflow-y: auto;
}

.gallery-body::-webkit-scrollbar {
    width: 8px;
}

.gallery-body::-webkit-scrollbar-track {
    background: rgba(0, 0, 0, 0.2);
}

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

.gallery-toolbar {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.gallery-btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.15s;
}

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

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

.gallery-btn.danger {
    background: rgba(241, 76, 76, 0.2);
    color: var(--danger-color);
}

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

.gallery-count {
    margin-left: auto;
    font-size: 12px;
    color: var(--text-muted);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 16px;
}

.gallery-empty {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    color: var(--text-muted);
    text-align: center;
}

.gallery-empty i {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.4;
}

.gallery-empty p {
    font-size: 16px;
    margin-bottom: 8px;
    color: var(--text-color);
}

.gallery-empty span {
    font-size: 12px;
    opacity: 0.7;
}

/* Gallery Pattern Item */
.gallery-item {
    position: relative;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.15s;
}

.gallery-item:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.gallery-item-thumb {
    width: 100%;
    aspect-ratio: 1;
    background: var(--canvas-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.gallery-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #2d3436, #636e72);
}

.gallery-placeholder i {
    font-size: 32px;
    color: #3498db;
    opacity: 0.6;
}

.gallery-item-info {
    padding: 10px;
    border-top: 1px solid var(--border-color);
}

.gallery-item-name {
    font-size: 12px;
    color: var(--text-color);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 4px;
}

.gallery-item-date {
    font-size: 10px;
    color: var(--text-muted);
}

.gallery-item-actions {
    position: absolute;
    top: 8px;
    right: 8px;
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.15s;
}

.gallery-item:hover .gallery-item-actions {
    opacity: 1;
}

.gallery-item-btn {
    width: 28px;
    height: 28px;
    background: rgba(0, 0, 0, 0.7);
    border: none;
    border-radius: 4px;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    transition: all 0.15s;
}

.gallery-item-btn:hover {
    background: var(--accent-color);
    color: white;
}

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

/* Save Notification Toast */
.save-notification {
    position: fixed;
    top: 60px;
    right: 20px;
    background: var(--accent-color);
    color: white;
    padding: 12px 20px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 10px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
    z-index: 10001;
    animation: notification-slide 0.3s ease-out;
}

@keyframes notification-slide {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.save-notification.fade-out {
    animation: notification-fade 0.3s ease-out forwards;
}

@keyframes notification-fade {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(30px);
    }
}

/* =========================================
   Pattern Brush Library Styles
   ========================================= */

/* Button Row for Pattern Brush Actions */
.btn-row {
    display: flex;
    gap: 4px;
    margin-bottom: 8px;
}

.btn-row .btn-sm {
    flex: 1;
    padding: 6px 8px;
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.btn-row .btn-sm i {
    font-size: 10px;
}

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

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

.btn-accent {
    background: #2ea043;
    color: white;
    border: none;
}

.btn-accent:hover {
    background: #3fb950;
}

.btn-danger {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    padding: 6px 10px !important;
    flex: 0 !important;
}

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

.section-header .mini-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 2px 6px;
    font-size: 11px;
    border-radius: 3px;
}

.section-header .mini-btn:hover {
    background: var(--accent-color);
    color: white;
}

/* Pattern Library Grid */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    max-height: 200px;
    overflow-y: auto;
    padding: 4px;
    background: var(--app-bg);
    border-radius: 4px;
    margin-top: 4px;
}

.pattern-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-muted);
    font-size: 11px;
    padding: 20px 10px;
    line-height: 1.5;
}

.pattern-item {
    position: relative;
    aspect-ratio: 2 / 1;
    background: #3a3a3a;
    border: 1px solid #555;
    border-radius: 4px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.15s ease;
    min-height: 50px;
}

.pattern-item:hover {
    border-color: var(--accent-color);
    transform: scale(1.02);
}

.pattern-item.selected {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px var(--accent-color);
}

.pattern-item img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    background: #2d2d2d;
}

.pattern-item .no-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    font-size: 9px;
    color: var(--text-muted);
    background: var(--panel-bg);
}

.pattern-item .pattern-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.7);
    color: white;
    font-size: 9px;
    padding: 2px 4px;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
}

.pattern-item .pattern-actions {
    position: absolute;
    top: 2px;
    right: 2px;
    display: none;
    gap: 2px;
}

.pattern-item:hover .pattern-actions {
    display: flex;
}

.pattern-item .pattern-actions button {
    background: rgba(0, 0, 0, 0.7);
    border: none;
    color: white;
    width: 18px;
    height: 18px;
    border-radius: 3px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 9px;
}

.pattern-item .pattern-actions button:hover {
    background: var(--accent-color);
}

.pattern-item .pattern-actions button.delete:hover {
    background: var(--danger-color);
}
/* =========================================
   Toast Notifications
   ========================================= */
.toast-notification {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: rgba(30, 30, 30, 0.95);
    color: var(--text-color);
    padding: 12px 24px;
    border-radius: 6px;
    font-size: 13px;
    z-index: 10000;
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
    border: 1px solid var(--border-color);
}

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

/* Toast Types */
.toast-notification.toast-success {
    background: rgba(39, 174, 96, 0.95);
    border-color: #27ae60;
    color: white;
}

.toast-notification.toast-warning {
    background: rgba(241, 196, 15, 0.95);
    border-color: #f1c40f;
    color: #333;
}

.toast-notification.toast-error {
    background: rgba(231, 76, 60, 0.95);
    border-color: #e74c3c;
    color: white;
}

/* =========================================
   Loading Overlay
   ========================================= */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10001;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
    backdrop-filter: blur(4px);
}

.loading-overlay.show {
    opacity: 1;
    visibility: visible;
}

.loading-content {
    background: rgba(30, 30, 30, 0.95);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 32px 48px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 255, 255, 0.1);
    border-top-color: var(--accent-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 16px;
}

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

.loading-message {
    color: var(--text-color);
    font-size: 14px;
    margin-bottom: 8px;
}

.loading-progress {
    width: 200px;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    overflow: hidden;
    margin-top: 16px;
}

.loading-progress-bar {
    height: 100%;
    background: var(--accent-color);
    transition: width 0.3s ease;
    border-radius: 2px;
}

/* Pattern Grid Improvements */
.pattern-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    min-height: 80px;
    max-height: 200px;
    overflow-y: auto;
    padding: 6px;
    background: var(--canvas-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

/* Button Row Styles */
.btn-row {
    display: flex;
    gap: 6px;
    margin-bottom: 8px;
}

.btn-row .btn-secondary,
.btn-row .btn-accent {
    flex: 1;
    padding: 6px 8px;
    font-size: 11px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    transition: background 0.2s;
}

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

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

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

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

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

.btn-danger:hover {
    background: #d43c3c;
}

/* Pattern Library Section */
.library-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.library-header h4 {
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.library-actions button {
    padding: 4px 8px;
    font-size: 10px;
    background: var(--input-bg);
    border: none;
    border-radius: 3px;
    color: var(--text-color);
    cursor: pointer;
}

.library-actions button:hover {
    background: var(--accent-color);
}

/* Tile Export Button */
.btn-tile-export,
.btn-tile-delete {
    background: rgba(0, 0, 0, 0.6) !important;
    padding: 3px !important;
}

.btn-tile-delete:hover {
    background: var(--danger-color) !important;
}

/* =========================================
   REDESIGNED SIDEBAR - Cleaner UI
   Toggle buttons, better organization,
   mobile-friendly controls
   ========================================= */

/* ========== Main Toggle Card (Symmetry Master) ========== */
.main-toggle-card {
    background: linear-gradient(135deg, rgba(14, 99, 156, 0.2) 0%, rgba(14, 99, 156, 0.1) 100%);
    border: 1px solid var(--accent-color);
    border-radius: 8px;
    padding: 12px;
    margin-bottom: 12px;
}

.toggle-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-card-icon {
    width: 36px;
    height: 36px;
    background: var(--accent-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    flex-shrink: 0;
}

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

.toggle-card-title {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-hover);
}

.toggle-card-status {
    display: block;
    font-size: 10px;
    color: var(--accent-color);
    margin-top: 2px;
}

/* ========== Toggle Card (smaller) ========== */
.toggle-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 12px;
    margin-bottom: 10px;
    transition: border-color 0.15s, background 0.15s;
}

.toggle-card:hover {
    border-color: rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
}

.toggle-card-content {
    display: flex;
    align-items: center;
    gap: 10px;
}

.toggle-card-icon-sm {
    font-size: 14px;
    color: var(--accent-color);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.toggle-card-text {
    flex: 1;
    min-width: 0;
}

.toggle-card-name {
    display: block;
    font-size: 12px;
    color: var(--text-color);
    font-weight: 500;
}

.toggle-card-desc {
    display: block;
    font-size: 9px;
    color: var(--text-muted);
    margin-top: 1px;
}

/* ========== Toggle Button (ON/OFF) ========== */
.toggle-btn {
    position: relative;
    width: 48px;
    height: 26px;
    background: #444;
    border: none;
    border-radius: 13px;
    cursor: pointer;
    transition: background 0.2s ease;
    flex-shrink: 0;
    overflow: hidden;
}

.toggle-btn::before {
    content: '';
    position: absolute;
    left: 3px;
    top: 3px;
    width: 20px;
    height: 20px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.2s ease;
}

.toggle-btn.active {
    background: #27ae60;
}

.toggle-btn.active::before {
    transform: translateX(22px);
}

.toggle-btn .toggle-label-on,
.toggle-btn .toggle-label-off {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 8px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: opacity 0.15s;
}

.toggle-btn .toggle-label-on {
    left: 6px;
    color: white;
    opacity: 0;
}

.toggle-btn .toggle-label-off {
    right: 6px;
    color: #999;
}

.toggle-btn.active .toggle-label-on {
    opacity: 1;
}

.toggle-btn.active .toggle-label-off {
    opacity: 0;
}

/* Toggle Card Compact Variant */
.toggle-card.compact {
    padding: 8px 10px;
    margin-bottom: 6px;
}

.toggle-card.compact .toggle-card-icon-sm {
    font-size: 12px;
    width: 18px;
}

.toggle-card.compact .toggle-card-name {
    font-size: 11px;
}

.toggle-card.compact .toggle-card-desc {
    font-size: 8px;
}

.toggle-card.compact .toggle-btn {
    width: 42px;
    height: 22px;
    border-radius: 11px;
}

.toggle-card.compact .toggle-btn::before {
    left: 2px;
    top: 2px;
    width: 18px;
    height: 18px;
}

.toggle-card.compact .toggle-btn.active::before {
    transform: translateX(20px);
}

.toggle-card.compact .toggle-btn .toggle-label-on,
.toggle-card.compact .toggle-btn .toggle-label-off {
    font-size: 7px;
}

.toggle-card.compact .toggle-btn .toggle-label-on {
    left: 5px;
}

.toggle-card.compact .toggle-btn .toggle-label-off {
    right: 5px;
}

/* ========== Control Group ========== */
.control-group {
    margin-bottom: 12px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.control-group:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.control-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

.control-label > span:first-child {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.control-hint {
    font-size: 9px;
    color: var(--text-muted);
    opacity: 0.7;
}

.control-value {
    font-size: 11px;
    color: var(--accent-color);
    font-weight: 600;
    background: rgba(14, 99, 156, 0.2);
    padding: 2px 8px;
    border-radius: 4px;
}

.control-badge {
    font-size: 10px;
    color: white;
    background: var(--accent-color);
    padding: 2px 8px;
    border-radius: 10px;
    font-weight: 600;
}

/* ========== Mode Grid (Symmetry Modes) ========== */
.mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
}

.mode-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 6px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s ease;
    min-height: 50px;
}

.mode-btn i {
    font-size: 16px;
}

.mode-btn span {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
    transform: translateY(-1px);
}

.mode-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    box-shadow: 0 2px 8px rgba(14, 99, 156, 0.3);
}

/* Pattern brush mode button - special styling */
.mode-btn.pattern-brush-btn {
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.3) 0%, rgba(142, 68, 173, 0.3) 100%);
    border-color: rgba(155, 89, 182, 0.5);
}

.mode-btn.pattern-brush-btn:hover {
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.5) 0%, rgba(142, 68, 173, 0.5) 100%);
}

.mode-btn.pattern-brush-btn.active {
    background: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
    border-color: #9b59b6;
}

/* Advanced modes dropdown */
.advanced-modes {
    margin-top: 8px;
}

.advanced-modes summary {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 4px;
    transition: background 0.15s;
    list-style: none;
}

.advanced-modes summary::-webkit-details-marker {
    display: none;
}

.advanced-modes summary:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
}

.advanced-modes summary i {
    transition: transform 0.2s;
}

.advanced-modes[open] summary i {
    transform: rotate(90deg);
}

.mode-grid-secondary {
    margin-top: 8px;
    grid-template-columns: repeat(4, 1fr);
}

.mode-grid-secondary .mode-btn {
    min-height: 44px;
    padding: 8px 4px;
}

.mode-grid-secondary .mode-btn i {
    font-size: 14px;
}

.mode-grid-secondary .mode-btn span {
    font-size: 8px;
}

/* ========== Segment Control ========== */
.segment-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.quick-segments {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.seg-btn {
    width: 32px;
    height: 28px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.seg-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
}

.seg-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.segment-slider {
    width: 100%;
    height: 4px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
}

.segment-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid white;
}

/* ========== Guide Options ========== */
.guide-options {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 10px;
}

.guide-option {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    text-align: left;
    font-size: 11px;
}

.guide-option i {
    width: 18px;
    text-align: center;
    font-size: 12px;
}

.guide-option:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
}

.guide-option.active {
    background: rgba(14, 99, 156, 0.2);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Guide Settings */
.guide-settings {
    margin-top: 8px;
}

.guide-settings summary {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 10px;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px 8px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 4px;
    transition: background 0.15s;
    list-style: none;
}

.guide-settings summary::-webkit-details-marker {
    display: none;
}

.guide-settings summary:hover {
    background: rgba(255, 255, 255, 0.05);
}

.guide-settings > div {
    padding: 10px 0 0 0;
}

/* ========== Slider Row ========== */
.slider-row {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

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

.slider-row label {
    font-size: 11px;
    color: var(--text-muted);
    width: 55px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.slider-row label i {
    font-size: 10px;
    width: 14px;
    text-align: center;
    color: var(--accent-color);
}

.slider-row input[type="range"] {
    flex: 1;
    min-width: 60px;
    height: 4px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
}

.slider-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 14px;
    height: 14px;
    background: #d4d4d4;
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--panel-bg);
    transition: all 0.1s;
}

.slider-row input[type="range"]::-webkit-slider-thumb:hover {
    background: #fff;
    transform: scale(1.1);
}

.slider-row .val {
    font-size: 11px;
    color: var(--text-color);
    min-width: 36px;
    text-align: right;
    flex-shrink: 0;
}

/* ========== Option Row (Checkboxes) ========== */
.option-row {
    margin-bottom: 6px;
}

.option-row label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-muted);
    cursor: pointer;
}

.option-row input[type="checkbox"] {
    accent-color: var(--accent-color);
}

/* ========== Color Section ========== */
.color-section {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.color-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 8px;
}

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

.color-label input[type="color"] {
    width: 60px;
    height: 24px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    cursor: pointer;
    -webkit-appearance: none;
    background: none;
    padding: 0;
}

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

.color-label input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 2px;
}

/* ========== Option Toggle (Checkbox with label) ========== */
.option-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    cursor: pointer;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.option-toggle:last-child {
    border-bottom: none;
}

.option-toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-color);
    flex-shrink: 0;
}

.option-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 11px;
    color: var(--text-color);
}

.option-info i {
    font-size: 12px;
    color: var(--accent-color);
    width: 16px;
    text-align: center;
}

.brush-options,
.shape-options,
.path-options {
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ========== Pattern Settings ========== */
.pattern-settings {
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ========== Action Buttons ========== */
.tile-actions {
    display: flex;
    gap: 6px;
    margin-bottom: 10px;
}

.action-btn {
    flex: 1;
    padding: 8px 10px;
    border: none;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 5px;
    transition: all 0.15s;
}

.action-btn i {
    font-size: 10px;
}

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

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

.action-btn.secondary {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-color);
}

.action-btn.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.action-btn.success {
    background: #27ae60;
    color: white;
}

.action-btn.success:hover {
    background: #2ecc71;
}

.action-btn.danger {
    background: transparent;
    color: var(--danger-color);
    border: 1px solid var(--danger-color);
    flex: 0;
    padding: 8px 12px;
}

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

.mini-action-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 6px;
    font-size: 11px;
    border-radius: 4px;
    transition: all 0.15s;
}

.mini-action-btn:hover {
    background: var(--accent-color);
    color: white;
}

/* ========== Responsive Improvements for Sidebar ========== */
@media (max-width: 768px) {
    /* Larger touch targets on mobile */
    .toggle-btn {
        width: 54px;
        height: 30px;
    }
    
    .toggle-btn::before {
        width: 24px;
        height: 24px;
    }
    
    .toggle-btn.active::before {
        transform: translateX(24px);
    }
    
    .mode-btn {
        min-height: 56px;
        padding: 12px 8px;
    }
    
    .mode-btn i {
        font-size: 18px;
    }
    
    .seg-btn {
        width: 38px;
        height: 34px;
        font-size: 12px;
    }
    
    .slider-row input[type="range"]::-webkit-slider-thumb {
        width: 20px;
        height: 20px;
    }
    
    .option-toggle {
        padding: 12px 0;
    }
    
    .option-toggle input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }
    
    .guide-option {
        padding: 12px;
    }
    
    .action-btn {
        padding: 12px;
        font-size: 12px;
    }
    
    .toggle-card {
        padding: 12px 14px;
    }
    
    .main-toggle-card {
        padding: 14px;
    }
    
    .toggle-card-icon {
        width: 42px;
        height: 42px;
        font-size: 18px;
    }
}

/* Touch device specific improvements */
@media (hover: none) and (pointer: coarse) {
    .toggle-btn:active {
        transform: scale(0.95);
    }
    
    .mode-btn:active {
        transform: scale(0.95);
    }
    
    .seg-btn:active {
        transform: scale(0.95);
    }
    
    .guide-option:active {
        transform: scale(0.98);
    }
    
    .action-btn:active {
        transform: scale(0.97);
    }
}

/* =========================================
   REDESIGNED PANELS - Brush, Shapes, Patterns, Path Tools, Layers
   Clean, intuitive, mobile-friendly
   ========================================= */

/* ========== Color Picker Card ========== */
.color-picker-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 10px;
}

.color-input-lg {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    -webkit-appearance: none;
    background: none;
    padding: 0;
}

.color-input-lg::-webkit-color-swatch-wrapper {
    padding: 3px;
}

.color-input-lg::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

.color-picker-info {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

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

.color-hex-value {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-hover);
    font-family: monospace;
    text-transform: uppercase;
}

/* ========== Color Palette ========== */
.color-palette {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}

.color-palette .swatch {
    aspect-ratio: 1;
    border-radius: 6px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s;
    box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.2);
}

.color-palette .swatch:hover {
    transform: scale(1.1);
    z-index: 1;
}

.color-palette .swatch.active {
    border-color: white;
    box-shadow: 0 0 0 2px var(--accent-color);
}

/* ========== Size Control with Presets ========== */
.size-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.size-presets {
    display: flex;
    gap: 4px;
}

.size-btn {
    flex: 1;
    padding: 6px 0;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s;
}

.size-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
}

.size-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

.full-slider {
    width: 100%;
    height: 4px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
}

.full-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--accent-color);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid white;
}

/* ========== Dual Sliders (Compact Layout) ========== */
.dual-sliders {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
}

.slider-compact {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.slider-compact-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 10px;
    color: var(--text-muted);
}

.slider-compact-header span:first-child {
    display: flex;
    align-items: center;
    gap: 5px;
}

.slider-compact-header span:first-child i {
    font-size: 9px;
    color: var(--accent-color);
}

.slider-compact-header .val {
    color: var(--text-color);
    font-weight: 600;
}

.slider-compact input[type="range"] {
    width: 100%;
    height: 4px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
}

.slider-compact input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: #d4d4d4;
    border-radius: 50%;
    cursor: pointer;
}

/* ========== Options Details (Expandable) ========== */
.options-details {
    margin-top: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    overflow: hidden;
}

.options-details summary {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    font-size: 11px;
    font-weight: 500;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.02);
    cursor: pointer;
    list-style: none;
    transition: background 0.15s;
}

.options-details summary::-webkit-details-marker {
    display: none;
}

.options-details summary::after {
    content: '\f078';
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    font-size: 9px;
    margin-left: auto;
    transition: transform 0.2s;
}

.options-details[open] summary::after {
    transform: rotate(180deg);
}

.options-details summary:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-color);
}

.options-details summary i {
    font-size: 12px;
    color: var(--accent-color);
    width: 16px;
    text-align: center;
}

.options-details > .options-list,
.options-details > .adjustment-sliders,
.options-details > .manual-tools-grid,
.options-details > div {
    padding: 10px 12px;
    border-top: 1px solid var(--border-color);
}

/* ========== Options List ========== */
.options-list {
    display: flex;
    flex-direction: column;
}

.options-list .option-toggle {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    cursor: pointer;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.options-list .option-toggle:last-child {
    border-bottom: none;
}

.options-list .option-toggle input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent-color);
    flex-shrink: 0;
}

.options-list .option-info {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    min-width: 0;
}

.options-list .option-info i {
    font-size: 12px;
    color: var(--accent-color);
    width: 16px;
    text-align: center;
    flex-shrink: 0;
}

.options-list .option-info span {
    font-size: 11px;
    color: var(--text-color);
}

.option-hint {
    font-size: 9px;
    color: var(--text-muted);
    margin-left: auto;
    flex-shrink: 0;
}

/* ========== Search Input ========== */
.search-input-wrapper {
    position: relative;
    margin-bottom: 10px;
}

.search-input-wrapper input {
    width: 100%;
    padding: 10px 12px 10px 34px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    font-size: 12px;
    transition: all 0.15s;
}

.search-input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.08);
}

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

.search-input-wrapper .search-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 12px;
    pointer-events: none;
}

.search-input-wrapper .search-clear {
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px 6px;
    border-radius: 4px;
    opacity: 0;
    transition: all 0.15s;
}

.search-input-wrapper input:not(:placeholder-shown) + .search-icon + .search-clear,
.search-input-wrapper .search-clear:focus {
    opacity: 1;
}

.search-input-wrapper .search-clear:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

/* ========== Shapes Grid ========== */
.shapes-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 10px;
    max-height: 200px;
    overflow-y: auto;
    padding: 2px;
}

.shapes-grid .shape-btn,
.shapes-grid button[data-shape] {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    padding: 6px;
}

.shapes-grid button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
}

.shapes-grid button.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.shapes-grid button i,
.shapes-grid button svg {
    font-size: 16px;
    width: 20px;
    height: 20px;
}

.shapes-grid button span {
    font-size: 8px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

/* ========== Patterns Grid ========== */
.patterns-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 10px;
    max-height: 180px;
    overflow-y: auto;
    padding: 2px;
}

.patterns-grid .pattern-btn,
.patterns-grid button[data-pattern] {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid transparent;
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
    padding: 4px;
    min-height: 44px;
}

.patterns-grid button:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
    transform: scale(1.02);
}

.patterns-grid button.active {
    background: linear-gradient(135deg, rgba(155, 89, 182, 0.4) 0%, rgba(142, 68, 173, 0.4) 100%);
    color: white;
    border-color: #9b59b6;
}

.patterns-grid button .pattern-icon {
    font-size: 16px;
}

.patterns-grid button span {
    font-size: 7px;
    text-transform: uppercase;
    letter-spacing: 0.2px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.loading-indicator {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 20px;
    color: var(--text-muted);
    font-size: 11px;
}

.loading-indicator i {
    font-size: 20px;
    color: var(--accent-color);
}

/* ========== Panel Intro Text ========== */
.panel-intro {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    margin-bottom: 10px;
    background: rgba(14, 99, 156, 0.1);
    border-radius: 6px;
    font-size: 11px;
    color: var(--accent-color);
}

.panel-intro i {
    font-size: 12px;
}

/* ========== Quick Actions Grid (Path Tools) ========== */
.quick-actions-grid {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.quick-action-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-color);
    cursor: pointer;
    text-align: left;
    transition: all 0.15s;
}

.quick-action-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-color);
}

.quick-action-btn:active {
    transform: scale(0.98);
}

.quick-action-btn i {
    font-size: 14px;
    color: var(--accent-color);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.quick-action-btn span {
    font-size: 12px;
    font-weight: 500;
}

.quick-action-btn small {
    margin-left: auto;
    font-size: 9px;
    color: var(--text-muted);
}

/* ========== Manual Tools Grid ========== */
.manual-tools-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 6px;
}

.tool-grid-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 6px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.tool-grid-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
}

.tool-grid-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.tool-grid-btn.danger:hover {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
    border-color: #e74c3c;
}

.tool-grid-btn i {
    font-size: 14px;
}

.tool-grid-btn span {
    font-size: 9px;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* ========== Utility Row ========== */
.utility-row {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}

.utility-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    font-size: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.utility-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-color);
}

.utility-btn i {
    font-size: 11px;
}

/* ========== Path Status ========== */
.path-status {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 10px;
    margin-top: 10px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 6px;
    font-size: 10px;
    color: var(--text-muted);
}

.path-status i {
    font-size: 11px;
}

/* ========== Layer Actions ========== */
.layer-actions {
    margin-bottom: 10px;
}

.layer-actions .action-btn {
    width: 100%;
}

.layer-hint {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 10px;
    margin-top: 10px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 6px;
    font-size: 10px;
    color: var(--text-muted);
}

.layer-hint i {
    color: #ffd700;
    font-size: 11px;
}

/* ========== Adjustment Sliders ========== */
.adjustment-sliders {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.adjustment-sliders .slider-row {
    margin-bottom: 0;
}

/* ========== Mobile Responsive for New Panels ========== */
@media (max-width: 768px) {
    .color-input-lg {
        width: 56px;
        height: 56px;
    }
    
    .color-palette {
        gap: 8px;
    }
    
    .color-palette .swatch {
        min-height: 36px;
    }
    
    .size-btn {
        padding: 10px 0;
        font-size: 12px;
    }
    
    .quick-action-btn {
        padding: 14px;
    }
    
    .quick-action-btn i {
        font-size: 16px;
    }
    
    .tool-grid-btn {
        padding: 14px 8px;
    }
    
    .tool-grid-btn i {
        font-size: 16px;
    }
    
    .shapes-grid,
    .patterns-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .options-list .option-toggle {
        padding: 14px 0;
    }
    
    .options-list .option-toggle input[type="checkbox"] {
        width: 20px;
        height: 20px;
    }
    
    .search-input-wrapper input {
        padding: 14px 12px 14px 38px;
        font-size: 14px;
    }
}

/* Touch improvements for new elements */
@media (hover: none) and (pointer: coarse) {
    .size-btn:active,
    .quick-action-btn:active,
    .tool-grid-btn:active,
    .utility-btn:active {
        transform: scale(0.95);
    }
    
    .color-palette .swatch:active {
        transform: scale(0.9);
    }
    
    .shapes-grid button:active,
    .patterns-grid button:active {
        transform: scale(0.92);
    }
}

/* =========================================
   PATH TOOLS - Compact & Clean Layout
   ========================================= */

/* Path Actions Grid - 4 equal buttons */
.path-actions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    margin-bottom: 12px;
}

.path-action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 4px;
    padding: 10px 4px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.path-action-btn:hover {
    background: rgba(255, 255, 255, 0.12);
    color: var(--text-hover);
    border-color: var(--accent-color);
}

.path-action-btn:active {
    transform: scale(0.95);
}

.path-action-btn i {
    font-size: 14px;
    color: var(--accent-color);
}

.path-action-btn span {
    font-size: 9px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* Toggle Options Section - Auto behaviors */
.toggle-options-section {
    display: flex;
    gap: 6px;
    margin-bottom: 12px;
}

.toggle-option {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px 4px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.15s;
}

.toggle-option:hover {
    background: rgba(255, 255, 255, 0.08);
}

.toggle-option.active {
    background: rgba(14, 99, 156, 0.2);
    border-color: var(--accent-color);
}

.toggle-option.active .toggle-option-icon {
    color: var(--accent-color);
}

.toggle-option.active .toggle-option-label {
    color: var(--text-hover);
}

.toggle-option-icon {
    font-size: 14px;
    color: var(--text-muted);
    transition: color 0.15s;
}

.toggle-option-label {
    font-size: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2px;
    color: var(--text-muted);
    text-align: center;
    transition: color 0.15s;
}

/* Selection Tools Row - Compact icons */
.selection-tools-row {
    display: flex;
    gap: 4px;
}

.selection-tool-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 10px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-muted);
    cursor: pointer;
    transition: all 0.15s;
}

.selection-tool-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-hover);
}

.selection-tool-btn.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.selection-tool-btn.danger:hover {
    background: rgba(231, 76, 60, 0.2);
    color: #e74c3c;
    border-color: #e74c3c;
}

.selection-tool-btn i {
    font-size: 12px;
}

/* =========================================
   BRUSH OPTIONS - Toggle Buttons Row
   ========================================= */

.brush-options-row {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}

.brush-options-row .toggle-btn {
    flex: 1;
    padding: 8px 10px;
    font-size: 11px;
}

/* =========================================
   PATTERNS PANEL - Improved Layout
   ========================================= */

/* Pattern Container - proper scrolling */
.pattern-container {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 10px;
    padding: 2px;
}

/* Pattern Adjustments - Compact inline sliders */
.pattern-adjustments {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 10px;
    padding: 8px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 6px;
}

.adjustment-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.adjustment-row .adj-label {
    width: 20px;
    text-align: center;
    color: var(--accent-color);
    font-size: 11px;
}

.adjustment-row input[type="range"] {
    flex: 1;
    height: 4px;
    background: #444;
    border-radius: 2px;
    -webkit-appearance: none;
    outline: none;
}

.adjustment-row input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: #d4d4d4;
    border-radius: 50%;
    cursor: pointer;
}

.adjustment-row .adj-val {
    width: 32px;
    font-size: 10px;
    color: var(--text-muted);
    text-align: right;
}

/* Pattern Symmetry Toggle */
.pattern-symmetry-toggle {
    display: flex;
}

.pattern-symmetry-toggle .toggle-btn {
    flex: 1;
}

/* =========================================
   SHAPES PANEL - Toggle Options Row
   ========================================= */

.shape-options-row {
    display: flex;
    gap: 6px;
    margin-top: 10px;
}

.shape-options-row .toggle-btn {
    flex: 1;
    padding: 8px 10px;
    font-size: 11px;
}

/* =========================================
   Touch Improvements for New Components
   ========================================= */

@media (hover: none) and (pointer: coarse) {
    .path-action-btn {
        padding: 14px 6px;
    }
    
    .path-action-btn i {
        font-size: 16px;
    }
    
    .toggle-option {
        padding: 12px 6px;
    }
    
    .selection-tool-btn {
        padding: 14px;
    }
    
    .selection-tool-btn i {
        font-size: 14px;
    }
    
    .path-action-btn:active,
    .toggle-option:active,
    .selection-tool-btn:active {
        transform: scale(0.95);
    }
}

/* =========================================
   PROFESSIONAL STYLUS SETTINGS
   ========================================= */

.stylus-settings {
    background: rgba(14, 99, 156, 0.08);
    border-radius: 8px;
    padding: 10px;
    margin-top: 8px;
    border: 1px solid rgba(14, 99, 156, 0.2);
}

.stylus-header {
    margin-bottom: 10px;
    padding-bottom: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.stylus-header span {
    color: var(--accent-color) !important;
    font-size: 10px !important;
}

.stylus-settings .slider-compact {
    margin-bottom: 10px;
}

/* Pressure Curve Dropdown */
.pressure-curve-control {
    margin-bottom: 10px;
}

.pressure-curve-header {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 6px;
    font-size: 10px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pressure-curve-header i {
    font-size: 10px;
    color: var(--accent-color);
}

.pressure-curve-select {
    width: 100%;
    padding: 8px 10px;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 11px;
    cursor: pointer;
    transition: all 0.2s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath fill='%23999' d='M0 0l5 6 5-6z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 10px center;
    padding-right: 28px;
}

.pressure-curve-select:hover {
    border-color: rgba(14, 99, 156, 0.5);
    background-color: rgba(0, 0, 0, 0.4);
}

.pressure-curve-select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(14, 99, 156, 0.2);
}

.pressure-curve-select option {
    background: #1e1e1e;
    color: var(--text-primary);
    padding: 8px;
}

/* Advanced Stylus Options */
.stylus-advanced-options {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-top: 8px;
    padding-top: 8px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* Mini toggle cards for advanced options */
.toggle-card.mini {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    padding: 6px 8px;
    margin-bottom: 0;
}

.toggle-card.mini .toggle-card-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.toggle-card.mini .toggle-card-text {
    display: flex;
    flex-direction: column;
    gap: 1px;
    flex: 1;
}

.toggle-card.mini .toggle-card-name {
    font-size: 10px;
    color: var(--text-primary);
    font-weight: 500;
}

.toggle-card.mini .toggle-card-desc {
    font-size: 8px;
    color: var(--text-muted);
    opacity: 0.7;
}

.toggle-card.mini .toggle-btn {
    width: 38px;
    height: 20px;
    border-radius: 10px;
    flex-shrink: 0;
}

.toggle-card.mini .toggle-btn::before {
    left: 2px;
    top: 2px;
    width: 16px;
    height: 16px;
}

.toggle-card.mini .toggle-btn.active::before {
    transform: translateX(18px);
}

.toggle-card.mini .toggle-btn .toggle-label-on,
.toggle-card.mini .toggle-btn .toggle-label-off {
    font-size: 6px;
}

.toggle-card.mini .toggle-btn .toggle-label-on {
    left: 4px;
}

.toggle-card.mini .toggle-btn .toggle-label-off {
    right: 4px;
}

/* Predicted preview stroke */
.predicted-preview {
    pointer-events: none;
    opacity: 0.3;
}

/* Touch improvements for stylus settings */
@media (hover: none) and (pointer: coarse) {
    .pressure-curve-select {
        padding: 12px 10px;
        font-size: 12px;
    }
    
    .toggle-card.mini {
        padding: 8px 10px;
    }
    
    .toggle-card.mini .toggle-card-name {
        font-size: 11px;
    }
    
    .toggle-card.mini .toggle-btn {
        width: 44px;
        height: 24px;
    }
    
    .toggle-card.mini .toggle-btn::before {
        width: 20px;
        height: 20px;
    }
}

/* =========================================
   AUTOSAVE RECOVERY DIALOG
   ========================================= */

.recovery-dialog-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.recovery-dialog {
    background: var(--panel-bg);
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    max-width: 420px;
    width: 90%;
    overflow: hidden;
    animation: slideUp 0.3s ease;
    border: 1px solid var(--border-color);
}

@keyframes slideUp {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

.recovery-dialog-header {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 20px 24px;
    background: var(--accent-color);
    color: var(--accent-text);
}

.recovery-dialog-header i {
    font-size: 24px;
}

.recovery-dialog-header h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
}

.recovery-dialog-body {
    padding: 24px;
}

.recovery-dialog-body p {
    margin: 0 0 12px 0;
    color: var(--text-color);
    font-size: 14px;
}

.recovery-timestamp {
    background: var(--input-bg);
    padding: 10px 14px;
    border-radius: 6px;
    font-family: monospace;
    font-size: 13px;
    color: var(--accent-color);
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.recovery-preview {
    width: 100%;
    height: 220px;
    background: var(--canvas-bg);
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--border-color);
    padding: 16px;
    box-sizing: border-box;
}

.recovery-preview img,
.recovery-preview svg {
    max-width: 100%;
    max-height: 100%;
    width: auto !important;
    height: auto !important;
    object-fit: contain;
    margin: auto;
}

.recovery-dialog-footer {
    display: flex;
    gap: 12px;
    padding: 16px 24px;
    background: var(--header-bg);
    border-top: 1px solid var(--border-color);
}

.recovery-btn {
    flex: 1;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s ease;
    border: none;
}

.recovery-btn.secondary {
    background: var(--btn-bg);
    color: var(--text-muted);
}

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

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

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

/* =========================================
   FLOATING UNDO/REDO TOOLBAR
   ========================================= */

.floating-history-toolbar {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 4px;
    background: var(--panel-bg);
    padding: 6px 10px;
    border-radius: 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    z-index: 100;
    border: 1px solid var(--border-color);
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.floating-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-color);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    transition: all 0.15s ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    -webkit-appearance: none;
    user-select: none;
}

.floating-btn:hover:not(:disabled) {
    background: var(--btn-hover-bg);
    color: var(--text-hover);
}

.floating-btn:active:not(:disabled) {
    background: var(--accent-color);
    color: var(--accent-text);
    transform: scale(0.95);
}

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

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

.autosave-status {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    color: var(--text-muted);
    transition: color 0.3s ease;
}

.autosave-status.saving {
    color: #f39c12;
    animation: pulse 1s ease infinite;
}

.autosave-status.saved {
    color: #2ecc71;
}

.autosave-status.unsaved {
    color: var(--danger-color);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* Hide top-bar undo/redo on desktop since we have floating toolbar */
@media (min-width: 769px) {
    .topbar-left .tool-group:first-of-type {
        /* Keep for mobile fallback but hide on desktop */
        /* Commenting out to keep as backup in header */
    }
}

/* Mobile: Show floating toolbar differently */
@media (max-width: 768px) {
    .floating-history-toolbar {
        bottom: 70px; /* Above mobile toolbar */
        left: 50%;
        transform: translateX(-50%);
        padding: 8px 12px;
    }
    
    .floating-btn {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}

/* =========================================
   PWA STANDALONE MODE STYLES
   iOS App-like experience when installed
   ========================================= */

/* Detect standalone mode via CSS */
@media all and (display-mode: standalone) {
    /* Add safe area padding for iOS notch */
    .app-container {
        padding-top: env(safe-area-inset-top);
        padding-bottom: env(safe-area-inset-bottom);
        padding-left: env(safe-area-inset-left);
        padding-right: env(safe-area-inset-right);
    }
    
    /* Make header taller for iOS status bar */
    .topbar {
        padding-top: env(safe-area-inset-top, 10px);
    }
    
    /* Ensure full viewport usage */
    html, body {
        height: 100%;
        height: -webkit-fill-available;
        overflow: hidden;
    }
    
    .app-container {
        height: 100vh;
        height: -webkit-fill-available;
    }
}

/* Class-based standalone detection (set via JS) */
html.pwa-standalone {
    /* Same safe area adjustments */
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
}

html.pwa-standalone .app-container {
    padding-top: var(--safe-top);
    padding-bottom: var(--safe-bottom);
    padding-left: var(--safe-left);
    padding-right: var(--safe-right);
}

html.pwa-standalone .topbar {
    padding-top: calc(var(--safe-top) + 6px);
}

/* Prevent overscroll/bounce on iOS */
html.pwa-standalone body {
    overscroll-behavior: none;
    -webkit-overflow-scrolling: touch;
}

/* Touch optimizations for PWA */
html.pwa-standalone .tool-btn,
html.pwa-standalone .icon-btn,
html.pwa-standalone button {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

/* Prevent text selection on buttons in PWA mode */
html.pwa-standalone .topbar,
html.pwa-standalone .sidebar,
html.pwa-standalone .tool-btn {
    -webkit-user-select: none;
    user-select: none;
}

/* PWA-specific icon strip and sidebar fixes */
html.pwa-standalone .sidebar-icon-strip {
    display: none;
}

html.pwa-standalone .studio-layout.sidebar-collapsed .sidebar-icon-strip {
    display: flex;
}

/* Hide tooltips completely in PWA mode */
html.pwa-standalone .icon-tooltip {
    display: none !important;
}

/* PWA mobile-specific fixes */
@media (max-width: 768px) {
    /* In PWA mode on phones, hide icon strip and use mobile drawer */
    html.pwa-standalone .sidebar-icon-strip,
    html.pwa-standalone .sidebar-flyout,
    html.pwa-standalone .sidebar-flyout-backdrop {
        display: none !important;
    }
    
    /* Show mobile sidebar toggle in PWA mode */
    html.pwa-standalone .mobile-sidebar-toggle {
        display: flex !important;
        position: fixed;
        bottom: 20px;
        right: 20px;
        width: 56px;
        height: 56px;
        background: var(--accent-color);
        border: none;
        border-radius: 50%;
        color: white;
        font-size: 20px;
        cursor: pointer;
        z-index: 500;
        box-shadow: 0 4px 20px rgba(0,0,0,0.5);
        align-items: center;
        justify-content: center;
        -webkit-tap-highlight-color: transparent;
    }
    
    html.pwa-standalone .mobile-sidebar-toggle:active {
        transform: scale(0.9);
        background: var(--accent-dark);
    }
    
    html.pwa-standalone .mobile-sidebar-toggle.open {
        background: var(--danger-color);
    }
    
    /* Mobile sidebar backdrop in PWA */
    html.pwa-standalone .mobile-sidebar-backdrop.visible {
        display: block !important;
    }
    
    /* Sidebar slides in from right in PWA mobile */
    html.pwa-standalone .studio-sidebar {
        position: fixed;
        top: var(--header-height);
        right: 0;
        bottom: 0;
        width: 280px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 480;
    }
    
    html.pwa-standalone .studio-sidebar.mobile-open {
        transform: translateX(0);
    }
}

/* =========================================
   Welding Points - Visual Anchor Indicators
   Provides Illustrator-like anchor point display
   ========================================= */

/* Welding point indicator base style */
.welding-point {
    transition: r 0.15s ease-out, fill 0.15s ease-out;
    pointer-events: none;
    animation: weldingBreathe 1.5s ease-in-out infinite;
}

/* Breathing animation for visibility */
@keyframes weldingBreathe {
    0%, 100% {
        opacity: 0.7;
        transform-origin: center;
    }
    50% {
        opacity: 1;
    }
}

/* Highlighted welding point (cursor nearby) */
.welding-point.highlighted {
    filter: drop-shadow(0 0 6px currentColor);
    animation: weldingPulse 0.5s ease-in-out infinite;
}

/* Welding point pulse animation */
@keyframes weldingPulse {
    0%, 100% {
        opacity: 0.9;
    }
    50% {
        opacity: 1;
    }
}

/* Snap preview line - shows connection path */
.snap-preview-line {
    stroke-linecap: round;
    pointer-events: none;
    animation: dashMove 0.5s linear infinite;
}

@keyframes dashMove {
    to {
        stroke-dashoffset: -8;
    }
}

/* Welding point group - ensure proper z-index */
#welding-points-group {
    pointer-events: none;
}

/* Connection indicator - shows when endpoints are welded */
.weld-connection-indicator {
    fill: none;
    stroke: var(--accent-color, #00ff88);
    stroke-width: 2;
    stroke-dasharray: 3, 3;
    opacity: 0.6;
    pointer-events: none;
}

/* Status indicator for snap mode */
.snap-mode-indicator {
    position: fixed;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 255, 136, 0.9);
    color: #000;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    z-index: 200;
    display: none;
    pointer-events: none;
    box-shadow: 0 2px 10px rgba(0, 255, 136, 0.3);
}

.snap-mode-indicator.visible {
    display: block;
    animation: slideUp 0.2s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateX(-50%) translateY(10px);
        opacity: 0;
    }
    to {
        transform: translateX(-50%) translateY(0);
        opacity: 1;
    }
}

/* Welding point types - color coding */
.welding-point[data-type="start"] {
    /* Blue for start points */
}

.welding-point[data-type="end"] {
    /* Red/Pink for end points */
}

.welding-point[data-type="welded"] {
    /* Green for welded connections */
}

/* Larger touch targets for mobile */
@media (max-width: 768px) {
    .welding-point {
        /* Slightly larger on touch devices */
        stroke-width: 1;
    }
}

/* Disable animations for users who prefer reduced motion (accessibility + performance) */
@media (prefers-reduced-motion: reduce) {
    .welding-point {
        animation: none !important;
    }
    .welding-point.highlighted {
        animation: none !important;
    }
    .snap-preview-line {
        animation: none !important;
    }
}

/* Mobile performance: reduce animations on touch devices */
@media (hover: none) and (pointer: coarse) {
    .welding-point {
        /* Simpler animation for mobile */
        animation: none;
        opacity: 0.85;
    }
    .welding-point.highlighted {
        animation: none;
        opacity: 1;
        filter: drop-shadow(0 0 4px currentColor);
    }
    .snap-preview-line {
        /* Simpler dash animation */
        animation: none;
    }
}

/* Light theme adjustments for welding points */
[data-theme="light"] .snap-preview-line {
    stroke: #0066cc;
}

[data-theme="light"] .snap-mode-indicator {
    background: rgba(0, 102, 204, 0.9);
    color: #fff;
}

/* =========================================
   Smart Snap Toggle Button Enhancement
   ========================================= */

/* Highlight snap toggle when active */
.tool-toggle.snap-active {
    background: rgba(0, 255, 136, 0.2) !important;
    border-color: #00ff88 !important;
    color: #00ff88 !important;
}

/* Snap enabled indicator in sidebar */
.snap-enabled-badge {
    display: inline-block;
    width: 8px;
    height: 8px;
    background: #00ff88;
    border-radius: 50%;
    margin-left: 6px;
    animation: snapPulse 1.5s ease-in-out infinite;
}

@keyframes snapPulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(0.8);
    }
}