/* ===== CSS Variables & Design System - Solarized Dark ===== */
:root {
    /* Solarized Dark Base Colors */
    --base03: #002b36;
    --base02: #073642;
    --base01: #586e75;
    --base00: #657b83;
    --base0: #839496;
    --base1: #93a1a1;
    --base2: #eee8d5;
    --base3: #fdf6e3;

    /* Solarized Accent Colors */
    --yellow: #b58900;
    --orange: #cb4b16;
    --red: #dc322f;
    --magenta: #d33682;
    --violet: #6c71c4;
    --blue: #268bd2;
    --cyan: #2aa198;
    --green: #859900;

    /* Theme Colors */
    --primary-color: var(--blue);
    --primary-dark: #1e6ba8;
    --primary-light: #4fa3e0;
    --secondary-color: var(--violet);
    --accent-color: var(--magenta);

    --bg-primary: var(--base03);
    --bg-secondary: var(--base02);
    --bg-tertiary: #0a3642;
    --bg-hover: #094552;

    --text-primary: var(--base0);
    --text-secondary: var(--base1);
    --text-muted: var(--base01);

    --border-color: var(--base01);
    --border-light: var(--base00);

    --success: var(--green);
    --warning: var(--yellow);
    --error: var(--red);
    --info: var(--cyan);

    --scrollbar-color: var(--orange);

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.6);

    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 250ms ease-in-out;
    --transition-slow: 350ms ease-in-out;

    /* Sidebar */
    --sidebar-width: 280px;
    --sidebar-left-collapsed: 60px;
    --sidebar-right-collapsed: 0px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    height: 100vh;
}

/* ===== App Layout ===== */
#app {
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
    position: relative;
}

.app-main {
    flex: 1;
    display: flex;
    overflow: hidden;
    padding-bottom: 20px;
    /* Space for footer */
}

/* ===== Header ===== */
.app-header {
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-md);
    z-index: 100;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo i {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Toolbar */
.toolbar {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
}

.toolbar-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 1rem;
}

.toolbar-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-1px);
}

.toolbar-btn:active {
    transform: translateY(0);
}

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

.toolbar-divider {
    width: 1px;
    height: 24px;
    background: var(--border-color);
    margin: 0 var(--spacing-xs);
}

.zoom-level {
    color: var(--text-secondary);
    font-size: 0.875rem;
    min-width: 50px;
    text-align: center;
    font-weight: 500;
}

/* Buttons */
.btn-primary,
.btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.875rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
}

/* ===== Main Content ===== */
.app-main {
    display: flex;
    flex: 1;
    overflow: hidden;
}

/* ===== Sidebar ===== */
.sidebar {
    background: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
    overflow: hidden;
}

.sidebar-left {
    width: var(--sidebar-width);
    border-right: 1px solid var(--border-color);
}

.sidebar-right {
    width: var(--sidebar-width);
    border-left: 1px solid var(--border-color);
}

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

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

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

.sidebar-.header-center h1 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

/* ===== Footer ===== */
.app-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    font-size: 0.7rem;
}

.footer-left p {
    margin: 0;
    font-size: 0.7rem;
    color: var(--text-secondary);
    line-height: 20px;
}

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

.footer-credit {
    font-size: 0.7rem;
    color: var(--text-secondary);
}

.footer-credit a {
    color: var(--orange);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.footer-credit a:hover {
    color: var(--text-primary);
    text-decoration: underline;
}

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

.footer-social a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    border-radius: var(--radius-sm);
}

.footer-social a:hover {
    color: var(--orange);
    background: rgba(251, 146, 60, 0.1);
    transform: translateY(-1px);
}

.footer-social a:active {
    transform: translateY(0);
}

.sidebar-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.collapse-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-md);
}

/* Custom Scrollbar */
.sidebar-content::-webkit-scrollbar {
    width: 4px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--scrollbar-color);
    border-radius: var(--radius-sm);
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--orange);
    opacity: 0.8;
}

/* Expand Button for Collapsed Sidebars */
.expand-btn {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: var(--spacing-lg) var(--spacing-sm);
    cursor: pointer;
    z-index: 50;
    transition: all var(--transition-fast);
    border-radius: var(--radius-md);
    writing-mode: vertical-rl;
    text-orientation: mixed;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    display: none;
}

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

.expand-btn.left {
    left: 65px;
}

.expand-btn.right {
    right: 15px;
}

.sidebar.collapsed+.expand-btn {
    display: block;
}

/* Collapsed Left Sidebar - Icon Only View */
.sidebar-left.collapsed .sidebar-header h3,
.sidebar-left.collapsed .search-box,
.sidebar-left.collapsed .category-header span,
.sidebar-left.collapsed .toggle-icon,
.sidebar-left.collapsed .category-content {
    display: none;
}

.sidebar-left.collapsed .sidebar-content {
    padding: var(--spacing-sm);
}

.sidebar-left.collapsed .element-category {
    margin-bottom: var(--spacing-sm);
    background: transparent;
    border: none;
}

.sidebar-left.collapsed .category-header {
    padding: var(--spacing-md);
    justify-content: center;
}

.sidebar-left.collapsed .category-header i:first-child {
    font-size: 1.5rem;
    margin: 0;
}


/* Search Box */
.search-box {
    position: relative;
    margin-bottom: var(--spacing-lg);
}

.search-box i {
    position: absolute;
    left: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
}

.search-box input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md) var(--spacing-sm) 2.5rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Element Categories */
.element-category {
    margin-bottom: var(--spacing-md);
    background: var(--bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.category-header {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.category-header:hover {
    background: var(--bg-hover);
}

.category-header i:first-child {
    color: var(--primary-light);
}

.category-header span {
    flex: 1;
    font-weight: 600;
    font-size: 0.875rem;
}

.toggle-icon {
    transition: transform var(--transition-fast);
    color: var(--text-muted);
}

.element-category.collapsed .toggle-icon {
    transform: rotate(-90deg);
}

.element-category.collapsed .category-content {
    max-height: 0;
    padding: 0;
}

.category-content {
    max-height: 1000px;
    transition: all var(--transition-base);
    padding: var(--spacing-sm);
}

/* Element Items */
.element-item {
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: grab;
    transition: all var(--transition-fast);
    user-select: none;
}

.element-item:hover {
    background: var(--bg-hover);
    border-color: var(--primary-color);
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.element-item:active {
    cursor: grabbing;
}

.element-item i {
    color: var(--primary-light);
    font-size: 1.125rem;
}

.element-item span {
    font-size: 0.875rem;
    color: var(--text-primary);
}

/* ===== Canvas Area ===== */
.canvas-area {
    flex: 1;
    background: var(--bg-primary);
    overflow: auto;
    position: relative;
}

/* Canvas Area Scrollbar */
.canvas-area::-webkit-scrollbar {
    width: 4px;
    height: 4px;
}

.canvas-area::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

.canvas-area::-webkit-scrollbar-thumb {
    background: var(--scrollbar-color);
    border-radius: var(--radius-sm);
}

.canvas-area::-webkit-scrollbar-thumb:hover {
    background: var(--orange);
    opacity: 0.8;
}

.canvas-area::-webkit-scrollbar-corner {
    background: var(--bg-primary);
}

.canvas-wrapper {
    min-height: 100%;
    padding: var(--spacing-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

.canvas {
    background: white;
    min-width: 1200px;
    min-height: 800px;
    box-shadow: var(--shadow-xl);
    position: relative;
    border-radius: var(--radius-sm);
}

.canvas.grid-enabled {
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.05) 1px, transparent 1px);
    background-size: 20px 20px;
}

.canvas-placeholder {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #94a3b8;
}

.canvas-placeholder i {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

.canvas-placeholder p {
    font-size: 1.125rem;
    opacity: 0.5;
}

/* ===== Wireframe Elements ===== */
.wireframe-element {
    position: absolute;
    border: 2px solid var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
    cursor: move;
    transition: all var(--transition-fast);
}

.wireframe-element.selected {
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(236, 72, 153, 0.2);
    z-index: 10;
}

.wireframe-element:hover {
    border-color: var(--primary-light);
}

/* Resize Handles */
.resize-handle {
    position: absolute;
    width: 10px;
    height: 10px;
    background: white;
    border: 2px solid var(--primary-color);
    border-radius: 50%;
    display: none;
}

.wireframe-element.selected .resize-handle {
    display: block;
}

.resize-handle.nw {
    top: -5px;
    left: -5px;
    cursor: nw-resize;
}

.resize-handle.ne {
    top: -5px;
    right: -5px;
    cursor: ne-resize;
}

.resize-handle.sw {
    bottom: -5px;
    left: -5px;
    cursor: sw-resize;
}

.resize-handle.se {
    bottom: -5px;
    right: -5px;
    cursor: se-resize;
}

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

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

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

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

/* Element Content Styles */
.element-content {
    padding: var(--spacing-md);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1e293b;
    font-size: 0.875rem;
}

/* ===== Properties Panel ===== */
.no-selection {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.no-selection i {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

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

.property-section-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: var(--spacing-md);
    letter-spacing: 0.05em;
}

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

.property-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}

.property-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.property-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.property-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-sm);
}

.property-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: var(--spacing-sm);
}

.property-row-4 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr 1fr;
    gap: var(--spacing-sm);
}

.color-picker-wrapper {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.color-picker {
    width: 50px;
    height: 38px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    background: var(--bg-tertiary);
}

.color-picker::-webkit-color-swatch-wrapper {
    padding: 4px;
}

.color-picker::-webkit-color-swatch {
    border: none;
    border-radius: var(--radius-sm);
}

select.property-input {
    cursor: pointer;
}

.property-slider {
    width: 100%;
    height: 6px;
    border-radius: var(--radius-sm);
    background: var(--bg-tertiary);
    outline: none;
    -webkit-appearance: none;
}

.property-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.property-slider::-webkit-slider-thumb:hover {
    background: var(--primary-light);
    transform: scale(1.1);
}

.property-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary-color);
    cursor: pointer;
    border: none;
}

.property-checkbox {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

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

.delete-btn {
    width: 100%;
    padding: var(--spacing-md);
    background: var(--error);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-lg);
}

.delete-btn:hover {
    background: #dc2626;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ===== Modal ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    animation: modalSlideIn var(--transition-base);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

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

.modal-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

.modal-body {
    padding: var(--spacing-xl);
}

.export-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.export-option {
    padding: var(--spacing-xl);
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
}

.export-option:hover {
    border-color: var(--primary-color);
    background: var(--bg-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.export-option i {
    font-size: 2.5rem;
    color: var(--primary-light);
}

/* ===== Animations ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(20px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.fade-in {
    animation: fadeIn var(--transition-base);
}

/* ===== Context Menu ===== */
.context-menu {
    position: fixed;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    min-width: 200px;
    z-index: 2000;
    display: none;
    padding: var(--spacing-sm);
}

.context-menu.active {
    display: block;
}

.context-menu-item {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    color: var(--text-primary);
    font-size: 0.875rem;
}

.context-menu-item:hover {
    background: var(--bg-hover);
    color: var(--primary-light);
}

.context-menu-item i {
    width: 16px;
    text-align: center;
    color: var(--text-secondary);
}

.context-menu-item:hover i {
    color: var(--primary-light);
}

.context-menu-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-sm) 0;
}

/* ===== Modal Large Variant ===== */
.modal-large {
    max-width: 800px;
    max-height: 80vh;
}

.modal-large .modal-body {
    max-height: calc(80vh - 80px);
    overflow-y: auto;
}

/* ===== Layers Panel ===== */
.layers-list {
    min-height: 400px;
}

.no-layers {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-muted);
}

.no-layers i {
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.3;
}

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

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

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

.layer-icon {
    width: 40px;
    height: 40px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-light);
    font-size: 1.25rem;
}

.layer-info {
    flex: 1;
}

.layer-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.layer-type {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.layer-visibility {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

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

/* ===== Pages Panel ===== */
.pages-toolbar {
    margin-bottom: var(--spacing-lg);
}

.pages-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    max-height: calc(80vh - 200px);
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

/* Pages List Scrollbar */
.pages-list::-webkit-scrollbar {
    width: 4px;
}

.pages-list::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.pages-list::-webkit-scrollbar-thumb {
    background: var(--scrollbar-color);
    border-radius: var(--radius-sm);
}

.pages-list::-webkit-scrollbar-thumb:hover {
    background: var(--orange);
}

/* Remove outer scrollbar from Pages modal */
#pagesModal .modal-body {
    overflow: hidden;
}

.page-item {
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.page-item:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.page-item.active {
    border-color: var(--primary-color);
    background: var(--bg-hover);
}

.page-thumbnail {
    width: 100%;
    height: 120px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
}

.page-thumbnail i {
    font-size: 3rem;
    color: var(--text-muted);
}

.page-info {
    margin-bottom: var(--spacing-md);
}

.page-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.page-elements {
    display: block;
    font-size: 0.75rem;
    color: var(--text-muted);
}

.page-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.page-action-btn {
    flex: 1;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

/* ===== Markdown Generator ===== */
.markdown-toolbar {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.markdown-preview {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    min-height: 400px;
    max-height: calc(80vh - 200px);
    overflow-y: auto;
    overflow-x: hidden;
}

.markdown-preview pre {
    margin: 0;
    font-family: 'Courier New', monospace;
    font-size: 0.875rem;
    color: var(--text-primary);
    white-space: pre-wrap;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

.markdown-preview code {
    color: var(--text-primary);
    word-break: break-all;
}

.markdown-preview::-webkit-scrollbar {
    width: 4px;
}

.markdown-preview::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

.markdown-preview::-webkit-scrollbar-thumb {
    background: var(--scrollbar-color);
    border-radius: var(--radius-sm);
}

.markdown-preview::-webkit-scrollbar-thumb:hover {
    background: var(--orange);
}

/* Markdown Modal Footer */
.markdown-footer {
    height: 10px;
    background: var(--bg-tertiary);
    border-top: 1px solid var(--border-color);
}

/* Fix modal body overflow for markdown */
#markdownModal .modal-body {
    overflow: hidden;
    display: flex;
    flex-direction: column;
}



/* ===== Responsive Design ===== */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 240px;
    }

    .canvas {
        min-width: 800px;
        min-height: 600px;
    }
}

@media (max-width: 768px) {
    .header-center {
        display: none;
    }

    :root {
        --sidebar-width: 200px;
    }
}