/**
 * UniNexus - Windows 11 Theme
 * Modern Fluent Design System
 * @version 1.0.0
 */

/* =============================================
   CSS Variables - Windows 11 Design Tokens
   ============================================= */
:root {
    /* Accent Colors */
    --win-accent: #0078d4;
    --win-accent-light: #60cdff;
    --win-accent-dark: #005a9e;
    
    /* Background Colors */
    --win-bg-solid: #f3f3f3;
    --win-bg-mica: rgba(243, 243, 243, 0.85);
    --win-bg-acrylic: rgba(255, 255, 255, 0.7);
    --win-bg-smoke: rgba(0, 0, 0, 0.3);
    
    /* Surface Colors */
    --win-surface: #ffffff;
    --win-surface-hover: #f9f9f9;
    --win-surface-active: #f0f0f0;
    --win-card: rgba(255, 255, 255, 0.7);
    
    /* Text Colors */
    --win-text-primary: #1a1a1a;
    --win-text-secondary: #616161;
    --win-text-disabled: #a0a0a0;
    --win-text-on-accent: #ffffff;
    
    /* Border & Dividers */
    --win-border: rgba(0, 0, 0, 0.0578);
    --win-border-strong: rgba(0, 0, 0, 0.1);
    --win-divider: rgba(0, 0, 0, 0.08);
    
    /* Shadows - Fluent Design */
    --win-shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04), 0 1px 2px rgba(0, 0, 0, 0.06);
    --win-shadow: 0 8px 16px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.06);
    --win-shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.12), 0 4px 8px rgba(0, 0, 0, 0.08);
    --win-shadow-flyout: 0 8px 32px rgba(0, 0, 0, 0.14), 0 2px 8px rgba(0, 0, 0, 0.08);
    
    /* Border Radius - Windows 11 */
    --win-radius-sm: 4px;
    --win-radius: 8px;
    --win-radius-lg: 12px;
    --win-radius-xl: 16px;
    
    /* Transitions */
    --win-transition-fast: 0.1s ease;
    --win-transition: 0.2s ease;
    --win-transition-slow: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Spacing */
    --win-space-xs: 4px;
    --win-space-sm: 8px;
    --win-space-md: 12px;
    --win-space-lg: 16px;
    --win-space-xl: 24px;
    --win-space-2xl: 32px;
    
    /* Typography */
    --win-font: 'Vazirmatn', 'Segoe UI', system-ui, sans-serif;
    --win-font-size-xs: 10px;
    --win-font-size-sm: 12px;
    --win-font-size-base: 14px;
    --win-font-size-lg: 16px;
    --win-font-size-xl: 20px;
    --win-font-size-2xl: 28px;
    --win-font-size-3xl: 40px;
    
    /* Taskbar */
    --taskbar-height: 48px;
}

/* Dark Theme Variables */
[data-theme="dark"] {
    --win-bg-solid: #202020;
    --win-bg-mica: rgba(32, 32, 32, 0.85);
    --win-bg-acrylic: rgba(44, 44, 44, 0.7);
    --win-surface: #2d2d2d;
    --win-surface-hover: #3d3d3d;
    --win-surface-active: #4d4d4d;
    --win-card: rgba(45, 45, 45, 0.7);
    --win-text-primary: #ffffff;
    --win-text-secondary: #c5c5c5;
    --win-text-disabled: #6e6e6e;
    --win-border: rgba(255, 255, 255, 0.0837);
    --win-border-strong: rgba(255, 255, 255, 0.15);
    --win-divider: rgba(255, 255, 255, 0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--win-font);
    font-size: var(--win-font-size-base);
    color: var(--win-text-primary);
    background: var(--win-bg-solid);
    line-height: 1.5;
    direction: rtl;
    min-height: 100vh;
    overflow-x: hidden;
}

/* =============================================
   Desktop Environment
   ============================================= */
.win-desktop {
    position: relative;
    min-height: 100vh;
    background-image: url('wallpapers/default.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.win-desktop::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, 
        rgba(96, 205, 255, 0.1) 0%, 
        rgba(0, 120, 212, 0.05) 50%,
        rgba(134, 97, 193, 0.1) 100%);
    pointer-events: none;
}

/* =============================================
   Mica/Acrylic Effects
   ============================================= */
.win-mica {
    background: var(--win-bg-mica);
    backdrop-filter: blur(50px) saturate(125%);
    -webkit-backdrop-filter: blur(50px) saturate(125%);
}

.win-acrylic {
    background: var(--win-bg-acrylic);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    border: 1px solid var(--win-border);
}

/* =============================================
   Taskbar - Windows 11 Style
   ============================================= */
.win-taskbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--taskbar-height);
    background: var(--win-bg-acrylic);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border-top: 1px solid var(--win-border);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 0 var(--win-space-lg);
}

.taskbar-center {
    display: flex;
    align-items: center;
    gap: var(--win-space-xs);
    background: var(--win-card);
    border-radius: var(--win-radius);
    padding: var(--win-space-xs);
}

.taskbar-item {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
    position: relative;
}

.taskbar-item:hover {
    background: var(--win-surface-hover);
}

.taskbar-item.active {
    background: var(--win-surface-active);
}

.taskbar-item.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    width: 16px;
    height: 3px;
    background: var(--win-accent);
    border-radius: 2px;
}

.taskbar-item .icon {
    font-size: 20px;
}

.taskbar-start {
    background: transparent;
}

.taskbar-start:hover {
    background: var(--win-surface-hover);
}

.taskbar-right {
    position: absolute;
    left: var(--win-space-lg);
    display: flex;
    align-items: center;
    gap: var(--win-space-sm);
}

.taskbar-left {
    position: absolute;
    right: var(--win-space-lg);
    display: flex;
    align-items: center;
    gap: var(--win-space-md);
}

.system-tray {
    display: flex;
    align-items: center;
    gap: var(--win-space-sm);
    padding: var(--win-space-xs) var(--win-space-md);
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
}

.system-tray:hover {
    background: var(--win-surface-hover);
}

.system-time {
    text-align: center;
    font-size: var(--win-font-size-sm);
    line-height: 1.3;
}

/* =============================================
   Start Menu
   ============================================= */
.win-start-menu {
    position: fixed;
    bottom: calc(var(--taskbar-height) + 12px);
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    width: 640px;
    max-width: calc(100vw - 40px);
    background: var(--win-bg-mica);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border-radius: var(--win-radius-lg);
    border: 1px solid var(--win-border);
    box-shadow: var(--win-shadow-flyout);
    padding: var(--win-space-2xl);
    opacity: 0;
    visibility: hidden;
    transition: var(--win-transition-slow);
    z-index: 10000;
}

.win-start-menu.active {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.start-search {
    position: relative;
    margin-bottom: var(--win-space-xl);
}

.start-search input {
    width: 100%;
    padding: var(--win-space-md) var(--win-space-lg);
    padding-right: 44px;
    background: var(--win-surface);
    border: 1px solid var(--win-border-strong);
    border-radius: var(--win-radius);
    font-family: inherit;
    font-size: var(--win-font-size-base);
    color: var(--win-text-primary);
    transition: var(--win-transition);
}

.start-search input:focus {
    outline: none;
    border-color: var(--win-accent);
    box-shadow: 0 0 0 1px var(--win-accent);
}

.start-search .search-icon {
    position: absolute;
    right: var(--win-space-md);
    top: 50%;
    transform: translateY(-50%);
    color: var(--win-text-secondary);
}

.start-section-title {
    font-size: var(--win-font-size-base);
    font-weight: 600;
    color: var(--win-text-primary);
    margin-bottom: var(--win-space-md);
}

.start-pinned-apps {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: var(--win-space-xs);
    margin-bottom: var(--win-space-xl);
}

.pinned-app {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--win-space-xs);
    padding: var(--win-space-md);
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
    text-decoration: none;
    color: inherit;
}

.pinned-app:hover {
    background: var(--win-surface-hover);
}

.pinned-app .app-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
}

.pinned-app .app-name {
    font-size: var(--win-font-size-sm);
    text-align: center;
    color: var(--win-text-primary);
}

.start-recommended {
    border-top: 1px solid var(--win-divider);
    padding-top: var(--win-space-xl);
}

.recommended-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--win-space-xs);
}

.recommended-item {
    display: flex;
    align-items: center;
    gap: var(--win-space-md);
    padding: var(--win-space-md);
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
    text-decoration: none;
    color: inherit;
}

.recommended-item:hover {
    background: var(--win-surface-hover);
}

.recommended-item .item-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--win-surface);
    border-radius: var(--win-radius);
    font-size: 20px;
}

.recommended-item .item-info h4 {
    font-size: var(--win-font-size-base);
    font-weight: 500;
    margin-bottom: 2px;
}

.recommended-item .item-info span {
    font-size: var(--win-font-size-sm);
    color: var(--win-text-secondary);
}

.start-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--win-space-xl);
    padding-top: var(--win-space-lg);
    border-top: 1px solid var(--win-divider);
}

.start-user {
    display: flex;
    align-items: center;
    gap: var(--win-space-md);
    padding: var(--win-space-sm) var(--win-space-md);
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
}

.start-user:hover {
    background: var(--win-surface-hover);
}

.start-user .avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--win-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
}

.start-power {
    padding: var(--win-space-sm);
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
}

.start-power:hover {
    background: var(--win-surface-hover);
}

/* =============================================
   Windows (Dialogs/Modals)
   ============================================= */
.win-window {
    position: fixed;
    background: var(--win-bg-mica);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border-radius: var(--win-radius-lg);
    border: 1px solid var(--win-border);
    box-shadow: var(--win-shadow-lg);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    z-index: 1000;
}

.win-window.maximized {
    inset: 0;
    border-radius: 0;
}

.window-titlebar {
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--win-space-md);
    background: transparent;
    -webkit-app-region: drag;
}

.window-title {
    font-size: var(--win-font-size-sm);
    color: var(--win-text-primary);
    display: flex;
    align-items: center;
    gap: var(--win-space-sm);
}

.window-controls {
    display: flex;
    -webkit-app-region: no-drag;
}

.window-control {
    width: 46px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--win-transition-fast);
}

.window-control:hover {
    background: var(--win-surface-hover);
}

.window-control.close:hover {
    background: #c42b1c;
    color: white;
}

.window-content {
    flex: 1;
    overflow: auto;
    padding: var(--win-space-xl);
}

/* =============================================
   Cards - Fluent Design
   ============================================= */
.win-card {
    background: var(--win-card);
    backdrop-filter: blur(20px);
    border-radius: var(--win-radius-lg);
    border: 1px solid var(--win-border);
    padding: var(--win-space-xl);
    transition: var(--win-transition);
}

.win-card:hover {
    box-shadow: var(--win-shadow);
    border-color: var(--win-border-strong);
}

.win-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--win-space-lg);
}

.win-card-title {
    font-size: var(--win-font-size-lg);
    font-weight: 600;
    color: var(--win-text-primary);
}

/* =============================================
   Buttons - Windows 11 Style
   ============================================= */
.win-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--win-space-sm);
    padding: var(--win-space-sm) var(--win-space-lg);
    min-height: 32px;
    background: var(--win-surface);
    border: 1px solid var(--win-border-strong);
    border-radius: var(--win-radius);
    font-family: inherit;
    font-size: var(--win-font-size-base);
    color: var(--win-text-primary);
    cursor: pointer;
    transition: var(--win-transition-fast);
}

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

.win-btn:active {
    background: var(--win-surface-active);
    transform: scale(0.98);
}

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

.win-btn-accent:hover {
    background: var(--win-accent-dark);
    border-color: var(--win-accent-dark);
}

.win-btn-lg {
    padding: var(--win-space-md) var(--win-space-xl);
    min-height: 40px;
    font-size: var(--win-font-size-lg);
}

.win-btn-icon {
    padding: var(--win-space-sm);
    min-height: auto;
    width: 32px;
    height: 32px;
}

/* =============================================
   Inputs - Windows 11 Style
   ============================================= */
.win-input {
    width: 100%;
    padding: var(--win-space-sm) var(--win-space-md);
    min-height: 32px;
    background: var(--win-surface);
    border: 1px solid var(--win-border-strong);
    border-bottom: 2px solid var(--win-text-secondary);
    border-radius: var(--win-radius-sm) var(--win-radius-sm) 0 0;
    font-family: inherit;
    font-size: var(--win-font-size-base);
    color: var(--win-text-primary);
    transition: var(--win-transition);
}

.win-input:hover {
    background: var(--win-surface-hover);
}

.win-input:focus {
    outline: none;
    border-bottom-color: var(--win-accent);
    background: var(--win-surface);
}

.win-input::placeholder {
    color: var(--win-text-secondary);
}

/* =============================================
   Widget Panel
   ============================================= */
.win-widgets {
    position: fixed;
    right: 0;
    top: 0;
    bottom: var(--taskbar-height);
    width: 400px;
    background: var(--win-bg-mica);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border-left: 1px solid var(--win-border);
    padding: var(--win-space-xl);
    transform: translateX(100%);
    transition: var(--win-transition-slow);
    z-index: 9000;
    overflow-y: auto;
}

.win-widgets.active {
    transform: translateX(0);
}

.widget-card {
    background: var(--win-card);
    border-radius: var(--win-radius-lg);
    border: 1px solid var(--win-border);
    padding: var(--win-space-lg);
    margin-bottom: var(--win-space-lg);
}

.widget-card h3 {
    font-size: var(--win-font-size-base);
    font-weight: 600;
    margin-bottom: var(--win-space-md);
    display: flex;
    align-items: center;
    gap: var(--win-space-sm);
}

/* =============================================
   Main Content Area
   ============================================= */
.win-main {
    padding: var(--win-space-xl);
    padding-bottom: calc(var(--taskbar-height) + var(--win-space-xl));
    min-height: 100vh;
}

.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--win-space-xl);
}

/* =============================================
   Hero Section
   ============================================= */
.win-hero {
    background: linear-gradient(135deg, var(--win-accent) 0%, #8661c1 100%);
    border-radius: var(--win-radius-xl);
    padding: var(--win-space-2xl);
    color: white;
    position: relative;
    overflow: hidden;
}

.win-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 60%);
    animation: heroGlow 10s infinite linear;
}

@keyframes heroGlow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.win-hero h1 {
    font-size: var(--win-font-size-3xl);
    font-weight: 700;
    margin-bottom: var(--win-space-lg);
    position: relative;
}

.win-hero p {
    font-size: var(--win-font-size-lg);
    opacity: 0.9;
    margin-bottom: var(--win-space-xl);
    position: relative;
}

/* =============================================
   AI Chat Widget
   ============================================= */
.ai-chat-widget {
    position: fixed;
    bottom: calc(var(--taskbar-height) + 20px);
    left: 20px;
    width: 380px;
    background: var(--win-bg-mica);
    backdrop-filter: blur(60px) saturate(150%);
    -webkit-backdrop-filter: blur(60px) saturate(150%);
    border-radius: var(--win-radius-lg);
    border: 1px solid var(--win-border);
    box-shadow: var(--win-shadow-flyout);
    overflow: hidden;
    z-index: 8000;
    display: flex;
    flex-direction: column;
    max-height: 500px;
}

.ai-chat-header {
    padding: var(--win-space-lg);
    background: linear-gradient(135deg, var(--win-accent) 0%, #8661c1 100%);
    color: white;
    display: flex;
    align-items: center;
    gap: var(--win-space-md);
}

.ai-chat-header .ai-avatar {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.ai-chat-header h3 {
    font-size: var(--win-font-size-lg);
    font-weight: 600;
}

.ai-chat-messages {
    flex: 1;
    padding: var(--win-space-lg);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--win-space-md);
}

.ai-message {
    max-width: 85%;
    padding: var(--win-space-md);
    border-radius: var(--win-radius);
    font-size: var(--win-font-size-base);
    line-height: 1.6;
}

.ai-message.bot {
    background: var(--win-surface);
    border: 1px solid var(--win-border);
    align-self: flex-start;
    border-bottom-right-radius: var(--win-radius-sm);
}

.ai-message.user {
    background: var(--win-accent);
    color: white;
    align-self: flex-end;
    border-bottom-left-radius: var(--win-radius-sm);
}

.ai-chat-input {
    padding: var(--win-space-lg);
    border-top: 1px solid var(--win-divider);
    display: flex;
    gap: var(--win-space-sm);
}

.ai-chat-input input {
    flex: 1;
}

/* =============================================
   Notification Center
   ============================================= */
.notification-center {
    position: fixed;
    left: 0;
    top: 0;
    bottom: var(--taskbar-height);
    width: 360px;
    background: var(--win-bg-mica);
    backdrop-filter: blur(60px) saturate(150%);
    border-right: 1px solid var(--win-border);
    transform: translateX(-100%);
    transition: var(--win-transition-slow);
    z-index: 9000;
    display: flex;
    flex-direction: column;
}

.notification-center.active {
    transform: translateX(0);
}

.notification-header {
    padding: var(--win-space-xl);
    border-bottom: 1px solid var(--win-divider);
}

.notification-header h2 {
    font-size: var(--win-font-size-xl);
    font-weight: 600;
}

.notification-list {
    flex: 1;
    padding: var(--win-space-lg);
    overflow-y: auto;
}

.notification-item {
    background: var(--win-card);
    border-radius: var(--win-radius);
    padding: var(--win-space-lg);
    margin-bottom: var(--win-space-md);
    border: 1px solid var(--win-border);
}

.notification-item h4 {
    font-size: var(--win-font-size-base);
    font-weight: 600;
    margin-bottom: var(--win-space-xs);
}

.notification-item p {
    font-size: var(--win-font-size-sm);
    color: var(--win-text-secondary);
}

.notification-item time {
    font-size: var(--win-font-size-xs);
    color: var(--win-text-disabled);
    display: block;
    margin-top: var(--win-space-sm);
}

/* Quick Actions */
.quick-actions {
    padding: var(--win-space-lg);
    border-top: 1px solid var(--win-divider);
}

.quick-actions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--win-space-sm);
}

.quick-action {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--win-space-xs);
    background: var(--win-surface);
    border-radius: var(--win-radius);
    cursor: pointer;
    transition: var(--win-transition);
    border: 1px solid transparent;
}

.quick-action:hover {
    background: var(--win-surface-hover);
}

.quick-action.active {
    background: var(--win-accent);
    color: white;
}

.quick-action span {
    font-size: var(--win-font-size-xs);
}

/* =============================================
   Animations
   ============================================= */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

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

.animate-fade { animation: fadeIn 0.3s ease; }
.animate-slide { animation: slideUp 0.3s ease; }
.animate-scale { animation: scaleIn 0.2s ease; }

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 768px) {
    .win-start-menu {
        width: calc(100vw - 20px);
        bottom: calc(var(--taskbar-height) + 10px);
    }
    
    .start-pinned-apps {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .recommended-list {
        grid-template-columns: 1fr;
    }
    
    .win-widgets,
    .notification-center {
        width: 100%;
    }
    
    .ai-chat-widget {
        width: calc(100% - 40px);
        left: 20px;
        right: 20px;
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .win-hero h1 {
        font-size: var(--win-font-size-2xl);
    }
}

/* =============================================
   Scrollbar - Windows 11 Style
   ============================================= */
::-webkit-scrollbar {
    width: 14px;
    height: 14px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--win-text-disabled);
    border-radius: 7px;
    border: 4px solid transparent;
    background-clip: padding-box;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--win-text-secondary);
    border: 4px solid transparent;
    background-clip: padding-box;
}