/* CSS Variables for WebOS Theme */
:root {
    /* Colors - Light Theme */
    --bg-primary: #f0f0f0;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e8e8e8;
    --bg-elevated: #ffffff;
    --bg-overlay: rgba(0, 0, 0, 0.1);
    --bg-accent: #0078d4;
    
    --text-primary: #333333;
    --text-secondary: #666666;
    --text-tertiary: #86868b;
    --text-inverse: #ffffff;
    --text-accent: #0078d4;
    
    --border-primary: #d0d0d0;
    --border-secondary: #e5e5e7;
    --border-tertiary: #f2f2f2;
    --border-accent: #0078d4;
    
    --accent-primary: #0078d4;
    --accent-secondary: #106ebe;
    --accent-success: #107c10;
    --accent-warning: #ff8c00;
    --accent-danger: #d13438;
    
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-window: 0 8px 32px rgba(0, 0, 0, 0.3);
    
    --radius-small: 4px;
    --radius-medium: 6px;
    --radius-large: 8px;
    --radius-window: 8px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-xxl: 32px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 11px;
    --font-size-sm: 12px;
    --font-size-md: 14px;
    --font-size-lg: 16px;
    --font-size-xl: 18px;
    --font-size-xxl: 20px;
    --font-size-xxxl: 24px;
    
    --font-weight-light: 300;
    --font-weight-regular: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.2;
    --line-height-normal: 1.4;
    --line-height-relaxed: 1.6;
    
    /* Layout */
    --taskbar-height: 40px;
    --window-header-height: 32px;
    --start-menu-width: 320px;
    --start-menu-height: 480px;
    
    /* Transitions */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.3s ease-out;
    --transition-slow: 0.5s ease-out;
    
    /* Z-index layers */
    --z-desktop: 1;
    --z-window: 10;
    --z-taskbar: 100;
    --z-start-menu: 200;
    --z-context-menu: 300;
    --z-modal: 400;
    --z-notifications: 500;
    --z-loading: 1000;
    
    /* New variables for dark theme */
    --taskbar-bg: rgba(255, 255, 255, 0.95);
    --start-menu-bg: rgba(255, 255, 255, 0.98);
}

/* Dark Theme */
[data-theme="dark"] {
    --bg-primary: #1e1e1e;
    --bg-secondary: #2d2d30;
    --bg-tertiary: #3e3e42;
    --bg-elevated: #2d2d2d;
    --bg-overlay: rgba(0, 0, 0, 0.3);
    --bg-accent: #0078d4;
    
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --text-tertiary: #8e8e93;
    --text-inverse: #1d1d1f;
    --text-accent: #60cdf8;
    
    --border-primary: #404040;
    --border-secondary: #505050;
    --border-tertiary: #3a3a3c;
    --border-accent: #0078d4;
    
    --shadow-small: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-medium: 0 4px 12px rgba(0, 0, 0, 0.4);
    --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-window: 0 8px 32px rgba(0, 0, 0, 0.6);
    
    --taskbar-bg: rgba(45, 45, 48, 0.95);
    --start-menu-bg: rgba(45, 45, 48, 0.98);
}

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

html {
    font-size: 16px;
    height: 100%;
    overflow: hidden;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background: var(--bg-primary);
    height: 100vh;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* Desktop */
.desktop {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: var(--taskbar-height);
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 255, 0.3) 0%, transparent 50%);
    z-index: var(--z-desktop);
    cursor: default;
}

/* Desktop Icons */
.desktop-icons {
    display: grid;
    grid-template-columns: repeat(auto-fill, 80px);
    gap: var(--spacing-lg);
    padding: var(--spacing-xl);
    height: 100%;
    align-content: start;
}

.desktop-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    padding: var(--spacing-sm);
    border-radius: var(--radius-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    position: relative;
}

.desktop-icon:hover {
    background: var(--bg-overlay);
    transform: scale(1.05);
}

.desktop-icon.selected {
    background: var(--bg-accent);
    color: var(--text-inverse);
}

.desktop-icon-icon {
    font-size: 32px;
    margin-bottom: var(--spacing-xs);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.desktop-icon-text {
    display: block;
    width: 72px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    text-align: center;
    margin: 0 auto;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
}

/* Context Menu */
.context-menu {
    position: fixed;
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-medium);
    box-shadow: var(--shadow-large);
    padding: var(--spacing-xs) 0;
    min-width: 180px;
    z-index: var(--z-context-menu);
    display: none;
}

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

.context-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: var(--font-size-sm);
}

.context-menu-item:hover {
    background: var(--bg-overlay);
}

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

.context-menu-separator {
    height: 1px;
    background: var(--border-secondary);
    margin: var(--spacing-xs) 0;
}

/* Taskbar */
.taskbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--taskbar-height);
    background: var(--taskbar-bg);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-primary);
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-sm);
    z-index: var(--z-taskbar);
    box-shadow: 0 -1px 3px rgba(0, 0, 0, 0.1);
}

/* Start Button */
.start-button {
    width: 40px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-accent);
    color: var(--text-inverse);
    border-radius: var(--radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    margin-right: var(--spacing-sm);
}

.start-button:hover {
    background: var(--accent-secondary);
    transform: scale(1.05);
}

.start-button.active {
    background: var(--accent-secondary);
}

/* Taskbar Items */
.taskbar-items {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex: 1;
    overflow-x: auto;
    padding: 0 var(--spacing-sm);
}

.taskbar-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-small);
    cursor: pointer;
    transition: all var(--transition-fast);
    position: relative;
    min-width: 32px;
}

.taskbar-item:hover {
    background: var(--bg-overlay);
}

.taskbar-item.active {
    background: var(--bg-accent);
    color: var(--text-inverse);
}

.taskbar-item-icon {
    font-size: 16px;
}

.taskbar-item-title {
    display: none;
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-elevated);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-small);
    font-size: var(--font-size-xs);
    white-space: nowrap;
    box-shadow: var(--shadow-small);
    margin-bottom: var(--spacing-xs);
}

.taskbar-item:hover .taskbar-item-title {
    display: block;
}

/* System Tray */
.system-tray {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding-left: var(--spacing-sm);
    border-left: 1px solid var(--border-secondary);
}

.tray-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-small);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: var(--font-size-sm);
}

.tray-item:hover {
    background: var(--bg-overlay);
}

.tray-item.clock {
    min-width: 60px;
    padding: 0 var(--spacing-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

/* Start Menu */
.start-menu {
    position: fixed;
    bottom: var(--taskbar-height);
    left: 0;
    width: var(--start-menu-width);
    height: var(--start-menu-height);
    background: var(--start-menu-bg);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-large) var(--radius-large) 0 0;
    box-shadow: var(--shadow-large);
    z-index: var(--z-start-menu);
    display: none;
    flex-direction: column;
    overflow: hidden;
}

.start-menu.show {
    display: flex;
}

.start-menu-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-secondary);
    background: var(--bg-accent);
    color: var(--text-inverse);
}

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

.user-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: var(--font-size-lg);
}

.user-name {
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-md);
}

.user-status {
    font-size: var(--font-size-sm);
    opacity: 0.8;
}

.start-menu-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow-y: auto;
}

.start-menu-section {
    margin-bottom: var(--spacing-xl);
}

.start-menu-section h3 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.start-menu-apps {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.start-menu-app {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: var(--spacing-md);
    border-radius: var(--radius-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
}

.start-menu-app:hover {
    background: var(--bg-overlay);
}

.start-menu-app-icon {
    font-size: 24px;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
}

.start-menu-app-title {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
}

.start-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-medium);
    cursor: pointer;
    transition: background var(--transition-fast);
    font-size: var(--font-size-sm);
}

.start-menu-item:hover {
    background: var(--bg-overlay);
}

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

.start-menu-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid var(--border-secondary);
    background: var(--bg-tertiary);
}

/* Window Container */
.window-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: var(--taskbar-height);
    pointer-events: none;
    z-index: var(--z-window);
}

/* Window */
.window {
    position: absolute;
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-window);
    box-shadow: var(--shadow-window);
    min-width: 300px;
    min-height: 200px;
    pointer-events: all;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    resize: both;
}

.window.minimized {
    display: none;
}

.window.maximized {
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    bottom: var(--taskbar-height) !important;
    width: 100% !important;
    height: 100% !important;
    resize: none;
}

.window-header {
    display: flex;
    align-items: center;
    height: var(--window-header-height);
    background: var(--bg-accent);
    color: var(--text-inverse);
    padding: 0 var(--spacing-sm);
    cursor: move;
    user-select: none;
    position: relative;
}

.window-title {
    flex: 1;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    margin-left: var(--spacing-sm);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

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

.window-control {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 8px;
    transition: all var(--transition-fast);
}

.window-control.minimize {
    background: #ffbd2e;
}

.window-control.maximize {
    background: #28ca42;
}

.window-control.close {
    background: #ff5f57;
}

.window-control:hover {
    filter: brightness(1.1);
}

.window-control.close:hover {
    background: #ff4444;
}

.window-content {
    flex: 1;
    padding: var(--spacing-lg);
    overflow: auto;
    background: var(--bg-secondary);
}

/* Modal Overlay */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-overlay);
    z-index: var(--z-modal);
    display: none;
}

.modal-overlay.show {
    display: block;
}

/* Notifications */
.notifications {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-notifications);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-width: 400px;
}

.notification {
    background: var(--bg-elevated);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-medium);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-medium);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    transform: translateX(100%);
    transition: transform var(--transition-normal);
    max-width: 100%;
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    border-left: 4px solid var(--accent-success);
}

.notification.warning {
    border-left: 4px solid var(--accent-warning);
}

.notification.error {
    border-left: 4px solid var(--accent-danger);
}

.notification.info {
    border-left: 4px solid var(--accent-primary);
}

.notification-icon {
    flex-shrink: 0;
    margin-top: 2px;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.notification-message {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-normal);
}

.notification-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-small);
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

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

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-loading);
    transition: opacity var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
    color: var(--text-primary);
}

.loading-logo {
    font-size: 64px;
    margin-bottom: var(--spacing-lg);
    color: var(--accent-primary);
}

.loading-text {
    font-size: var(--font-size-xxxl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xl);
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--border-secondary);
    border-top: 4px solid var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-lg);
}

.loading-status {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

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

/* Responsive Design */
@media (max-width: 768px) {
    :root {
        --taskbar-height: 50px;
        --start-menu-width: 100vw;
        --start-menu-height: 60vh;
    }
    
    .desktop-icons {
        grid-template-columns: repeat(auto-fill, 60px);
        gap: var(--spacing-md);
        padding: var(--spacing-md);
    }
    
    .desktop-icon {
        width: 60px;
        height: 60px;
    }
    
    .desktop-icon-icon {
        font-size: 24px;
    }
    
    .desktop-icon-text {
        font-size: 10px;
    }
    
    .start-menu {
        width: 100vw;
        height: 60vh;
        border-radius: var(--radius-large) var(--radius-large) 0 0;
    }
    
    .start-menu-apps {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .taskbar-items {
        gap: var(--spacing-sm);
    }
    
    .taskbar-item {
        width: 40px;
        height: 40px;
    }
    
    .tray-item {
        width: 40px;
        height: 40px;
    }
}

@media (max-width: 480px) {
    .desktop-icons {
        grid-template-columns: repeat(auto-fill, 50px);
        gap: var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .desktop-icon {
        width: 50px;
        height: 50px;
    }
    
    .desktop-icon-icon {
        font-size: 20px;
    }
    
    .desktop-icon-text {
        font-size: 9px;
    }
    
    .start-menu-apps {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .notifications {
        right: var(--spacing-sm);
        left: var(--spacing-sm);
        max-width: none;
    }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
*:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

*:focus:not(:focus-visible) {
    outline: none;
}

/* Print styles */
@media print {
    .taskbar,
    .start-menu,
    .context-menu,
    .notifications,
    .loading-screen {
        display: none !important;
    }
    
    .desktop {
        bottom: 0;
    }
    
    .window {
        position: static !important;
        box-shadow: none !important;
        border: 1px solid #000 !important;
    }
}

/* New styles for dark theme */
.loading-screen {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
}

.loading-content {
    color: var(--text-secondary);
}

.loading-logo {
    animation: pulse 2s infinite;
}

.loading-text {
    margin-bottom: 30px;
}

.loading-spinner {
    border-top-color: white;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.icon {
    position: absolute;
    cursor: pointer;
    /* остальные стили наследуются от .desktop-icon */
}

.dragging {
    opacity: .6;
    pointer-events: none;
}