/* ==================== MODERN MESSENGER REDESIGN ==================== */
/* Inspired by Telegram aesthetics, unique aqua/teal palette */

/* ==================== CSS VARIABLES ==================== */
:root {
    /* === PRIMARY COLORS === */
    --primary: #00B8A9;              /* Main teal accent */
    --primary-hover: #00A89A;        /* Darker teal on hover */
    --primary-pressed: #00988A;      /* Even darker when pressed */
    --primary-light: #E6F9F7;        /* Very light teal background */
    --primary-alpha-10: rgba(0, 184, 169, 0.1);
    --primary-alpha-20: rgba(0, 184, 169, 0.2);
    
    /* === SECONDARY COLORS === */
    --secondary: #00D4C5;            /* Bright aqua */
    --accent-blue: #0088CC;          /* Optional blue accent */
    --accent-green: #34C759;         /* Success green */
    --accent-orange: #FF9500;        /* Warning orange */
    --accent-red: #FF3B30;           /* Error red */
    
    /* === NEUTRAL COLORS === */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;
    --black: #000000;
    
    /* === SEMANTIC COLORS === */
    --bg-page: var(--gray-50);
    --bg-sidebar: var(--white);
    --bg-chat: var(--white);
    --bg-header: var(--white);
    --bg-panel: var(--white);
    --bg-input: var(--gray-100);
    --bg-hover: var(--gray-100);
    --bg-active: var(--gray-200);
    --bg-message-in: var(--white);
    --bg-message-out: var(--primary-light);
    
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-500);
    --text-tertiary: var(--gray-400);
    --text-hint: var(--gray-300);
    --text-link: var(--primary);
    
    --border-light: var(--gray-200);
    --border-medium: var(--gray-300);
    --divider: var(--gray-200);
    
    /* === SHADOWS === */
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* === TYPOGRAPHY === */
    --font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 11px;
    --font-size-sm: 13px;
    --font-size-base: 15px;
    --font-size-lg: 17px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    --line-height-tight: 1.25;
    --line-height-normal: 1.5;
    --line-height-relaxed: 1.75;
    
    /* === SPACING === */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    
    /* === BORDER RADIUS === */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-full: 9999px;
    
    /* === TRANSITIONS === */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 200ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* === Z-INDEX === */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* === DARK THEME === */
[data-theme="dark"] {
    --primary: #00CDB8;
    --primary-hover: #00BDA9;
    --primary-pressed: #00AD9A;
    --primary-light: #0D2E2C;
    --primary-alpha-10: rgba(0, 205, 184, 0.1);
    --primary-alpha-20: rgba(0, 205, 184, 0.2);
    
    --secondary: #00E4D4;
    --accent-green: #32D74B;
    --accent-orange: #FF9F0A;
    --accent-red: #FF453A;
    
    --white: #000000;
    --gray-50: #1C1C1E;
    --gray-100: #2C2C2E;
    --gray-200: #3A3A3C;
    --gray-300: #48484A;
    --gray-400: #636366;
    --gray-500: #8E8E93;
    --gray-600: #AEAEB2;
    --gray-700: #C7C7CC;
    --gray-800: #D1D1D6;
    --gray-900: #F2F2F7;
    --black: #FFFFFF;
    
    --bg-page: #000000;
    --bg-sidebar: #1C1C1E;
    --bg-chat: #000000;
    --bg-header: #1C1C1E;
    --bg-panel: #1C1C1E;
    --bg-input: #2C2C2E;
    --bg-hover: #2C2C2E;
    --bg-active: #3A3A3C;
    --bg-message-in: #1C1C1E;
    --bg-message-out: #0D2E2C;
    
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-500);
    --text-tertiary: var(--gray-400);
    --text-hint: var(--gray-300);
    
    --border-light: #2C2C2E;
    --border-medium: #3A3A3C;
    --divider: #2C2C2E;
    
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.4), 0 1px 2px 0 rgba(0, 0, 0, 0.24);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.24);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.4), 0 10px 10px -5px rgba(0, 0, 0, 0.16);
}

/* ==================== RESET & BASE ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

*,
*::before,
*::after {
    transition-property: background-color, border-color, color, fill, stroke, opacity, box-shadow, transform;
    transition-duration: var(--transition-base);
    transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-normal);
    color: var(--text-primary);
    background: var(--bg-page);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow: hidden;
}

/* Disable transitions during theme switching */
.theme-switching,
.theme-switching * {
    transition: none !important;
}

/* ==================== SCROLLBARS ==================== */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--gray-400);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: var(--gray-600);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb:hover {
    background: var(--gray-500);
}

/* ==================== AUTH SCREEN ==================== */
.auth-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    padding: var(--spacing-6);
}

.auth-container {
    width: 100%;
    max-width: 420px;
}

.auth-card {
    background: var(--bg-panel);
    border-radius: var(--radius-xl);
    padding: var(--spacing-10);
    box-shadow: var(--shadow-xl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-8);
}

.logo {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-6);
    background: var(--primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.logo .material-icons {
    font-size: 40px;
    color: var(--white);
}

.auth-header h1 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

.auth-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
}

.input-group {
    margin-bottom: var(--spacing-5);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-2);
    font-weight: var(--font-weight-medium);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.input-group input {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: var(--font-family);
    outline: none;
    transition: all var(--transition-base);
}

.input-group input:focus {
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 3px var(--primary-alpha-10);
}

.btn-primary {
    width: 100%;
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    font-family: var(--font-family);
    position: relative;
    overflow: hidden;
    transition: all var(--transition-base);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    background: var(--primary-pressed);
    transform: translateY(0);
}

/* Ripple effect */
.btn-primary::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:active::after {
    width: 300px;
    height: 300px;
}

.auth-switch {
    text-align: center;
    margin-top: var(--spacing-6);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.auth-switch a {
    color: var(--primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    transition: color var(--transition-base);
}

.auth-switch a:hover {
    color: var(--primary-hover);
}

/* ==================== MAIN APP LAYOUT ==================== */
.main-app {
    display: flex;
    height: 100vh;
    background: var(--bg-page);
}

/* ==================== SIDEBAR ==================== */
.sidebar {
    width: 380px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    position: relative;
}

/* Sidebar Toggle */
.sidebar-toggle-btn {
    position: absolute;
    right: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 48px;
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-sticky);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-sm);
}

.sidebar-toggle-btn:hover {
    background: var(--bg-hover);
    width: 28px;
}

.sidebar-toggle-btn .material-icons {
    font-size: 18px;
    color: var(--text-secondary);
    transition: transform var(--transition-base);
}

.sidebar.collapsed {
    width: 72px;
    min-width: 72px;
}

.sidebar.collapsed .sidebar-toggle-btn .material-icons {
    transform: rotate(180deg);
}

/* Collapsed state */
.sidebar.collapsed .user-info,
.sidebar.collapsed #newChatBtn,
.sidebar.collapsed .tab-btn span:not(.material-icons),
.sidebar.collapsed .sidebar-search input,
.sidebar.collapsed .chat-details {
    display: none;
}

.sidebar.collapsed .sidebar-header {
    padding: var(--spacing-2);
    justify-content: center;
}

.sidebar.collapsed .user-profile {
    width: 40px;
    justify-content: center;
    padding: 0;
}

.sidebar.collapsed .sidebar-tabs {
    flex-direction: column;
    gap: var(--spacing-1);
    padding: var(--spacing-2);
}

.sidebar.collapsed .tab-btn {
    flex-direction: column;
    padding: var(--spacing-3);
    border-bottom: none;
    border-left: 3px solid transparent;
    border-radius: var(--radius-sm);
}

.sidebar.collapsed .tab-btn.active {
    border-left-color: var(--primary);
    background: var(--bg-active);
}

.sidebar.collapsed .sidebar-search {
    padding: var(--spacing-2);
}

.sidebar.collapsed .sidebar-search .material-icons {
    position: static;
    transform: none;
    cursor: pointer;
    padding: var(--spacing-2);
    border-radius: var(--radius-sm);
}

.sidebar.collapsed .chat-item,
.sidebar.collapsed .contact-item {
    padding: var(--spacing-3);
    flex-direction: column;
    align-items: center;
}

/* Tooltips for collapsed sidebar */
.sidebar.collapsed [data-tooltip] {
    position: relative;
}

.sidebar.collapsed [data-tooltip]:hover::after {
    content: attr(data-tooltip);
    position: absolute;
    left: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-left: var(--spacing-3);
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--gray-800);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    z-index: var(--z-tooltip);
    box-shadow: var(--shadow-md);
    pointer-events: none;
    animation: tooltipFadeIn 0.2s;
}

@keyframes tooltipFadeIn {
    from {
        opacity: 0;
        transform: translateY(-50%) translateX(-4px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

/* Sidebar Header */
.sidebar-header {
    height: 64px;
    padding: var(--spacing-3) var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}

.user-profile {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex: 1;
    cursor: pointer;
    padding: var(--spacing-2);
    margin: calc(var(--spacing-2) * -1);
    border-radius: var(--radius-md);
    transition: background var(--transition-base);
}

.user-profile:hover {
    background: var(--bg-hover);
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    flex-shrink: 0;
    overflow: initial;
    position: relative;
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.user-avatar.online::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 12px;
    height: 12px;
    background: var(--accent-green);
    border: 2px solid var(--bg-sidebar);
    border-radius: var(--radius-full);
}

.user-info h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
}

.user-status {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-tight);
}

.user-status.online {
    color: var(--primary);
}

.icon-btn {
    width: 40px;
    height: 40px;
    border: none;
    background: transparent;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all var(--transition-base);
    position: relative;
    overflow: initial;
}

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

.icon-btn:active {
    background: var(--bg-active);
}

.icon-btn .material-icons {
    font-size: 22px;
}

/* Ripple effect for icon buttons */
.icon-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.1;
    transform: translate(-50%, -50%);
    transition: width 0.4s, height 0.4s;
}

.icon-btn:active::before {
    width: 100px;
    height: 100px;
}

/* Sidebar Tabs */
.sidebar-tabs {
    display: flex;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}

.tab-btn {
    flex: 1;
    padding: var(--spacing-3) var(--spacing-4);
    border: none;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-2);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    border-bottom: 2px solid transparent;
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

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

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-btn .material-icons {
    font-size: 20px;
}

/* Search Bar */
.sidebar-search {
    padding: var(--spacing-2) var(--spacing-3);
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
    position: relative;
}

.sidebar-search input {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3) var(--spacing-2) 44px;
    border: none;
    outline: none;
    background: var(--bg-input);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

.sidebar-search input::placeholder {
    color: var(--text-tertiary);
}

.sidebar-search input:focus {
    background: var(--white);
    box-shadow: 0 0 0 2px var(--primary-alpha-10);
}

.sidebar-search .material-icons {
    position: absolute;
    left: calc(var(--spacing-3) + var(--spacing-3));
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    font-size: 20px;
    pointer-events: none;
}

/* Sidebar Content */
.sidebar-content {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* Chat/Contact Items */
.chat-item,
.contact-item {
    padding: var(--spacing-3) var(--spacing-4);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
    border-bottom: 1px solid var(--divider);
    background: var(--bg-sidebar);
    position: relative;
    transition: all var(--transition-base);
}

.chat-item:hover,
.contact-item:hover {
    background: var(--bg-hover);
}

.chat-item.active {
    background: var(--primary-alpha-10);
}

.chat-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--primary);
}

.chat-avatar,
.contact-avatar {
    width: 52px;
    height: 52px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    flex-shrink: 0;
    position: relative;
    overflow: initial;
}

.chat-avatar img,
.contact-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-avatar.online::after,
.contact-avatar.online::after {
    content: '';
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 14px;
    height: 14px;
    background: var(--accent-green);
    border: 3px solid var(--bg-sidebar);
    border-radius: var(--radius-full);
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.1);
}

.chat-details {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
}

.chat-header-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--spacing-2);
}

.chat-name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.chat-time {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    flex-shrink: 0;
}

.chat-preview {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.unread-badge {
    background: var(--primary);
    color: var(--white);
    min-width: 20px;
    height: 20px;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    padding: 0 var(--spacing-2);
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* ==================== CHAT AREA ==================== */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-chat);
    position: relative;
    min-width: 0;
}

/* Welcome Screen */
.welcome-screen {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-panel);
}

.welcome-content {
    text-align: center;
    max-width: 480px;
    padding: var(--spacing-10);
}

.welcome-content .material-icons {
    font-size: 96px;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-6);
    opacity: 0.3;
}

.welcome-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-3);
    color: var(--text-primary);
}

.welcome-content p {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-6);
    line-height: var(--line-height-relaxed);
}

/* Chat Container */
.chat-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

/* Chat Header */
.chat-header {
    height: 64px;
    padding: var(--spacing-3) var(--spacing-4);
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
    backdrop-filter: blur(8px);
}

.chat-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex: 1;
    min-width: 0;
    cursor: pointer;
    padding: var(--spacing-2);
    margin: calc(var(--spacing-2) * -1);
    border-radius: var(--radius-md);
    transition: background var(--transition-base);
}

.chat-info:hover {
    background: var(--bg-hover);
}

.chat-header .chat-avatar {
    width: 40px;
    height: 40px;
}

.chat-info > div {
    min-width: 0;
}

.chat-info h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: var(--line-height-tight);
}

.chat-info .chat-status {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-tight);
}

.chat-status.online {
    color: var(--primary);
}

.chat-actions {
    display: flex;
    gap: var(--spacing-1);
    align-items: center;
}

/* ==================== MESSAGES ==================== */
.messages-container {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding: var(--spacing-5) var(--spacing-6);
    background: var(--bg-chat);
}

.messages-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2);
}

.message {
    display: flex;
    align-items: flex-end;
    gap: var(--spacing-2);
    max-width: 70%;
    animation: messageSlideIn 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

.message.sent {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message.received {
    align-self: flex-start;
}

.message.system {
    align-self: center;
    max-width: 80%;
}

.message-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    flex-shrink: 0;
    overflow: hidden;
}

.message-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.message-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    max-width: 100%;
}

.message-sender-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--primary);
    padding: 0 var(--spacing-3);
    cursor: pointer;
}

.message-sender-name:hover {
    opacity: 0.8;
}

.message-bubble {
    padding: var(--spacing-2) var(--spacing-3);
    border-radius: var(--radius-lg);
    word-wrap: break-word;
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--text-primary);
    position: relative;
    box-shadow: var(--shadow-xs);
    transition: all var(--transition-base);
}

.message:hover .message-bubble {
    box-shadow: var(--shadow-sm);
}

.message.received .message-bubble {
    background: var(--bg-message-in);
    border-top-left-radius: var(--radius-sm);
}

.message.sent .message-bubble {
    background: var(--bg-message-out);
    border-top-right-radius: var(--radius-sm);
}

.message.system .message-bubble {
    background: var(--bg-hover);
    text-align: center;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    padding: var(--spacing-2) var(--spacing-4);
    box-shadow: none;
}

.message-time {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
    padding: 0 var(--spacing-3);
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
}

.message.sent .message-time {
    justify-content: flex-end;
}

/* Message status (Telegram-style) */
.message-status {
    font-size: 14px;
    line-height: 1;
    font-weight: bold;
    transition: color var(--transition-base);
}

.message-status.sending {
    color: var(--text-tertiary);
}

.message-status.sent {
    color: var(--text-hint);
}

.message-status.delivered {
    color: var(--text-secondary);
}

.message-status.read {
    color: var(--primary);
}

/* File attachments */
.message-image img {
    max-width: 320px;
    max-height: 320px;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: block;
    transition: transform var(--transition-base);
}

.message-image img:hover {
    transform: scale(1.02);
}

.message-video video {
    max-width: 400px;
    max-height: 400px;
    border-radius: var(--radius-md);
}

.message-file {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    padding: var(--spacing-3);
    background: var(--bg-hover);
    border-radius: var(--radius-md);
    cursor: pointer;
    margin-bottom: var(--spacing-1);
    transition: all var(--transition-base);
}

.message-file:hover {
    background: var(--bg-active);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* ==================== TYPING INDICATOR ==================== */
.typing-indicator {
    padding: var(--spacing-3) var(--spacing-6);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    background: var(--bg-chat);
    border-top: 1px solid var(--border-light);
}

.typing-dots {
    display: flex;
    gap: 3px;
}

.typing-dots span {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background: var(--primary);
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dots span:nth-child(1) {
    animation-delay: 0s;
}

.typing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.typing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes typingBounce {
    0%, 60%, 100% {
        transform: translateY(0);
        opacity: 0.5;
    }
    30% {
        transform: translateY(-8px);
        opacity: 1;
    }
}

/* ==================== MESSAGE INPUT ==================== */
.message-input {
    padding: var(--spacing-3) var(--spacing-4);
    background: var(--bg-header);
    border-top: 1px solid var(--border-light);
    display: flex;
    gap: var(--spacing-2);
    align-items: flex-end;
    flex-shrink: 0;
}

.input-wrapper {
    flex: 1;
    background: var(--bg-input);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2) var(--spacing-4);
    display: flex;
    align-items: center;
    min-height: 44px;
    transition: all var(--transition-base);
}

.input-wrapper:focus-within {
    background: var(--white);
    box-shadow: 0 0 0 2px var(--primary-alpha-10);
}

.input-wrapper textarea {
    flex: 1;
    border: none;
    background: transparent;
    resize: none;
    outline: none;
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    color: var(--text-primary);
    max-height: 160px;
    line-height: var(--line-height-normal);
}

.input-wrapper textarea::placeholder {
    color: var(--text-tertiary);
}

.btn-send {
    width: 44px;
    height: 44px;
    border: none;
    border-radius: var(--radius-full);
    background: var(--primary);
    color: var(--white);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.btn-send:hover {
    background: var(--primary-hover);
    transform: scale(1.05);
}

.btn-send:active {
    background: var(--primary-pressed);
    transform: scale(0.95);
}

.btn-send .material-icons {
    font-size: 20px;
}

/* Ripple for send button */
.btn-send::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-send:active::before {
    width: 200px;
    height: 200px;
}

/* ==================== ATTACH MENU ==================== */
.attach-menu {
    position: absolute;
    bottom: 70px;
    left: var(--spacing-6);
    background: var(--bg-panel);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-2);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-1);
    z-index: var(--z-dropdown);
    animation: slideUp 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-light);
}

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

.attach-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    cursor: pointer;
    padding: var(--spacing-3) var(--spacing-4);
    border-radius: var(--radius-md);
    min-width: 220px;
    transition: background var(--transition-base);
}

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

.attach-icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.attach-icon .material-icons {
    font-size: 22px;
}

.attach-item span {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: var(--font-weight-medium);
}

/* ==================== FILE PREVIEW ==================== */
.file-preview {
    background: var(--bg-header);
    border-top: 1px solid var(--border-light);
    padding: var(--spacing-3) var(--spacing-4);
}

.file-preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-3);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--text-secondary);
}

.file-preview-list {
    display: flex;
    gap: var(--spacing-3);
    overflow-x: auto;
    padding-bottom: var(--spacing-1);
}

.file-preview-item {
    position: relative;
    flex-shrink: 0;
}

.file-preview-item.image {
    width: 80px;
    height: 80px;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-panel);
}

.file-preview-item.image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.file-preview-item.document {
    width: 200px;
    padding: var(--spacing-3);
    background: var(--bg-panel);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
}

.file-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.file-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
}

.file-icon .material-icons {
    font-size: 20px;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.file-size {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.file-remove {
    position: absolute;
    top: var(--spacing-1);
    right: var(--spacing-1);
    width: 22px;
    height: 22px;
    background: rgba(0, 0, 0, 0.7);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    transition: opacity var(--transition-base);
}

.file-preview-item:hover .file-remove {
    opacity: 1;
}

.file-remove .material-icons {
    font-size: 14px;
    color: var(--white);
}

/* ==================== EMOJI PICKER ==================== */
.emoji-picker {
    position: absolute;
    bottom: 70px;
    right: 120px;
    width: 352px;
    height: 420px;
    background: var(--bg-panel);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    display: flex;
    flex-direction: column;
    z-index: var(--z-popover);
    animation: slideUp 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--border-light);
}

.emoji-picker-header {
    padding: var(--spacing-3);
    border-bottom: 1px solid var(--divider);
}

.emoji-picker-header input {
    width: 100%;
    padding: var(--spacing-2) var(--spacing-3);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: var(--font-family);
    outline: none;
    transition: all var(--transition-base);
}

.emoji-picker-header input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-alpha-10);
}

.emoji-categories {
    display: flex;
    gap: var(--spacing-1);
    padding: var(--spacing-2) var(--spacing-3);
    border-bottom: 1px solid var(--divider);
    overflow-x: auto;
}

.emoji-category {
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    font-size: 20px;
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition-base);
}

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

.emoji-category.active {
    background: var(--bg-active);
}

.emoji-list {
    flex: 1;
    padding: var(--spacing-2);
    overflow-y: auto;
    display: grid;
    grid-template-columns: repeat(9, 1fr);
    gap: var(--spacing-1);
    align-content: start;
}

.emoji-item {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.emoji-item:hover {
    background: var(--bg-hover);
    transform: scale(1.15);
}

/* ==================== MODALS ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    backdrop-filter: blur(4px);
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--bg-panel);
    border-radius: var(--radius-xl);
    padding: 0;
    max-width: 540px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: scale(0.9) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-5) var(--spacing-6);
    border-bottom: 1px solid var(--divider);
}

.modal-header h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.modal-body {
    padding: var(--spacing-6);
}

.modal-footer {
    padding: var(--spacing-4) var(--spacing-6);
    border-top: 1px solid var(--divider);
    display: flex;
    gap: var(--spacing-3);
    justify-content: flex-end;
}

.btn-secondary {
    padding: var(--spacing-2) var(--spacing-5);
    border: 1px solid var(--border-medium);
    border-radius: var(--radius-md);
    background: transparent;
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

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

.btn-secondary:active {
    background: var(--bg-active);
}

/* ==================== TOAST NOTIFICATIONS ==================== */
.toast-container {
    position: fixed;
    bottom: var(--spacing-6);
    left: 50%;
    transform: translateX(-50%);
    z-index: var(--z-tooltip);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    pointer-events: none;
}

.toast {
    background: var(--gray-800);
    color: var(--white);
    padding: var(--spacing-3) var(--spacing-5);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    animation: toastSlideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: auto;
    min-width: 300px;
}

@keyframes toastSlideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toast.error {
    background: var(--accent-red);
}

.toast.success {
    background: var(--accent-green);
}

.toast.warning {
    background: var(--accent-orange);
}

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

.toast .material-icons {
    font-size: 22px;
}

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

/* Material Icons sizing */
.material-icons {
    font-feature-settings: 'liga';
    -webkit-font-smoothing: antialiased;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .sidebar {
        width: 340px;
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: absolute;
        left: 0;
        top: 0;
        bottom: 0;
        z-index: var(--z-fixed);
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .message {
        max-width: 85%;
    }
    
    .messages-container {
        padding: var(--spacing-3) var(--spacing-4);
    }
}

/* ==================== TASKS MODULE ==================== */
.tasks-container {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-page);
    overflow: hidden;
}

.tasks-header {
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-light);
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-4);
    flex-wrap: wrap;
    flex-shrink: 0;
}

.tasks-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
}

.tasks-header h2 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.view-toggle {
    display: flex;
    gap: var(--spacing-1);
    background: var(--bg-input);
    padding: var(--spacing-1);
    border-radius: var(--radius-md);
}

.view-toggle-btn {
    padding: var(--spacing-2) var(--spacing-3);
    border: none;
    background: transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

.view-toggle-btn:hover {
    background: var(--bg-hover);
}

.view-toggle-btn.active {
    background: var(--white);
    color: var(--primary);
    box-shadow: var(--shadow-xs);
}

.tasks-filters {
    display: flex;
    gap: var(--spacing-2);
    flex-wrap: wrap;
}

.filter-btn {
    padding: var(--spacing-2) var(--spacing-4);
    border: 1px solid var(--border-light);
    background: var(--white);
    border-radius: var(--radius-lg);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

.filter-btn:hover {
    background: var(--bg-hover);
    border-color: var(--border-medium);
}

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

.create-task-btn {
    padding: var(--spacing-2) var(--spacing-5);
    background: var(--primary);
    color: var(--white);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

.create-task-btn:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* Kanban Board */
.kanban-board {
    display: flex;
    gap: var(--spacing-4);
    padding: var(--spacing-5);
    overflow-x: auto;
    flex: 1;
    align-items: flex-start;
}

.kanban-column {
    min-width: 300px;
    max-width: 300px;
    display: flex;
    flex-direction: column;
    background: var(--bg-panel);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    flex-shrink: 0;
    max-height: calc(100vh - 200px);
}

.kanban-column-header {
    padding: var(--spacing-4);
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.kanban-column-header h3 {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
}

.task-count {
    background: var(--bg-hover);
    color: var(--text-secondary);
    padding: 2px var(--spacing-2);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
}

.kanban-column-content {
    padding: var(--spacing-3);
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3);
    min-height: 100px;
}

/* Task Card */
.task-card {
    background: var(--white);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-3);
    cursor: pointer;
    position: relative;
    transition: all var(--transition-base);
}

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

.task-priority-indicator {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.task-priority-indicator.high {
    background: var(--accent-orange);
}

.task-priority-indicator.urgent {
    background: var(--accent-red);
}

.task-card-header {
    display: flex;
    align-items: start;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
}

.task-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
    flex: 1;
}

.task-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-3);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.task-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-3);
}

.task-department {
    background: var(--primary-alpha-10);
    color: var(--primary);
    padding: 4px var(--spacing-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
}

.task-due-date {
    display: flex;
    align-items: center;
    gap: var(--spacing-1);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.task-due-date.urgent {
    color: var(--accent-red);
    font-weight: var(--font-weight-semibold);
}

.task-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-2);
}

.task-assignee {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.task-avatar {
    width: 24px;
    height: 24px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
}

/* ==================== ADMIN PANEL ==================== */
.admin-container {
    flex: 1;
    display: flex;
    background: var(--bg-page);
    overflow: hidden;
}

.admin-sidebar {
    width: 260px;
    background: var(--bg-sidebar);
    border-right: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
}

.admin-sidebar-header {
    padding: var(--spacing-6) var(--spacing-5);
    border-bottom: 1px solid var(--border-light);
    background: var(--bg-header);
}

.admin-sidebar-header h2 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
}

.admin-sidebar-header .material-icons {
    font-size: 28px;
    color: var(--primary);
}

.admin-nav {
    flex: 1;
    padding: var(--spacing-4) 0;
    overflow-y: auto;
}

.admin-nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    padding: var(--spacing-3) var(--spacing-5);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-base);
    border-left: 3px solid transparent;
}

.admin-nav-item:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
}

.admin-nav-item.active {
    background: var(--primary-alpha-10);
    color: var(--primary);
    border-left-color: var(--primary);
}

.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.admin-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-8);
}

/* Admin Stats Grid */
.admin-stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--spacing-6);
    margin-bottom: var(--spacing-8);
}

.admin-stat-card {
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-6);
    display: flex;
    gap: var(--spacing-5);
    transition: all var(--transition-base);
}

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

.stat-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-value {
    font-size: 32px;
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-2);
}

/* ==================== VIDEO CONFERENCE ==================== */
.conference-panel {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--black);
    z-index: var(--z-modal);
    display: flex;
    flex-direction: column;
}

.conference-header {
    padding: var(--spacing-4) var(--spacing-6);
    background: linear-gradient(to bottom, rgba(0,0,0,0.8) 0%, transparent 100%);
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
}

.conference-info h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--white);
    margin-bottom: var(--spacing-1);
}

.conference-info p {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.7);
}

.conference-grid {
    flex: 1;
    display: grid;
    gap: var(--spacing-4);
    padding: var(--spacing-6);
    align-items: center;
    justify-items: center;
}

.conference-controls {
    padding: var(--spacing-5) var(--spacing-6);
    background: linear-gradient(to top, rgba(0,0,0,0.9) 0%, transparent 100%);
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: center;
    gap: var(--spacing-3);
    z-index: 10;
}

.control-btn {
    width: 52px;
    height: 52px;
    border: none;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all var(--transition-base);
    backdrop-filter: blur(8px);
}

.control-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.end-call-btn {
    background: var(--accent-red);
}

.end-call-btn:hover {
    background: #d32f2f;
}

/* ==================== CHAT INFO PANEL ==================== */
.chat-info-panel {
    position: fixed;
    top: 0;
    right: -420px;
    width: 420px;
    height: 100vh;
    background: var(--bg-panel);
    box-shadow: var(--shadow-xl);
    transition: right var(--transition-base);
    z-index: var(--z-modal);
    overflow-y: auto;
    border-left: 1px solid var(--border-light);
    display: flex;
    flex-direction: column;
}

.chat-info-panel.open {
    right: 0;
}

.chat-info-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    padding: var(--spacing-5) var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-4);
    position: sticky;
    top: 0;
    z-index: 10;
    min-height: 64px;
}

.chat-info-header .icon-btn {
    color: var(--white);
}

.chat-info-header .icon-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.chat-info-header h3 {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    flex: 1;
}

.chat-info-content {
    flex: 1;
    overflow-y: auto;
}

/* Chat Info Avatar Section */
.chat-info-avatar-section {
    text-align: center;
    padding: var(--spacing-8) var(--spacing-6);
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-light);
}

.chat-info-avatar {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-full);
    margin: 0 auto var(--spacing-5);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    font-size: 48px;
    font-weight: var(--font-weight-semibold);
}

.chat-info-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.chat-info-avatar .material-icons {
    font-size: 64px;
}

#chatInfoName {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

#chatInfoStatus {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

#chatInfoStatus.online {
    color: var(--primary);
    font-weight: var(--font-weight-medium);
}

/* Chat Info Sections */
.chat-info-section {
    padding: 0;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--border-light);
}

.chat-info-section h4 {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: var(--spacing-5) var(--spacing-6) var(--spacing-3);
}

.info-item {
    padding: var(--spacing-4) var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-5);
    cursor: pointer;
    transition: background var(--transition-base);
    position: relative;
}

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

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

.info-item::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: var(--spacing-6);
    right: 0;
    height: 1px;
    background: var(--divider);
}

.info-item:last-child::after {
    display: none;
}

.info-item .material-icons {
    color: var(--text-secondary);
    font-size: 24px;
    width: 24px;
    flex-shrink: 0;
}

.info-item span {
    color: var(--text-primary);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    flex: 1;
}

.info-item.danger {
    color: var(--accent-red);
}

.info-item.danger .material-icons,
.info-item.danger span {
    color: var(--accent-red);
}

/* Members Section */
.member-item {
    padding: var(--spacing-3) var(--spacing-6);
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    cursor: pointer;
    transition: background var(--transition-base);
}

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

.member-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-base);
    flex-shrink: 0;
    overflow: initial;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    position: relative;
}

.member-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-full);
}

.member-avatar.online::after {
    content: '';
    position: absolute;
    bottom: 2px;
    right: 2px;
    width: 12px;
    height: 12px;
    background: var(--accent-green);
    border: 2px solid var(--bg-panel);
    border-radius: var(--radius-full);
}

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

.member-name {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.member-status {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: 2px;
}

.member-status.online {
    color: var(--primary);
    font-weight: var(--font-weight-medium);
}

/* ==================== TASKS LIST VIEW ==================== */
.tasks-list {
    padding: var(--spacing-5) var(--spacing-6);
    overflow-y: auto;
    flex: 1;
}

.task-list-item {
    background: var(--bg-panel);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-4);
    margin-bottom: var(--spacing-3);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-4);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.task-list-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
    border-color: var(--primary);
}

.task-list-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: transparent;
    transition: background var(--transition-base);
}

.task-list-item:hover::before {
    background: var(--primary);
}

.task-list-item.completed {
    opacity: 0.6;
}

.task-list-item.completed .task-title {
    text-decoration: line-through;
}

/* Checkbox */
.task-list-checkbox {
    flex-shrink: 0;
    padding-top: 2px;
}

.task-list-checkbox input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary);
}

/* Task content */
.task-list-content {
    flex: 1;
    min-width: 0;
}

.task-list-header {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
}

.task-list-header .task-title {
    flex: 1;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: var(--text-primary);
    line-height: var(--line-height-tight);
}

.task-unread-dot {
    width: 8px;
    height: 8px;
    background: var(--primary);
    border-radius: var(--radius-full);
    flex-shrink: 0;
    margin-top: 6px;
}

/* Task description in list */
.task-list-item .task-description {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: var(--line-height-normal);
    margin-bottom: var(--spacing-3);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* Task meta in list */
.task-list-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    align-items: center;
    margin-bottom: var(--spacing-3);
}

.task-status-badge {
    padding: 4px var(--spacing-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.task-status-badge.todo {
    background: rgba(107, 114, 128, 0.1);
    color: var(--gray-600);
}

.task-status-badge.in_progress {
    background: rgba(0, 136, 204, 0.1);
    color: #0088cc;
}

.task-status-badge.review {
    background: rgba(255, 149, 0, 0.1);
    color: var(--accent-orange);
}

.task-status-badge.done {
    background: var(--primary-alpha-10);
    color: var(--primary);
}

.task-assignee-chip {
    background: var(--bg-hover);
    color: var(--text-primary);
    padding: 4px var(--spacing-3);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-2);
}

.task-assignee-chip .material-icons {
    font-size: 16px;
    color: var(--text-secondary);
}

.task-priority-chip {
    padding: 4px var(--spacing-2);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.task-priority-chip.high {
    background: rgba(255, 149, 0, 0.1);
    color: var(--accent-orange);
}

.task-priority-chip.urgent {
    background: rgba(255, 59, 48, 0.1);
    color: var(--accent-red);
}

.task-priority-chip .material-icons {
    font-size: 14px;
}

/* Task footer in list */
.task-list-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-3);
}

.task-list-footer-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    flex: 1;
    min-width: 0;
}

.task-due-date-chip {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-1);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.task-due-date-chip .material-icons {
    font-size: 16px;
}

.task-due-date-chip.urgent {
    color: var(--accent-red);
    font-weight: var(--font-weight-semibold);
}

.task-due-date-chip.soon {
    color: var(--accent-orange);
    font-weight: var(--font-weight-medium);
}

/* Task actions in list */
.task-list-actions {
    display: flex;
    gap: var(--spacing-1);
    flex-shrink: 0;
}

.task-list-actions .icon-btn {
    width: 32px;
    height: 32px;
}

.task-list-actions .icon-btn .material-icons {
    font-size: 18px;
}

.task-list-actions .badge {
    position: absolute;
    top: -4px;
    right: -4px;
    background: var(--accent-red);
    color: var(--white);
    font-size: var(--font-size-xs);
    padding: 2px 5px;
    border-radius: var(--radius-full);
    font-weight: var(--font-weight-semibold);
    min-width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Empty state for tasks list */
.tasks-empty {
    text-align: center;
    padding: var(--spacing-10) var(--spacing-6);
    color: var(--text-secondary);
}

.tasks-empty .material-icons {
    font-size: 80px;
    opacity: 0.3;
    margin-bottom: var(--spacing-5);
    color: var(--text-tertiary);
}

.tasks-empty h3 {
    font-size: var(--font-size-xl);
    font-weight: var(--font-weight-semibold);
    margin-bottom: var(--spacing-2);
    color: var(--text-primary);
}

.tasks-empty p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

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

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

button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}



.mobile-back-btn {
    display: none !important;
}

/* Показываем только на мобильных */
@media (max-width: 768px) {
    .mobile-back-btn {
        display: flex !important;
        align-items: center;
        justify-content: center;
        width: 40px;
height: 40px;
border: none;
background: transparent;
border-radius: var(--radius-full);
cursor: pointer;
color: var(--text-secondary);
transition: all var(--transition-base);
position: relative;
overflow: hidden;
    }
    
    .mobile-back-btn:hover {
        background: var(--bg-hover);
    }
    
    .mobile-back-btn:active {
        background: var(--bg-active);
    }
    
    .mobile-back-btn .material-icons {
        font-size: 24px;
    }
}