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

:root {
    /* Новая цветовая палитра — неон + тёмный фон */
    --primary-gradient: linear-gradient(135deg, #8B5CF6 0%, #EC4899 100%);
    --secondary-gradient: linear-gradient(135deg, #3B82F6 0%, #8B5CF6 100%);
    --accent-color: #8B5CF6;
    --accent-hover: #7C3AED;
    
    /* Фоны — глубокий чёрный с фиолетовым отливом */
    --bg-primary: #0B0B1E;
    --bg-secondary: #14142B;
    --bg-tertiary: #1E1E3F;
    --bg-card: #1C1C35;
    --bg-hover: #2A2A4A;
    --bg-active: #31315A;
    
    /* Текст — ярче */
    --text-primary: #FFFFFF;
    --text-secondary: #E0E0FF;
    --text-muted: #9A9ACB;
    --text-accent: #C4B5FD;
    
    /* Границы с оттенком */
    --border-color: #2D2D5A;
    --border-light: #40407A;
    
    /* Тени — сильнее, с цветом */
    --shadow-sm: 0 4px 12px rgba(139, 92, 246, 0.2);
    --shadow-md: 0 8px 24px rgba(139, 92, 246, 0.3);
    --shadow-lg: 0 16px 40px rgba(139, 92, 246, 0.4);
    --shadow-glow: 0 0 30px rgba(139, 92, 246, 0.6);
    
    /* Sizes & Spacing (без изменений) */
    --border-radius-sm: 8px;
    --border-radius: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;
}

/* ===== BASE STYLES ===== */
body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    line-height: 1.5;
    font-weight: 400;
    letter-spacing: 0.3px;
}

/* ===== APP LAYOUT ===== */
.app-container {
    display: flex;
    height: 100vh;
    position: relative;
    background: var(--bg-primary);
}

#particles-js {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: linear-gradient(to bottom, #2c2c2c 0%, #0a0a0a 100%);
}

/* ===== SIDEBAR ===== */
.sidebar {
    width: 100%;
    background: rgba(20, 20, 43, 0.85);
    backdrop-filter: blur(12px);
    border-right: 1px solid rgba(139, 92, 246, 0.2);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    z-index: 1000;
    transform: translateX(-100%);
    transition: transform var(--transition-normal);
    box-shadow: var(--shadow-lg);
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    padding-left: var(--spacing-xl);
    padding-right: var(--spacing-xl);
    padding-bottom: 10px;
    padding-top: 10px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(11, 11, 30, 0.8);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    position: relative;
}

.sidebar-header h2 {
    font-size: 1.3rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.4rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
    z-index: 5;
}

.mobile-menu-btn:hover {
    background: var(--bg-hover);
    transform: scale(1.05);
}

.user-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    position: relative;
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background-color var(--transition-fast);
    backdrop-filter: blur(12px);
    background: rgba(28, 28, 53, 0.5);
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.logo {
    width: 44px;
    height: 44px;
    margin-left: 75%;
    border-radius: 15px;
    position: absolute;
}

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

.user-avatar {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid transparent;
    background: linear-gradient(135deg, #8B5CF6, #EC4899) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.user-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: auto;
    background: rgba(28, 28, 53, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(139, 92, 246, 0.4);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) 0;
    min-width: 180px;
    display: none;
    z-index: 10001;
    box-shadow: var(--shadow-lg);
}

.user-menu:hover .dropdown-menu {
    display: block;
    transform: translateX(-15px);
    animation: slideDown 0.2s ease;
}

.dropdown-menu a {
    display: flex;  
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-xl);
    color: var(--text-primary);
    text-decoration: none;
    z-index: 5;
    transition: all var(--transition-fast);
    font-weight: 500;
}

.dropdown-menu a:hover {
    background: var(--bg-hover);
    color: var(--accent-color);
}

/* ===== CHAT LIST ===== */
.chat-list {
    z-index: -11;
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm) 0;
    background: transparent;
}

.chat-item {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    cursor: pointer;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.chat-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--primary-gradient);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
}

.chat-item:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
}

.chat-item:hover::before {
    transform: scaleX(1);
}

.chat-item.active {
    background: var(--bg-active);
    border-left: 3px solid var(--accent-color);
    z-index: 4;
    box-shadow: var(--shadow-glow);
}

.chat-item.active::before {
    transform: scaleX(1);
}

.chat-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-lg);
    font-size: 1.3rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.chat-item:hover .chat-avatar {
    transform: scale(1.15) rotate(5deg);
    box-shadow: var(--shadow-glow);
}

.chat-avatar img {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    object-fit: cover;
}

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

.chat-name {
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 1rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    letter-spacing: -0.3px;
}

.last-message {
    font-size: 0.9rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    font-weight: 400;
}

.chat-time {
    font-size: 0.8rem;
    color: var(--text-muted);
    flex-shrink: 0;
    margin-left: var(--spacing-md);
    font-weight: 500;
}

.new-chat-btn {
    margin: 20px 20px 70px 20px;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 1rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.new-chat-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

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

.new-chat-btn:hover::before {
    left: 100%;
}

/* ===== MAIN CONTENT ===== */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    padding: var(--spacing-2xl);
    position: relative;
    overflow: hidden;
}

.main-content::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.1) 0%, transparent 70%);
    animation: float 6s ease-in-out infinite;
}

.welcome-message {
    text-align: center;
    max-width: 480px;
    position: relative;
    z-index: 1;
}

.welcome-message h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -1px;
    line-height: 1.2;
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.welcome-message p {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.6;
    font-weight: 400;
}

/* ===== CHAT AREA ===== */
.chat-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-primary);
    width: 50vh;
    height: 100vh;
    position: relative;
}

.chat-header {
    padding-left: 20px;
    padding-right: 10px;
    padding-top: 10px;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    background: rgba(20, 20, 43, 0.85);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: left;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.chat-partner {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    cursor: pointer;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: background-color var(--transition-fast);
}

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

.no-chats {
    text-align: center;
    padding: 40px 20px;
    color: #666;
}

.no-chats p {
    margin: 10px 0;
}

.participants-section {
    margin: 20px 0;
}

.participants-list {
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid #3d3d4e;
    border-radius: 8px;
    padding: 10px;
}

.participant-item:hover {
    background: #2d2d3e;
}

.participant-item img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.participant-item input[type="checkbox"] {
    margin: 0;
}

.add-particpants-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.add-particpants-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.add-particpants-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.create-chat-btn {
    width: 100%;
    padding: 12px;
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
}

.create-chat-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.create-chat-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

.chat-partner img, .group-avatar {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    object-fit: cover;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.chat-partner:hover img,
.chat-partner:hover .group-avatar {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.group-avatar {
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
}

.partner-info h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.3px;
}

.status-offline {
    color: rgba(250, 3, 3, 0.678);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.status-online {
    color: rgba(61, 250, 3, 0.678);
    font-size: 0.9rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.status::before {
    content: '';
    width: 8px;
    height: 8px;
    background: #4ade80;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.back-to-chats {
    display: none;
    background: none;
    border: none;
    color: var(--accent-color);
    font-size: 1.3rem;
    cursor: pointer;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-fast);
}

.back-to-chats:hover {
    background: var(--bg-hover);
    transform: scale(1.1);
}

/* ===== BEAUTIFUL MESSAGE ANIMATIONS ===== */
.messages {
    flex: 1;
    padding: var(--spacing-xl);
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    background: var(--bg-primary);
    position: relative;
    background: url('/static/css/gas-kvas-com-p-oboi-anime-temnii-gorod-7.jpg') center/cover fixed, var(--bg-primary);
    scroll-behavior: smooth;
}

.messages::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

.message {
    display: flex;
    max-width: 75%;
    position: relative;
    opacity: 0;
    animation: messageSlideIn 0.5s cubic-bezier(0.25, 0.1, 0.15, 1.2) forwards;
    margin-bottom: 12px;
}

.message.own {
    margin-left: auto;
    flex-direction: row-reverse;
    animation-name: messageSlideInRight;
}

/* Улучшенные анимации */
@keyframes messageSlideInLeft {
    0% {
        opacity: 0;
        transform: translateX(-30px) scale(0.8);
    }
    60% {
        transform: translateX(5px) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

@keyframes messageSlideInRight {
    0% {
        opacity: 0;
        transform: translateX(30px) scale(0.8);
    }
    60% {
        transform: translateX(-5px) scale(1.02);
    }
    100% {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

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

.message:nth-child(1) { animation-delay: 0.1s; }
.message:nth-child(2) { animation-delay: 0.15s; }
.message:nth-child(3) { animation-delay: 0.2s; }
.message:nth-child(4) { animation-delay: 0.25s; }
.message:nth-child(5) { animation-delay: 0.3s; }
.message:nth-child(6) { animation-delay: 0.35s; }
.message:nth-child(7) { animation-delay: 0.4s; }
.message:nth-child(8) { animation-delay: 0.45s; }
.message:nth-child(9) { animation-delay: 0.5s; }
.message:nth-child(10) { animation-delay: 0.55s; }

.message-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    object-fit: cover;
    margin: 0 12px;
    flex-shrink: 0;
    transition: transform 0.2s ease;
}

.message-avatar:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-glow);
}

.message-content {
    background: rgba(28, 28, 53, 0.9);
    backdrop-filter: blur(8px);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-lg);
    max-width: 100%;
    word-wrap: break-word;
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
    overflow: hidden;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.message-content:hover {
    box-shadow: var(--shadow-md);
}

.message.own .message-content {
    background: var(--primary-gradient);
    color: white;
    border-bottom-right-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-glow);
}

.message.other .message-content {
    background: rgba(28, 28, 53, 0.9);
    border: 1px solid rgba(139, 92, 246, 0.2);
    border-bottom-left-radius: var(--border-radius-sm);
}

.message-sender {
    font-size: 0.85rem;
    color: var(--text-accent);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.message-sender:hover {
    color: var(--accent-color);
}

.message-text {
    line-height: 1.5;
    margin-bottom: var(--spacing-xs);
    font-size: 0.95rem;
    font-weight: 400;
    position: relative;
    word-break: break-word;
}

.message-time {
    font-size: 0.75rem;
    opacity: 0.8;
    text-align: right;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xs);
    font-weight: 500;
    opacity: 0;
    animation: fadeInUp 0.3s ease-out 0.8s forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 0.8;
        transform: translateY(0);
    }
}

.message-media {
    margin: var(--spacing-md) 0;
    animation: mediaReveal 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

@keyframes mediaReveal {
    0% {
        opacity: 0;
        transform: scale(0.8) rotateX(45deg);
    }
    100% {
        opacity: 1;
        transform: scale(1) rotateX(0);
    }
}

.message-media img, .message-media video {
    max-width: 100%;
    max-height: 280px;
    border-radius: var(--border-radius);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.message-media img:hover, .message-media video:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.message-media audio {
    width: 100%;
    height: 44px;
    min-width: 280px;
    border-radius: var(--border-radius);
}

/* Эффект волны при отправке сообщения */
.message.sending {
    opacity: 0.6;
    animation: sendingPulse 2s infinite;
}

@keyframes sendingPulse {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 0.8;
    }
}

/* Анимация подтверждения доставки */
.message.delivered .message-time::after {
    content: ' ✓';
    animation: checkmarkPop 0.3s ease-out;
}

@keyframes checkmarkPop {
    0% {
        transform: scale(0);
    }
    50% {
        transform: scale(1.2);
    }
    100% {
        transform: scale(1);
    }
}

.message:hover .message-content {
    transform: translateY(-2px);
    transition: transform 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Эффект для новых сообщений */
.message.new-message {
    animation: newMessageHighlight 2s ease-out;
}

@keyframes newMessageHighlight {
    0% {
        background: rgba(139, 92, 246, 0.1);
        border-radius: var(--border-radius);
    }
    100% {
        background: transparent;
    }
}

/* ===== MESSAGE INPUT ===== */
.message-input-container {
    padding: var(--spacing-xl);
    padding-top: 10px;
    background: rgba(20, 20, 43, 0.85);
    backdrop-filter: blur(12px);
    border-top: 1px solid rgba(139, 92, 246, 0.2);
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

.media-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.media-btn {
    background: rgba(28, 28, 53, 0.8);
    border: 1px solid rgba(139, 92, 246, 0.3);
    color: var(--text-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
    flex-shrink: 0;
    font-weight: 500;
    position: relative;
    overflow: hidden;
}

.media-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    transform: translate(-50%, -50%);
    transition: width 0.3s, height 0.3s;
}

.media-btn:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
    border-color: var(--accent-color);
}

.media-btn:hover::after {
    width: 150%;
    height: 150%;
}

.message-form {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-end;
}

.message-form input {
    flex: 1;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius-lg);
    background: rgba(28, 28, 53, 0.8);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
    min-width: 0;
    font-weight: 400;
}

.message-form input:focus {
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
    transform: translateY(-1px);
}

.message-form input::placeholder {
    color: var(--text-muted);
}

.message-form button {
    padding: var(--spacing-lg) var(--spacing-xl);
    background: var(--primary-gradient);
    color: white;
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    font-weight: 600;
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.message-form button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

.message-form button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.message-form button:hover:not(:disabled)::before {
    left: 100%;
}

.message-form button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none;
}

/* ===== NEW MESSAGES INDICATOR ===== */
.new-messages-indicator {
    position: absolute;
    bottom: 100px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--primary-gradient);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius-xl);
    font-size: 0.85rem;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    z-index: 10;
    animation: newMessageBounce 2s infinite, glowPulse 2s infinite;
    border: none;
    font-weight: 600;
    backdrop-filter: blur(10px);
}

@keyframes newMessageBounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-8px);
    }
    60% {
        transform: translateX(-50%) translateY(-4px);
    }
}

@keyframes glowPulse {
    0%, 100% {
        box-shadow: 0 4px 20px rgba(139, 92, 246, 0.4);
    }
    50% {
        box-shadow: 0 6px 30px rgba(139, 92, 246, 0.6);
    }
}

/* ===== SETTINGS ===== */
.settings-area {
    flex: 1;
    padding: var(--spacing-2xl);
    background: rgba(11, 11, 30, 0.8);
    backdrop-filter: blur(12px);
    overflow-y: auto;
}

.settings-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.settings-header h1 {
    font-size: 2.2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 800;
    letter-spacing: -1px;
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.5);
}

.settings-form {
    max-width: 100%;
}

.avatar-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding: var(--spacing-2xl);
    padding-right: 25%;
    background: rgba(28, 28, 53, 0.8);
    backdrop-filter: blur(8px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(139, 92, 246, 0.2);
    flex-wrap: wrap;
    box-shadow: var(--shadow-sm);
}

/*
.avatar-preview img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent-color);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}
*/

.avatar-preview img {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid transparent;
    background: linear-gradient(135deg, #8B5CF6, #EC4899) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.avatar-preview img:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-glow);
}

.avatar-controls button {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 0.95rem;
    font-weight: 600;
    box-shadow: var(--shadow-glow);
}

.avatar-controls button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.help-text {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: var(--spacing-sm);
    font-weight: 400;
}

.form-group {
    margin-bottom: var(--spacing-2xl);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 1rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius);
    background: rgba(28, 28, 53, 0.8);
    color: var(--text-primary);
    font-size: 1rem;
    transition: all var(--transition-normal);
    font-weight: 400;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
    transform: translateY(-1px);
}

.form-group input:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-secondary);
}

.save-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--border-radius);
    font-size: 1.1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: var(--spacing-2xl);
    margin-bottom: 10px;
    width: 100%;
    font-weight: 700;
    box-shadow: var(--shadow-glow);
    position: relative;
    overflow: hidden;
}

.save-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left var(--transition-slow);
}

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

.save-btn:hover::before {
    left: 100%;
}

/* ===== STATUS ===== */
.status.online {
    color: #4ade80;
}

.status.offline {
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
}

.status-dot.online {
    background: #4ade80;
    box-shadow: 0 0 10px #4ade80;
    animation: pulse 2s infinite;
}

.status-dot.offline {
    background: #9ca3af;
}

.status-loading {
    color: var(--text-muted);
    font-style: italic;
}

/* ===== MODALS ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 10000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
    animation: modalFadeIn 0.3s ease;
}

.modal-content {
    background: rgba(28, 28, 53, 0.95);
    backdrop-filter: blur(12px);
    margin: 5vh auto auto;
    padding: var(--spacing-2xl);
    border-radius: var(--border-radius-lg);
    max-width: 500px;
    border: 1px solid rgba(139, 92, 246, 0.4);
    position: relative;
    max-height: 100%;
    overflow-y: auto;
    box-shadow: var(--shadow-lg), 0 0 0 1px rgba(139, 92, 246, 0.2) inset;
    animation: modalPop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalPop {
    0% {
        opacity: 0;
        transform: scale(0.8) translateY(20px);
    }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

.modal .close {
    position: absolute;
    right: var(--spacing-xl);
    top: var(--spacing-xl);
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-muted);
    z-index: 1;
    transition: all var(--transition-fast);
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius-sm);
    background: rgba(255,255,255,0.1);
}

.modal .close:hover {
    color: var(--text-primary);
    background: rgba(255,255,255,0.2);
    transform: rotate(90deg);
}

/* ===== IMAGE VIEWER ===== */
.image-viewer-modal {
    display: none;
    position: fixed;
    z-index: 100000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px);
    animation: imageViewerFadeIn 0.4s ease;
}

.image-viewer-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--spacing-2xl);
}

.image-viewer-content img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: imageZoomIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.image-viewer-close {
    position: absolute;
    top: var(--spacing-2xl);
    right: var(--spacing-2xl);
    color: white;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    z-index: 100001;
    background: rgba(0, 0, 0, 0.5);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: all var(--transition-normal);
    backdrop-filter: blur(10px);
}

.image-viewer-close:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.1);
}

/* ===== PROFILE MODAL ===== */
.profile-modal .modal-content {
    max-width: 440px;
    text-align: center;
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    object-fit: cover;
    border: 4px solid transparent;
    background: linear-gradient(135deg, #8B5CF6, #EC4899) border-box;
    -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
    margin: 0 auto var(--spacing-xl);
    box-shadow: var(--shadow-glow);
    transform: translateY(13px);
    transition: all var(--transition-normal);
}

.profile-avatar:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.profile-username {
    font-size: 1.6rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.5px;
}

.profile-email {
    color: var(--text-muted);
    margin-bottom: var(--spacing-2xl);
    font-size: 1rem;
    font-weight: 400;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin: var(--spacing-2xl) 0;
}

.profile-stat {
    background: rgba(20, 20, 43, 0.8);
    backdrop-filter: blur(4px);
    padding: var(--spacing-xl);
    border-radius: var(--border-radius);
    border: 1px solid rgba(139, 92, 246, 0.2);
    transition: all var(--transition-normal);
}

.profile-stat:hover {
    background: var(--bg-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: var(--accent-color);
    margin-bottom: var(--spacing-xs);
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.profile-joined {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-top: var(--spacing-xl);
    font-weight: 400;
}

/* ===== MESSAGE CONTEXT MENU ===== */
.message-context-menu {
    position: fixed;
    background: rgba(28, 28, 53, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(139, 92, 246, 0.4);
    border-radius: var(--border-radius);
    padding: var(--spacing-sm) 0;
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: none;
    animation: contextMenuSlideIn 0.2s cubic-bezier(0.4, 0, 0.2, 1);
}

.context-menu-item {
    padding: var(--spacing-md) var(--spacing-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.95rem;
    border: none;
    background: none;
    width: 100%;
    text-align: left;
    color: var(--text-primary);
    font-weight: 500;
}

.context-menu-item:hover {
    background: var(--bg-hover);
    transform: translateX(4px);
}

.context-menu-item.delete {
    color: #ef4444;
}

.context-menu-item.delete:hover {
    background: rgba(239, 68, 68, 0.1);
}

.context-menu-item.edit {
    color: var(--accent-color);
}

.context-menu-item.edit:hover {
    background: rgba(139, 92, 246, 0.1);
}

/* ===== MESSAGE ACTIONS ===== */
.message-actions {
    opacity: 0;
    transition: all var(--transition-normal);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: #ffffff;
    cursor: pointer;
    padding-left: 15px;
    padding-right: 15px;
    padding-bottom: 2px;
    padding-top: 2px;
    border-radius: var(--border-radius-sm);
    font-size: 0.85rem;
    margin-left: var(--spacing-md);
    font-weight: 600;
}

.message:hover .message-actions {
    opacity: 1;
    transform: scale(1.05);
}

.message-actions:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
    transform: scale(1.1);
}

/* ===== EDIT MESSAGE MODAL ===== */
.edit-message-modal .modal-content {
    max-width: 520px;
}

.edit-message-textarea {
    width: 100%;
    min-height: 140px;
    padding: var(--spacing-lg);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius);
    background: rgba(28, 28, 53, 0.8);
    color: var(--text-primary);
    font-size: 1rem;
    resize: vertical;
    margin-bottom: var(--spacing-xl);
    font-family: inherit;
    line-height: 1.5;
    transition: all var(--transition-normal);
    font-weight: 400;
}

.edit-message-textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: var(--bg-tertiary);
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.2);
    transform: translateY(-1px);
}

.edit-message-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: flex-end;
}

.edit-message-btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-size: 0.95rem;
    transition: all var(--transition-normal);
    font-weight: 600;
}

.edit-message-btn.save {
    background: var(--accent-color);
    color: white;
    box-shadow: var(--shadow-glow);
}

.edit-message-btn.save:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.edit-message-btn.cancel {
    background: rgba(20, 20, 43, 0.8);
    color: var(--text-secondary);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.edit-message-btn.cancel:hover {
    background: var(--bg-hover);
    color: var(--text-primary);
    transform: translateY(-2px);
}

.message-edited {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: var(--spacing-sm);
    font-style: italic;
    font-weight: 400;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(20px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-8px);
    }
    60% {
        transform: translateX(-50%) translateY(-4px);
    }
}

@keyframes glow {
    0%, 100% {
        box-shadow: var(--shadow-lg);
    }
    50% {
        box-shadow: 0 0 30px rgba(139, 92, 246, 0.5);
    }
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
    }
    50% {
        transform: translate(10px, 10px) rotate(180deg);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

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

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

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

@keyframes imageZoomIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes contextMenuSlideIn {
    from {
        opacity: 0;
        transform: scale(0.8) translateY(-10px);
    }
    to {
        opacity: 1;
        transform: scale(1) translateY(0);
    }
}

/* ===== SCROLLBARS ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #8B5CF6, #EC4899);
    border-radius: 10px;
    box-shadow: inset 0 0 6px rgba(0,0,0,0.3);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #EC4899, #8B5CF6);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (min-width: 767px) {
    .app-container {
        flex-direction: row;
    }
    
    .sidebar {
        position: static;
        transform: none;
        width: 380px;
        max-width: 380px;
    }
    
    .mobile-menu-btn {
        display: none;
    }
    
    .back-to-chats {
        display: none;
    }
    
    .message {
        max-width: 65%;
    }
}

@media (max-width: 768px) {
    body {
        height: 75vh;
    }

    .mobile-menu-btn {
        z-index: 5;
    }
    
    .back-to-chats {
        display: block;
    }
    
    .sidebar {
        width: 85%;
        max-width: 320px;
    }
    
    .sidebar-header {
        padding: var(--spacing-lg);
    }
    
    .sidebar-header h2 {
        font-size: 1.1rem;
    }
    
    .user-menu span {
        display: none;
    }
    
    .chat-item {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .chat-avatar {
        width: 44px;
        height: 44px;
        margin-right: var(--spacing-md);
    }
    
    .chat-name {
        font-size: 0.95rem;
    }
    
    .last-message {
        font-size: 0.85rem;
    }
    
    .chat-time {
        display: none;
    }

    .message {
        max-width: 92%;
        animation-duration: 0.4s;
    }
    
    .message-avatar {
        width: 32px;
        height: 32px;
        margin: 0 var(--spacing-sm);
    }
    
    .message-content {
        padding: var(--spacing-md);
    }
    
    .message-text {
        font-size: 0.9rem;
    }
    
    .message-media img, .message-media video {
        max-height: 220px;
    }
    
    .message-input-container {
        padding: var(--spacing-lg);
    }
    
    .message-actions {
        opacity: 1;
    }
    
    .image-viewer-close {
        top: var(--spacing-lg);
        right: var(--spacing-lg);
        font-size: 1.5rem;
        width: 44px;
        height: 44px;
    }

    @media (prefers-reduced-motion: reduce) {
        .message,
        .message-avatar,
        .message-content::before,
        .message-time {
            animation: none !important;
            opacity: 1 !important;
            transform: none !important;
        }
    }
}

@media (max-width: 480px) {
    .sidebar-header {
        padding: var(--spacing-md);
    }
    
    .chat-item {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .chat-avatar {
        width: 40px;
        height: 40px;
        margin-right: var(--spacing-sm);
    }
    
    .chat-name {
        font-size: 0.9rem;
    }
    
    .last-message {
        font-size: 0.8rem;
    }
    
    .new-chat-btn {
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 0.95rem;
    }

    .messages {
        padding: var(--spacing-lg);
        gap: var(--spacing-md);
    }
    
    .message {
        max-width: 92%;
    }
    
    .message-media img, .message-media video {
        max-height: 180px;
    }
    
    .message-media audio {
        min-width: 240px;
    }
    
    .new-messages-indicator {
        bottom: 90px;
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 0.8rem;
    }
}

/* ===== UTILITY CLASSES ===== */
.desktop-only {
    display: block;
}

@media (max-width: 767px) {
    .desktop-only {
        display: none;
    }
}

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

/* ===== DARK MODE SUPPORT ===== */
@media (prefers-color-scheme: dark) {
    :root {
        color-scheme: dark;
    }
}

/* ===== TOUCH DEVICE OPTIMIZATIONS ===== */
@media (hover: none) and (pointer: coarse) {
    .message-actions {
        opacity: 1;
        background: rgba(255, 255, 255, 0);
        padding-left: 15px;
        padding-right: 15px;
        padding-bottom: 2px;
        padding-top: 2px;
        font-size: 0.9rem;
    }
    
    .context-menu-item {
        padding: var(--spacing-lg) var(--spacing-xl);
        font-size: 1rem;
    }
    
    .chat-item:hover {
        transform: none;
    }
    
    .chat-item:active {
        background: var(--bg-active);
    }
}

/* ===== УЛУЧШЕННЫЕ СТИЛИ СТАТУСОВ ===== */
.status.online {
    color: #4ade80;
}

.status.offline {
    color: var(--text-muted);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    display: inline-block;
    transition: all var(--transition-normal);
}

.status-dot.online {
    background: #4ade80;
    box-shadow: 0 0 10px #4ade80;
    animation: pulse 2s infinite;
}

.status-dot.offline {
    background: #9ca3af;
}

.status-loading {
    color: var(--text-muted);
    font-style: italic;
}

.chat-status {
    font-size: 0.75rem;
    margin-top: 2px;
}

.chat-item .status {
    font-size: 0.75rem;
}

/* Индикатор активности в реальном времени */
.typing-indicator {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--accent-color);
    font-size: 0.8rem;
    font-style: italic;
}

.typing-dots {
    display: flex;
    gap: 2px;
}

.typing-dot {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-color);
    animation: typingBounce 1.4s infinite ease-in-out;
}

.typing-dot:nth-child(1) { animation-delay: -0.32s; }
.typing-dot:nth-child(2) { animation-delay: -0.16s; }
.typing-dot:nth-child(3) { animation-delay: 0s; }

@keyframes typingBounce {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Панель онлайн пользователей */
.online-users-panel {
    background: rgba(20, 20, 43, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(139, 92, 246, 0.2);
    padding: 10px 20px;
    overflow-x: auto;
}

.online-users-list {
    display: flex;
    gap: 15px;
    align-items: center;
}

.online-user {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    transition: all var(--transition-normal);
    min-width: 60px;
}

.online-user:hover {
    transform: translateY(-2px);
}

.online-user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #4ade80;
    position: relative;
}

.online-user-avatar::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 10px;
    height: 10px;
    background: #4ade80;
    border-radius: 50%;
    border: 2px solid var(--bg-secondary);
}

.online-user-name {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-align: center;
    max-width: 60px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Мобильная адаптация */
@media (max-width: 768px) {
    .online-users-panel {
        padding: 8px 15px;
    }
    
    .online-users-list {
        gap: 10px;
    }
    
    .online-user {
        min-width: 50px;
    }
    
    .online-user-avatar {
        width: 35px;
        height: 35px;
    }
    
    .online-user-name {
        font-size: 0.7rem;
        max-width: 50px;
    }
}

/* ===== СТИЛИ ДЛЯ УЧАСТНИКОВ ЧАТА ===== */
.modal-header {
    display: flex;
    align-items: flex-start;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-light);
    justify-content: space-between;
    flex-direction: column;
}

.participants-count {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.participants-actions {
    margin-bottom: 20px;
}

.participants-list-container {
    max-height: 400px;
    overflow-y: auto;
}

.search-participants {
    margin-bottom: 15px;
}

.search-participants input {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius);
    background: rgba(28, 28, 53, 0.8);
    color: var(--text-primary);
}

.participant-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    border-radius: var(--border-radius);
    margin-bottom: 8px;
    background: rgba(20, 20, 43, 0.8);
    backdrop-filter: blur(4px);
    transition: background-color var(--transition-fast);
}

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

.participant-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.participant-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.participant-details {
    flex: 1;
}

.participant-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.participant-status {
    font-size: 0.8rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

.btn-remove-participant {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: 6px 10px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-remove-participant:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: scale(1.05);
}

/* Стили для добавления участников */
.available-users-list {
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 20px;
}

.available-users-list h4 {
    margin-bottom: 10px;
    color: var(--text-primary);
}

.user-select-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 15px;
    border-radius: var(--border-radius);
    margin-bottom: 8px;
    background: rgba(20, 20, 43, 0.8);
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

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

.user-select-item img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.user-select-item span:first-of-type {
    flex: 1;
    font-weight: 500;
}

.user-status {
    font-size: 0.8rem;
    padding: 2px 8px;
    border-radius: 12px;
    background: rgba(30, 30, 63, 0.5);
}

.user-status.online {
    background: rgba(74, 222, 128, 0.2);
    color: #4ade80;
}

.user-status.offline {
    background: rgba(156, 163, 175, 0.2);
    color: #9ca3af;
}

.selected-participants {
    margin-bottom: 20px;
}

.selected-list {
    min-height: 60px;
    border: 1px dashed rgba(139, 92, 246, 0.5);
    border-radius: var(--border-radius);
    padding: 10px;
    background: rgba(20, 20, 43, 0.5);
}

.empty-selection {
    color: var(--text-muted);
    text-align: center;
    padding: 20px;
}

.selected-user-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--primary-gradient);
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    margin: 4px;
    font-size: 0.9rem;
    box-shadow: var(--shadow-glow);
}

.selected-user-item button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.selected-user-item button:hover {
    background: rgba(255, 255, 255, 0.2);
}

.modal-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
    margin-top: 20px;
}

/* Системные сообщения */
.message.system .message-content {
    background: rgba(30, 30, 63, 0.8);
    color: var(--text-muted);
    font-style: italic;
    border: 1px solid var(--border-light);
}

.message.system .message-text {
    text-align: center;
}

/* Адаптивность */
@media (max-width: 768px) {
    .participant-item {
        padding: 10px 12px;
    }
    
    .participant-avatar {
        width: 35px;
        height: 35px;
    }
    
    .user-select-item {
        padding: 8px 12px;
    }
    
    .user-select-item img {
        width: 28px;
        height: 28px;
    }
    
    .modal-actions {
        flex-direction: column;
    }
    
    .modal-actions button {
        width: 100%;
    }
}

/* Стили для действий с чатом */
.chat-actions {
    position: absolute;
    right: 10px;
    top: 50%;
    transform: translateY(-50%);
    opacity: 0;
    transition: opacity var(--transition-normal);
}

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

.chat-delete-btn {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: 6px 10px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.chat-delete-btn:hover {
    background: rgba(239, 68, 68, 0.2);
    transform: scale(1.1);
}

/* Стили для расширенных настроек */
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius);
    background: rgba(28, 28, 53, 0.8);
    color: var(--text-primary);
    font-size: 1rem;
    resize: vertical;
    min-height: 100px;
    font-family: inherit;
}

.form-group select {
    width: 75%;
    padding: var(--spacing-lg) var(--spacing-xl);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: var(--border-radius);
    background: rgba(28, 28, 53, 0.8);
    color: var(--text-primary);
    font-size: 1rem;
}

.security-section {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #e0e0e0;
}

.security-section h3 {
    margin-bottom: 15px;
    color: #333;
}

.security-btn {
    display: inline-block;
    background: #17a2b8;
    color: white;
    padding: 12px 20px;
    border-radius: 6px;
    text-decoration: none;
    transition: background 0.3s ease;
}

.security-btn:hover {
    background: #138496;
    color: white;
    text-decoration: none;
}