:root{--primary-color: #007bff;--primary-hover: #0056b3;--background-color: #f8f9fa;--sidebar-bg: #ffffff;--chat-bg: #f0f2f5;--message-sent-bg: #007bff;--message-received-bg: #ffffff;--text-primary: #2c3e50;--text-secondary: #6c757d;--text-muted: #95a5a6;--border-color: #e9ecef;--shadow: 0 2px 10px rgba(0, 0, 0, .1);--border-radius: 12px}.messenger-container{height:60vh;background:var(--background-color);font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.messenger-wrapper{display:flex;height:100%;margin:0 auto;background:var(--sidebar-bg);box-shadow:var(--shadow)}.conversations-sidebar{width:350px;border-right:1px solid var(--border-color);display:flex;flex-direction:column;background:var(--sidebar-bg)}.sidebar-header{padding:20px;border-bottom:1px solid var(--border-color);background:var(--sidebar-bg)}.sidebar-header .user-info h3{margin:0 0 15px;color:var(--text-primary);font-size:1.5rem;font-weight:600}.new-chat-select{border-radius:20px;border:1px solid var(--border-color);padding:8px 15px;font-size:.9rem}.conversations-list{flex:1;overflow-y:auto}.conversation-item{display:flex;align-items:center;padding:15px 20px;border-bottom:1px solid var(--border-color);cursor:pointer;transition:background-color .2s ease}.conversation-item:hover{background-color:#f8f9fa}.conversation-item.active{background-color:var(--primary-color);color:#fff}.conversation-item.active .conversation-preview,.conversation-item.active .conversation-time{color:#fffc}.conversation-avatar{position:relative;margin-right:15px}.avatar-img{width:50px;height:50px;border-radius:50%;object-fit:cover}.online-indicator{position:absolute;bottom:2px;right:2px;width:12px;height:12px;background:#4caf50;border:2px solid white;border-radius:50%}.conversation-content{flex:1;min-width:0}.conversation-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:5px}.conversation-name{margin:0;font-size:1rem;font-weight:600;color:inherit}.conversation-time{font-size:.8rem;color:var(--text-muted)}.conversation-preview{margin:0;font-size:.9rem;color:var(--text-secondary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.no-conversations{text-align:center;padding:40px 20px;color:var(--text-muted)}.no-conversations-icon{font-size:3rem;margin-bottom:15px}.chat-main{flex:1;display:flex;flex-direction:column;background:var(--chat-bg)}.chat-header{padding:15px 25px;background:var(--sidebar-bg);border-bottom:1px solid var(--border-color);box-shadow:0 1px 3px #0000001a}.chat-user-info{display:flex;align-items:center}.chat-avatar{position:relative;margin-right:15px}.user-details .user-name{margin:0;font-size:1.1rem;font-weight:600;color:var(--text-primary)}.user-details 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var(--border-color)}.chat-input-form{width:100%}.input-group{display:flex;align-items:center;gap:8px;position:relative}.attach-button{background:none;border:none;cursor:pointer;padding:8px;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#6c757d;transition:all .2s}.attach-button:hover{background:#f0f0f0;color:#007bff}.conversation-search{padding:10px;background:#fff;border-bottom:1px solid #eee}.search-input{width:100%;padding:8px 12px;border-radius:8px;border:1px solid #ddd;font-size:14px}.search-input:focus{outline:none;border-color:#4a8cff;box-shadow:0 0 4px #4a8cff66}.conversation-item.unread h4,.conversation-item.unread .message-preview{font-weight:700;color:#000}.conversation-item.unread{background:#4a8cff14}.file-preview{margin-top:8px;padding:8px;background:#f8f9fa;border-radius:8px;border:1px solid #dee2e6}.preview-wrapper{position:relative;display:inline-block;max-width:200px}.preview-image,.preview-video{max-width:100%;max-height:150px;border-radius:8px;object-fit:cover}.remove-file{position:absolute;top:-8px;right:-8px;background:#dc3545;color:#fff;border:none;width:24px;height:24px;border-radius:50%;font-size:16px;cursor:pointer;display:flex;align-items:center;justify-content:center}.chat-input{flex:1;border:none;outline:none;padding:12px 20px;background:transparent;font-size:1rem}.chat-input::placeholder{color:var(--text-muted)}.send-button{background:var(--primary-color);border:none;border-radius:50%;width:40px;height:40px;display:flex;align-items:center;justify-content:center;color:#fff;cursor:pointer;transition:background-color .2s 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#0003}.chat-image{width:250px;max-height:270px;object-fit:cover;border-radius:10px;cursor:pointer;transition:transform .2s ease;display:block}.chat-video{width:300px;max-height:320px;object-fit:cover;border-radius:10px;cursor:pointer;transition:transform .2s ease;display:block}.chat-image:hover,.chat-video:hover{transform:scale(1.03)}.file-link{display:inline-flex;align-items:center;gap:6px;color:#007bff;text-decoration:none;font-size:.9rem;padding:6px 10px;background:#f8f9fa;border-radius:6px;border:1px solid #dee2e6}.file-link:hover{background:#e9ecef;text-decoration:underline}.image-modal{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000c;display:flex;justify-content:center;align-items:center;z-index:9999;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.image-modal-content{border-radius:10px;width:90%;height:90%;object-fit:contain;box-shadow:0 0 30px #000000b3;animation:zoomIn .25s 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#0000002e}.preview-info{display:flex;flex-direction:column;flex:1}.preview-name{font-size:.95rem;font-weight:600;color:#2c3e50;margin-bottom:4px}.preview-size{font-size:.8rem;color:#6c757d}.preview-close-btn{background:#ff4d4f;color:#fff;border:none;font-size:16px;width:32px;height:32px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}.preview-close-btn:hover{background:#d9363e;transform:scale(1.05)}@keyframes zoomIn{0%{transform:scale(.7);opacity:0}to{transform:scale(1);opacity:1}}@media(max-width:768px){.messenger-wrapper{flex-direction:column}.conversations-sidebar{width:100%;height:40%}.chat-main{height:60%}.message-content{max-width:80%}.close-button{top:10px;right:10px;padding:6px}}.image-modal{position:fixed;top:0;left:0;width:100vw;height:100vh;background:#000000f2;display:flex;justify-content:center;align-items:center;z-index:9999;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);animation:fadeIn .3s 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100%);--background-color: #f8fafc;--surface-color: #ffffff;--surface-elevated: #fdfdff;--text-primary: #1e293b;--text-secondary: #475569;--text-muted: #94a3b8;--border-color: #e2e8f0;--border-light: #f1f5f9;--success-color: #10b981;--error-color: #ef4444;--warning-color: #f59e0b;--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow: 0 4px 6px -1px rgba(0, 0, 0, .1), 0 2px 4px -1px rgba(0, 0, 0, .06);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1), 0 4px 6px -2px rgba(0, 0, 0, .05);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1), 0 10px 10px -5px rgba(0, 0, 0, .04);--radius-lg: 16px;--radius-md: 12px;--radius-sm: 8px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,SF Pro Display,-apple-system,BlinkMacSystemFont,sans-serif;background:var(--background-color);color:var(--text-primary);line-height:1.6}.messaging-app{height:100vh;background:var(--background-color);display:flex;flex-direction:column;overflow:hidden}.connection-error,.connection-warning{padding:16px 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button{width:48px;height:48px;border-radius:24px;background:#333;font-size:18px;border:none;color:#fff;cursor:pointer}.off,.end{background:#dc3545!important}.end{width:60px!important;height:60px!important;border-radius:30px!important}