:root{--primary-color:#007bff;--primary-hover:#0056b3;--background-color:#f8f9fa;--sidebar-bg:#fff;--chat-bg:#f0f2f5;--message-sent-bg:#007bff;--message-received-bg:#fff;--text-primary:#2c3e50;--text-secondary:#6c757d;--text-muted:#95a5a6;--border-color:#e9ecef;--shadow:0 2px 10px #0000001a;--border-radius:12px}.messenger-container{background:var(--background-color);height:60vh;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}.messenger-wrapper{background:var(--sidebar-bg);height:100%;box-shadow:var(--shadow);margin:0 auto;display:flex}.conversations-sidebar{border-right:1px solid var(--border-color);background:var(--sidebar-bg);flex-direction:column;width:350px;display:flex}.sidebar-header{border-bottom:1px solid var(--border-color);background:var(--sidebar-bg);padding:20px}.sidebar-header .user-info h3{color:var(--text-primary);margin:0 0 15px;font-size:1.5rem;font-weight:600}.new-chat-select{border:1px solid var(--border-color);border-radius:20px;padding:8px 15px;font-size:.9rem}.conversations-list{flex:1;overflow-y:auto}.conversation-item{border-bottom:1px solid var(--border-color);cursor:pointer;align-items:center;padding:15px 20px;transition:background-color .2s;display:flex}.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{margin-right:15px;position:relative}.avatar-img{object-fit:cover;border-radius:50%;width:50px;height:50px}.online-indicator{background:#4caf50;border:2px solid #fff;border-radius:50%;width:12px;height:12px;position:absolute;bottom:2px;right:2px}.conversation-content{flex:1;min-width:0}.conversation-header{justify-content:space-between;align-items:center;margin-bottom:5px;display:flex}.conversation-name{color:inherit;margin:0;font-size:1rem;font-weight:600}.conversation-time{color:var(--text-muted);font-size:.8rem}.conversation-preview{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:.9rem;overflow:hidden}.no-conversations{text-align:center;color:var(--text-muted);padding:40px 20px}.no-conversations-icon{margin-bottom:15px;font-size:3rem}.chat-main{background:var(--chat-bg);flex-direction:column;flex:1;display:flex}.chat-header{background:var(--sidebar-bg);border-bottom:1px solid var(--border-color);padding:15px 25px;box-shadow:0 1px 3px #0000001a}.chat-user-info{align-items:center;display:flex}.chat-avatar{margin-right:15px;position:relative}.user-details .user-name{color:var(--text-primary);margin:0;font-size:1.1rem;font-weight:600}.user-details .user-status{color:var(--text-muted);font-size:.85rem}.chat-messages{background:var(--chat-bg);flex:1;padding:20px;overflow-y:auto}.message-wrapper{align-items:flex-end;margin-bottom:15px;display:flex}.message-sent{justify-content:flex-end}.message-received{justify-content:flex-start}.message-avatar{object-fit:cover;border-radius:50%;width:35px;height:35px;margin:0 8px}.message-content{max-width:60%}.message-bubble{border-radius:18px;padding:12px 16px;position:relative;box-shadow:0 1px 2px #0000001a}.message-bubble.sent{background:var(--message-sent-bg);color:#fff;border-bottom-right-radius:4px}.message-bubble.received{background:var(--message-received-bg);color:var(--text-primary);border:1px solid var(--border-color);border-bottom-left-radius:4px}.message-text{word-wrap:break-word;margin:0}.message-time{opacity:.8;text-align:right;font-size:.7rem;display:block}.chat-input-container{background:var(--sidebar-bg);border-top:1px solid var(--border-color);padding:20px}.chat-input-form{width:100%}.input-group{align-items:center;gap:8px;display:flex;position:relative}.attach-button{cursor:pointer;color:#6c757d;background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;padding:8px;transition:all .2s;display:flex}.attach-button:hover{color:#007bff;background:#f0f0f0}.conversation-search{background:#fff;border-bottom:1px solid #eee;padding:10px}.search-input{border:1px solid #ddd;border-radius:8px;width:100%;padding:8px 12px;font-size:14px}.search-input:focus{border-color:#4a8cff;outline:none;box-shadow:0 0 4px #4a8cff66}.conversation-item.unread h4,.conversation-item.unread .message-preview{color:#000;font-weight:700}.conversation-item.unread{background:#4a8cff14}.file-preview{background:#f8f9fa;border:1px solid #dee2e6;border-radius:8px;margin-top:8px;padding:8px}.preview-wrapper{max-width:200px;display:inline-block;position:relative}.preview-image,.preview-video{object-fit:cover;border-radius:8px;max-width:100%;max-height:150px}.remove-file{color:#fff;cursor:pointer;background:#dc3545;border:none;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:16px;display:flex;position:absolute;top:-8px;right:-8px}.chat-input{background:0 0;border:none;outline:none;flex:1;padding:12px 20px;font-size:1rem}.chat-input::placeholder{color:var(--text-muted)}.send-button{background:var(--primary-color);color:#fff;cursor:pointer;border:none;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;transition:background-color .2s;display:flex}.send-button:hover:not(:disabled){background:var(--primary-hover)}.send-button:disabled{background:var(--text-muted);cursor:not-allowed}.chat-welcome{background:var(--chat-bg);flex:1;justify-content:center;align-items:center;display:flex}.welcome-content{text-align:center;color:var(--text-muted)}.welcome-icon{margin-bottom:20px;font-size:4rem}.welcome-content h2{color:var(--text-primary);margin-bottom:10px}.conversations-list::-webkit-scrollbar{width:6px}.chat-messages::-webkit-scrollbar{width:6px}.conversations-list::-webkit-scrollbar-track{background:0 0}.chat-messages::-webkit-scrollbar-track{background:0 0}.conversations-list::-webkit-scrollbar-thumb{background:#cbd5e0;border-radius:3px}.chat-messages::-webkit-scrollbar-thumb{background:#cbd5e0;border-radius:3px}.conversations-list::-webkit-scrollbar-thumb:hover{background:#a0aec0}.chat-messages::-webkit-scrollbar-thumb:hover{background:#a0aec0}.message-file{margin-top:4px}.message-file img,.message-file video{border-radius:12px;margin-top:4px}.file-image{border-radius:8px;box-shadow:0 1px 3px #0003}.chat-image{object-fit:cover;cursor:pointer;border-radius:10px;width:250px;max-height:270px;transition:transform .2s;display:block}.chat-video{object-fit:cover;cursor:pointer;border-radius:10px;width:300px;max-height:320px;transition:transform .2s;display:block}.chat-image:hover,.chat-video:hover{transform:scale(1.03)}.file-link{color:#007bff;background:#f8f9fa;border:1px solid #dee2e6;border-radius:6px;align-items:center;gap:6px;padding:6px 10px;font-size:.9rem;text-decoration:none;display:inline-flex}.file-link:hover{background:#e9ecef;text-decoration:underline}.image-modal{z-index:9999;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px);background:#000c;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0}.image-modal-content{object-fit:contain;border-radius:10px;width:90%;height:90%;animation:.25s zoomIn;box-shadow:0 0 30px #000000b3}.close-button{cursor:pointer;z-index:10000;background:#0006;border:none;border-radius:50%;padding:8px;transition:background .3s;position:absolute;top:15px;right:20px}.close-button:hover{background:#ffffff40}.preview-banner-modern{-webkit-backdrop-filter:blur(12px);background:#ffffffbf;border:1px solid #c8c8c859;border-radius:16px;align-items:center;gap:15px;margin:12px 0 0;padding:14px 18px;animation:.25s forwards slideUp;display:flex;box-shadow:0 4px 18px #00000014}@keyframes slideUp{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.preview-media{flex-shrink:0}.preview-thumb{object-fit:cover;border-radius:12px;width:110px;height:75px;box-shadow:0 3px 10px #0000002e}.preview-info{flex-direction:column;flex:1;display:flex}.preview-name{color:#2c3e50;margin-bottom:4px;font-size:.95rem;font-weight:600}.preview-size{color:#6c757d;font-size:.8rem}.preview-close-btn{color:#fff;cursor:pointer;background:#ff4d4f;border:none;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;transition:all .2s;display:flex}.preview-close-btn:hover{background:#d9363e;transform:scale(1.05)}@keyframes zoomIn{0%{opacity:0;transform:scale(.7)}to{opacity:1;transform:scale(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{padding:6px;top:10px;right:10px}}.image-modal{z-index:9999;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#000000f2;justify-content:center;align-items:center;width:100vw;height:100vh;animation:.3s fadeIn;display:flex;position:fixed;top:0;left:0}.image-modal-content{border-radius:16px;max-width:95%;max-height:95%;position:relative;overflow:hidden}.image-modal-content img{object-fit:contain;width:100%;height:100%}.close-button{color:#fff;cursor:pointer;z-index:10000;background:0 0;border:none;border-radius:50%;width:50px;height:50px;font-size:32px;transition:all .2s;position:absolute;top:20px;right:25px}.close-button:hover{background:0 0;transform:scale(1.1)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}.skeleton-image{background:#e0e0e0;border-radius:8px;width:250px;height:250px;position:relative;overflow:hidden}.shimmer{background:linear-gradient(90deg,#0000,#fff6,#0000);width:50%;height:100%;animation:1.5s infinite shimmer;position:absolute;top:0;left:-150%}@keyframes shimmer{0%{left:-150%}to{left:150%}}