@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap";html,body{height:100%;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif;background:#f5f7fa;color:#2c3e50;font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}#root{height:100%;min-height:100vh}:root{--bg-page: #f5f7fa;--bg-white: #ffffff;--bg-sidebar: #fafbfc;--primary: #2d9679;--primary-light: #e8f5f1;--primary-dark: #247a63;--text-dark: #2c3e50;--text-muted: #7f8c8d;--text-light: #95a5a6;--border: #e8ecef;--border-light: #f0f2f4;--message-other: #e8f5f1;--message-self: #2d9679;--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08);--shadow-md: 0 4px 12px rgba(0, 0, 0, .1);--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg-page);color:var(--text-dark);font-size:14px;line-height:1.5}.chat-widget{display:flex;height:100%;min-height:500px;background:var(--bg-white);border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm)}.chat-sidebar{width:260px;min-width:260px;background:var(--bg-white);border-right:1px solid var(--border);display:flex;flex-direction:column}.sidebar-header{padding:16px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border-light)}.sidebar-header h2{font-size:15px;font-weight:600;color:var(--text-dark);margin:0}.btn-new{width:28px;height:28px;border-radius:6px;border:none;background:var(--primary);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:16px;transition:background .2s}.btn-new:hover{background:var(--primary-dark)}.search-box{padding:12px 16px}.search-box input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px;background:var(--bg-page);color:var(--text-dark)}.search-box input::placeholder{color:var(--text-light)}.search-box input:focus{outline:none;border-color:var(--primary);background:var(--bg-white)}.conversation-list{flex:1;overflow-y:auto}.conversation-item{display:flex;align-items:center;padding:12px 16px;cursor:pointer;transition:background .15s;border-left:3px solid transparent}.conversation-item:hover{background:var(--bg-page)}.conversation-item.active{background:var(--primary-light);border-left-color:var(--primary)}.conversation-avatar{width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px;margin-right:12px;flex-shrink:0}.conversation-avatar.general{background:var(--primary)}.conversation-info{flex:1;min-width:0;overflow:hidden}.conversation-name{font-size:14px;font-weight:500;color:var(--text-dark);margin-bottom:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-preview{font-size:12px;color:var(--text-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.conversation-meta{flex-shrink:0;margin-left:8px;text-align:right}.unread-badge{background:var(--primary);color:#fff;font-size:11px;min-width:18px;height:18px;padding:0 5px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;font-weight:500}.chat-panel{flex:1;display:flex;flex-direction:column;background:var(--bg-white);position:relative}.chat-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;background:var(--bg-white)}.chat-header-left{display:flex;align-items:center;gap:12px}.chat-header-avatar{width:36px;height:36px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:600;font-size:14px}.chat-header-info h3{font-size:15px;font-weight:600;color:var(--text-dark);margin:0}.search-btn{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:8px;border-radius:6px;transition:all .15s}.search-btn:hover{background:var(--bg-page);color:var(--primary)}.messages-container{flex:1;overflow-y:auto;padding:20px;background:var(--bg-page)}.date-divider{text-align:center;margin:16px 0}.date-divider span{background:var(--bg-white);color:var(--text-muted);font-size:12px;padding:4px 12px;border-radius:12px;box-shadow:var(--shadow-sm)}.message{max-width:65%;margin-bottom:8px}.message.self{margin-left:auto}.message.other{margin-right:auto}.message-bubble{padding:10px 14px;border-radius:var(--radius-md);font-size:14px;line-height:1.4;word-wrap:break-word}.message.self .message-bubble{background:var(--message-self);color:#fff;border-bottom-right-radius:4px}.message.other .message-bubble{background:var(--message-other);color:var(--text-dark);border-bottom-left-radius:4px}.message-time{font-size:11px;color:var(--text-light);margin-top:4px;padding:0 4px}.message.self .message-time{text-align:right}.chat-composer{padding:16px 20px;background:var(--bg-white);border-top:1px solid var(--border);display:flex;align-items:center;gap:12px}.btn-attach{background:none;border:none;color:var(--text-muted);cursor:pointer;padding:8px;border-radius:6px}.btn-attach:hover{background:var(--bg-page);color:var(--primary)}.composer-input{flex:1;padding:10px 16px;border:1px solid var(--border);border-radius:20px;font-size:14px;background:var(--bg-page);color:var(--text-dark);outline:none}.composer-input:focus{border-color:var(--primary);background:var(--bg-white)}.composer-input::placeholder{color:var(--text-light)}.btn-send{width:36px;height:36px;border-radius:50%;border:none;background:var(--primary);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .2s;flex-shrink:0}.btn-send:hover{background:var(--primary-dark)}.btn-send:disabled{background:var(--border);cursor:not-allowed}.empty-state{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;color:var(--text-muted);padding:40px;background:var(--bg-page)}.empty-state h3{font-size:16px;font-weight:600;color:var(--text-dark);margin-bottom:8px}.empty-state p{font-size:14px;color:var(--text-muted)}.modal-overlay{position:fixed;inset:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:1000}.modal{background:var(--bg-white);border-radius:var(--radius-md);width:100%;max-width:400px;max-height:80vh;overflow:hidden;box-shadow:var(--shadow-md)}.modal-header{padding:16px 20px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}.modal-header h3{font-size:16px;font-weight:600;margin:0}.modal-close{background:none;border:none;font-size:20px;color:var(--text-muted);cursor:pointer;padding:4px}.modal-close:hover{color:var(--text-dark)}.modal-body{padding:8px 0;max-height:350px;overflow-y:auto}.user-list-item{display:flex;align-items:center;padding:12px 20px;cursor:pointer;transition:background .15s}.user-list-item:hover{background:var(--bg-page)}.user-avatar{width:36px;height:36px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-weight:600;font-size:13px;margin-right:12px}.user-name{font-size:14px;font-weight:500;color:var(--text-dark)}.search-overlay{position:absolute;top:70px;right:20px;background:var(--bg-white);border-radius:var(--radius-sm);box-shadow:var(--shadow-md);padding:12px;width:280px;z-index:100}.search-overlay input{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:13px}.search-overlay input:focus{outline:none;border-color:var(--primary)}.search-results{max-height:180px;overflow-y:auto;margin-top:8px}.search-result-item{padding:8px 10px;border-radius:4px;cursor:pointer;font-size:13px;color:var(--text-dark)}.search-result-item:hover{background:var(--bg-page)}.loading{display:flex;align-items:center;justify-content:center;padding:40px;color:var(--text-muted);font-size:14px}.chat-widget.widget-mode{border-radius:0;height:100%}@media(max-width:768px){.chat-sidebar{width:100%;min-width:auto;position:absolute;left:0;top:0;bottom:0;z-index:10}.chat-widget{flex-direction:column}}