.chat-header{color:#fff;z-index:10;background:linear-gradient(135deg,#0b6fd6 0%,#0956a5 100%);flex-shrink:0;align-items:center;height:64px;min-height:64px;padding:0 16px;display:flex;box-shadow:0 2px 8px #00000014}.chat-header-content{justify-content:space-between;align-items:center;gap:12px;width:100%;display:flex}.chat-header-back{color:#fff;cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:40px;height:40px;transition:background-color .2s;display:flex}.chat-header-back:hover{background-color:#ffffff1a}.chat-header-back:active{background-color:#fff3}.chat-header-info{flex:1;align-items:center;gap:12px;min-width:0;display:flex}.chat-header-avatar{flex-shrink:0;width:40px;height:40px;position:relative}.chat-header-avatar img{object-fit:cover;border:2px solid #fff;border-radius:50%;width:100%;height:100%}.chat-header-status-dot{background-color:#10b981;border:2px solid #fff;border-radius:50%;width:12px;height:12px;position:absolute;bottom:0;right:0}.chat-header-text{flex:1;min-width:0}.chat-header-title{white-space:nowrap;text-overflow:ellipsis;margin:0;font-size:16px;font-weight:600;line-height:1.3;overflow:hidden}.chat-header-subtitle{opacity:.9;white-space:nowrap;text-overflow:ellipsis;margin:2px 0 0;font-size:13px;line-height:1.3;overflow:hidden}.status-online{font-weight:500}.chat-header-actions{align-items:center;gap:8px;display:flex}.chat-header-action-btn{color:#fff;cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;transition:background-color .2s;display:flex}.chat-header-action-btn:hover{background-color:#ffffff1a}.chat-header-action-btn:active{background-color:#fff3}