*{box-sizing:border-box;margin:0;padding:0;font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif}body{color:#fff;background-color:#212121}.app-container{flex-direction:column;height:100vh;display:flex}.content-wrapper{flex:1;display:flex;overflow:hidden}.mainbar{flex-direction:column;flex:1;display:flex;overflow:hidden}.chat-container{flex-direction:column;height:100%;display:flex}.navbar{background-color:#1a1a1a;border-bottom:1px solid #333;justify-content:space-between;align-items:center;height:60px;padding:16px 20px;display:flex}.navbar-content{align-items:center;gap:10px;display:flex}.navbar h2{font-size:20px;font-weight:500}.sidebar{background-color:#1a1a1a;border-right:1px solid #333;flex-direction:column;width:260px;padding:16px;display:flex;overflow-y:auto}.chat-history h4{text-transform:uppercase;color:#999;margin-bottom:10px;font-size:12px}.chat-item{cursor:pointer;border-radius:6px;justify-content:space-between;align-items:center;margin-bottom:8px;padding:10px 12px;font-size:14px;transition:background-color .2s;display:flex}.chat-item span{white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.chat-item:hover{background-color:#2a2a2a}.chat-item.active{background-color:#10a37f}.delete-btn{color:#999;cursor:pointer;opacity:0;background:0 0;border:none;border-radius:4px;flex-shrink:0;padding:2px 6px;font-size:14px;transition:opacity .2s,color .2s}.chat-item:hover .delete-btn{opacity:1}.delete-btn:hover{color:#f55}.new-chat-btn,.send-btn{color:#fff;cursor:pointer;background-color:#10a37f;border:none;border-radius:6px;padding:10px 20px;font-weight:500;transition:background-color .2s}.new-chat-btn{width:100%;margin-bottom:16px}.new-chat-btn:hover,.send-btn:hover{background-color:#0d8c6f}.messages{flex-direction:column;flex:1;gap:16px;padding:20px;display:flex;overflow-y:auto}.message{margin-bottom:8px;display:flex}.message.user{justify-content:flex-end}.message.user p{color:#fff;word-wrap:break-word;background-color:#10a37f;border-radius:8px;max-width:70%;padding:12px 16px}.message.assistant{justify-content:flex-start}.message.assistant>div{color:#fff;background-color:#2a2a2a;border-radius:8px;max-width:70%;padding:16px}.message.assistant p{padding:4px 0}.message ul{padding-left:24px}.message li{margin-bottom:8px}.input-area{border-top:1px solid #333;gap:10px;padding:20px;display:flex}.chat-input{color:#fff;background-color:#2a2a2a;border:1px solid #333;border-radius:6px;flex:1;padding:12px 16px;font-size:14px}.chat-input:focus{background-color:#333;border-color:#10a37f;outline:none}