body{font-family:Arial,sans-serif;background-color:#f8f9fa}.app-container{display:flex;height:100vh}.sidebar{width:12%;padding:10px;border-right:1px solid #ddd;background-color:#fff}.chat-container{width:88%;display:flex;flex-direction:column;padding:10px;background-color:#f9f9f9}.chat-list{max-height:400px;overflow-y:auto}.chat-item-container{display:flex;justify-content:space-between;align-items:center}.chat-item{padding:10px;margin-bottom:5px;border-radius:10px;cursor:pointer;flex:1}.chat-item.active{background-color:#cce5ff}.add-session-button{padding:10px;border:none;border-radius:5px;background-color:#007bff;color:#fff;cursor:pointer;width:100%;margin-top:5px;transition:background-color .3s}.add-session-button:hover{background-color:#0056b3}.delete-session-button{border:none;background-color:transparent;color:red;cursor:pointer;margin-left:10px;font-weight:700}.chat-window{flex:1;display:flex;flex-direction:column;overflow:hidden}.messages{flex:1;display:flex;flex-direction:column;overflow-y:auto;padding:10px;border:1px solid #ddd;border-radius:5px;background-color:#fff}.message{margin:10px 0;padding:10px 15px;border-radius:10px;display:inline-block;max-width:70%;white-space:pre-wrap}.message.user{background-color:#007bff;color:#fff;margin-left:auto}.message.bot{background-color:#e7e7e7;color:#000;margin-right:auto}form{display:flex;margin-top:10px}textarea{flex:1;padding:10px;border:1px solid #ccc;border-radius:20px;margin-right:10px;font-size:14px;white-space:pre-wrap}textarea:focus{outline:none;border-color:#007bff}button{padding:10px 30px;border:none;border-radius:20px;background-color:#007bff;color:#fff;cursor:pointer;transition:background-color .3s}button:hover{background-color:#0056b3}h2{text-align:center;color:#333}*{margin:0;padding:0}