*{box-sizing:border-box}body{margin:0;background:#080812;color:#eee;font-family:Inter,Arial}#app{display:flex;height:100vh}aside{width:260px;background:#11111d;padding:20px}main{flex:1;padding:30px}#chat{height:80%;overflow:auto;background:#0d0d18;padding:20px;border-radius:20px}.user,.bot{padding:12px;border-radius:14px;margin:10px}.user{background:#5227ff}.bot{background:#191927}textarea{width:80%;padding:15px;background:#111;color:white;border-radius:10px}