body {margin:0;font-family:Arial;background:#0b0b0b;color:white;}
header{text-align:center;padding:15px;background:#111;color:#d4af37;}
.screen{display:none;padding:15px;}
.screen.active{display:block;}
.card{background:#151515;padding:15px;border-radius:10px;}
.msg{margin:10px 0;padding:10px;border-radius:8px;}
.user{background:#1e1e1e;text-align:right;}
.bot{background:#222;border-left:3px solid #d4af37;}
.inputBox{position:fixed;bottom:60px;width:100%;display:flex;}
input{flex:1;padding:10px;}
nav{position:fixed;bottom:0;width:100%;display:flex;background:#111;justify-content:space-around;}