:root{--bg:#0b1220;--card:#0f1724;--accent:#00aaff;--muted:#9aa4b2;}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,Arial;background:linear-gradient(180deg,#071021 0%,#0b1220 100%);color:#e6eef6}
.topbar{padding:16px;text-align:center}
.container{max-width:800px;margin:24px auto;padding:16px}
.chat-window{min-height:400px;border:1px solid rgba(255,255,255,0.06);padding:16px;border-radius:8px;background:rgba(255,255,255,0.02);overflow:auto}
.message{padding:10px 14px;margin-bottom:10px;border-radius:10px;max-width:80%}
.message.user{background:linear-gradient(90deg,#064e3b,#047857);margin-left:auto}
.message.bot{background:rgba(255,255,255,0.03);border:1px solid rgba(255,255,255,0.02)}
.chat-form{display:flex;gap:8px;margin-top:12px}
.chat-form input{flex:1;padding:10px;border-radius:8px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:inherit}
.chat-form button{padding:10px 14px;border-radius:8px;border:none;background:var(--accent);color:#04263a}
.footer{text-align:center;padding:12px;opacity:0.7}