/* Black metallic + liquid glass theme */
:root{
  --bg1:#0b0b0d;
  --bg2:#0f1113;
  --glass-bg: rgba(255,255,255,0.06);
  --glass-border: rgba(255,255,255,0.12);
  --accent: #7efcff;
  --accent2: #9b8cff;
}
html,body{height:100%;margin:0;font-family:Inter,Segoe UI,Roboto,Arial,sans-serif;color:#e6eef6}
body{
  background: radial-gradient(1200px 600px at 10% 20%, rgba(130,140,150,0.06), transparent 10%),
              linear-gradient(180deg,var(--bg1),var(--bg2));
  -webkit-font-smoothing:antialiased;
  display:flex;align-items:center;justify-content:center;padding:32px;
}
/* metal sheen animation */
.shimmer{
  position:relative;overflow:hidden;
}
.shimmer:before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(115deg, rgba(255,255,255,0.02) 0%, rgba(255,255,255,0.06) 50%, rgba(255,255,255,0.02) 100%);
  transform:translateX(-110%);
  animation: sheen 4s linear infinite;
}
@keyframes sheen{to{transform:translateX(110%)}}
/* glass card */
.card{
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:14px;
  box-shadow:0 6px 30px rgba(0,0,0,0.65), inset 0 1px 0 rgba(255,255,255,0.02);
  backdrop-filter: blur(10px) saturate(120%);
  -webkit-backdrop-filter: blur(10px) saturate(120%);
  padding:20px;max-width:980px;width:100%;
}
.center{width:420px}
.header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}
.logo{font-weight:700;letter-spacing:0.6px}
.small{font-size:12px;opacity:0.8}
input,select,button,textarea{font-size:15px;padding:10px 12px;border-radius:10px;border:1px solid rgba(255,255,255,0.06);background:transparent;color:inherit}
input::placeholder{color:rgba(230,238,246,0.45)}
.btn{background:linear-gradient(90deg,var(--accent),var(--accent2));color:#051018;border:none;cursor:pointer}
.btn.ghost{background:transparent;border:1px solid rgba(255,255,255,0.06);color:var(--accent)}
.nav{display:flex;gap:8px}
.container{display:grid;grid-template-columns:1fr 360px;gap:16px}
.section{margin-bottom:16px}
.chat-window{height:360px;overflow:auto;padding:12px;border-radius:10px;background:linear-gradient(180deg, rgba(255,255,255,0.02), rgba(0,0,0,0.1));}
.message{margin-bottom:10px;padding:8px;border-radius:8px}
.message.user{background:linear-gradient(90deg, rgba(126,252,255,0.08), rgba(155,140,255,0.04));text-align:right}
.message.bot{background:rgba(255,255,255,0.02)}
.footer{display:flex;gap:8px;margin-top:8px}
.code{font-family:Consolas,monospace;background:rgba(0,0,0,0.35);padding:6px;border-radius:6px;color:#ffd89b}
/* responsive */
@media(max-width:900px){.container{grid-template-columns:1fr}.center{width:100%}}