:root { --bg:#f8fafc; --fg:#0f172a; --muted:#64748b; --card:#fff; --line:#e2e8f0; --accent:#2563eb; --user:#dbeafe; --bot:#f1f5f9; --warn:#f59e0b; --err:#dc2626; }
@media (prefers-color-scheme: dark) { :root { --bg:#0b1120; --fg:#e2e8f0; --muted:#94a3b8; --card:#111827; --line:#1f2937; --accent:#3b82f6; --user:#1e3a8a; --bot:#1f2937; } }
* { box-sizing:border-box; }
html,body { margin:0; height:100%; }
body { font:15px/1.5 system-ui,-apple-system,Segoe UI,Roboto,sans-serif; background:var(--bg); color:var(--fg); display:flex; flex-direction:column; }
.staging-bar { background:var(--warn); color:#111; text-align:center; font-weight:700; font-size:12px; letter-spacing:.05em; padding:3px; }
.top { display:flex; justify-content:space-between; align-items:center; padding:10px 16px; border-bottom:1px solid var(--line); background:var(--card); gap:12px; flex-wrap:wrap; }
.brand { display:flex; align-items:center; gap:10px; } .brand h1 { font-size:18px; margin:0; }
.badge { background:var(--warn); color:#111; font-size:11px; font-weight:700; padding:2px 8px; border-radius:999px; }
.meta { display:flex; gap:12px; align-items:center; color:var(--muted); font-size:13px; }
.model { font-family:ui-monospace,monospace; border:1px solid var(--line); padding:2px 8px; border-radius:6px; }
main { flex:1; display:flex; flex-direction:column; min-height:0; width:100%; max-width:900px; margin:0 auto; padding:16px; }
.card { background:var(--card); border:1px solid var(--line); border-radius:12px; padding:24px; max-width:380px; margin:40px auto; width:100%; }
.card h2 { margin-top:0; }
label { display:block; margin-bottom:12px; font-size:13px; color:var(--muted); }
input, textarea { width:100%; font:inherit; color:var(--fg); background:var(--bg); border:1px solid var(--line); border-radius:8px; padding:10px; margin-top:4px; }
button { font:inherit; background:var(--accent); color:#fff; border:0; border-radius:8px; padding:9px 16px; cursor:pointer; }
button:disabled { opacity:.6; cursor:wait; }
button.ghost { background:transparent; color:var(--fg); border:1px solid var(--line); }
.error { color:var(--err); min-height:1.2em; font-size:13px; }
[hidden] { display:none !important; }
#chat-view { flex:1; display:flex; flex-direction:column; min-height:0; }
.model:empty { display:none; }
.messages { flex:1; overflow-y:auto; display:flex; flex-direction:column; gap:10px; padding:4px 0 12px; }
.msg { max-width:85%; padding:10px 14px; border-radius:12px; white-space:pre-wrap; word-wrap:break-word; }
.msg.user { align-self:flex-end; background:var(--user); }
.msg.assistant { align-self:flex-start; background:var(--bot); }
.msg.error { align-self:center; background:transparent; color:var(--err); border:1px solid var(--err); font-size:13px; }
.msg.pending { opacity:.6; font-style:italic; }
.empty { color:var(--muted); text-align:center; margin:auto; }
.notice { background:rgba(245,158,11,.15); border:1px solid var(--warn); border-radius:8px; padding:8px 12px; font-size:13px; margin-bottom:10px; }
.composer { border-top:1px solid var(--line); padding-top:12px; }
.actions { display:flex; justify-content:space-between; margin-top:8px; }