:root {
  --bg: #f7f6f3;
  --surface: #ffffff;
  --text: #1c1b19;
  --muted: #6b6760;
  --border: #e3e0d9;
  --accent: #c2410c;
  --accent-text: #ffffff;
  --user: #f1ede6;
  --warn: #9a3412;
  --ok: #166534;
  --radius: 10px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #151412;
    --surface: #1e1c1a;
    --text: #ece9e3;
    --muted: #a19c93;
    --border: #34312d;
    --accent: #f97316;
    --accent-text: #1b0d03;
    --user: #2a2724;
    --warn: #fdba74;
    --ok: #86efac;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #151412; --surface: #1e1c1a; --text: #ece9e3; --muted: #a19c93; --border: #34312d;
  --accent: #f97316; --accent-text: #1b0d03; --user: #2a2724; --warn: #fdba74; --ok: #86efac; color-scheme: dark;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", sans-serif;
}
.bar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; border-bottom: 1px solid var(--border); background: var(--surface);
}
.brand { font-weight: 700; letter-spacing: 0.02em; }
.balance { font-variant-numeric: tabular-nums; color: var(--muted); }
.layout { display: grid; grid-template-columns: 320px 1fr; gap: 16px; padding: 16px; max-width: 1200px; margin: 0 auto; }
@media (max-width: 800px) { .layout { grid-template-columns: 1fr; } }
.panel, .chat { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; min-width: 0; }
.panel h2 { margin: 0 0 8px; font-size: 16px; }
label { display: block; font-size: 13px; color: var(--muted); margin: 10px 0 4px; }
.toggle { display: inline-flex; gap: 6px; align-items: center; margin: 0; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
textarea, input, select {
  width: 100%; font: inherit; color: var(--text); background: var(--bg);
  border: 1px solid var(--border); border-radius: 8px; padding: 8px;
}
textarea { resize: vertical; }
button {
  font: inherit; border: 1px solid var(--border); background: var(--bg); color: var(--text);
  border-radius: 8px; padding: 8px 14px; cursor: pointer;
}
button.primary { background: var(--accent); color: var(--accent-text); border-color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }
.row { display: flex; gap: 8px; margin-top: 10px; flex-wrap: wrap; }
.hint { color: var(--muted); font-size: 13px; margin: 0 0 6px; }
.msg { min-height: 1.5em; font-size: 13px; margin-top: 8px; }
.msg.err { color: var(--warn); }
.msg.ok { color: var(--ok); }
.refund, .keybox { margin-top: 12px; }
.keybox code { display: block; word-break: break-all; font-size: 12px; padding: 8px; background: var(--bg); border-radius: 8px; }
.chat { display: flex; flex-direction: column; min-height: 70vh; }
.controls { display: flex; gap: 12px; flex-wrap: wrap; align-items: center; }
.controls select { flex: 1 1 260px; width: auto; }
.modelinfo { color: var(--muted); font-size: 13px; margin: 8px 0; }
.log { flex: 1; overflow-y: auto; display: flex; flex-direction: column; gap: 10px; padding: 8px 0; }
.m { padding: 10px 12px; border-radius: var(--radius); white-space: pre-wrap; word-wrap: break-word; max-width: 100%; }
.m.user { background: var(--user); align-self: flex-end; max-width: 85%; }
.m.assistant { border: 1px solid var(--border); }
.m .meta { display: block; color: var(--muted); font-size: 12px; margin-top: 6px; }
.m.error { color: var(--warn); border: 1px solid var(--warn); }
.composer { display: flex; gap: 8px; margin-top: 8px; }
.composer textarea { flex: 1; }
.badge { display: inline-block; font-size: 11px; padding: 1px 6px; border-radius: 999px; border: 1px solid var(--border); margin-left: 4px; }
[hidden] { display: none !important; }
input[type="checkbox"] { width: auto; margin: 0; }
.toggle { white-space: nowrap; font-size: 14px; color: var(--text); }