:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --text: #1c2430;
  --muted: #5d6878;
  --border: #dde2ea;
  --accent: #2d5bd7;
  --user: #e8eefc;
  --openai: #0f7b5f;
  --gemini: #7b46c9;
  --error: #b42318;
  --code: #f1f3f6;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --panel: #1a1f27;
    --text: #e6e9ef;
    --muted: #9aa4b2;
    --border: #2c3440;
    --accent: #7ea0ff;
    --user: #22304d;
    --openai: #4cc79f;
    --gemini: #b997f2;
    --error: #ff8a80;
    --code: #232a35;
    color-scheme: dark;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
button {
  font: inherit;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--text);
  border-radius: 8px;
  padding: 6px 12px;
}
button:disabled { opacity: 0.5; cursor: default; }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 20px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
}
.brand { display: flex; gap: 12px; align-items: center; }
.brand h1 { margin: 0; font-size: 18px; }
.brand p { margin: 0; color: var(--muted); font-size: 13px; }
.logo {
  width: 34px; height: 34px; border-radius: 9px;
  display: grid; place-items: center;
  background: var(--accent); color: white; font-weight: 700;
}
.actions { display: flex; gap: 12px; align-items: center; }

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 16px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 16px;
  height: calc(100vh - 64px);
}
.chat {
  display: flex; flex-direction: column; min-height: 0;
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
}
.messages { flex: 1; overflow-y: auto; padding: 20px; }
.empty { max-width: 640px; margin: 40px auto; text-align: center; }
.empty h2 { margin-bottom: 4px; }
.suggestions { display: grid; gap: 8px; margin-top: 20px; }
.suggestion { text-align: left; }

.composer {
  display: flex; gap: 8px; padding: 12px; border-top: 1px solid var(--border);
}
.composer textarea {
  flex: 1; resize: vertical; min-height: 44px; max-height: 200px;
  font: inherit; padding: 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg); color: var(--text);
}
#send { background: var(--accent); color: white; border-color: var(--accent); padding: 0 18px; }

.turn { margin-bottom: 24px; }
.bubble { border-radius: 12px; padding: 12px 14px; max-width: 920px; }
.bubble.user {
  background: var(--user); margin-left: auto; width: fit-content; max-width: 80%;
  white-space: pre-wrap; margin-bottom: 10px;
}
.bubble.assistant { border: 1px solid var(--border); }
.status { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 13px; }
.status[hidden] { display: none; }
.spinner {
  width: 12px; height: 12px; border-radius: 50%;
  border: 2px solid var(--border); border-top-color: var(--accent);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
.answer { overflow-wrap: anywhere; }
.answer.streaming::after { content: "▍"; color: var(--accent); }
.answer.error { color: var(--error); }
.answer table { border-collapse: collapse; margin: 8px 0; font-size: 14px; }
.answer th, .answer td { border: 1px solid var(--border); padding: 4px 8px; text-align: left; }
.answer pre { background: var(--code); padding: 10px; border-radius: 8px; overflow-x: auto; }
.answer code { background: var(--code); padding: 1px 4px; border-radius: 4px; font-size: 13px; }
.answer pre code { background: none; padding: 0; }
.answer h1, .answer h2, .answer h3, .answer h4 { margin: 14px 0 6px; line-height: 1.3; }
.answer h1 { font-size: 20px; } .answer h2 { font-size: 18px; } .answer h3, .answer h4 { font-size: 16px; }

.cite {
  display: inline-block; font-size: 11px; line-height: 1.4; padding: 0 6px; margin: 0 1px;
  border-radius: 999px; background: var(--code); color: var(--accent);
  text-decoration: none; vertical-align: 1px; white-space: nowrap;
}
.cite.unverified { color: var(--muted); text-decoration: line-through; }

.routes { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.route {
  display: inline-flex; gap: 6px; align-items: center; font-size: 12px;
  border: 1px solid var(--border); border-radius: 999px; padding: 2px 10px; cursor: help;
}
.route .agent { font-weight: 600; }
.route.openai .provider { color: var(--openai); font-weight: 600; }
.route.gemini .provider { color: var(--gemini); font-weight: 600; }
.route .fallback { color: var(--error); font-weight: 600; }
.meta { margin-top: 8px; }

details { margin-top: 8px; font-size: 13px; }
summary { cursor: pointer; color: var(--muted); }
.sources, .trace { margin: 8px 0 0; padding-left: 22px; }
.sources li, .trace li { margin-bottom: 6px; }
.sources li:target { background: var(--user); border-radius: 6px; }
.snippet { color: var(--muted); display: block; font-size: 12px; }
.trace .node { font-weight: 600; }
.trace .reason { color: var(--muted); }
.tag { font-size: 11px; border: 1px solid var(--border); border-radius: 6px; padding: 0 5px; margin-left: 4px; }
.tag.error { color: var(--error); border-color: var(--error); }

.side {
  background: var(--panel); border: 1px solid var(--border); border-radius: 12px;
  padding: 14px 16px; overflow-y: auto; font-size: 14px;
}
.side h2 { font-size: 14px; margin: 4px 0 8px; }
.side h2:not(:first-child) { margin-top: 20px; }
.agent-card { border: 1px solid var(--border); border-radius: 8px; padding: 8px 10px; margin-bottom: 8px; }
.agent-card b { text-transform: capitalize; }
.tool { display: inline-block; font-size: 12px; background: var(--code); border-radius: 6px; padding: 0 6px; margin: 3px 3px 0 0; }
.tool.shared { outline: 1px solid var(--accent); }
.rules { width: 100%; border-collapse: collapse; font-size: 12px; }
.rules th, .rules td { text-align: left; padding: 3px 4px; border-bottom: 1px solid var(--border); }
.p-openai { color: var(--openai); }
.p-gemini { color: var(--gemini); }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; height: auto; padding: 8px; }
  .chat { height: calc(100vh - 80px); }
  .brand p { display: none; }
}