:root {
  --bg: #0d1117;
  --bg-2: #161b22;
  --bg-3: #1c2330;
  --border: #2a3240;
  --fg: #e6edf3;
  --muted: #8b949e;
  --accent: #58a6ff;
  --green: #3fb950;
  --yellow: #d29922;
  --red: #f85149;
  --purple: #bc8cff;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 14px;
}

body { display: flex; flex-direction: column; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 18px;
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { display: flex; align-items: center; gap: 12px; }
.logo {
  display: grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, #1f6feb, #8957e5);
  font-size: 20px;
}
.title { font-weight: 650; letter-spacing: 0.2px; }
.sub { color: var(--muted); font-size: 12px; font-family: var(--mono); }
.spacer { flex: 1; }

.status {
  padding: 5px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.4px;
  border: 1px solid var(--border);
  background: var(--bg-3);
}
.status.running { color: var(--accent); border-color: #1f6feb55; background: #1f6feb1a; }
.status.paused { color: var(--yellow); border-color: #d2992255; background: #d299221a; }
.status.waiting-answer { color: var(--purple); border-color: #bc8cff55; background: #bc8cff1a; }
.status.done { color: var(--green); border-color: #3fb95055; background: #3fb9501a; }
.status.done-with-errors, .status.error { color: var(--red); border-color: #f8514955; background: #f851491a; }
.status.aborted { color: var(--yellow); border-color: #d2992255; background: #d299221a; }

.controls { display: flex; gap: 8px; }
button {
  font: inherit;
  font-size: 13px;
  color: var(--fg);
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 7px;
  padding: 7px 12px;
  cursor: pointer;
  transition: background 0.12s, border-color 0.12s;
}
button:hover { background: #232c3a; border-color: #3a4456; }
button.danger { color: #ffb4ae; border-color: #f8514955; }
button.danger:hover { background: #f851491a; }
button.primary { background: #1f6feb; border-color: #1f6feb; color: #fff; }
button.primary:hover { background: #2f7cf6; }
button:disabled { opacity: 0.45; cursor: not-allowed; }

/* ---------- stats ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
.stat {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 12px;
  min-width: 0;
}
.stat .k { color: var(--muted); font-size: 11px; text-transform: uppercase; letter-spacing: 0.5px; }
.stat .v { font-size: 18px; font-weight: 650; margin-top: 3px; font-family: var(--mono); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.stat .v small { font-size: 12px; color: var(--muted); font-weight: 400; }
.bar { height: 6px; border-radius: 4px; background: #263041; margin-top: 8px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: linear-gradient(90deg, #1f6feb, #8957e5); }

/* ---------- main ---------- */
main {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(360px, 44%) 1fr;
  gap: 14px;
  padding: 14px 18px 18px;
}
.panel {
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
}
.panel h2 {
  margin: 0;
  padding: 12px 14px;
  font-size: 13px;
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-2);
}
.hint { color: var(--muted); font-weight: 400; font-size: 11px; }
.hint b { color: var(--accent); }

/* ---------- iterations ---------- */
.iterations { overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; }
.iter {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--bg-3);
  padding: 11px 12px;
}
.iter.running { border-color: #1f6feb88; box-shadow: 0 0 0 1px #1f6feb33 inset; }
.iter.failed { border-color: #f8514977; }
.iter .head { display: flex; align-items: baseline; gap: 8px; }
.iter .num { font-family: var(--mono); color: var(--muted); font-size: 12px; }
.iter .topic { font-weight: 600; flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { font-size: 11px; padding: 2px 8px; border-radius: 999px; border: 1px solid var(--border); color: var(--muted); }
.badge.completed { color: var(--green); border-color: #3fb95055; }
.badge.failed { color: var(--red); border-color: #f8514955; }
.badge.interrupted { color: var(--yellow); border-color: #d2992255; }
.badge.running { color: var(--accent); border-color: #1f6feb55; }
.iter .meta { display: flex; flex-wrap: wrap; gap: 4px 14px; margin-top: 7px; color: var(--muted); font-size: 12px; font-family: var(--mono); }
.iter .stage { margin-top: 6px; font-size: 12px; }
.iter .stage .lbl { color: var(--muted); }
.iter .summary { margin-top: 7px; color: #c9d1d9; font-size: 12.5px; line-height: 1.45; }
.iter .files { margin-top: 7px; display: flex; flex-wrap: wrap; gap: 5px; }
.chip { font-family: var(--mono); font-size: 11px; background: #202a38; border: 1px solid var(--border); border-radius: 6px; padding: 2px 7px; color: #a5b3c4; }
.iter .bar { margin-top: 8px; }
.qlist { margin: 7px 0 0; padding-left: 16px; color: var(--purple); font-size: 12px; }
.empty { color: var(--muted); padding: 16px; text-align: center; }

/* ---------- log ---------- */
.log {
  flex: 1;
  overflow-y: auto;
  padding: 12px 14px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.55;
  white-space: pre-wrap;
  word-break: break-word;
}
.log .line { padding: 1px 0; }
.log .t { color: #4d5866; margin-right: 8px; }
.log .section {
  color: var(--purple);
  font-weight: 650;
  border-top: 1px solid #232c3a;
  margin-top: 8px;
  padding-top: 6px;
}
.log .tool { color: var(--accent); }
.log .metric { color: var(--muted); }
.log .agent { color: #d5dee7; }
.log .reasoning { color: #6e7681; font-style: italic; }
.log .warn { color: var(--yellow); }
.log .error { color: var(--red); }
.log .answer { color: var(--green); }
.log .system { color: #6cb6ff; }
.log .stderr { color: #b98a00; }

/* ---------- modal ---------- */
.modal {
  position: fixed;
  inset: 0;
  background: #000000aa;
  display: grid;
  place-items: center;
  z-index: 50;
  backdrop-filter: blur(2px);
}
.modal.hidden { display: none; }
.modal-card {
  width: min(680px, 92vw);
  max-height: 86vh;
  overflow-y: auto;
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px 22px;
}
.modal-card h3 { margin: 0 0 4px; }
.muted { color: var(--muted); margin: 0 0 14px; font-size: 12.5px; }
.q { margin-bottom: 14px; }
.q label { display: block; margin-bottom: 6px; font-weight: 550; }
.q .opts { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 6px; }
.q input[type="text"] {
  width: 100%;
  font: inherit;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 9px 11px;
}
.q input[type="text"]:focus { outline: none; border-color: var(--accent); }
.modal-actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 6px; }

@media (max-width: 980px) {
  .stats { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  main { grid-template-columns: 1fr; }
}