:root {
  --bg: #f4f6f8;
  --surface: #ffffff;
  --surface-2: #eef3f7;
  --text: #111827;
  --muted: #64748b;
  --border: #dce3ea;
  --accent: #1f7a8c;
  --accent-2: #b45309;
  --good: #12714f;
  --warn: #a16207;
  --bad: #b42318;
  --shadow: 0 10px 28px rgba(15, 23, 42, 0.08);
  --radius: 8px;
  font-family: Inter, "Noto Sans SC", "PingFang SC", system-ui, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--text); }
body { overflow-x: hidden; }
a { color: inherit; text-decoration: none; }
button, textarea { font: inherit; }

.topbar {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 0 22px;
  border-bottom: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.92);
  position: sticky;
  top: 0;
  z-index: 20;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 230px; }
.brand img { width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border); }
.brand strong { display: block; font-size: 16px; }
.brand small { display: block; color: var(--muted); font-size: 12px; margin-top: 2px; }
.topbar nav { display: flex; gap: 8px; }
.topbar nav a { padding: 8px 10px; border-radius: 8px; color: #334155; font-weight: 700; font-size: 13px; }
.topbar nav a:hover { background: var(--surface-2); }
.status-pill { border: 1px solid var(--border); background: var(--surface-2); border-radius: 999px; padding: 6px 10px; font-size: 12px; font-weight: 800; color: #334155; }

.shell {
  width: min(1680px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr) 320px;
  gap: 14px;
  padding: 14px;
}
.rail, .right { position: sticky; top: 78px; align-self: start; display: flex; flex-direction: column; gap: 8px; }
.rail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px;
  box-shadow: var(--shadow);
}
.rail-item {
  width: 100%;
  min-height: 38px;
  border: 0;
  background: transparent;
  border-radius: 7px;
  text-align: left;
  padding: 8px 10px;
  cursor: pointer;
  color: #475569;
  font-weight: 800;
}
.rail-item:hover, .rail-item.active { background: var(--surface-2); color: var(--text); }

.stage { min-width: 0; }
.view { display: none; }
.view.active { display: block; }
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 20px;
  background: linear-gradient(135deg, #ffffff 0%, #e9f3f5 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 14px;
}
.eyebrow { margin: 0 0 6px; color: var(--accent); font-size: 12px; font-weight: 900; letter-spacing: .16em; text-transform: uppercase; }
h1, h2 { margin: 0; letter-spacing: 0; }
h1 { font-size: clamp(28px, 4vw, 46px); line-height: 1.05; }
h2 { font-size: 15px; margin-bottom: 10px; }
.lead { color: #334155; max-width: 760px; line-height: 1.7; margin: 12px 0 0; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; align-self: end; }
.hero-metrics div { background: rgba(255,255,255,.7); border: 1px solid var(--border); border-radius: 8px; padding: 14px; }
.hero-metrics strong { display: block; font-size: 26px; }
.hero-metrics span { display: block; color: var(--muted); font-size: 12px; margin-top: 4px; }

.grid { display: grid; gap: 14px; margin-bottom: 14px; }
.cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.panel p { color: #334155; line-height: 1.65; margin: 0; }
.compact { padding: 14px; }
.panel-head { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; margin-bottom: 12px; }
.panel-head p { margin-top: 4px; color: var(--muted); }

.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
.tag {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 999px;
  padding: 3px 8px;
  font-size: 12px;
  font-weight: 800;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.tag.good { color: var(--good); background: #ecfdf3; border-color: #badbcc; }
.tag.warn { color: var(--warn); background: #fffbeb; border-color: #fde68a; }
.tag.bad { color: var(--bad); background: #fef3f2; border-color: #fecdca; }

.capability-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 10px; }
.cap-card { border: 1px solid var(--border); border-radius: 8px; background: #fbfcfd; padding: 12px; min-height: 92px; }
.cap-card strong { display: block; font-size: 13px; margin-bottom: 5px; }
.cap-card span { color: var(--muted); font-size: 12px; line-height: 1.45; }

.quick-tests { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 8px;
  padding: 9px 12px;
  font-weight: 800;
  cursor: pointer;
}
.btn:hover { background: var(--surface-2); }
.btn.primary { background: #111827; color: #fff; border-color: #111827; }
.chat-feed { min-height: 360px; max-height: 55vh; overflow: auto; border: 1px solid var(--border); border-radius: 8px; background: #fbfcfd; padding: 14px; margin-bottom: 12px; }
.msg { max-width: 86%; padding: 10px 12px; border-radius: 8px; margin-bottom: 10px; white-space: pre-wrap; line-height: 1.6; }
.msg.user { margin-left: auto; background: #e0f2fe; }
.msg.bot { background: #fff; border: 1px solid var(--border); }
.evidence { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 8px; white-space: normal; }
.evidence > span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; margin-bottom: 4px; }
.evidence ul { margin: 0; padding-left: 18px; }
.evidence li { margin: 5px 0; }
.evidence strong { display: block; font-size: 12px; }
.evidence span { color: var(--muted); font-size: 12px; line-height: 1.45; }
.trace { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 8px; white-space: normal; }
.trace > span { display: block; color: var(--muted); font-size: 12px; font-weight: 800; margin-bottom: 4px; }
.trace ol { margin: 0; padding-left: 18px; }
.trace li { margin: 4px 0; color: #334155; font-size: 12px; line-height: 1.45; }
.trace small { display: block; margin-top: 6px; color: var(--muted); }
.composer { display: grid; grid-template-columns: minmax(0, 1fr) 88px; gap: 10px; }
.composer textarea { resize: vertical; border: 1px solid var(--border); border-radius: 8px; padding: 12px; min-height: 74px; }

pre {
  white-space: pre-wrap;
  margin: 0;
  background: #0f172a;
  color: #e2e8f0;
  border-radius: 8px;
  padding: 12px;
  max-height: 420px;
  overflow: auto;
  font-size: 12px;
}
.seed-list, .recent-list, .env-grid { display: grid; gap: 8px; }
.seed-row, .recent-row, .env-row { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; align-items: start; padding: 10px; border: 1px solid var(--border); border-radius: 8px; background: #fbfcfd; }
.recent-row { grid-template-columns: minmax(0, 1fr); }
.seed-row strong, .recent-row strong { font-size: 13px; }
.seed-row span, .recent-row span { color: var(--muted); font-size: 12px; line-height: 1.5; }
.env-row code { font-weight: 800; }
.env-row.ok code { color: var(--good); }
.env-row.bad code { color: var(--bad); }

.kv { display: grid; grid-template-columns: 92px minmax(0, 1fr); gap: 8px 10px; margin: 0; }
.kv dt { color: var(--muted); font-size: 12px; }
.kv dd { margin: 0; font-weight: 800; font-size: 13px; }
.check-list { margin: 0; padding-left: 18px; color: #334155; line-height: 1.7; }
.dog-card { background: #d9dde2; border-radius: 20px; padding: 22px; text-align: center; color: #111827; }
.dog-card img { width: 100%; max-width: 220px; display: block; margin: 0 auto 8px; }
.dog-card strong { display: block; letter-spacing: .08em; }
.dog-card span { color: var(--muted); font-size: 12px; }

@media (max-width: 1180px) {
  .shell { grid-template-columns: 130px minmax(0, 1fr); }
  .right { position: static; grid-column: 1 / -1; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 760px) {
  .topbar { height: auto; align-items: flex-start; flex-direction: column; padding: 12px; }
  .topbar nav { flex-wrap: wrap; }
  .shell { grid-template-columns: 1fr; padding: 10px; }
  .rail { position: static; display: grid; grid-template-columns: repeat(5, 1fr); }
  .rail-item { text-align: center; padding: 8px 4px; font-size: 12px; }
  .cols-3, .cols-2, .right { grid-template-columns: 1fr; }
  .hero-metrics { grid-template-columns: 1fr; }
  .capability-grid { grid-template-columns: 1fr; }
  .composer { grid-template-columns: 1fr; }
}