:root {
  --bg: #0a0a0f;
  --surface: #111827;
  --surface-2: #0f172a;
  --border: #374151;
  --border-soft: #1f2937;
  --text: #e5e7eb;
  --text-dim: #9ca3af;
  --text-faint: #6b7280;
  --accent: #00C875;
  --accent-soft: rgba(0, 200, 117, 0.12);
  --pass: #10B981;
  --warning: #F59E0B;
  --critical: #EF4444;
  --font-ui: 'Inter', system-ui, -apple-system, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  font-size: 15px;
  line-height: 1.5;
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

/* ---------- header ---------- */
.site-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 28px;
  border-bottom: 1px solid var(--border-soft);
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  color: var(--text);
}
.brand-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-soft);
}

.tool-badges {
  display: flex;
  gap: 8px;
  margin-left: auto;
}
.badge {
  font-size: 12px;
  font-weight: 500;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: var(--surface);
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.gh-link {
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  padding: 6px;
}
.gh-link:hover { color: var(--accent); text-decoration: none; }

/* ---------- layout ---------- */
.layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  padding: 28px;
  max-width: 1400px;
  margin: 0 auto;
}

.layout.in-session {
  grid-template-columns: minmax(360px, 1fr) minmax(380px, 480px);
  align-items: start;
}
.layout.in-session .landing { grid-column: 1 / -1; }
.layout.in-session .tab-panel { grid-column: 1; }
.layout.in-session .chat-col { grid-column: 2; }

/* ---------- landing ---------- */
.landing {
  opacity: 1;
  transition: opacity 300ms ease, max-height 300ms ease, margin 300ms ease;
  max-height: 2400px;
  overflow: hidden;
}
.landing.hidden {
  opacity: 0;
  max-height: 0;
  margin: 0;
  pointer-events: none;
}

.landing h1 {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.1;
  margin: 0 0 14px;
  letter-spacing: -0.02em;
  font-weight: 700;
}
.landing .subtitle {
  font-size: 17px;
  color: var(--text-dim);
  max-width: 640px;
  margin: 0 0 32px;
}
.landing strong { color: var(--text); font-weight: 600; }

.tool-pills {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 36px;
}
.tool-pills .pill {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 12px;
  padding: 16px;
}
.tool-pills .pill header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.tool-pills .pill p {
  margin: 0;
  font-size: 13px;
  color: var(--text-dim);
  line-height: 1.5;
}

.starters {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}
.starter {
  text-align: left;
  padding: 14px 16px;
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 10px;
  color: var(--text);
  font-size: 14px;
  transition: border-color 120ms ease, background 120ms ease;
}
.starter:hover { border-color: var(--accent); background: var(--accent-soft); }

/* ---------- chat ---------- */
.chat-col {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-height: 420px;
  position: sticky;
  top: 88px;
  max-height: calc(100vh - 116px);
}
.messages {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-right: 4px;
}
.bubble {
  padding: 10px 14px;
  border-radius: 10px;
  max-width: 92%;
  white-space: pre-wrap;
  word-wrap: break-word;
  font-size: 14.5px;
  line-height: 1.55;
}
.bubble.user {
  align-self: flex-end;
  background: var(--accent-soft);
  border: 1px solid rgba(0, 200, 117, 0.25);
  color: var(--text);
}
.bubble.agent {
  align-self: flex-start;
  background: var(--surface-2);
  border: 1px solid var(--border-soft);
}
.bubble.agent.streaming::after {
  content: "▍";
  color: var(--accent);
  animation: blink 1s steps(1) infinite;
  margin-left: 2px;
}
@keyframes blink { 50% { opacity: 0; } }

.composer {
  display: flex;
  gap: 8px;
  border-top: 1px solid var(--border-soft);
  padding-top: 12px;
}
.composer textarea {
  flex: 1;
  resize: none;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  color: var(--text);
  font-family: inherit;
  font-size: 14.5px;
  min-height: 42px;
  max-height: 140px;
}
.composer textarea:focus { outline: 1px solid var(--accent); border-color: var(--accent); }
.composer button {
  background: var(--accent);
  color: #06281a;
  font-weight: 600;
  padding: 0 18px;
  border-radius: 8px;
  align-self: stretch;
}
.composer button:disabled { opacity: 0.5; cursor: not-allowed; }

.composer-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-faint);
  font-family: var(--font-mono);
}
.status-pill {
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.status-pill.error { color: var(--critical); border-color: var(--critical); }

/* ---------- tabs ---------- */
.tab-panel {
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface);
  overflow: hidden;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 300ms ease, transform 300ms ease;
  pointer-events: none;
}
.tab-panel.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
.tabs {
  display: flex;
  border-bottom: 1px solid var(--border-soft);
  overflow-x: auto;
  background: var(--surface-2);
}
.tab {
  flex: 1;
  padding: 12px 16px;
  font-weight: 500;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
  font-size: 14px;
  min-width: 110px;
  transition: color 120ms ease, border-color 120ms ease;
}
.tab.active {
  color: var(--text);
  border-bottom-color: var(--accent);
}
.tab:hover { color: var(--text); }

.tab-content { padding: 18px; min-height: 320px; }
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ---------- tab content shared ---------- */
.section-h {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-faint);
  margin: 0 0 8px;
  font-weight: 600;
}
.kv {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 6px 12px;
  font-size: 13px;
  font-family: var(--font-mono);
  margin-bottom: 14px;
}
.kv dt { color: var(--text-faint); }
.kv dd { margin: 0; color: var(--text); word-break: break-all; }

.skeleton {
  background: linear-gradient(90deg, var(--surface-2), var(--border-soft), var(--surface-2));
  background-size: 200% 100%;
  animation: shimmer 1.4s ease-in-out infinite;
  border-radius: 6px;
  height: 14px;
}
.skeleton.lg { height: 22px; }
.skeleton-block { display: flex; flex-direction: column; gap: 8px; }
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

.pending-note {
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 10px;
}
.error-block {
  border: 1px solid rgba(239, 68, 68, 0.4);
  background: rgba(239, 68, 68, 0.08);
  padding: 14px;
  border-radius: 8px;
  font-size: 13px;
  color: var(--text);
}
.error-block .err-msg { font-family: var(--font-mono); color: var(--critical); margin: 6px 0 12px; word-break: break-word; }
.btn-retry {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
}
.btn-retry:hover { border-color: var(--accent); color: var(--accent); }

.setup-block {
  border: 1px dashed var(--border);
  padding: 16px;
  border-radius: 8px;
  background: var(--surface-2);
  font-size: 13.5px;
}
.setup-block code {
  font-family: var(--font-mono);
  background: rgba(255,255,255,0.05);
  padding: 1px 6px;
  border-radius: 4px;
}

/* ---------- trace pane ---------- */
.span-row {
  display: grid;
  grid-template-columns: 14px 1fr auto;
  gap: 10px;
  padding: 10px 12px;
  border: 1px solid var(--border-soft);
  border-radius: 8px;
  background: var(--surface-2);
  margin-bottom: 8px;
  font-size: 13px;
}
.span-dot {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  margin-top: 5px;
}
.span-dot.error { background: var(--critical); }
.span-dot.custom { background: var(--warning); }
.span-meta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 4px;
}
.span-name { font-weight: 500; }
.span-latency { color: var(--text-faint); font-family: var(--font-mono); font-size: 12px; align-self: start; }
details.span-detail { margin-top: 6px; }
details.span-detail summary { cursor: pointer; color: var(--accent); font-size: 12px; }
details.span-detail pre {
  background: var(--bg);
  border: 1px solid var(--border-soft);
  padding: 8px;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  overflow-x: auto;
  max-height: 240px;
  margin: 8px 0 0;
}

/* ---------- eval pane ---------- */
.eval-row { margin-bottom: 12px; }
.eval-label { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 4px; }
.eval-name { font-weight: 500; }
.eval-score { font-family: var(--font-mono); }
.eval-bar { background: var(--surface-2); border-radius: 999px; height: 8px; overflow: hidden; border: 1px solid var(--border-soft); }
.eval-bar-fill { height: 100%; border-radius: 999px; transition: width 300ms ease; }
.eval-rationale { font-size: 12.5px; color: var(--text-dim); margin: 6px 0 0; line-height: 1.45; }

.aggregate { display: flex; justify-content: space-between; align-items: center; margin-top: 10px; padding-top: 10px; border-top: 1px solid var(--border-soft); }
.aggregate strong { font-family: var(--font-mono); font-size: 16px; }

.turn-select {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  flex-wrap: wrap;
}
.turn-select button {
  border: 1px solid var(--border);
  background: var(--surface-2);
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-dim);
}
.turn-select button.active { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }

/* ---------- scan pane ---------- */
.scan-running { display: flex; flex-direction: column; align-items: flex-start; gap: 8px; }
.scan-dots {
  display: inline-block;
  font-family: var(--font-mono);
  color: var(--accent);
}
.scan-dots::after {
  display: inline-block;
  content: "";
  width: 18px;
  text-align: left;
  animation: dots 1.4s steps(4, end) infinite;
}
@keyframes dots {
  0%   { content: ""; }
  25%  { content: "."; }
  50%  { content: ".."; }
  75%  { content: "..."; }
}

.scan-summary {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 14px;
}
.scan-sev {
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  border: 1px solid var(--border);
  background: var(--surface-2);
}
.scan-sev.PASSED { color: var(--pass); border-color: rgba(16, 185, 129, 0.5); background: rgba(16,185,129,0.08); }
.scan-sev.INFO { color: var(--text-dim); }
.scan-sev.LOW { color: var(--text-dim); }
.scan-sev.MEDIUM { color: var(--warning); border-color: rgba(245, 158, 11, 0.5); background: rgba(245,158,11,0.08); }
.scan-sev.HIGH { color: var(--critical); border-color: rgba(239, 68, 68, 0.5); background: rgba(239,68,68,0.08); }
.scan-sev.CRITICAL { color: #fff; background: var(--critical); border-color: var(--critical); }

.scan-row {
  border: 1px solid var(--border-soft);
  background: var(--surface-2);
  border-radius: 8px;
  padding: 12px;
  margin-bottom: 8px;
  font-size: 13px;
}
.scan-row header { display: flex; gap: 8px; align-items: center; margin-bottom: 8px; }
.scan-row .module { font-weight: 500; }
.scan-row .variant { font-family: var(--font-mono); color: var(--text-dim); font-size: 12px; }
.scan-row .prompt, .scan-row .response {
  font-family: var(--font-mono);
  font-size: 12px;
  background: var(--bg);
  border: 1px solid var(--border-soft);
  padding: 8px;
  border-radius: 6px;
  margin: 4px 0;
  white-space: pre-wrap;
  word-wrap: break-word;
  max-height: 140px;
  overflow: auto;
}
.scan-row .reason { color: var(--text-dim); font-size: 12px; }

/* ---------- state pane ---------- */
.diff-col { display: grid; grid-template-columns: 1fr; gap: 6px; }
.diff-row {
  display: grid;
  grid-template-columns: 70px 1fr;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 6px;
  border: 1px solid var(--border-soft);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 12.5px;
}
.diff-tag {
  align-self: start;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 999px;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.diff-tag.added { background: rgba(16,185,129,0.15); color: var(--pass); border: 1px solid rgba(16,185,129,0.5); }
.diff-tag.removed { background: rgba(239,68,68,0.12); color: var(--critical); border: 1px solid rgba(239,68,68,0.5); }
.diff-tag.modified { background: rgba(245,158,11,0.12); color: var(--warning); border: 1px solid rgba(245,158,11,0.5); }
.diff-key { color: var(--text); }
.diff-value { color: var(--text-dim); margin-top: 4px; word-break: break-word; }
.diff-source {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-faint);
  margin-left: 6px;
}

/* ---------- busy overlay ---------- */
.busy-overlay {
  position: fixed; inset: 0;
  background: rgba(10, 10, 15, 0.86);
  display: flex; align-items: center; justify-content: center;
  z-index: 20;
}
.busy-overlay[hidden] { display: none; }
[hidden] { display: none !important; }
.busy-card {
  border: 1px solid var(--border);
  background: var(--surface);
  border-radius: 14px;
  padding: 28px;
  max-width: 420px;
  text-align: center;
}
.busy-card h2 { margin-top: 0; }
.busy-card p { color: var(--text-dim); }

/* ---------- responsive ---------- */
@media (max-width: 920px) {
  .layout.in-session { grid-template-columns: 1fr; }
  .chat-col { position: static; max-height: none; }
  .tool-pills { grid-template-columns: 1fr; }
  .starters { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
  .site-header { padding: 12px 16px; flex-wrap: wrap; }
  .tool-badges { order: 3; margin-left: 0; width: 100%; overflow-x: auto; padding-bottom: 4px; }
  .layout { padding: 16px; }
  .landing h1 { font-size: 28px; }
  .tabs .tab { min-width: 84px; padding: 10px 12px; font-size: 13px; }
  .tab-content { padding: 14px; }
  .span-row { grid-template-columns: 10px 1fr; }
  .span-latency { grid-column: 2 / 3; }
  .kv { grid-template-columns: 100px 1fr; }
}