:root {
  --bg: #0a0b14;
  --bg-2: #11131f;
  --surface: rgba(255,255,255,0.03);
  --surface-strong: rgba(255,255,255,0.06);
  --surface-hi: rgba(255,255,255,0.09);
  --fg: rgba(255,255,255,0.92);
  --fg-2: rgba(255,255,255,0.72);
  --muted: rgba(255,255,255,0.48);
  --muted-2: rgba(255,255,255,0.28);
  --edge-hi: rgba(255,255,255,0.08);
  --edge-lo: rgba(0,0,0,0.35);
  --hairline: rgba(255,255,255,0.05);
  --hairline-strong: rgba(255,255,255,0.08);
  --accent: #a78bfa;
  --accent-2: #c4b5fd;
  --accent-glow: rgba(167,139,250,0.35);
  --accent-soft: rgba(167,139,250,0.12);
  --danger: #f87171;
  --danger-soft: rgba(248,113,113,0.12);
  --warn: #fbbf24;
  --warn-soft: rgba(251,191,36,0.14);
  --workflow: #f59e0b;
  --workflow-soft: rgba(245,158,11,0.12);
  --workflow-strong: rgba(245,158,11,0.28);
  --user-bubble: rgba(167,139,250,0.08);
  --user-bubble-border: rgba(167,139,250,0.18);
  --asst-bubble: rgba(255,255,255,0.025);
  --asst-bubble-border: rgba(255,255,255,0.06);
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: ui-monospace, 'JetBrains Mono', 'IBM Plex Mono', 'SF Mono', Menlo, monospace;
  --text-xs: 11px;
  --text-sm: 12px;
  --text-base: 13px;
  --text-md: 14px;
  --row-h: 88px;
  --row-h-session: 64px;
  --row-h-compact: 28px;
  --col-sidebar: 220px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html, body { height: 100%; overflow: hidden; }
body {
  color: var(--fg);
  font: var(--text-base)/1.4 var(--font-sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  background-color: var(--bg);
  background-image:
    radial-gradient(80% 60% at 100% 0%, rgba(236, 72, 153, 0.14), transparent 55%),
    radial-gradient(60% 50% at 50% 40%, rgba(167, 139, 250, 0.12), transparent 60%),
    radial-gradient(70% 60% at 0% 100%, rgba(99, 102, 241, 0.16), transparent 60%),
    linear-gradient(to bottom, var(--bg) 0%, var(--bg-2) 100%);
}
body::before {
  content: '';
  position: fixed; inset: 0;
  pointer-events: none; z-index: 1;
  opacity: 0.3;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/><feColorMatrix values='0 0 0 0 1  0 0 0 0 1  0 0 0 0 1  0 0 0 0.05 0'/></filter><rect width='100%' height='100%' filter='url(%23n)'/></svg>");
  mix-blend-mode: overlay;
}
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; padding: 0; }
button:disabled { cursor: not-allowed; }
input { font: inherit; color: inherit; }
::selection { background: var(--accent-soft); color: var(--fg); }
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.08); border-radius: 4px; border: 2px solid transparent; background-clip: padding-box; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.16); background-clip: padding-box; border: 2px solid transparent; }

.titlebar {
  height: 32px; width: 100%;
  -webkit-app-region: drag;
  background: rgba(0,0,0,0.15);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--hairline);
  flex-shrink: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center;
  padding: 0 16px 0 78px;
}
.titlebar-text {
  font-size: var(--text-sm);
  color: var(--muted);
  font-weight: 500;
  letter-spacing: -0.005em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  max-width: 100%; user-select: none; pointer-events: none;
  display: inline-block;
}
.titlebar-text .app-name { color: var(--fg-2); font-weight: 600; }
.titlebar-text .sep { margin: 0 6px; color: var(--muted-2); }
.titlebar-text .scope { color: var(--muted); }
.titlebar-text .scope-leaf { color: var(--fg-2); font-family: var(--font-mono); font-size: 11.5px; }

button, input, .row, .sidebar-item, .toolbar-btn,
.row-action, .row-checkbox, .crumb, .provenance-link,
.banner-action, .source-toggle, .anchor-link,
.session-link, .msg-tool, .toolcall-toggle,
.agent-indicator, .agent-row, .filter-toggle,
.summary-toggle {
  -webkit-app-region: no-drag;
}

.app { position: relative; z-index: 2; height: 100vh; display: flex; flex-direction: column; }
.columns { flex: 1; display: grid; grid-template-columns: var(--col-sidebar) 1fr; min-height: 0; }