:root {
  --bg: #0b1020;
  --panel: rgba(15, 23, 42, 0.82);
  --panel-2: rgba(255,255,255,0.03);
  --border: rgba(255,255,255,0.09);
  --text: #f8fafc;
  --muted: #94a3b8;
  --accent: #8aa4ff;
  --accent-2: rgba(138,164,255,0.14);
  --ok: #4ade80;
  --warn: #fbbf24;
  --danger: #f87171;
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}
* { box-sizing: border-box; }
html, body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(138,164,255,0.12), transparent 28%),
    radial-gradient(circle at top right, rgba(255,255,255,0.05), transparent 20%),
    var(--bg);
  color: var(--text);
}
body { min-height: 100vh; }
button, input, select, textarea { font: inherit; }
button {
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text);
  border-radius: 14px;
  padding: 10px 14px;
  cursor: pointer;
  transition: 140ms ease;
}
button:hover { transform: translateY(-1px); background: rgba(255,255,255,0.08); }
button.primary { background: var(--accent-2); border-color: rgba(138,164,255,0.34); }
button.active { background: var(--accent-2); border-color: rgba(138,164,255,0.34); }
button.danger { color: #fecaca; border-color: rgba(248,113,113,0.28); }
button.small { padding: 7px 10px; border-radius: 12px; font-size: 12px; }
button:disabled { opacity: .55; cursor: not-allowed; transform: none; }
input, select, textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.03);
  color: var(--text);
  padding: 10px 12px;
}
textarea { min-height: 90px; resize: vertical; }
code, pre { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
#app { max-width: 1500px; margin: 0 auto; padding: 0 20px 28px; }
.header {
  position: sticky; top: 0; z-index: 20;
  margin: 0 -20px;
  padding: 0 20px;
  background: rgba(11,16,32,0.84);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 14px; min-height: 78px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 42px; height: 42px; border-radius: 15px; display: grid; place-items: center;
  border: 1px solid var(--border); background: rgba(255,255,255,0.04); color: var(--accent); font-weight: 800;
}
.brand h1 { margin: 0; font-size: 16px; }
.brand p { margin: 2px 0 0; color: var(--muted); font-size: 12px; }
.header-actions, .row, .toolbar, .tab-row, .pill-row, .inline-actions { display: flex; gap: 10px; }
.header-actions, .toolbar, .tab-row, .pill-row { flex-wrap: wrap; }
main { padding-top: 20px; display: grid; gap: 18px; }
.hero {
  display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(280px, .9fr); gap: 16px;
  padding: 22px; border-radius: 24px; border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(138,164,255,0.10), rgba(255,255,255,0.03));
}
.hero h2 { margin: 0 0 8px; font-size: 28px; }
.hero p { margin: 0; color: var(--muted); line-height: 1.6; }
.kpis { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 10px; }
.kpi {
  border: 1px solid var(--border); border-radius: 18px; padding: 14px;
  background: rgba(255,255,255,0.03);
}
.kpi strong { display: block; font-size: 20px; }
.kpi span { font-size: 12px; color: var(--muted); }
.panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 22px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.16);
}
.panel-header {
  padding: 16px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
}
.panel-body { padding: 16px 18px; display: grid; gap: 14px; }
.panel-title { font-weight: 700; font-size: 14px; }
.panel-subtitle { color: var(--muted); font-size: 12px; margin-top: 2px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px; }
.grid-3 { display: grid; grid-template-columns: 290px minmax(0,1fr) 330px; gap: 16px; }
.stack { display: grid; gap: 16px; }
.label { display: grid; gap: 6px; }
.label span { color: var(--muted); font-size: 12px; }
.list { display: grid; gap: 10px; }
.card, .list-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px 14px;
  background: rgba(255,255,255,0.03);
}
.list-item.active { border-color: rgba(138,164,255,0.34); background: rgba(138,164,255,0.10); }
.list-item h4, .list-item p { margin: 0; }
.list-item p { margin-top: 4px; color: var(--muted); font-size: 12px; }
.badge, .status {
  display: inline-flex; align-items: center; gap: 8px; padding: 6px 10px; border-radius: 999px;
  border: 1px solid var(--border); font-size: 12px; background: rgba(255,255,255,0.04);
}
.status.valid { color: #bbf7d0; border-color: rgba(74,222,128,0.24); }
.status.warning, .status.incomplete { color: #fde68a; border-color: rgba(251,191,36,0.22); }
.status.blocked { color: #fecaca; border-color: rgba(248,113,113,0.24); }
.muted { color: var(--muted); }
.small { color: var(--muted); font-size: 12px; }
.empty {
  padding: 14px; border-radius: 16px; border: 1px dashed rgba(255,255,255,0.12);
  color: var(--muted);
}
.issue {
  padding: 10px 12px; border-radius: 14px; border: 1px solid var(--border);
}
.issue.error { color: #fecaca; border-color: rgba(248,113,113,0.24); background: rgba(248,113,113,0.07); }
.issue.warning { color: #fde68a; border-color: rgba(251,191,36,0.22); background: rgba(251,191,36,0.06); }
.tabs { display: flex; gap: 8px; flex-wrap: wrap; }
.workflow-tab { min-width: 126px; text-align: left; }
.workflow-tab strong { display: block; font-size: 13px; }
.workflow-tab span { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }
.tab-shell { display: grid; gap: 16px; }
.canvas-wrap {
  position: relative; min-height: 460px; border: 1px dashed rgba(255,255,255,0.12); border-radius: 20px;
  background:
    linear-gradient(rgba(255,255,255,0.02), rgba(255,255,255,0.03)),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: auto, 24px 24px, 24px 24px;
  overflow: hidden;
}
.edge-line {
  position: absolute; height: 2px; background: rgba(138,164,255,0.45); transform-origin: left center; z-index: 1;
}
.node-card {
  position: absolute; width: 210px; border: 1px solid var(--border); border-radius: 18px;
  background: rgba(15,23,42,0.94); box-shadow: 0 12px 26px rgba(0,0,0,0.22); z-index: 2;
}
.node-card.selected { border-color: rgba(138,164,255,0.4); box-shadow: 0 0 0 1px rgba(138,164,255,0.14), 0 12px 26px rgba(0,0,0,0.25); }
.node-head {
  padding: 12px 12px 8px; border-bottom: 1px solid rgba(255,255,255,0.05); cursor: grab; user-select: none;
}
.node-head h4 { margin: 0; font-size: 13px; }
.node-head p { margin: 4px 0 0; color: var(--muted); font-size: 11px; }
.port-strip { display: grid; gap: 6px; padding: 10px 12px 12px; }
.port { display: flex; justify-content: space-between; gap: 8px; font-size: 11px; color: var(--muted); }
.form-grid { display: grid; gap: 10px; }
.trace-step { padding: 12px; border-radius: 14px; border: 1px solid var(--border); background: rgba(255,255,255,0.03); }
.trace-step.active { border-color: rgba(138,164,255,0.34); background: rgba(138,164,255,0.10); }
pre {
  margin: 0; padding: 14px; border-radius: 16px; border: 1px solid var(--border);
  background: rgba(2,6,23,0.75); overflow: auto; max-height: 520px; white-space: pre-wrap; word-break: break-word;
}
.footer-note { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; }
.hidden { display: none !important; }
@media (max-width: 1180px) {
  .grid-3, .grid-2, .hero { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  #app { padding: 0 12px 22px; }
  .header { margin: 0 -12px; padding: 0 12px; }
  .header-inner { flex-direction: column; align-items: stretch; padding: 12px 0; }
  .workflow-tab { min-width: auto; flex: 1 1 140px; }
}