:root {
  color-scheme: dark;
  --bg: #07101d;
  --bg-2: #0b1524;
  --panel: rgba(11, 18, 32, 0.94);
  --panel-2: rgba(18, 28, 45, 0.92);
  --panel-3: rgba(10, 16, 29, 0.98);
  --border: rgba(81, 119, 188, 0.28);
  --border-strong: rgba(96, 153, 255, 0.45);
  --text: #e7eefc;
  --muted: #8d9bb5;
  --muted-2: #a8b4ca;
  --cyan: #4bd8ff;
  --mint: #54f3bf;
  --green: #4df0bb;
  --amber: #e8a33b;
  --purple: #a176ff;
  --blue: #7aa6ff;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
  --radius: 18px;
  --radius-sm: 12px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --serif: Iowan Old Style, Palatino Linotype, Book Antiqua, Georgia, serif;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--text);
  background:
    radial-gradient(circle at 15% 15%, rgba(28, 75, 139, 0.28), transparent 26%),
    radial-gradient(circle at 85% 20%, rgba(42, 102, 195, 0.18), transparent 30%),
    linear-gradient(180deg, #07101c 0%, #091322 42%, #07111f 100%);
}

button, textarea { font: inherit; }

button {
  min-height: 54px;
  padding: 0 18px;
  border: 1px solid rgba(98, 118, 157, 0.34);
  background: linear-gradient(180deg, rgba(30, 38, 58, 0.96), rgba(24, 30, 47, 0.96));
  color: var(--text);
  border-radius: 10px;
  cursor: pointer;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-family: var(--mono);
  font-size: 0.94rem;
  transition: transform 140ms ease, box-shadow 140ms ease, border-color 140ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px);
  border-color: rgba(111, 160, 255, 0.55);
  box-shadow: 0 0 0 1px rgba(94, 151, 255, 0.1), 0 12px 28px rgba(0, 0, 0, 0.22);
}

button:disabled { opacity: 0.42; cursor: not-allowed; }

button.primary {
  background: linear-gradient(180deg, rgba(87, 243, 191, 0.96), rgba(74, 223, 176, 0.96));
  color: #05110f;
  border-color: rgba(112, 255, 209, 0.8);
  box-shadow: 0 0 24px rgba(84, 243, 191, 0.16), inset 0 1px 0 rgba(255,255,255,0.28);
  font-weight: 700;
}

button.primary--large { min-width: 244px; }
button:focus-visible, textarea:focus-visible, .app-shell:focus-visible {
  outline: 2px solid rgba(102, 210, 255, 0.9);
  outline-offset: 3px;
}

.app-shell {
  width: min(1400px, 100%);
  margin: 0 auto;
  padding: 28px 26px 36px;
}

.hero-bar {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 22px;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--cyan);
  text-transform: uppercase;
  letter-spacing: 0.22em;
  font-size: 0.76rem;
  font-family: var(--mono);
}

.hero-bar h1 {
  margin: 0;
  font-size: clamp(1.7rem, 2.8vw, 2.45rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
}

.hero-copy {
  margin: 10px 0 0;
  color: var(--muted-2);
  max-width: 760px;
}

.hero-copy code {
  font-family: var(--mono);
  color: var(--mint);
  background: rgba(18, 30, 49, 0.8);
  padding: 0.15rem 0.35rem;
  border-radius: 0.35rem;
}

.hero-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.source-panel {
  margin-bottom: 22px;
  padding: 18px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(13, 22, 38, 0.96), rgba(9, 16, 29, 0.97));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.source-panel__header {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  margin-bottom: 12px;
}

.source-panel h2 { margin: 0 0 4px; font-size: 1.15rem; }
.source-panel p { margin: 0; color: var(--muted); }

#diagram-source {
  width: 100%;
  min-height: 260px;
  resize: vertical;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(88, 124, 189, 0.28);
  background: rgba(4, 9, 18, 0.92);
  color: var(--text);
  font-family: var(--mono);
  font-size: 13px;
  line-height: 1.55;
}

.status {
  min-height: 1.3em;
  margin: 10px 0 0;
  color: var(--muted);
}

.status.error { color: #ff8f86; }

.participant-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-bottom: 18px;
}

.participant-card {
  padding: 18px 18px 16px;
  border-radius: 14px;
  background: linear-gradient(180deg, rgba(37, 43, 60, 0.92), rgba(31, 36, 51, 0.9));
  border: 1px solid rgba(97, 111, 139, 0.2);
  box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.participant-card__title-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.participant-card__icon {
  position: relative;
  width: 54px;
  height: 54px;
  border-radius: 12px;
  background: rgba(9, 17, 30, 0.82);
  border: 1px solid rgba(85, 111, 167, 0.18);
  flex: none;
}

.participant-card__icon::before,
.participant-card__icon::after {
  content: "";
  position: absolute;
}

.participant-card__icon--orchestrator::before {
  inset: 14px 18px 14px 18px;
  border: 2px solid currentColor;
  border-radius: 4px;
  box-shadow:
    -11px 9px 0 -2px transparent,
    11px 9px 0 -2px transparent;
}

.participant-card__icon--orchestrator::after {
  width: 10px;
  height: 10px;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%) rotate(45deg);
  border: 2px solid currentColor;
  background: transparent;
}

.participant-card__icon--ledger::before {
  width: 22px;
  height: 12px;
  left: 50%;
  top: 10px;
  transform: translateX(-50%);
  border: 2px solid currentColor;
  border-radius: 50%;
}

.participant-card__icon--ledger::after {
  width: 22px;
  height: 24px;
  left: 50%;
  top: 16px;
  transform: translateX(-50%);
  border-left: 2px solid currentColor;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  border-radius: 0 0 50% 50% / 0 0 22% 22%;
}

.participant-card__icon--orchestrator { color: var(--mint); }
.participant-card__icon--ledger-a { color: #ffc34d; }
.participant-card__icon--ledger-b { color: var(--cyan); }
.participant-card__icon--ledger-c { color: #b47cff; }
.participant-card__icon--generic { color: var(--blue); }

.participant-card__title {
  margin: 0;
  font-family: var(--mono);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
}

.participant-card__subtitle {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.92rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 14px;
  border-radius: 8px;
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid rgba(106, 143, 219, 0.25);
}

.status-pill::before {
  content: "";
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 12px currentColor;
  flex: none;
}

.status-pill--mint {
  color: var(--mint);
  background: rgba(62, 114, 99, 0.34);
}
.status-pill--amber {
  color: #f2ad3f;
  background: rgba(108, 81, 40, 0.42);
}
.status-pill--cyan {
  color: #38d6ff;
  background: rgba(44, 83, 104, 0.42);
}
.status-pill--purple {
  color: #8c93ba;
  background: rgba(3, 9, 22, 0.82);
}
.status-pill--idle {
  color: #7f95bd;
  background: rgba(17, 25, 40, 0.58);
}

.panel {
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(8, 14, 28, 0.98), rgba(7, 12, 23, 0.98));
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}

.panel--glow {
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.02),
    0 0 0 1px rgba(36, 68, 132, 0.08),
    0 16px 40px rgba(0,0,0,0.32);
}

.diagram-stage {
  margin-bottom: 18px;
}

.diagram-stage__inner {
  overflow: auto;
  min-height: 560px;
  padding: 24px;
  border-radius: inherit;
}

.grid-bg {
  position: relative;
  background:
    linear-gradient(rgba(19, 37, 69, 0.18) 1px, transparent 1px),
    linear-gradient(90deg, rgba(19, 37, 69, 0.18) 1px, transparent 1px),
    radial-gradient(circle at 50% 0%, rgba(16, 40, 86, 0.22), transparent 45%),
    linear-gradient(180deg, rgba(4, 8, 18, 0.9), rgba(4, 7, 16, 0.98));
  background-size: 34px 34px, 34px 34px, 100% 100%, 100% 100%;
}

.diagram {
  min-width: 980px;
}

.diagram svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: none !important;
}

.diagram .actor,
.diagram .actor-top,
.diagram .actor-bottom {
  fill: rgba(15, 24, 40, 0.92) !important;
  stroke: rgba(97, 148, 231, 0.55) !important;
  rx: 14px;
}

.diagram .actor-line {
  stroke: rgba(132, 180, 255, 0.46) !important;
  stroke-width: 2px !important;
  stroke-dasharray: 10 10 !important;
}

.diagram .messageLine0,
.diagram .messageLine1,
.diagram .loopLine,
.diagram .labelBox,
.diagram .activation0,
.diagram .activation1,
.diagram .note {
  stroke: rgba(111, 151, 226, 0.55) !important;
}

.diagram .messageText,
.diagram .actor text,
.diagram text,
.diagram .labelText,
.diagram .loopText,
.diagram .noteText,
.diagram .sequenceNumber {
  font-family: var(--mono) !important;
}

.diagram .messageText,
.diagram .actor text,
.diagram .labelText,
.diagram .loopText,
.diagram .noteText,
.diagram .sequenceNumber {
  fill: rgba(198, 213, 244, 0.92) !important;
}

.diagram .labelBox,
.diagram .activation0,
.diagram .activation1,
.diagram .note {
  fill: rgba(16, 27, 43, 0.82) !important;
}

.diagram [data-sequence-step-state] {
  transition: opacity 160ms ease, filter 160ms ease, stroke 160ms ease, fill 160ms ease;
}

.diagram [data-sequence-step-state="future"] {
  opacity: 0.12 !important;
}

.diagram [data-sequence-step-state="past"] {
  opacity: 0.34 !important;
}

.diagram [data-sequence-step-state="current"] {
  opacity: 1 !important;
}

.diagram [data-sequence-step-state="current"][data-sequence-step-role="line"] {
  stroke: var(--mint) !important;
  stroke-width: 3.5px !important;
  filter: drop-shadow(0 0 11px rgba(84, 243, 191, 0.58));
}

.diagram [data-sequence-step-state="current"][data-sequence-step-role="text"],
.diagram [data-sequence-step-state="current"][data-sequence-step-role="number"] {
  fill: var(--mint) !important;
  font-weight: 700 !important;
  filter: drop-shadow(0 0 8px rgba(84, 243, 191, 0.34));
}

.detail-card {
  padding: 22px 24px 20px;
}

.detail-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 20px;
}

.detail-card__title-row {
  display: flex;
  gap: 16px;
  align-items: center;
}

.step-badge {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 1.4rem;
  color: var(--mint);
  border: 2px solid rgba(84, 243, 191, 0.72);
  box-shadow: 0 0 18px rgba(84, 243, 191, 0.28);
  background: rgba(11, 38, 34, 0.45);
  flex: none;
}

.detail-card h2 {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(1.4rem, 2.1vw, 2rem);
  font-weight: 400;
  line-height: 1.15;
}

.muted { margin: 5px 0 0; color: var(--muted); }

.tag-chip,
.metric-chip {
  display: inline-flex;
  align-items: center;
  min-height: 50px;
  padding: 0 18px;
  border-radius: 8px;
  border: 1px solid rgba(84, 243, 191, 0.28);
  font-family: var(--mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  white-space: nowrap;
}

.tag-chip {
  background: rgba(34, 112, 87, 0.34);
  color: var(--mint);
}

.signature-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  margin-top: 18px;
}

.signature-block,
.metric-chip {
  min-height: 64px;
  display: flex;
  align-items: center;
  border-radius: 8px;
  background: rgba(4, 8, 18, 0.88);
  border: 1px solid rgba(78, 102, 156, 0.24);
}

.signature-block {
  padding: 0 14px;
  font-family: var(--mono);
  color: var(--mint);
  font-size: clamp(1rem, 1.65vw, 1.15rem);
  overflow-wrap: anywhere;
}

.metric-chip {
  justify-content: center;
  min-width: 158px;
  color: #91a7cb;
}

.detail-copy {
  margin: 16px 0 0;
  color: #b4c0d5;
  font-size: clamp(1.06rem, 1.7vw, 1.2rem);
  line-height: 1.55;
}

.control-bar {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  align-items: center;
  margin-top: 18px;
}

.control-bar__group {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.control-bar__group--right {
  justify-content: flex-end;
}

@media (max-width: 1080px) {
  .detail-card__header,
  .control-bar {
    flex-direction: column;
    align-items: stretch;
  }

  .control-bar__group--right {
    justify-content: flex-start;
  }
}

@media (max-width: 720px) {
  .app-shell { padding: 16px 14px 28px; }
  .hero-bar,
  .source-panel__header { flex-direction: column; }
  .hero-actions { width: 100%; }
  .hero-actions button { flex: 1 1 180px; }
  .detail-card { padding: 18px 16px; }
  .signature-row { grid-template-columns: 1fr; }
  .participant-strip { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; }
  .diagram [data-sequence-step-state] { transition: none; }
  button { transition: none; }
}