:root {
  color-scheme: dark;
  --bg-app: #0b0d10;
  --bg-panel: #111318;
  --bg-raised: #171a21;
  --bg-input: #0f1217;
  --border-default: #2a2f3a;
  --border-subtle: #1d222b;
  --text-primary: #f4f7fb;
  --text-secondary: #9aa4b2;
  --text-muted: #6f7785;
  --accent-primary: #7c8cff;
  --accent-secondary: #4cc9f0;
  --success: #35c98b;
  --warning: #f0b84b;
  --error: #ff5c7a;
  --off: #4a5260;
  --radius: 8px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg-app);
  color: var(--text-primary);
  font-size: 13px;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  display: grid;
  grid-template-columns: 248px minmax(580px, 1fr) 360px;
  grid-template-rows: 44px minmax(0, 1fr) 240px;
  grid-template-areas:
    "topbar topbar topbar"
    "rail workspace inspector"
    "bottom bottom bottom";
  height: 100vh;
  overflow: hidden;
}

.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 12px;
  border-bottom: 1px solid var(--border-default);
  background: linear-gradient(180deg, #11141a 0%, #0e1015 100%);
}

.brand,
.topbar-center,
.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.brand-mark {
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border: 1px solid #394154;
  border-radius: 7px;
  background: linear-gradient(135deg, #202638, #111318 70%);
  color: var(--accent-secondary);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
  font-weight: 700;
}

.brand-title {
  font-weight: 650;
  line-height: 1.1;
}

.brand-subtitle,
.recipe-label {
  color: var(--text-muted);
  font-size: 11px;
}

.recipe-input {
  width: 260px;
  height: 28px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: var(--bg-input);
  color: var(--text-primary);
  padding: 0 9px;
}

.primary-button,
.icon-button {
  height: 28px;
  border-radius: 6px;
  border: 1px solid var(--border-default);
  background: var(--bg-raised);
  color: var(--text-primary);
  padding: 0 10px;
}

.primary-button {
  border-color: #5562cb;
  background: linear-gradient(135deg, #29327d, #171a21);
  color: #eef1ff;
}

.status-badge,
.node-kind,
.pill {
  display: inline-flex;
  align-items: center;
  height: 20px;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  padding: 0 8px;
  color: var(--text-secondary);
  background: #11151c;
  font-size: 11px;
}

.status-badge.valid {
  color: var(--success);
  border-color: rgba(53, 201, 139, 0.38);
}

.status-badge.invalid {
  color: var(--error);
  border-color: rgba(255, 92, 122, 0.45);
}

.layer-rail,
.inspector,
.bottom-panel {
  background: var(--bg-panel);
}

.layer-rail {
  grid-area: rail;
  border-right: 1px solid var(--border-default);
  padding: 12px 8px;
  overflow: auto;
}

.rail-section-label,
.panel-title,
.eyebrow {
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
}

.layer-list {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-top: 10px;
}

.layer-row {
  display: grid;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 8px;
  min-height: 36px;
  border: 1px solid transparent;
  border-radius: 7px;
  padding: 5px 7px;
  color: var(--text-secondary);
  background: transparent;
  text-align: left;
}

.layer-row:hover {
  background: #141820;
}

.layer-row.active {
  border-color: rgba(124, 140, 255, 0.5);
  background: linear-gradient(135deg, rgba(124, 140, 255, 0.14), rgba(76, 201, 240, 0.04));
  color: var(--text-primary);
}

.layer-row.diagnostic {
  margin-left: 16px;
  grid-template-columns: 30px 1fr auto;
}

.layer-id {
  color: var(--accent-secondary);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
}

.layer-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.layer-status {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--off);
}

.layer-status.on,
.layer-status.edited {
  background: var(--success);
}

.layer-status.invalid {
  background: var(--error);
}

.layer-status.off {
  background: var(--off);
}

.workspace {
  grid-area: workspace;
  min-width: 0;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at 30% 0%, rgba(124, 140, 255, 0.08), transparent 32%), var(--bg-app);
}

.workspace-header {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
}

.workspace-header h1 {
  margin: 2px 0 0;
  font-size: 16px;
  line-height: 1.2;
}

.workspace-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.workspace-body {
  position: relative;
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 14px;
}

.contract-flow {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  gap: 12px;
  min-height: 100%;
}

.flow-legend {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 11px;
}

.flow-legend span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.legend-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
}

.legend-dot.optional {
  background: var(--off);
}

.legend-dot.dag {
  background: var(--warning);
}

.legend-dot.diagnostic {
  background: transparent;
  border: 1px dashed var(--text-muted);
}

.flow-lanes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(146px, 1fr));
  gap: 10px;
  align-content: start;
  min-width: 0;
}

.flow-card,
.form-section,
.contract-card {
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  background: rgba(17, 19, 24, 0.86);
}

.flow-card {
  position: relative;
  min-height: 154px;
  padding: 12px;
  color: var(--text-primary);
  text-align: left;
}

.flow-card:hover,
.flow-diagnostic:hover {
  border-color: rgba(124, 140, 255, 0.5);
  background: #151922;
}

.flow-card.focused,
.flow-diagnostic.focused {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px rgba(124, 140, 255, 0.28);
}

.flow-card.off {
  color: var(--text-muted);
  background: rgba(17, 19, 24, 0.55);
}

.flow-card.dag {
  border-color: rgba(240, 184, 75, 0.38);
}

.flow-card-head,
.flow-facts {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.flow-card-head {
  justify-content: space-between;
}

.flow-id {
  color: var(--accent-secondary);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
  font-weight: 700;
}

.flow-title {
  margin-top: 14px;
  font-weight: 700;
  line-height: 1.25;
}

.flow-role {
  margin-top: 7px;
  min-height: 35px;
  color: var(--text-secondary);
  font-size: 12px;
  line-height: 1.4;
}

.flow-facts {
  margin-top: 12px;
}

.flow-facts span {
  min-height: 20px;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  padding: 3px 7px;
  color: var(--text-secondary);
  background: #0f1217;
  font-size: 11px;
}

.flow-diagnostic {
  display: grid;
  gap: 4px;
  min-height: 56px;
  border: 1px dashed var(--border-default);
  border-radius: 7px;
  background: rgba(13, 16, 21, 0.74);
  color: var(--text-secondary);
  padding: 8px;
  text-align: left;
}

.flow-diagnostic span:first-child {
  color: var(--accent-secondary);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
}

.flow-diagnostic.off {
  opacity: 0.62;
}

.focus-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  background: rgba(17, 19, 24, 0.88);
  padding: 14px 16px;
}

.focus-strip h2 {
  margin: 2px 0 5px;
  font-size: 16px;
}

.focus-strip p {
  margin: 0;
  color: var(--text-secondary);
  line-height: 1.4;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(260px, 1fr));
  gap: 12px;
}

.form-section {
  padding: 12px;
}

.form-section h2 {
  margin: 0 0 12px;
  font-size: 14px;
}

.field {
  display: grid;
  gap: 5px;
  margin-bottom: 11px;
}

.field label {
  color: var(--text-secondary);
  font-size: 12px;
}

.field label span {
  color: var(--text-muted);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 10px;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  min-height: 30px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: var(--bg-input);
  color: var(--text-primary);
  padding: 6px 8px;
}

.field textarea {
  min-height: 70px;
  resize: vertical;
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 12px;
}

.field-hint {
  color: var(--text-muted);
  font-size: 11px;
}

.field-description {
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.35;
}

.field-code {
  color: var(--text-muted);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 10px;
}

.choice-help {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

.choice-help span {
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: #0f1217;
  color: var(--text-muted);
  padding: 2px 6px;
  font-size: 10px;
}

.toggle-line {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.switch {
  position: relative;
  width: 42px;
  height: 22px;
}

.switch input {
  display: none;
}

.switch span {
  position: absolute;
  inset: 0;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: #20242e;
}

.switch span::after {
  content: "";
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: transform 120ms ease, background 120ms ease;
}

.switch input:checked + span {
  border-color: rgba(124, 140, 255, 0.7);
  background: #28306b;
}

.switch input:checked + span::after {
  transform: translateX(20px);
  background: var(--accent-secondary);
}

.dag-shell {
  position: absolute;
  inset: 14px;
  border: 1px solid var(--border-default);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    #0d1015;
  background-size: 24px 24px;
}

.dag-help {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 176px;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 34px;
  border: 1px solid var(--border-subtle);
  border-radius: 7px;
  background: rgba(13, 16, 21, 0.92);
  color: var(--text-secondary);
  padding: 7px 9px;
  font-size: 12px;
}

.dag-help strong {
  color: var(--text-primary);
}

.dag-palette {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 246px;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dag-guide-panel {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 10px;
  z-index: 3;
  display: grid;
  grid-template-columns: minmax(220px, 0.9fr) minmax(360px, 1.6fr);
  gap: 12px;
  max-height: 150px;
  overflow: auto;
  border: 1px solid var(--border-default);
  border-radius: 7px;
  background: rgba(13, 16, 21, 0.95);
  padding: 10px;
}

.dag-guide-main h2 {
  margin: 3px 0 6px;
  font-size: 14px;
}

.dag-guide-main p,
.dag-guide-list li {
  margin: 0;
  color: var(--text-secondary);
  font-size: 11px;
  line-height: 1.35;
}

.dag-guide-default {
  margin-top: 7px !important;
  color: var(--accent-secondary) !important;
}

.dag-guide-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.dag-guide-list {
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  background: #0f1217;
  padding: 7px;
}

.dag-guide-list h3 {
  margin: 0 0 5px;
  color: var(--text-primary);
  font-size: 11px;
}

.dag-guide-list ol {
  margin: 0;
  padding-left: 16px;
}

@media (max-width: 1280px) {
  .dag-guide-panel {
    grid-template-columns: 1fr;
  }

  .dag-guide-columns {
    grid-template-columns: repeat(3, minmax(130px, 1fr));
  }
}

.dag-template-bar {
  position: absolute;
  left: 12px;
  right: 12px;
  top: 214px;
  z-index: 3;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.template-button {
  min-height: 26px;
  border: 1px solid rgba(124, 140, 255, 0.5);
  border-radius: 6px;
  background: rgba(41, 50, 125, 0.6);
  color: #eef1ff;
  padding: 0 8px;
  font-size: 11px;
}

.palette-button {
  min-height: 26px;
  border: 1px solid var(--border-default);
  border-radius: 6px;
  background: #121721;
  color: var(--text-secondary);
  padding: 0 8px;
  font-size: 11px;
}

.palette-button:hover {
  border-color: rgba(124, 140, 255, 0.6);
  color: var(--text-primary);
}

.dag-canvas {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.edge-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.dag-node {
  position: absolute;
  width: 190px;
  min-height: 74px;
  border: 1px solid var(--border-default);
  border-radius: 8px;
  background: #141820;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
  overflow: hidden;
  user-select: none;
}

.dag-node.selected {
  border-color: var(--accent-primary);
  box-shadow: 0 0 0 1px rgba(124, 140, 255, 0.35), 0 16px 30px rgba(0, 0, 0, 0.28);
}

.dag-node.invalid {
  border-color: var(--error);
}

.node-strip {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--accent-primary);
}

.dag-node.source .node-strip {
  background: var(--accent-secondary);
}

.dag-node.combine .node-strip {
  background: var(--warning);
}

.dag-node.sink .node-strip {
  background: var(--success);
}

.node-content {
  padding: 10px 10px 10px 14px;
}

.node-title {
  font-weight: 650;
  margin-bottom: 6px;
}

.node-meta {
  color: var(--text-muted);
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
  font-size: 11px;
}

.node-help {
  margin-top: 6px;
  color: var(--text-muted);
  font-size: 11px;
  line-height: 1.3;
}

.node-ports {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
}

.port-button {
  height: 22px;
  border: 1px solid var(--border-default);
  border-radius: 999px;
  background: #0f1217;
  color: var(--text-secondary);
  padding: 0 8px;
  font-size: 11px;
}

.port-button.connecting {
  border-color: var(--accent-secondary);
  color: var(--accent-secondary);
}

.edge-list {
  display: grid;
  gap: 6px;
  color: var(--text-muted);
  font-size: 11px;
}

.edge-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  background: #0f1217;
  padding: 6px 7px;
}

.edge-remove {
  min-height: 22px;
  border: 1px solid var(--border-default);
  border-radius: 5px;
  background: var(--bg-raised);
  color: var(--text-secondary);
  font-size: 11px;
}

.inspector {
  grid-area: inspector;
  border-left: 1px solid var(--border-default);
  padding: 12px;
  overflow: auto;
}

.inspector-body {
  margin-top: 12px;
}

.bottom-panel {
  grid-area: bottom;
  border-top: 1px solid var(--border-default);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

.tabs {
  height: 34px;
  display: flex;
  align-items: end;
  gap: 2px;
  padding: 0 10px;
  border-bottom: 1px solid var(--border-subtle);
}

.tab {
  height: 28px;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 6px 6px 0 0;
  background: transparent;
  color: var(--text-secondary);
  padding: 0 10px;
}

.tab.active {
  border-color: var(--border-default);
  background: var(--bg-app);
  color: var(--text-primary);
}

.bottom-body {
  flex: 1;
  min-height: 0;
  overflow: auto;
  padding: 10px 12px;
  background: var(--bg-app);
}

pre,
.mono {
  font-family: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;
}

pre {
  margin: 0;
  color: #dce3f2;
  line-height: 1.45;
  font-size: 12px;
  white-space: pre-wrap;
}

.issue {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 10px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.issue-level.error {
  color: var(--error);
}

.issue-level.warning {
  color: var(--warning);
}

.issue-level.info {
  color: var(--accent-secondary);
}

.empty-state {
  color: var(--text-muted);
  padding: 20px;
  text-align: center;
}

@media (max-width: 1180px) {
  .app-shell {
    grid-template-columns: 72px minmax(520px, 1fr) 320px;
  }

  .layer-row {
    grid-template-columns: 1fr;
  }

  .layer-name,
  .layer-status {
    display: none;
  }

  .layer-row.diagnostic {
    margin-left: 0;
  }
}