/* Steps List */
.steps-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.step-item {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 16px;
  position: relative;
}

.step-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: 30px;
  bottom: -12px;
  width: 2px;
  height: 12px;
  background: var(--border);
}

.step-item .step-header {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.step-item .step-number {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
  flex-shrink: 0;
  margin-top: 2px;
}

.step-item .step-info {
  flex: 1;
  min-width: 0;
}

.step-item .step-name {
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 4px;
}

.step-item .step-description {
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.step-item .step-actions {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
}

.step-item .step-btn {
  background: var(--bg-lighter);
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 5px 10px;
  border-radius: 4px;
  font-size: 12px;
  cursor: pointer;
}

.step-item .step-btn:hover {
  background: var(--border);
  color: var(--text);
}

.step-item .step-btn.step-run-btn {
  background: var(--accent);
  border-color: var(--accent);
  color: white;
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease,
    color 0.2s ease,
    opacity 0.2s ease;
}

.step-item .step-btn.step-run-btn:hover {
  background: var(--accent-hover);
}

.step-item .step-btn.step-run-btn.stop-btn {
  background: var(--error);
  border-color: var(--error);
}

.step-item .step-btn.step-run-btn.stop-btn:hover {
  background: #dc2626;
  border-color: #dc2626;
}

/* Duration badge inline with step name */
.step-duration-badge {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
  margin-left: 8px;
}

/* Collapsible detail section (Data + Run/Code/@ buttons) */
.step-detail-section {
  margin-top: 10px;
}

.step-detail-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  padding: 6px 0;
  list-style: none;
  user-select: none;
}

.step-detail-toggle::-webkit-details-marker {
  display: none;
}

.step-detail-toggle-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.step-detail-toggle-label::before {
  content: '▸ ';
  font-size: 10px;
}

.step-detail-section[open] .step-detail-toggle-label::before {
  content: '▾ ';
}

/* Step Code View */
.step-item .step-code {
  margin-top: 12px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.step-item .step-code.t-collapsed {
  pointer-events: none;
}

.step-item .step-code .code-header {
  padding: 8px 12px;
  background: var(--bg-lighter);
  border-bottom: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.step-item .step-code .code-filename {
  font-family: 'SF Mono', Monaco, monospace;
}

.step-item .step-code pre {
  margin: 0;
  padding: 12px;
  overflow-x: auto;
  max-height: 400px;
  overflow-y: auto;
}

.step-item .step-code code {
  font-family: 'SF Mono', Monaco, monospace;
  font-size: 13px;
  line-height: 1.5;
  color: var(--text);
  background: none;
  padding: 0;
}

/* Step Runtime Info (for workflow/iterate steps) */
.step-runtime-info {
  padding: 16px;
}

.step-runtime-info .runtime-badge {
  display: inline-block;
  padding: 4px 10px;
  background: var(--accent);
  color: white;
  border-radius: 12px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
}

.step-runtime-info .runtime-detail {
  display: flex;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
}

.step-runtime-info .runtime-label {
  color: var(--text-muted);
  min-width: 100px;
}

.step-runtime-info .runtime-value {
  color: var(--text);
  font-family: 'SF Mono', Monaco, monospace;
  background: var(--bg-lighter);
  padding: 2px 8px;
  border-radius: 4px;
}

.step-runtime-info .runtime-note {
  margin-top: 12px;
  font-size: 12px;
  color: var(--text-muted);
  font-style: italic;
}

/* Step Status Indicators */
.step-item.pending .step-number {
  background: var(--bg-lighter);
  color: var(--text-muted);
}

.step-item.running .step-number {
  background: var(--accent);
}

.step-item.success .step-number {
  background: var(--success);
}

.step-item.error .step-number {
  background: var(--error);
}

/* Step Build Overlay — grays out unbuilt steps and blocks interaction */
.step-build-overlay {
  position: absolute;
  inset: 0;
  background: color-mix(in srgb, var(--bg-light) 70%, transparent);
  border-radius: 8px;
  z-index: 10;
  pointer-events: all;
}

.step-build-overlay.building {
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--bg-light) 60%, transparent);
}

.step-build-overlay.building .spinner {
  width: 24px;
  height: 24px;
}

/* Step Result Display */
.step-result {
  margin-top: 12px;
}