/* ============================================
   Steps Diagram Block
   ============================================ */

.steps-diagram-block {
  margin: 1.5rem 0;
  user-select: none;
}

.steps-diagram {
  background: #f8f9fc;
  border: 1px solid #e2e5ef;
  border-radius: 10px;
  padding: 1rem 1.25rem;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  color: #374151;
}

/* ---- Header ---- */
.steps-diagram-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid #e5e7eb;
}

.steps-diagram-header-left {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.steps-diagram-header-title {
  font-weight: 600;
  font-size: 0.9rem;
  color: #1f2937;
  letter-spacing: 0.01em;
}

.steps-diagram-header-count {
  font-size: 0.78rem;
  color: #6b7280;
  background: #e5e7eb;
  border-radius: 10px;
  padding: 0.15rem 0.55rem;
}

.steps-diagram-header-author {
  font-size: 0.72rem;
  color: #9ca3af;
  font-style: italic;
}

/* ---- DAG Layout ---- */
.steps-diagram-dag {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

.steps-diagram-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  justify-content: center;
  width: 100%;
}

/* ---- Arrow between groups ---- */
.steps-diagram-arrow {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.15rem 0;
}

.steps-diagram-arrow-line {
  width: 2px;
  height: 16px;
  background: #cbd5e1;
}

.steps-diagram-arrow-head {
  width: 0;
  height: 0;
  border-left: 5px solid transparent;
  border-right: 5px solid transparent;
  border-top: 6px solid #cbd5e1;
}

/* ---- Step Card ---- */
.steps-diagram-card {
  flex: 1 1 180px;
  max-width: 280px;
  background: #ffffff;
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  padding: 0.65rem 0.8rem;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
  animation: stepCardAppear 0.35s ease-out both;
}

@keyframes stepCardAppear {
  from {
    opacity: 0;
    transform: translateY(8px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.steps-diagram-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.steps-diagram-card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.3rem;
}

.steps-diagram-card-name {
  font-weight: 600;
  font-size: 0.85rem;
  color: #1f2937;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}

.steps-diagram-card-desc {
  font-size: 0.78rem;
  color: #6b7280;
  margin: 0.2rem 0 0.4rem 0;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.steps-diagram-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.72rem;
  color: #9ca3af;
}

.steps-diagram-card-index {
  font-weight: 500;
}

.steps-diagram-card-progress {
  color: #d97706;
  font-style: italic;
}

.steps-diagram-card-time {
  color: #6b7280;
}

/* ---- Status Badge ---- */
.steps-diagram-status-badge {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  padding: 0.12rem 0.45rem;
  border-radius: 9px;
  white-space: nowrap;
  flex-shrink: 0;
}

.steps-diagram-status-badge--pending {
  background: #f3f4f6;
  color: #6b7280;
}

.steps-diagram-status-badge--ready {
  background: #dbeafe;
  color: #2563eb;
}

.steps-diagram-status-badge--running {
  background: #fef3c7;
  color: #d97706;
  animation: statusPulse 2s ease-in-out infinite;
}

.steps-diagram-status-badge--completed {
  background: #d1fae5;
  color: #059669;
}

.steps-diagram-status-badge--failed {
  background: #fee2e2;
  color: #dc2626;
}

.steps-diagram-status-badge--skipped {
  background: repeating-linear-gradient(
    45deg,
    #f3f4f6,
    #f3f4f6 4px,
    #e5e7eb 4px,
    #e5e7eb 8px
  );
  color: #9ca3af;
}

/* ---- Status-specific Card Borders ---- */
.steps-diagram-card--pending {
  border-left: 3px solid #d1d5db;
}

.steps-diagram-card--ready {
  border-left: 3px solid #3b82f6;
}

.steps-diagram-card--running {
  border-left: 3px solid #f59e0b;
  animation: cardGlow 2s ease-in-out infinite;
}

.steps-diagram-card--completed {
  border-left: 3px solid #10b981;
}

.steps-diagram-card--failed {
  border-left: 3px solid #ef4444;
}

.steps-diagram-card--skipped {
  border-left: 3px solid #d1d5db;
  opacity: 0.7;
}

/* ---- Animations ---- */
@keyframes statusPulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.65;
  }
}

@keyframes cardGlow {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(245, 158, 11, 0);
  }
  50% {
    box-shadow: 0 0 8px 2px rgba(245, 158, 11, 0.15);
  }
}

/* ---- Loading State ---- */
.steps-diagram-loading {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  padding: 1rem 0;
  color: #9ca3af;
  font-size: 0.85rem;
}

.steps-diagram-spinner {
  width: 16px;
  height: 16px;
  border: 2px solid #e5e7eb;
  border-top-color: #6b7280;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- Planning State ---- */
.steps-diagram-planning {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 0;
  color: #6b7280;
  font-size: 0.85rem;
  font-style: italic;
}

.steps-diagram-planning-dots {
  display: flex;
  gap: 4px;
}

.steps-diagram-planning-dots span {
  width: 6px;
  height: 6px;
  background: #9ca3af;
  border-radius: 50%;
  animation: dotBounce 1.4s ease-in-out infinite;
}

.steps-diagram-planning-dots span:nth-child(2) {
  animation-delay: 0.2s;
}

.steps-diagram-planning-dots span:nth-child(3) {
  animation-delay: 0.4s;
}

@keyframes dotBounce {
  0%, 80%, 100% {
    transform: scale(0.6);
    opacity: 0.4;
  }
  40% {
    transform: scale(1);
    opacity: 1;
  }
}

/* ---- Empty / Error ---- */
.steps-diagram-empty {
  padding: 1rem 0;
  color: #9ca3af;
  font-size: 0.85rem;
  text-align: center;
}

.steps-diagram-error {
  padding: 0.75rem;
  background: #fef2f2;
  border: 1px solid #fecaca;
  border-radius: 6px;
  color: #dc2626;
  font-size: 0.82rem;
}

/* ---- Responsive ---- */
@media (max-width: 640px) {
  .steps-diagram {
    padding: 0.75rem;
  }

  .steps-diagram-card {
    flex: 1 1 100%;
    max-width: 100%;
  }
}