.sequence-diagram-host {
  height: 560px;
  position: relative;
  overflow: hidden;
}

.sequence-diagram-host .diagram-canvas {
  width: 100%;
  height: 100%;
  background:
    linear-gradient(90deg, rgba(15, 23, 42, 0.04) 1px, transparent 1px),
    linear-gradient(rgba(15, 23, 42, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
}

.sequence-step-node {
  min-width: 160px;
  max-width: 220px;
  padding: 0.65rem 0.85rem 0.85rem;
  border-radius: 0.5rem;
  border: 1px solid #cbd5e1;
  background: #fff;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.06);
  position: relative;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.sequence-step-node--selected {
  border-color: #0d6efd !important;
  box-shadow: 0 0 0 2px rgba(13, 110, 253, 0.25);
}

.sequence-step-node--disabled {
  opacity: 0.45;
}

.sequence-step-node--initial {
  border-color: #64748b;
}

.sequence-step-node--noreply {
  border-color: #c2410c;
  background: #fff7ed;
}

.sequence-step-node--replied {
  border-color: #0f766e;
  background: #f0fdfa;
}

.sequence-step-node--final {
  border-color: #1e293b;
}

.sequence-step-node__title {
  font-size: 0.85rem;
  font-weight: 600;
  line-height: 1.25;
}

.sequence-step-node__day {
  margin-top: 0.25rem;
  font-size: 0.75rem;
  color: #64748b;
}

/* Connection ports: quiet until hover so they do not look like unexplained UI chrome */
.sequence-step-node .diagram-port,
.sequence-step-node .sequence-port {
  width: 10px;
  height: 10px;
  margin: -5px;
  border-radius: 50%;
  background: #94a3b8;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px #94a3b8;
  cursor: crosshair;
  position: absolute;
  opacity: 0.35;
  transition: opacity 0.12s ease, background 0.12s ease, transform 0.12s ease;
}

.sequence-step-node:hover .diagram-port,
.sequence-step-node:hover .sequence-port,
.sequence-step-node--selected .diagram-port,
.sequence-step-node--selected .sequence-port,
.sequence-step-node .diagram-port.has-links,
.sequence-step-node .sequence-port.has-links {
  opacity: 1;
}

.sequence-step-node .diagram-port:hover,
.sequence-step-node .sequence-port:hover {
  background: #0d6efd;
  box-shadow: 0 0 0 1px #0d6efd;
  transform: scale(1.15);
}

.sequence-step-node .diagram-port.top,
.sequence-step-node .sequence-port--top {
  top: 0;
  left: 50%;
  bottom: auto;
}

.sequence-step-node .diagram-port.bottom,
.sequence-step-node .sequence-port--bottom {
  bottom: 0;
  left: 50%;
  top: auto;
}

.sequence-timeline .sequence-step-panel {
  position: static;
  margin-bottom: 1rem;
}

.sequence-step-panel--replied {
  border-left: 3px solid #0f766e;
}

.sequence-editor-toolbar {
  z-index: 2;
}

.sequence-link-label {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.1rem 0.4rem;
  border-radius: 0.25rem;
  background: #fff;
  border: 1px solid #cbd5e1;
  white-space: nowrap;
}

.sequence-step-preview {
  position: relative;
  border: 1px solid var(--phoenix-border-color, #d8e2ef);
  border-radius: 0.5rem;
  background: var(--phoenix-body-highlight-bg, #f5f7fa);
  padding: 0.75rem 1rem;
  min-height: 5.5rem;
}

.sequence-step-preview-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: rgba(255, 255, 255, 0.7);
  border-radius: inherit;
  font-size: 0.8rem;
  color: var(--phoenix-secondary-color, #525b75);
}