/* ============================================
   ADVANCED LAYOUT STYLES - LucidChart-style
   ============================================ */

/* Branching Layout - Left/Right */
.diagram--branching {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
  padding: var(--space-xl);
}

.branch-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  width: 100%;
  position: relative;
}

.branch-row--split {
  gap: var(--space-2xl);
}

.branch-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  flex: 1;
  max-width: 350px;
}

.branch-center {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  align-items: center;
  z-index: var(--z-base);
}

/* Connector Lines */
.connector-line {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
}

.connector-line::before {
  content: "";
  position: absolute;
  background-color: var(--color-border-medium);
}

/* Vertical connector */
.connector-line--vertical::before {
  width: 2px;
  height: 100%;
  left: 50%;
  transform: translateX(-1px);
}

/* Horizontal connector */
.connector-line--horizontal::before {
  height: 2px;
  width: 100%;
  top: 50%;
  transform: translateY(-1px);
}

/* T-shaped connector (splits into branches) */
.connector-t {
  position: relative;
  height: 60px;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.connector-t::before {
  content: "";
  position: absolute;
  width: 2px;
  height: 30px;
  background-color: var(--color-border-medium);
  top: 0;
  left: 50%;
  transform: translateX(-1px);
}

.connector-t::after {
  content: "";
  position: absolute;
  height: 2px;
  width: 100%;
  background-color: var(--color-border-medium);
  top: 30px;
  left: 0;
}

/* Arrow indicators */
.arrow {
  position: relative;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xl);
  line-height: 1;
}

.arrow--down::before {
  content: "↓";
}

.arrow--right::before {
  content: "→";
}

.arrow--left::before {
  content: "←";
}

/* Grid Layout (LucidChart-style) */
.diagram--grid-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl) var(--space-2xl);
  padding: var(--space-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.grid-cell {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  position: relative;
}

.grid-cell--span-2 {
  grid-column: span 2;
}

.grid-cell--span-3 {
  grid-column: span 3;
}

.grid-cell--center {
  justify-self: center;
}

/* Compact Node Variant for Grid Layouts */
.node--compact {
  padding: var(--space-sm) var(--space-md);
  min-width: 200px;
}

.node--compact .node__title {
  font-size: var(--font-size-md);
}

.node--compact .node__content {
  font-size: var(--font-size-xs);
}

/* Swimlane Layout */
.diagram--swimlane {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: var(--space-md);
  padding: var(--space-xl);
}

.swimlane-label {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md);
  background: var(--color-bg-secondary);
  border-right: 3px solid var(--color-border-medium);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-secondary);
  text-align: center;
}

.swimlane-content {
  display: flex;
  flex-direction: row;
  gap: var(--space-md);
  align-items: center;
  padding: var(--space-md);
  min-height: 150px;
}

/* Decision Diamond */
.node--decision {
  position: relative;
  background: var(--color-warning);
  color: var(--color-white);
  width: 120px;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-sm);
  padding: var(--space-sm);
  transform: rotate(45deg);
  border: none;
  border-radius: var(--border-radius-md);
}

.node--decision .decision-text {
  transform: rotate(-45deg);
}

/* Process Flow Indicators */
.flow-label {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  padding: 0.25rem 0.5rem;
  background: var(--color-bg-tertiary);
  border-radius: var(--border-radius-sm);
}

/* Responsive adjustments */
@media (max-width: 900px) {
  .diagram--grid-flow {
    grid-template-columns: 1fr;
  }

  .grid-cell--span-2,
  .grid-cell--span-3 {
    grid-column: span 1;
  }

  .branch-row {
    flex-direction: column;
  }

  .connector-t::after {
    display: none;
  }
}