/* ==========================================================================
   VoltMind AI - Animated N8N-Style Flowcharts
   Pure CSS animations with scroll-triggered reveals
   ========================================================================== */

/* ==========================================================================
   FLOWCHART CONTAINER
   ========================================================================== */
.flowchart {
  position: relative;
  padding: 48px 24px;
  overflow: hidden;
}

.flowchart__title {
  text-align: center;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 40px;
}

.flowchart__canvas {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
  min-height: 300px;
  padding-bottom: 40px;
}

/* ==========================================================================
   NODES — N8N-style rounded cards with icons
   ========================================================================== */
.fc-node {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: scale(0.6) translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  z-index: 2;
  cursor: default;
}

.fc-node.revealed {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.fc-node__box {
  width: 72px;
  height: 72px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
  position: relative;
}

.fc-node:hover .fc-node__box {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12), 0 2px 6px rgba(0, 0, 0, 0.08);
}

.fc-node__box svg {
  width: 32px;
  height: 32px;
}

.fc-node__label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-text-primary);
  text-align: center;
  white-space: nowrap;
}

.fc-node__sublabel {
  font-size: 0.6875rem;
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 100px;
  line-height: 1.3;
}

/* Node color variants */
.fc-node--trigger .fc-node__box {
  background-color: #DBEAFE;
  border: 2px solid #2563EB;
  color: #2563EB;
}

.fc-node--ai .fc-node__box {
  background-color: #0F172A;
  border: 2px solid #0F172A;
  color: #FFFFFF;
}

.fc-node--action .fc-node__box {
  background-color: #D1FAE5;
  border: 2px solid #059669;
  color: #059669;
}

.fc-node--decision .fc-node__box {
  background-color: #FEF3C7;
  border: 2px solid #D97706;
  color: #D97706;
  border-radius: 16px;
  transform: rotate(0deg);
}

.fc-node--output .fc-node__box {
  background-color: #EDE9FE;
  border: 2px solid #7C3AED;
  color: #7C3AED;
}

.fc-node--data .fc-node__box {
  background-color: #FCE7F3;
  border: 2px solid #DB2777;
  color: #DB2777;
}

/* Active pulse on trigger node */
.fc-node--trigger .fc-node__box::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 20px;
  border: 2px solid #2563EB;
  opacity: 0;
  animation: node-pulse 2.5s ease-in-out infinite;
  animation-delay: 1.5s;
}

@keyframes node-pulse {
  0%, 100% { opacity: 0; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(1.12); }
}

/* ==========================================================================
   CONNECTION LINES — SVG paths with animated flow
   ========================================================================== */
.flowchart__connections {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

.flowchart__connections svg {
  width: 100%;
  height: 100%;
}

.fc-line {
  fill: none;
  stroke: #CBD5E1;
  stroke-width: 2;
  stroke-dasharray: 1000;
  stroke-dashoffset: 1000;
  transition: stroke-dashoffset 1.2s ease;
}

.fc-line.revealed {
  stroke-dashoffset: 0;
}

.fc-line--active {
  stroke: #2563EB;
  stroke-width: 2.5;
}

/* Animated data particles flowing along paths */
.fc-particle {
  fill: #2563EB;
  opacity: 0;
  r: 4;
}

.fc-particle.revealed {
  opacity: 1;
}

.fc-particle--green { fill: #059669; }
.fc-particle--purple { fill: #7C3AED; }
.fc-particle--orange { fill: #D97706; }

/* Arrow markers */
.fc-arrow {
  fill: #CBD5E1;
}

.fc-arrow--active {
  fill: #2563EB;
}

/* ==========================================================================
   FLOWCHART TOOLTIP / DETAIL POPUP
   ========================================================================== */
.fc-node__detail {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.9);
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 12px 16px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  white-space: nowrap;
  z-index: 10;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.fc-node:hover .fc-node__detail {
  opacity: 1;
  transform: translateX(-50%) scale(1);
  pointer-events: auto;
}

/* ==========================================================================
   STAGGERED REVEAL DELAYS
   ========================================================================== */
.fc-node[data-delay="1"] { transition-delay: 0.1s; }
.fc-node[data-delay="2"] { transition-delay: 0.3s; }
.fc-node[data-delay="3"] { transition-delay: 0.5s; }
.fc-node[data-delay="4"] { transition-delay: 0.7s; }
.fc-node[data-delay="5"] { transition-delay: 0.9s; }
.fc-node[data-delay="6"] { transition-delay: 1.1s; }
.fc-node[data-delay="7"] { transition-delay: 1.3s; }

.fc-line[data-delay="1"] { transition-delay: 0.2s; }
.fc-line[data-delay="2"] { transition-delay: 0.4s; }
.fc-line[data-delay="3"] { transition-delay: 0.6s; }
.fc-line[data-delay="4"] { transition-delay: 0.8s; }
.fc-line[data-delay="5"] { transition-delay: 1.0s; }
.fc-line[data-delay="6"] { transition-delay: 1.2s; }

/* ==========================================================================
   FLOWCHART LEGEND
   ========================================================================== */
.flowchart__legend {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 32px;
  flex-wrap: wrap;
}

.flowchart__legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--color-text-secondary);
}

.flowchart__legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 4px;
}

.flowchart__legend-dot--trigger { background: #DBEAFE; border: 1.5px solid #2563EB; }
.flowchart__legend-dot--ai { background: #0F172A; border: 1.5px solid #0F172A; }
.flowchart__legend-dot--decision { background: #FEF3C7; border: 1.5px solid #D97706; }
.flowchart__legend-dot--action { background: #D1FAE5; border: 1.5px solid #059669; }
.flowchart__legend-dot--output { background: #EDE9FE; border: 1.5px solid #7C3AED; }

/* ==========================================================================
   WORKFLOW SELECTOR TABS
   ========================================================================== */
.flowchart__tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.flowchart__tab {
  padding: 8px 20px;
  border: 1.5px solid var(--color-border);
  border-radius: 24px;
  background: white;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.flowchart__tab:hover {
  border-color: #2563EB;
  color: #2563EB;
}

.flowchart__tab.active {
  background: #2563EB;
  border-color: #2563EB;
  color: white;
}

/* ==========================================================================
   MOBILE RESPONSIVE
   ========================================================================== */
@media (max-width: 768px) {
  .flowchart__canvas {
    min-height: 600px;
    transform: scale(0.7);
    transform-origin: top center;
    margin-bottom: -120px;
  }

  .flowchart__tabs {
    gap: 6px;
  }

  .flowchart__tab {
    padding: 6px 14px;
    font-size: 0.8125rem;
  }

  .flowchart__legend {
    gap: 12px;
  }

  .fc-node__detail {
    display: none;
  }
}

@media (max-width: 480px) {
  .flowchart__canvas {
    transform: scale(0.55);
    margin-bottom: -180px;
  }
}