/* ═══════════════════════════════════════════════════════════
   NETWORK GRAPH VISUALIZATION - Phase 3
   Beautiful visual representation of Torah connections
   ═══════════════════════════════════════════════════════════ */

/* ─────────────────────────────────────────────
   GRAPH CONTAINER
   ───────────────────────────────────────────── */
.network-graph {
  position: relative;
  width: 100%;
  height: 600px;
  background: radial-gradient(circle at center, rgba(212, 175, 55, 0.05), transparent);
  border: 2px solid var(--border-gold);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin: 2rem 0;
}

.graph-links {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.graph-nodes {
  position: relative;
  width: 100%;
  height: 100%;
}

/* ─────────────────────────────────────────────
   GRAPH NODES
   ───────────────────────────────────────────── */
.graph-node {
  position: absolute;
  transform: translate(-50%, -50%);
  cursor: pointer;
  transition: all 0.3s ease;
  z-index: 10;
}

.graph-node-center {
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, var(--warm-gold), rgba(212, 175, 55, 0.6));
  border: 4px solid var(--warm-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 40px rgba(212, 175, 55, 0.6);
  animation: centerPulse 3s ease-in-out infinite;
}

@keyframes centerPulse {
  0%, 100% {
    transform: translate(-50%, -50%) scale(1);
    box-shadow: 0 0 40px rgba(212, 175, 55, 0.6);
  }
  50% {
    transform: translate(-50%, -50%) scale(1.05);
    box-shadow: 0 0 60px rgba(212, 175, 55, 0.8);
  }
}

.graph-node-gemara {
  width: 80px;
  height: 80px;
  background: rgba(212, 175, 55, 0.2);
  border: 3px solid var(--warm-gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.graph-node-midrash {
  width: 70px;
  height: 70px;
  background: rgba(91, 75, 138, 0.2);
  border: 3px solid #5b4b8a;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.graph-node-other {
  width: 60px;
  height: 60px;
  background: rgba(43, 76, 126, 0.2);
  border: 2px solid #2b4c7e;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Node hover effects */
.graph-node:not(.graph-node-center):hover {
  transform: translate(-50%, -50%) scale(1.2);
  z-index: 20;
}

.graph-node-gemara:hover {
  background: rgba(212, 175, 55, 0.4);
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.5);
}

.graph-node-midrash:hover {
  background: rgba(91, 75, 138, 0.4);
  box-shadow: 0 0 30px rgba(91, 75, 138, 0.5);
}

.graph-node-other:hover {
  background: rgba(43, 76, 126, 0.4);
  box-shadow: 0 0 30px rgba(43, 76, 126, 0.5);
}

/* ─────────────────────────────────────────────
   NODE LABELS
   ───────────────────────────────────────────── */
.node-label {
  font-size: 0.75rem;
  color: var(--text-primary);
  text-align: center;
  font-weight: 600;
  line-height: 1.2;
  padding: 0.25rem;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
}

.graph-node-center .node-label {
  font-size: 1rem;
  font-family: var(--font-serif);
  color: var(--sacred-black);
}

/* ─────────────────────────────────────────────
   LEGEND
   ───────────────────────────────────────────── */
.graph-legend {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
  backdrop-filter: blur(10px);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.legend-dot-center {
  background: var(--warm-gold);
  box-shadow: 0 0 10px rgba(212, 175, 55, 0.6);
}

.legend-dot-gemara {
  background: rgba(212, 175, 55, 0.4);
  border: 2px solid var(--warm-gold);
}

.legend-dot-midrash {
  background: rgba(91, 75, 138, 0.4);
  border: 2px solid #5b4b8a;
}

.legend-dot-other {
  background: rgba(43, 76, 126, 0.4);
  border: 2px solid #2b4c7e;
}

/* ─────────────────────────────────────────────
   GRAPH HINT
   ───────────────────────────────────────────── */
.graph-hint {
  position: absolute;
  top: 20px;
  right: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-gold);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  font-style: italic;
  backdrop-filter: blur(10px);
}

/* ─────────────────────────────────────────────
   LOADING & ERROR STATES
   ───────────────────────────────────────────── */
.graph-loading,
.graph-empty,
.graph-error {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 400px;
  text-align: center;
}

.graph-loading p,
.graph-empty p,
.graph-error p {
  color: var(--text-secondary);
  font-size: 1.1rem;
  margin-top: 1rem;
}

/* ─────────────────────────────────────────────
   RESPONSIVE
   ───────────────────────────────────────────── */
@media (max-width: 768px) {
  .network-graph {
    height: 400px;
  }

  .graph-node-center {
    width: 80px;
    height: 80px;
  }

  .graph-node-gemara {
    width: 60px;
    height: 60px;
  }

  .graph-node-midrash {
    width: 50px;
    height: 50px;
  }

  .graph-node-other {
    width: 40px;
    height: 40px;
  }

  .node-label {
    font-size: 0.6rem;
  }

  .graph-node-center .node-label {
    font-size: 0.8rem;
  }

  .graph-legend {
    flex-direction: column;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    font-size: 0.75rem;
  }

  .graph-hint {
    font-size: 0.75rem;
    padding: 0.5rem 0.75rem;
  }
}

/* ─────────────────────────────────────────────
   ANIMATIONS
   ───────────────────────────────────────────── */
@keyframes graphFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.network-graph {
  animation: graphFadeIn 0.5s ease;
}