.mind-map-container {
  min-height: 100vh;
  padding: 6rem 0 2rem 0;
  background-color: var(--bg-color);
}

.node {
  border-radius: 15px;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  position: relative;
  z-index: 1;
}

.node:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.main-node {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.past-node {
  background: linear-gradient(135deg, var(--primary-color), #5B86E5);
  color: white;
}

.future-node {
  background: linear-gradient(135deg, var(--secondary-color), #4A00E0);
  color: white;
}

.sub-node-inst {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
}

.sub-node-extra {
  background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
  color: white;
}

.item-node {
  background: var(--card-bg);
  color: var(--text-color);
  border-radius: 12px;
  border-left: 5px solid var(--primary-color);
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.item-node:hover {
  transform: scale(1.03);
}

.connector {
  position: absolute;
  background-color: var(--primary-color);
  opacity: 0.3;
  z-index: 0;
}

.vertical-connector {
  width: 4px;
  left: 50%;
  transform: translateX(-50%);
}

.horizontal-connector {
  height: 4px;
  top: 50%;
  transform: translateY(-50%);
}

.bubble {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
  z-index: 0;
}

.shape {
  position: absolute;
  z-index: 0;
  opacity: 0.1;
}

@media print {
  .mind-map-container {
      width: 100%;
      height: auto;
  }
  .page-break {
      display: none;
  }
}

@keyframes float {
  0% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-10px) rotate(5deg); }
  100% { transform: translateY(5px) rotate(-5deg); }
}