/* Project Tree Container */
.project-tree-container {
  position: relative;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem 0;
}

/* Tree Header - PROJECTS heading */
.tree-header {
  text-align: center;
  margin-bottom: 3rem;
}

.projects-heading {
  font-family: 'Exo 2', sans-serif;
  font-size: 2.5rem;
  font-weight: 300;
  letter-spacing: 2px;
  margin: 0;
  color: white;
}

/* Category Row at Top */
.category-row {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 3rem;
  margin-top: 3rem;
  margin-bottom: 4rem;
  flex-wrap: wrap;
  position: relative;
  z-index: 10;
}

.category-label {
  font-family: 'Exo 2', sans-serif;
  font-size: 0.95rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  padding: 0.5rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  background: rgba(20, 40, 80, 0.2);
  cursor: default;
  white-space: nowrap;
}

/* ML Category Group with subcategories */
.category-group {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.8rem;
}

.parent-category-label {
  font-family: 'Exo 2', sans-serif;
  font-size: 0.95rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.85);
  padding: 0.5rem 1rem;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 4px;
  background: rgba(20, 40, 80, 0.2);
  cursor: default;
  white-space: nowrap;
}

.subcategory-row {
  display: flex;
  gap: 1.5rem;
}

.subcategory {
  font-size: 0.85rem;
  padding: 0.4rem 0.8rem;
  background: rgba(20, 40, 80, 0.15);
  border-color: rgba(255, 255, 255, 0.15);
}

/* Shared Projects Row Below - Flexbox layout */
.projects-row {
  position: relative;
  z-index: 10;
  margin-top: 2rem;
  max-width: 1400px;
  margin-left: auto;
  margin-right: auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  padding: 2rem 1rem;
}

/* Project Cards - Flexbox positioned */
.project-card-tree {
  background: rgba(20, 40, 80, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  width: 140px;
  position: relative;
}

.project-card-tree:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  border-color: rgba(255, 255, 255, 0.2);
}

/* Expanded State - Only 40% larger */
.project-card-tree.expanded {
  width: 196px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.5);
  border-color: rgba(255, 255, 255, 0.3);
  z-index: 10;
}

/* Thumbnail */
.project-thumbnail-tree {
  width: 100%;
  height: 60px;
  background-size: cover;
  background-position: center;
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  background-color: rgba(20, 30, 60, 0.3);
}

.project-card-tree.expanded .project-thumbnail-tree {
  height: 80px;
}

.project-status {
  position: absolute;
  top: 4px;
  right: 4px;
  padding: 2px 5px;
  border-radius: 6px;
  font-size: 0.55rem;
  color: white;
  background-color: rgba(0, 0, 0, 0.5);
}

.status-ongoing {
  background-color: rgba(25, 118, 210, 0.8);
}

.status-completed {
  background-color: rgba(46, 125, 50, 0.8);
}

.status-planned {
  background-color: rgba(237, 108, 2, 0.8);
}

/* Content */
.project-content-tree {
  padding: 0.5rem;
}

.project-card-tree.expanded .project-content-tree {
  padding: 0.7rem;
}

.project-title-tree {
  font-family: 'Exo 2', sans-serif;
  font-size: 0.75rem;
  font-weight: 300;
  margin: 0;
  color: white;
  line-height: 1.2;
}

.project-card-tree.expanded .project-title-tree {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

/* Description - Only visible when expanded */
.project-description-tree {
  font-size: 0.75rem;
  line-height: 1.5;
  color: #ccc;
  margin: 0.5rem 0;
  opacity: 0;
  animation: fadeIn 0.3s ease 0.2s forwards;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Tags - Only visible when expanded */
.project-tags-tree {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin: 0.5rem 0;
  opacity: 0;
  animation: fadeIn 0.3s ease 0.25s forwards;
}

.project-tags-tree .tag {
  font-size: 0.6rem;
  padding: 2px 6px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
}


/* SVG Connection Lines */
.connection-lines {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 5;
  overflow: visible;
}

.connection-lines line {
  stroke: rgba(255, 255, 255, 0.2);
  stroke-width: 1.5;
  transition: all 0.3s ease;
}

.connection-lines line.heading-line {
  stroke: rgba(255, 255, 255, 0.3);
  stroke-width: 2;
}

.connection-lines line.subcategory-line {
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 2;
}

.connection-lines line.project-line {
  stroke: rgba(255, 255, 255, 0.25);
  stroke-width: 1.5;
}

/* Ensure elements are properly layered */
.tree-header {
  position: relative;
  z-index: 10;
}

.category-row {
  position: relative;
  z-index: 10;
}

.projects-row {
  position: relative;
  z-index: 10;
}

/* Mobile Styles */
@media (max-width: 1024px) {
  .category-row {
    gap: 2rem;
  }

  .subcategory-row {
    gap: 1rem;
  }
}

@media (max-width: 768px) {
  /* Revert to simple grid on mobile - no tree lines */
  .project-tree-container {
    padding: 1rem 0;
  }

  .tree-header {
    margin-bottom: 2rem;
  }

  .projects-heading {
    font-size: 2rem;
  }

  /* Hide connection lines on mobile */
  .connection-lines {
    display: none;
  }

  /* Hide category row on mobile */
  .category-row {
    display: none;
  }

  /* Simple grid for projects */
  .projects-row {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 0;
    height: auto;
  }

  .project-card-tree {
    position: relative !important;
    left: auto !important;
    top: auto !important;
    width: 100%;
  }

  .project-card-tree.expanded {
    width: 100%;
  }

  .project-thumbnail-tree {
    height: 160px;
  }

  .project-card-tree.expanded .project-thumbnail-tree {
    height: 180px;
  }
}

@media (max-width: 480px) {
  .projects-heading {
    font-size: 1.5rem;
    letter-spacing: 1px;
  }

  .project-title-tree {
    font-size: 1rem;
  }

  .project-card-tree.expanded .project-title-tree {
    font-size: 1.1rem;
  }

  .project-thumbnail-tree {
    height: 120px;
  }

  .project-card-tree.expanded .project-thumbnail-tree {
    height: 140px;
  }
}