/* Skill Tree Page Specific Styles */

.skill-tree-main {
  padding-top: 80px;
  min-height: 100vh;
}

/* Header */
.skill-tree-header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
  padding: var(--spacing-xl) 0;
}

.skill-tree-title {
  font-size: clamp(2rem, 6vw, 3.5rem);
  margin-bottom: var(--spacing-md);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.skill-tree-subtitle {
  font-size: var(--font-size-xl);
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.skill-tree-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--accent-primary)20, var(--accent-secondary)20);
  border: 1px solid var(--accent-primary);
  border-radius: var(--radius-lg);
  color: var(--accent-primary);
  font-weight: 600;
}

/* Skill Tree Container */
.skill-tree-container {
  position: relative;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
  min-height: 600px;
}

.tree-viewport {
  position: relative;
  width: 100%;
  height: 600px;
  overflow: auto;
  border-radius: var(--radius-lg);
  background: radial-gradient(circle at center, rgba(0, 255, 255, 0.05), transparent);
}

.tree-canvas {
  position: relative;
  width: 1200px;
  height: 800px;
  margin: 0 auto;
  transform-origin: center center;
  transition: transform 0.3s ease;
}

/* Tree Controls */
.tree-controls {
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  flex-wrap: wrap;
}

.tree-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  cursor: pointer;
  transition: var(--transition-base);
  font-weight: 500;
}

.tree-btn:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}

/* Tree Nodes */
.tree-node {
  position: absolute;
  background: var(--glass-bg);
  border: 2px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
  backdrop-filter: blur(10px);
  user-select: none;
  min-width: 120px;
  text-align: center;
}

.tree-node:hover {
  background: var(--glass-border);
  box-shadow: 0 0 20px rgba(0, 255, 255, 0.4);
  transform: scale(1.05);
  z-index: 10;
}

.tree-node.root {
  background: linear-gradient(135deg, var(--accent-primary)30, var(--accent-secondary)30);
  border-color: var(--accent-primary);
  font-weight: 700;
  font-size: var(--font-size-lg);
  min-width: 150px;
  padding: var(--spacing-lg);
}

.tree-node.expanded {
  background: linear-gradient(135deg, var(--accent-tertiary)20, var(--accent-primary)20);
  border-color: var(--accent-tertiary);
  box-shadow: 0 0 15px rgba(0, 255, 136, 0.3);
}

.tree-node.locked {
  opacity: 0.5;
  background: var(--bg-secondary);
  border-color: var(--text-muted);
  cursor: not-allowed;
}

.tree-node.completed {
  background: linear-gradient(135deg, #ffd700, #ffed4e);
  border-color: #ffd700;
  color: var(--bg-primary);
  box-shadow: 0 0 20px rgba(255, 215, 0, 0.4);
}

.node-icon {
  font-size: var(--font-size-xl);
  margin-bottom: var(--spacing-xs);
  display: block;
}

.node-title {
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-sm);
}

.node-level {
  font-size: var(--font-size-xs);
  color: var(--text-muted);
  background: var(--bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.node-status {
  position: absolute;
  top: -8px;
  right: -8px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent-tertiary);
  color: var(--bg-primary);
  font-size: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
}

/* Connection Lines */
.connection-line {
  position: absolute;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  height: 2px;
  transform-origin: left center;
  opacity: 0.6;
  transition: opacity 0.3s ease;
  z-index: 1;
}

.connection-line.active {
  opacity: 1;
  box-shadow: 0 0 10px var(--accent-primary);
  animation: pulse-line 2s ease-in-out infinite;
}

/* Detail Panel */
.detail-panel {
  position: fixed;
  top: 50%;
  right: 30px;
  transform: translateY(-50%);
  width: 400px;
  max-height: 80vh;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  backdrop-filter: blur(15px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transition: all 0.4s cubic-bezier(0.4, 0.0, 0.2, 1);
  overflow: hidden;
}

.detail-panel.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%) translateX(100px);
}

.panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--glass-border);
  background: linear-gradient(135deg, var(--accent-primary)10, var(--accent-secondary)10);
}

.panel-title {
  color: var(--accent-primary);
  margin: 0;
  font-size: var(--font-size-xl);
}

.panel-close {
  background: none;
  border: none;
  color: var(--text-secondary);
  font-size: var(--font-size-lg);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.panel-close:hover {
  background: var(--glass-border);
  color: var(--accent-primary);
}

.panel-content {
  padding: var(--spacing-lg);
  max-height: calc(80vh - 80px);
  overflow-y: auto;
}

.detail-section {
  margin-bottom: var(--spacing-lg);
}

.detail-section:last-child {
  margin-bottom: 0;
}

.detail-heading {
  color: var(--accent-secondary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.detail-text {
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: var(--spacing-sm);
}

.detail-list {
  list-style: none;
  padding-left: 0;
}

.detail-list li {
  position: relative;
  padding-left: var(--spacing-lg);
  margin-bottom: var(--spacing-xs);
  color: var(--text-secondary);
}

.detail-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--accent-primary);
  font-weight: bold;
}

.code-example {
  background: var(--bg-secondary);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  margin: var(--spacing-sm) 0;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--accent-tertiary);
  overflow-x: auto;
}

.resource-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.resource-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  color: var(--accent-primary);
  text-decoration: none;
  transition: var(--transition-base);
  font-size: var(--font-size-sm);
}

.resource-link:hover {
  background: var(--accent-primary);
  color: var(--bg-primary);
  box-shadow: 0 0 10px var(--accent-primary);
}

/* Learning Paths */
.learning-paths-section {
  margin-top: var(--spacing-xxl);
}

.paths-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.path-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  text-align: center;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}

.path-card::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.1), transparent);
  transform: rotate(45deg);
  transition: var(--transition-slow);
  opacity: 0;
}

.path-card:hover::before {
  animation: shimmer 1.5s ease-in-out;
}

.path-card:hover {
  background: var(--glass-border);
  box-shadow: var(--shadow-glow);
  transform: translateY(-5px);
}

.path-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--accent-primary);
}

.path-title {
  color: var(--text-primary);
  margin-bottom: var(--spacing-md);
  font-size: var(--font-size-xl);
}

.path-description {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.path-progress {
  margin-bottom: var(--spacing-lg);
}

.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--glass-border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--spacing-xs);
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  border-radius: 4px;
  transition: width 0.3s ease;
  box-shadow: 0 0 10px var(--accent-primary);
}

.progress-text {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

.path-btn {
  padding: var(--spacing-sm) var(--spacing-lg);
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  color: var(--bg-primary);
  border: none;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
}

.path-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 255, 255, 0.4);
}

/* Animations */
@keyframes pulse-line {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; transform: scaleY(1.2); }
}

@keyframes shimmer {
  0% { transform: translateX(-100%) translateY(-100%) rotate(45deg); opacity: 0; }
  50% { opacity: 1; }
  100% { transform: translateX(100%) translateY(100%) rotate(45deg); opacity: 0; }
}

@keyframes nodeUnlock {
  0% { transform: scale(0.8); opacity: 0; }
  50% { transform: scale(1.1); }
  100% { transform: scale(1); opacity: 1; }
}

@keyframes levelUp {
  0% { transform: scale(1); }
  25% { transform: scale(1.2) rotate(5deg); }
  50% { transform: scale(1.1) rotate(-5deg); }
  75% { transform: scale(1.15) rotate(3deg); }
  100% { transform: scale(1) rotate(0deg); }
}

/* Responsive Design */
@media (max-width: 1024px) {
  .tree-canvas {
    width: 100%;
    height: 600px;
  }
  
  .detail-panel {
    position: fixed;
    top: auto;
    bottom: 0;
    right: 0;
    left: 0;
    width: 100%;
    max-height: 50vh;
    transform: translateY(100%);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  }
  
  .detail-panel.hidden {
    transform: translateY(100%);
  }
  
  .detail-panel:not(.hidden) {
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .tree-viewport {
    height: 500px;
  }
  
  .tree-canvas {
    height: 500px;
  }
  
  .tree-node {
    min-width: 100px;
    padding: var(--spacing-sm);
    font-size: var(--font-size-sm);
  }
  
  .tree-node.root {
    min-width: 120px;
    padding: var(--spacing-md);
  }
  
  .paths-grid {
    grid-template-columns: 1fr;
  }
  
  .tree-controls {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .skill-tree-container {
    padding: var(--spacing-md);
  }
  
  .tree-viewport {
    height: 400px;
  }
  
  .tree-canvas {
    height: 400px;
  }
  
  .tree-node {
    min-width: 80px;
    padding: var(--spacing-xs);
  }
  
  .node-icon {
    font-size: var(--font-size-lg);
  }
  
  .detail-panel {
    max-height: 60vh;
  }
}