/**
 * Skill Tree Styles
 * Phi spiral skill tree visualization
 */

@import url('./design-tokens.css');

/* ============================================
   SKILL TREE CONTAINER
   ============================================ */

.skill-tree-container {
  width: 100%;
  height: 400px;
  position: relative;
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.skill-tree-svg {
  width: 100%;
  height: 100%;
}

/* ============================================
   SKILL LINES
   ============================================ */

.skill-lines {
  pointer-events: none;
}

.skill-line {
  stroke-linecap: round;
  transition: stroke-opacity var(--duration-normal);
}

@keyframes skill-line-draw {
  to {
    stroke-dashoffset: 0;
  }
}

/* ============================================
   SKILL NODES
   ============================================ */

.skill-node {
  cursor: pointer;
  transition: transform var(--duration-fast) ease;
}

.skill-node:hover {
  filter: brightness(1.2);
}

.skill-node.primary circle:first-child {
  animation: skill-pulse 2s ease-in-out infinite;
}

@keyframes skill-pulse {
  0%,
  100% {
    fill-opacity: 0.2;
  }
  50% {
    fill-opacity: 0.4;
  }
}

.skill-node.teaches {
  filter: drop-shadow(0 0 4px rgba(251, 191, 36, 0.5));
}

.skill-label {
  font-family: 'JetBrains Mono', monospace;
  pointer-events: none;
  transition: opacity var(--duration-fast);
}

.skill-node:hover .skill-label {
  fill: #fff;
}

/* ============================================
   SKILL TOOLTIP
   ============================================ */

.skill-tooltip {
  position: fixed;
  z-index: var(--z-popover);
  padding: var(--space-md);
  background: rgba(10, 10, 15, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  pointer-events: none;
  max-width: 280px;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  animation: tooltipFadeIn var(--duration-fast) ease;
}

@keyframes tooltipFadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.skill-tooltip-header {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  margin-bottom: var(--space-xs);
}

.skill-tooltip-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  font-size: var(--text-base);
}

.skill-tooltip-name {
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  color: #fff;
}

.skill-tooltip-level {
  font-size: var(--text-xs);
  padding: var(--space-2xs) var(--space-xs);
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-xs);
  color: #888;
  margin-left: auto;
}

.skill-tooltip-desc {
  font-size: var(--text-sm);
  color: #888;
  line-height: 1.4;
  margin-bottom: var(--space-xs);
}

.skill-tooltip-category {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  color: #666;
}

.skill-tooltip-category-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.skill-tooltip-prereqs {
  margin-top: var(--space-xs);
  padding-top: var(--space-xs);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.skill-tooltip-prereqs-title {
  font-size: var(--text-xs);
  color: #666;
  margin-bottom: var(--space-2xs);
}

.skill-tooltip-prereqs-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2xs);
}

.skill-tooltip-prereq {
  padding: var(--space-2xs) var(--space-xs);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-xs);
  font-size: var(--text-xs);
  color: #888;
}

/* ============================================
   SKILL LEGEND
   ============================================ */

.skill-legend {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  padding: var(--space-md);
  background: rgba(0, 0, 0, 0.3);
  border-radius: var(--radius-md);
  margin-top: var(--space-md);
}

.skill-legend-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--text-xs);
  color: #888;
}

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

.skill-legend-dot.primary {
  background: #00ff88;
  box-shadow: 0 0 8px rgba(0, 255, 136, 0.5);
}

.skill-legend-dot.secondary {
  background: #666;
}

.skill-legend-dot.teaches {
  background: #fbbf24;
}

/* ============================================
   SKILL TREE HEADER
   ============================================ */

.skill-tree-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.skill-tree-title {
  font-size: var(--text-lg);
  font-weight: var(--font-semibold);
  color: #fff;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.skill-tree-title-icon {
  color: #00ff88;
}

.skill-tree-filters {
  display: flex;
  gap: var(--space-xs);
}

.skill-tree-filter {
  padding: var(--space-xs) var(--space-md);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  color: #888;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--duration-fast);
}

.skill-tree-filter:hover,
.skill-tree-filter.active {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.2);
}

/* ============================================
   EMPTY STATE
   ============================================ */

.skill-tree-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: #666;
  text-align: center;
  padding: var(--space-2xl);
}

.skill-tree-empty-icon {
  font-size: 3rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.skill-tree-empty-text {
  font-size: var(--text-sm);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
  .skill-tree-container {
    height: 300px;
  }

  .skill-legend {
    justify-content: center;
  }
}