/* ==========================================================================
   assets/css/pages/skill-tree.css
   Interactive Visual Skill & Knowledge Tree Page Styles
   ========================================================================== */

.skill-tree-page-wrapper {
  max-width: 1440px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem 1rem;
}

/* Hero & Discipline Filter Bar */
.skill-tree-hero {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl, 1.25rem);
  padding: 1.75rem 2rem;
  box-shadow: var(--shadow-md);
}

@media (min-width: 900px) {
  .skill-tree-hero {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.skill-tree-hero-content {
  max-width: 600px;
}

.skill-tree-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  background-color: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
  font-size: 0.8rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.skill-tree-hero-title {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-text-main);
  font-family: var(--font-display);
  line-height: 1.2;
  margin: 0 0 0.5rem 0;
}

.skill-tree-hero-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* Discipline Navigation Pills */
.discipline-nav-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  background-color: var(--color-bg-base);
  padding: 0.4rem;
  border-radius: var(--radius-xl, 14px);
  border: 1px solid var(--color-border);
}

.discipline-btn {
  border: none;
  background: transparent;
  padding: 0.6rem 1.15rem;
  border-radius: var(--radius-lg, 10px);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-text-muted);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  transition: all 0.2s ease;
}

.discipline-btn:hover {
  color: var(--color-text-main);
  background-color: color-mix(in srgb, var(--color-text-main) 5%, transparent);
}

.discipline-btn.active {
  background-color: var(--color-primary);
  color: #ffffff !important;
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

/* Main Layout & Viewport */
.skill-tree-main-layout {
  position: relative;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl, 1.25rem);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  height: 680px;
  display: flex;
  flex-direction: column;
}

/* Toolbar & Bloom's Legend */
.skill-tree-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  background-color: var(--color-bg-base);
  border-bottom: 1px solid var(--color-border);
  z-index: 10;
}

.blooms-legend-bar {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.blooms-legend-title {
  font-size: 0.8rem;
  font-weight: 800;
  color: var(--color-text-main);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-right: 0.25rem;
}

.bloom-pill {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.6rem;
  border-radius: 9999px;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background-color: var(--color-bg-surface);
  border: 1px solid var(--color-border);
}

.bloom-pill.tier-1 { color: #cd7f32; border-color: rgba(205, 127, 50, 0.4); }
.bloom-pill.tier-2 { color: #94a3b8; border-color: rgba(148, 163, 184, 0.4); }
.bloom-pill.tier-3 { color: #f59e0b; border-color: rgba(245, 158, 11, 0.4); }
.bloom-pill.tier-4 { color: #06b6d4; border-color: rgba(6, 182, 212, 0.4); }

.canvas-zoom-controls {
  display: flex;
  gap: 0.35rem;
}

.zoom-btn {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-md, 6px);
  border: 1px solid var(--color-border);
  background-color: var(--color-bg-surface);
  color: var(--color-text-main);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.82rem;
  transition: all 0.2s;
}

.zoom-btn:hover {
  background-color: var(--color-bg-base);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* SVG Graph Viewport */
.skill-tree-viewport {
  flex-grow: 1;
  position: relative;
  overflow: hidden;
  cursor: grab;
  user-select: none;
  background: radial-gradient(circle at 50% 50%, color-mix(in srgb, var(--color-primary) 3%, transparent) 0%, transparent 80%),
              repeating-linear-gradient(0deg, var(--color-border) 0, var(--color-border) 1px, transparent 1px, transparent 40px),
              repeating-linear-gradient(90deg, var(--color-border) 0, var(--color-border) 1px, transparent 1px, transparent 40px);
  background-size: auto, 40px 40px, 40px 40px;
}

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

/* SVG Graph Nodes & Connections */
.skill-connection-line {
  fill: none;
  stroke: var(--color-border);
  stroke-width: 3;
  stroke-linecap: round;
  transition: stroke 0.3s, stroke-width 0.3s;
}

.skill-node-group {
  cursor: pointer;
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.skill-node-group:hover,
.skill-node-group:focus-visible {
  outline: none;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.15));
}

.skill-node-group:hover .skill-node-card {
  fill: var(--color-bg-elevated, var(--color-bg-surface));
}

.skill-node-card {
  fill: var(--color-bg-surface);
  transition: fill 0.2s;
}

.skill-node-border {
  fill: none;
  stroke-width: 2.5;
  transition: stroke-width 0.2s;
}

.skill-node-group.selected .skill-node-border {
  stroke-width: 4;
  filter: drop-shadow(0 0 8px var(--color-primary));
}

.skill-node-title {
  fill: var(--color-text-main);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 800;
  text-anchor: middle;
}

.skill-node-code {
  fill: var(--color-text-muted);
  font-family: monospace;
  font-size: 11px;
  font-weight: 700;
  text-anchor: middle;
}

.skill-node-tier-label {
  font-family: var(--font-body);
  font-size: 10px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  text-anchor: middle;
}

/* Node Details Slide-Over Drawer */
.node-detail-drawer {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  max-width: 380px;
  background-color: var(--color-bg-surface);
  border-left: 1px solid var(--color-border);
  box-shadow: -10px 0 25px rgba(0, 0, 0, 0.15);
  z-index: 20;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  animation: slideInDrawer 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slideInDrawer {
  from { transform: translateX(100%); }
  to { transform: translateX(0); }
}

.drawer-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.drawer-discipline-tag {
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
}

.drawer-close-btn {
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.drawer-close-btn:hover {
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
}

.drawer-body {
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  flex-grow: 1;
}

.drawer-title-row {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.drawer-node-icon {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg, 10px);
  background-color: color-mix(in srgb, var(--color-primary) 12%, transparent);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.35rem;
  flex-shrink: 0;
}

.drawer-node-title {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--color-text-main);
  margin: 0 0 0.2rem 0;
  line-height: 1.3;
}

.drawer-code-badge {
  font-size: 0.75rem;
  font-family: monospace;
  font-weight: 700;
  color: var(--color-text-muted);
  background-color: var(--color-bg-base);
  padding: 0.15rem 0.45rem;
  border-radius: 4px;
  border: 1px solid var(--color-border);
}

.drawer-bloom-card {
  padding: 1rem;
  background-color: var(--color-bg-base);
  border-radius: var(--radius-lg, 10px);
  border: 1px solid var(--color-border);
}

.drawer-bloom-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.82rem;
  margin-bottom: 0.5rem;
}

.drawer-bloom-label {
  color: var(--color-text-muted);
}

.drawer-bloom-value {
  font-weight: 800;
}

.drawer-bloom-progress-track {
  width: 100%;
  height: 6px;
  background-color: var(--color-border);
  border-radius: 9999px;
  overflow: hidden;
}

.drawer-bloom-progress-fill {
  height: 100%;
  border-radius: 9999px;
  transition: width 0.3s;
}

.drawer-section-title {
  font-size: 0.82rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0 0 0.5rem 0;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.drawer-desc {
  font-size: 0.88rem;
  color: var(--color-text-main);
  line-height: 1.5;
  margin: 0;
}

.prereq-chips-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.prereq-chip {
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.prereq-chip.unlocked {
  background-color: rgba(16, 185, 129, 0.1);
  color: #10b981;
  border: 1px solid rgba(16, 185, 129, 0.25);
}

.prereq-chip.root {
  background-color: color-mix(in srgb, var(--color-primary) 10%, transparent);
  color: var(--color-primary);
  border: 1px solid color-mix(in srgb, var(--color-primary) 25%, transparent);
}

.drawer-actions {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-top: auto;
}

.drawer-btn {
  width: 100%;
  padding: 0.7rem;
  border-radius: var(--radius-md, 8px);
  font-size: 0.88rem;
  font-weight: 800;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  border: none;
  transition: all 0.2s;
}

.drawer-btn.primary {
  background-color: var(--color-primary);
  color: #ffffff;
}

.drawer-btn.primary:hover {
  filter: brightness(1.1);
  transform: translateY(-1px);
}

.drawer-btn.secondary {
  background-color: var(--color-bg-base);
  color: var(--color-text-main);
  border: 1px solid var(--color-border);
}

.drawer-btn.secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* Multi-theme support for Skill Tree */
[data-theme="high-contrast"] .skill-tree-hero,
.high-contrast .skill-tree-hero,
[data-theme="high-contrast"] .skill-tree-main-layout,
.high-contrast .skill-tree-main-layout,
[data-theme="high-contrast"] .node-detail-drawer,
.high-contrast .node-detail-drawer,
[data-theme="high-contrast"] .skill-node-card,
.high-contrast .skill-node-card,
[data-theme="high-contrast"] .drawer-btn.secondary,
.high-contrast .drawer-btn.secondary {
  background-color: #000000 !important;
  color: #ffffff !important;
  border: 2px solid #ffffff !important;
  box-shadow: none !important;
}

[data-theme="high-contrast"] .skill-node-title,
.high-contrast .skill-node-title,
[data-theme="high-contrast"] .skill-tree-hero-title,
.high-contrast .skill-tree-hero-title,
[data-theme="high-contrast"] .drawer-node-title,
.high-contrast .drawer-node-title {
  fill: #ffffff !important;
  color: #ffffff !important;
}

[data-theme="high-contrast"] .skill-node-tier-label,
.high-contrast .skill-node-tier-label,
[data-theme="high-contrast"] .skill-tree-badge,
.high-contrast .skill-tree-badge {
  fill: #ffff00 !important;
  color: #ffff00 !important;
}