/* ==========================================================================
   SKILL VIEW PAGE - Dark Theme
   ========================================================================== */
:root {
  --primary-color: #4F46E5;
  --secondary-color: #7C3AED;
  --accent-primary: #A78BFA;
  --bg-primary: #0D0C1D;
  --bg-secondary: #1A1A2E;
  --surface-glass: rgba(255, 255, 255, 0.05);
  --surface-glass-hover: rgba(255, 255, 255, 0.08);
  --text-primary: #FFFFFF;
  --text-secondary: #9CA3AF;
  --text-tertiary: #6B7280;
  --text-headings: #E5E7EB;
  --border-glass: rgba(255, 255, 255, 0.1);
  --border-glass-hover: rgba(255, 255, 255, 0.2);
  --card-bg: rgba(255, 255, 255, 0.03);
  --card-bg-hover: rgba(255, 255, 255, 0.06);
  --dropdown-bg: #0D0C1D;
  --transition-speed: 0.3s;
  --transition-ease: cubic-bezier(0.4, 0, 0.2, 1);
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: hidden; }

body {
  min-height: 100vh;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  line-height: 1.6;
  position: relative;
  isolation: isolate;
}

body::before {
  content: '';
  position: fixed;
  top: -20%; left: -20%;
  width: 60%; height: 60%;
  background: radial-gradient(circle, var(--primary-color) 0%, transparent 70%);
  opacity: 0.12;
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

body::after {
  content: '';
  position: fixed;
  bottom: -20%; right: -20%;
  width: 60%; height: 60%;
  background: radial-gradient(circle, var(--accent-primary) 0%, transparent 70%);
  opacity: 0.12;
  filter: blur(100px);
  z-index: -1;
  pointer-events: none;
}

/* ---- Breadcrumb ---- */
.breadcrumb-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  flex-wrap: wrap;
}

.breadcrumb-item {
  color: var(--text-tertiary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color var(--transition-speed);
}

.breadcrumb-item:hover { color: var(--accent-primary); }
.breadcrumb-item.active { color: var(--text-secondary); }

.breadcrumb-separator {
  color: var(--text-tertiary);
  font-size: 0.7rem;
}

/* ---- Skill Hero ---- */
.skill-hero {
  margin-bottom: 2.5rem;
}

.skill-header { margin-bottom: 1.5rem; }

.skill-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  background: linear-gradient(135deg, #fff 0%, var(--accent-primary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.skill-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
}

.category-badge {
  padding: 0.25rem 0.75rem;
  background: rgba(79, 70, 229, 0.15);
  color: var(--accent-primary);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.difficulty-badge {
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 600;
}

.badge-beginner { background: rgba(5, 150, 105, 0.2); color: #34d399; }
.badge-intermediate { background: rgba(217, 119, 6, 0.2); color: #fbbf24; }
.badge-advanced { background: rgba(220, 38, 38, 0.2); color: #f87171; }

.pack-badge, .platform-badge {
  padding: 0.25rem 0.75rem;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

/* ---- Shared Nav Buttons ---- */
.button {
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-speed);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  text-align: center;
  font-size: 0.95rem;
  line-height: 1;
  text-decoration: none;
}

.button:hover {
  color: var(--text-primary);
}

.button-primary {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: var(--text-primary);
  border: 1px solid transparent;
}

.button-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(79, 70, 229, 0.4);
}

.button-outline {
  background: transparent;
  border: 1px solid var(--border-glass);
  color: var(--text-primary);
}

.button-outline:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
}

/* ---- Stats Row ---- */
.skill-stats-row {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  flex-wrap: wrap;
}

.stat-box {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 1rem;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
}

.stat-box i {
  color: var(--accent-primary);
  font-size: 0.9rem;
}

.stat-value {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}

.stat-label {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ---- Action Buttons ---- */
.skill-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.25rem;
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  background: var(--surface-glass);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all var(--transition-speed);
}

.action-btn:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
  transform: translateY(-1px);
  color: var(--text-primary);
}

.action-btn-primary {
  background: var(--primary-color);
  border-color: var(--primary-color);
  color: #fff;
}

.action-btn-primary:hover {
  background: var(--secondary-color);
  border-color: var(--secondary-color);
  color: #fff;
}

.action-btn-download {
  background: rgba(16, 185, 129, 0.15);
  border-color: rgba(16, 185, 129, 0.3);
  color: #34d399;
}

.action-btn-download:hover {
  background: rgba(16, 185, 129, 0.25);
  color: #34d399;
}

.action-btn-upvote.upvoted {
  background: rgba(239, 68, 68, 0.15);
  border-color: rgba(239, 68, 68, 0.3);
  color: #f87171;
}

.action-btn-save.saved {
  background: rgba(79, 70, 229, 0.15);
  border-color: rgba(79, 70, 229, 0.3);
  color: var(--accent-primary);
}

/* ---- Layout ---- */
.skill-layout {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 2rem;
}

/* ---- Main Content ---- */
.skill-main {}

.skill-section {
  margin-bottom: 2rem;
  padding: 1.5rem;
  background: var(--card-bg);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
}

.skill-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-headings);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.skill-section h2 i {
  color: var(--accent-primary);
  font-size: 0.95rem;
}

.skill-section p {
  color: var(--text-secondary);
  line-height: 1.7;
}

.skill-description-text {
  font-size: 1rem;
}

.bundle-explorer-heading {
  margin-bottom: 1rem;
}

.bundle-explorer-summary {
  margin-top: 0.35rem;
  font-size: 0.92rem;
}

.bundle-explorer-shell {
  display: grid;
  grid-template-columns: minmax(220px, 290px) minmax(0, 1fr);
  gap: 1rem;
}

.bundle-tree-panel,
.bundle-file-panel {
  min-width: 0;
}

.bundle-tree-panel {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 0.85rem;
}

.bundle-tree-root {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  margin-bottom: 0.85rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-glass);
  color: var(--text-primary);
  font-weight: 700;
}

.bundle-tree-root i,
.bundle-tree-folder summary i,
.bundle-tree-file i {
  color: var(--accent-primary);
}

.bundle-tree-list {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.bundle-tree-folder {
  margin-left: 0;
}

.bundle-tree-folder summary {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.4rem 0.5rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  list-style: none;
  user-select: none;
}

.bundle-tree-folder summary::-webkit-details-marker {
  display: none;
}

.bundle-tree-folder summary:hover,
.bundle-tree-file:hover {
  background: var(--surface-glass);
}

.bundle-tree-folder .folder-caret {
  font-size: 0.72rem;
  transition: transform var(--transition-speed);
}

.bundle-tree-folder[open] > summary .folder-caret {
  transform: rotate(90deg);
}

.bundle-tree-children {
  margin-left: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.18rem;
}

.bundle-tree-file {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 0.6rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  text-align: left;
}

.bundle-tree-file.is-active {
  background: rgba(79, 70, 229, 0.15);
  border-color: rgba(79, 70, 229, 0.3);
  color: var(--text-primary);
}

.bundle-file-panel {
  background: rgba(0, 0, 0, 0.22);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.bundle-file-view {
  display: none;
}

.bundle-file-view.is-active {
  display: block;
}

.bundle-file-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1rem 0.85rem;
  border-bottom: 1px solid var(--border-glass);
}

.bundle-file-path {
  color: var(--text-primary);
  font-weight: 700;
  word-break: break-word;
}

.bundle-file-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.45rem;
  font-size: 0.78rem;
  color: var(--text-tertiary);
}

.bundle-file-kind {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.45rem;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: 999px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.bundle-file-code-wrap {
  max-height: 680px;
  overflow: auto;
}

.bundle-file-code-wrap pre {
  margin: 0;
  padding: 1rem 1.1rem 1.2rem;
}

.bundle-file-code-wrap code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}

/* Skill content code block */
.skill-content-section {}

.skill-content-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.skill-content-header h2 { margin-bottom: 0; }

.copy-inline-btn {
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 0.35rem 0.75rem;
  font-size: 0.8rem;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.copy-inline-btn:hover {
  background: var(--surface-glass-hover);
  color: var(--text-primary);
}

.skill-content-box {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  overflow: auto;
  max-height: 600px;
}

.skill-content-box pre {
  margin: 0;
  padding: 1.25rem;
}

.skill-content-box code {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
}

/* ---- Sidebar ---- */
.skill-sidebar {}

.sidebar-card {
  background: var(--card-bg);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.sidebar-card h3 {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-headings);
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--border-glass);
}

.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.4rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

.detail-row:last-child { border-bottom: none; }

.detail-label {
  font-size: 0.82rem;
  color: var(--text-tertiary);
}

.detail-value {
  font-size: 0.82rem;
  color: var(--text-secondary);
  font-weight: 500;
  text-align: right;
}

.detail-value code {
  background: var(--surface-glass);
  padding: 0.15rem 0.4rem;
  border-radius: var(--radius-sm);
  font-size: 0.78rem;
}

/* Tags */
.tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.tag-link {
  padding: 0.2rem 0.6rem;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--text-tertiary);
  text-decoration: none;
  transition: all var(--transition-speed);
}

.tag-link:hover {
  background: rgba(79, 70, 229, 0.15);
  color: var(--accent-primary);
  border-color: rgba(79, 70, 229, 0.3);
}

/* Related skills */
.related-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.related-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.75rem;
  background: var(--surface-glass);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: all var(--transition-speed);
}

.related-item:hover {
  background: var(--surface-glass-hover);
  border-color: var(--border-glass-hover);
}

.related-name {
  font-size: 0.85rem;
  color: var(--text-primary);
  font-weight: 500;
}

.related-upvotes {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

/* ---- Toast ---- */
.skill-toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: rgba(16, 185, 129, 0.95);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 10000;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
  transition: opacity 0.3s;
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .skill-layout {
    grid-template-columns: 1fr;
  }

  .bundle-explorer-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .skill-stats-row { gap: 0.75rem; }
  .stat-box { padding: 0.4rem 0.75rem; }
  .skill-actions { flex-direction: column; }
  .action-btn { justify-content: center; }
  .skill-content-box { max-height: 400px; }
  .bundle-file-toolbar {
    flex-direction: column;
    align-items: flex-start;
  }
  .bundle-copy-btn {
    width: 100%;
    justify-content: center;
  }
}