/**
 * ==========================================================================
 * PORTFOLIO BLOG STYLESHEET (Proposal v1 - Retro-Editorial Zine / Garden)
 * Aligned with Proposal v1 Design Tokens (Terracotta, Ochre, Teal, Parchment)
 * Modal styling is centrally defined in system/modal.css
 * ==========================================================================
 */

/* ==========================================================================
   1. STRATA-GRAPH OVERRIDES & DESIGN TOKENS
   ========================================================================== */

:root {
  /* Canvas & Viewport */
  --sg-canvas-bg: var(--color-canvas);
  --sg-canvas-height: 620px;
  --sg-canvas-border: 1px solid var(--color-ink-primary);
  --sg-canvas-shadow: var(--shadow-retro);

  /* Graph Nodes */
  --sg-node-folder-color: var(--color-accent-teal);
  --sg-node-polaroid-bg: var(--color-surface-card);
  --sg-node-folder-radius: 44px;
  --sg-node-article-radius: 36px;
  --sg-node-border-color: var(--color-ink-primary);
  --sg-node-border-width: 2px;
  --sg-node-folder-border-color: var(--color-ink-primary);
  --sg-node-folder-border-width: 2px;
  --sg-node-hover-ring: rgba(210, 90, 56, 0.45);

  /* Badges & Pills */
  --sg-badge-bg: var(--color-primary);
  --sg-badge-text: #FFFFFF;
  --sg-badge-font: var(--font-family-mono);

  /* Breadcrumbs */
  --sg-breadcrumb-bg: var(--color-surface-pulp);
  --sg-breadcrumb-border: 1px solid var(--color-ink-primary);
  --sg-breadcrumb-text: var(--color-ink-primary);
  --sg-breadcrumb-active: var(--color-primary);
  --sg-breadcrumb-hover: var(--color-accent-teal);

  /* Controls */
  --sg-control-bg: var(--color-surface-card);
  --sg-control-text: var(--color-ink-primary);
  --sg-control-border: 1.5px solid var(--color-ink-primary);
  --sg-control-hover-bg: var(--color-surface-pulp);
}

/* ==========================================================================
   2. PAGE HEADER & SECTION INTRO
   ========================================================================== */

.blog-header {
  margin-bottom: 2rem;
  border-bottom: 1.5px dashed var(--color-border-dashed);
  padding-bottom: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: end;
  flex-wrap: wrap;
  gap: 1rem;
}

.blog-section-index {
  font-family: var(--font-family-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-primary);
  margin-bottom: 0.5rem;
  text-transform: uppercase;
}

.blog-title {
  font-family: var(--font-family-display);
  font-size: clamp(2.4rem, 4.5vw, 3.5rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-ink-primary);
  line-height: 1.05;
}

.blog-description {
  font-family: var(--font-family-mono);
  font-size: 0.95rem;
  color: var(--color-ink-muted);
  max-width: 820px;
  line-height: 1.6;
  margin: 0;
}

/* Fallback Banner for No-JS */
.blog-fallback-banner {
  margin-bottom: 1.5rem;
  padding: 0.85rem 1.25rem;
  background: var(--color-surface-card);
  border: 1.5px solid var(--color-ink-primary);
  box-shadow: var(--shadow-retro-small);
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-family-mono);
  font-size: 0.85rem;
  color: var(--color-ink-primary);
}

.blog-fallback-pill {
  background: var(--color-primary);
  color: #FFFFFF;
  padding: 0.2rem 0.6rem;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
  border-radius: 9999px;
  border: 1px solid var(--color-ink-primary);
}

/* ==========================================================================
   3. VIEW SWITCHER BAR (Tactile Monospace Tabs)
   ========================================================================== */

.blog-view-bar {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.blog-view-switch-container {
  display: inline-flex;
  align-items: center;
  background-color: var(--color-surface-card);
  border: 1.5px solid var(--color-ink-primary);
  border-radius: 9999px;
  padding: 0.28rem 0.45rem;
  gap: 0.45rem;
  box-shadow: var(--shadow-retro-small);
  user-select: none;
  transition: box-shadow 0.15s ease;
}

.blog-view-switch-container:hover {
  box-shadow: var(--shadow-retro);
}

/* Mode Labels (Buttons flanking the switch) */
.view-switch-label {
  background-color: transparent;
  border: none;
  color: var(--color-ink-muted);
  font-family: var(--font-family-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.4rem 0.65rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 9999px;
  transition: color 0.15s ease, background-color 0.15s ease, transform 0.1s ease;
  line-height: 1;
}

.view-switch-label:hover:not(:disabled) {
  color: var(--color-ink-primary);
  background-color: var(--color-surface-pulp);
}

.view-switch-label.active {
  background-color: var(--color-surface-pulp);
  font-weight: 700;
}

#btn-view-graph.active {
  color: var(--color-accent-teal);
}

#btn-view-classic.active {
  color: var(--color-primary);
}

.view-switch-label:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.view-switch-label:disabled,
.view-switch-label.disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

/* The Switch Toggle Control */
.view-switch-control {
  position: relative;
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  margin: 0 0.1rem;
}

.view-switch-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  margin: 0;
  pointer-events: none;
}

/* Switch Track */
.view-switch-track {
  width: 50px;
  height: 26px;
  background-color: var(--color-surface-pulp);
  border: 1.5px solid var(--color-ink-primary);
  border-radius: 9999px;
  position: relative;
  display: block;
  transition: background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  box-shadow: inset 1px 1px 2px rgba(30, 30, 28, 0.18);
}

.view-switch-control:hover .view-switch-track {
  background-color: #dfd8cb;
}

/* Switch Thumb / Knob */
.view-switch-thumb {
  position: absolute;
  top: 2px;
  left: 2px;
  width: 18px;
  height: 18px;
  background-color: var(--color-accent-teal);
  border: 1.5px solid var(--color-ink-primary);
  border-radius: 50%;
  box-shadow: 1px 1px 0 var(--color-ink-primary);
  transition: transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.2s ease;
}

.view-switch-thumb::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 4px;
  height: 4px;
  background-color: #FFFFFF;
  border-radius: 50%;
  opacity: 0.9;
}

/* Checked state: Classic View mode */
.view-switch-input:checked+.view-switch-track .view-switch-thumb {
  transform: translateX(24px);
  background-color: var(--color-primary);
}

/* Keyboard focus on switch */
.view-switch-input:focus-visible+.view-switch-track {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Disabled state */
.view-switch-control.disabled,
.view-switch-input:disabled+.view-switch-track {
  opacity: 0.45;
  cursor: not-allowed;
  border-style: dashed;
}

.view-btn-icon {
  font-size: 0.9rem;
}

/* ==========================================================================
   4. MODE 1: INTERACTIVE GRAPH SECTION
   ========================================================================== */

.blog-graph-section {
  margin-bottom: 4rem;
}

#strata-graph-container {
  width: 100%;
}

.strata-graph-wrapper {
  position: relative;
  overflow: hidden;
}

.blog-instructions-card {
  margin-top: 1.5rem;
  padding: 1.15rem 1.5rem;
  border: 1.5px dashed var(--color-border-dashed);
  background-color: var(--color-surface-card);
  box-shadow: var(--shadow-retro-small);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  font-family: var(--font-family-mono);
  font-size: 0.82rem;
  color: var(--color-ink-muted);
}

.blog-instruction-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.blog-instruction-pill {
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 0.7rem;
  padding: 0.18rem 0.55rem;
  border-radius: 9999px;
  border: 1px solid var(--color-ink-primary);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   5. MODE 2: CLASSIC EXPLORER DIRECTORY SECTION
   ========================================================================== */

.blog-classic-section {
  margin-bottom: 4rem;
}

.classic-explorer-layout {
  display: grid;
  grid-template-columns: 310px 1fr;
  gap: 2.25rem;
  align-items: start;
}

/* Left Column: Hierarchical Folder Tree Sidebar */
.classic-tree-sidebar {
  position: sticky;
  top: 2rem;
  display: flex;
  flex-direction: column;
  max-height: calc(100vh - 4rem);
}

.tree-sidebar-header {
  background-color: var(--color-surface-pulp);
  color: var(--color-ink-primary);
  padding: 0.75rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1.5px solid var(--color-ink-primary);
}

.tree-header-title {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  font-family: var(--font-family-display);
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink-primary);
}

.tree-prompt {
  color: var(--color-primary);
  font-weight: 900;
}

.tree-stat-badge {
  font-family: var(--font-family-mono);
  font-size: 0.7rem;
  color: var(--color-ink-muted);
  font-weight: 700;
}

.tree-nav-container {
  padding: 0.85rem 0.6rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  flex: 1 1 auto;
}

.tree-nodes-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-top: 0.3rem;
  position: relative;
}

.tree-node-btn {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  width: 100%;
  padding: 0.45rem 0.6rem;
  background-color: transparent;
  border: 1px solid transparent;
  color: var(--color-ink-primary);
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  transition: background-color 0.12s ease, border-color 0.12s ease;
  border-radius: 2px;
  user-select: none;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-node-btn:hover {
  background-color: var(--color-surface-pulp);
  border-color: rgba(30, 30, 28, 0.3);
}

.tree-node-btn.active {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border-color: var(--color-ink-primary);
  box-shadow: 2px 2px 0 var(--color-ink-primary);
}

.tree-node-btn.active .tree-connector {
  color: #FFFFFF;
}

.tree-node-btn.active .tree-folder-icon,
.tree-node-btn.active .flat-folder-svg {
  color: #FFFFFF;
}

.tree-node-btn.active .tree-node-badge {
  background-color: #FFFFFF;
  color: var(--color-primary);
  border-color: #FFFFFF;
}

.tree-indent {
  display: inline-block;
  width: calc(var(--depth, 0) * 1.15rem);
  flex-shrink: 0;
}

.tree-connector {
  font-family: var(--font-family-mono);
  font-size: 0.85rem;
  color: var(--color-ink-muted);
  flex-shrink: 0;
}

.tree-folder-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent-teal);
}

.flat-folder-svg {
  display: block;
  fill: currentColor;
  color: var(--color-accent-teal);
  transition: transform 0.12s ease;
}

.tree-node-btn:hover .flat-folder-svg {
  transform: scale(1.08);
}

.tree-node-label {
  flex-grow: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  letter-spacing: 0.03em;
}

.tree-sidebar-footer {
  border-top: 1px dashed var(--color-border-dashed);
  background-color: var(--color-surface-pulp);
  padding: 0.65rem 0.95rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  font-family: var(--font-family-mono);
  font-size: 0.7rem;
  color: var(--color-ink-muted);
}

.tree-legend-item {
  display: flex;
  align-items: center;
  gap: 0.45rem;
}

.tree-legend-dot {
  color: var(--color-primary);
  font-size: 0.9rem;
}

/* Right Column: Content Children Pane */
.classic-content-pane {
  min-width: 0;
}

/* Active Directory Scope Bar */
.classic-scope-bar {
  background-color: var(--color-surface-card);
  border: 1.5px solid var(--color-ink-primary);
  box-shadow: var(--shadow-retro);
  padding: 1.35rem 1.6rem;
  margin-bottom: 2rem;
}

.scope-bar-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.85rem;
}

.scope-badge {
  background-color: var(--color-primary);
  color: #FFFFFF;
  font-family: var(--font-family-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.2rem 0.6rem;
  letter-spacing: 0.06em;
  border-radius: 9999px;
  border: 1px solid var(--color-ink-primary);
}

.scope-path-display {
  font-family: var(--font-family-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-ink-primary);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.scope-stats-pill {
  margin-left: auto;
  background-color: var(--color-accent-teal);
  color: #FFFFFF;
  font-family: var(--font-family-mono);
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.18rem 0.6rem;
  border-radius: 9999px;
  border: 1px solid var(--color-ink-primary);
}

.scope-heading {
  font-family: var(--font-family-display);
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin: 0 0 0.5rem 0;
  color: var(--color-ink-primary);
  line-height: 1.2;
}

.scope-description {
  font-family: var(--font-family-mono);
  font-size: 0.92rem;
  color: var(--color-ink-muted);
  line-height: 1.6;
  margin: 0;
}

/* Child Subdirectories */
.classic-child-subfolders {
  margin-bottom: 2rem;
  background-color: var(--color-surface-card);
  border: 1.5px dashed var(--color-border-dashed);
  padding: 1.15rem 1.35rem;
  box-shadow: var(--shadow-retro-small);
}

.child-subfolders-header {
  margin-bottom: 0.85rem;
}

.child-subfolders-label {
  font-family: var(--font-family-display);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink-primary);
}

.child-subfolders-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 1rem;
}

.child-subfolder-card {
  background-color: var(--color-surface-card);
  border: 1.5px solid var(--color-ink-primary);
  box-shadow: var(--shadow-retro-small);
  padding: 0.85rem 1rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  transition: transform 0.12s ease, box-shadow 0.12s ease, background-color 0.12s ease;
  border-radius: 2px;
}

.child-subfolder-card:hover {
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-retro);
  background-color: var(--color-surface-pulp);
}

.child-folder-top {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.child-folder-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--color-accent-teal);
}

.child-folder-name {
  font-family: var(--font-family-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-ink-primary);
  letter-spacing: 0.03em;
}

.child-folder-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-family-mono);
  font-size: 0.72rem;
  color: var(--color-ink-muted);
}

.child-folder-enter-btn {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border: 1px solid var(--color-ink-primary);
  font-family: var(--font-family-mono);
  font-size: 0.7rem;
  font-weight: 700;
  padding: 0.22rem 0.55rem;
  cursor: pointer;
  box-shadow: 1px 1px 0 var(--color-ink-primary);
  transition: background-color 0.12s ease, transform 0.1s ease;
  border-radius: 1px;
}

.child-folder-enter-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translate(-1px, -1px);
}

/* Empty Directory State */
.classic-empty-directory {
  margin-bottom: 2rem;
}

.empty-dir-box {
  border: 2px dashed var(--color-border-dashed);
  background-color: var(--color-surface-card);
  padding: 3rem 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-retro-small);
}

.empty-dir-code {
  font-family: var(--font-family-mono);
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.08em;
  margin-bottom: 0.75rem;
}

.empty-dir-text {
  font-family: var(--font-family-mono);
  font-size: 0.92rem;
  color: var(--color-ink-muted);
  max-width: 520px;
  margin: 0 auto 1.5rem auto;
  line-height: 1.6;
}

.empty-dir-back-btn {
  background-color: var(--color-primary);
  color: #FFFFFF;
  border: 1.5px solid var(--color-ink-primary);
  font-family: var(--font-family-mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.6rem 1.25rem;
  cursor: pointer;
  box-shadow: var(--shadow-retro-small);
  transition: transform 0.1s ease, box-shadow 0.1s ease, background-color 0.15s ease;
}

.empty-dir-back-btn:hover {
  background-color: var(--color-primary-hover);
  transform: translate(-1px, -1px);
  box-shadow: var(--shadow-retro);
}

/* Article Cards List */
.classic-articles-list {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.classic-meta-left {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.65rem;
  color: var(--color-ink-muted);
}

.classic-article-date {
  color: var(--color-ink-primary);
  font-weight: 700;
}

.classic-reading-time {
  color: var(--color-ink-muted);
}

.classic-words-badge {
  background-color: var(--color-surface-pulp);
  border: 1px solid var(--color-ink-primary);
  padding: 0.12rem 0.45rem;
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--color-ink-primary);
}

.classic-article-title {
  font-family: var(--font-family-display);
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-ink-primary);
  margin: 0 0 0.75rem 0;
  line-height: 1.15;
}

.classic-title-link {
  background: none;
  border: none;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  text-align: left;
  cursor: pointer;
  display: inline;
  transition: color 0.15s ease;
}

.classic-title-link:hover {
  color: var(--color-primary);
  text-decoration: underline;
}

.classic-article-summary {
  font-family: var(--font-family-mono);
  font-size: 0.92rem;
  line-height: 1.6;
  color: var(--color-ink-muted);
  margin: 0 0 1.25rem 0;
}

.classic-tags-list {
  margin-bottom: 1.35rem;
}

.classic-tag-item {
  font-family: var(--font-family-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-ink-primary);
  background-color: var(--color-surface-pulp);
  border: 1px solid var(--color-ink-primary);
  padding: 0.2rem 0.55rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  display: inline-block;
}

/* Card Actions (Open Modal) */
.classic-card-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding-top: 1rem;
  border-top: 1.5px dashed var(--color-border-dashed);
}

.classic-action-hint {
  font-family: var(--font-family-mono);
  font-size: 0.72rem;
  color: var(--color-ink-muted);
  font-weight: 600;
  letter-spacing: 0.05em;
}

/* ==========================================================================
   6. RESPONSIVE BREAKPOINTS
   ========================================================================== */

@media (max-width: 768px) {
  :root {
    --sg-canvas-height: 440px;
    --sg-node-folder-radius: 36px;
    --sg-node-article-radius: 28px;
  }

  .blog-title {
    font-size: 2rem;
  }

  .blog-view-bar {
    width: 100%;
    justify-content: stretch;
  }

  .blog-view-switch-container {
    width: 100%;
    justify-content: space-between;
    padding: 0.28rem 0.35rem;
  }

  .view-switch-label {
    flex: 1;
    justify-content: center;
    padding: 0.38rem 0.35rem;
    font-size: 0.72rem;
    gap: 0.35rem;
  }

  .view-switch-control {
    flex-shrink: 0;
  }

  .classic-article-card {
    padding: 1.25rem 1rem;
  }

  .classic-article-title {
    font-size: 1.35rem;
  }

  .classic-card-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.45rem;
  }

  .classic-meta-right {
    align-self: flex-start;
  }

  .blog-instructions-card {
    flex-direction: column;
    gap: 0.85rem;
  }

  .classic-explorer-layout {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .classic-tree-sidebar {
    position: static;
    max-height: none;
  }

  .tree-nav-container {
    max-height: 260px;
  }

  .child-subfolders-grid {
    grid-template-columns: 1fr;
  }
}

/* Article Styling */
.article-markdown-body img {
  display: block;
  width: 100%;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}