/* ==========================================================================
   PROTOTYPE A1: THE INTERCONNECTED HYPERTEXT LAB NOTEBOOK
   Inspired by Devine Lu Linvega's wiki.xxiivv.com × Andy Matuschak's Stacked Notes
   ========================================================================== */

:root,
[data-theme="paper"] {
  --bg-paper: #F6F4EE;
  --bg-card: #FAF9F5;
  --bg-card-active: #FFFFFF;
  --bg-inset: #EFECE3;
  --bg-spine: #ECE8DC;
  --ink: #181816;
  --ink-secondary: #43413B;
  --ink-muted: #6E6A60;
  --wiki-link: #1D4ED8;
  --wiki-link-hover: #1E3A8A;
  --wiki-link-bg: rgba(29, 78, 216, 0.065);
  --wiki-link-border: rgba(29, 78, 216, 0.28);
  --copper: #B45309;
  --copper-bg: rgba(180, 83, 9, 0.085);
  --copper-border: rgba(180, 83, 9, 0.32);
  --alife: #15803D;
  --alife-bg: rgba(21, 128, 61, 0.08);
  --hairline: #DCD8CC;
  --hairline-strong: #B8B2A2;
  --dot-grid: rgba(24, 24, 22, 0.11);
  --shadow-card: -6px 0 18px rgba(24, 24, 22, 0.045);

  --font-serif: 'Newsreader', Georgia, 'Times New Roman', serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

[data-theme="scope"] {
  --bg-paper: #0D1110;
  --bg-card: #121816;
  --bg-card-active: #161E1B;
  --bg-inset: #090C0B;
  --bg-spine: #0F1413;
  --ink: #E8EDE9;
  --ink-secondary: #B2C0BA;
  --ink-muted: #70827B;
  --wiki-link: #60A5FA;
  --wiki-link-hover: #93C5FD;
  --wiki-link-bg: rgba(96, 165, 250, 0.11);
  --wiki-link-border: rgba(96, 165, 250, 0.35);
  --copper: #F59E0B;
  --copper-bg: rgba(245, 158, 11, 0.12);
  --copper-border: rgba(245, 158, 11, 0.38);
  --alife: #34D399;
  --alife-bg: rgba(52, 211, 153, 0.11);
  --hairline: #232E2B;
  --hairline-strong: #3B4E48;
  --dot-grid: rgba(178, 192, 186, 0.11);
  --shadow-card: -8px 0 24px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
  background-color: var(--bg-paper);
  color: var(--ink);
}

body {
  margin: 0;
  background-color: var(--bg-paper);
  color: var(--ink);
  font-family: var(--font-serif);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--wiki-link);
  text-decoration: none;
}

a:hover {
  color: var(--wiki-link-hover);
  text-decoration: underline;
}

img,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ==========================================================================
   1. TOP PROTOTYPE SWITCHER BAR
   ========================================================================== */
.proto-switcher {
  background: #141413;
  color: #D8D4C8;
  border-bottom: 1px solid #2D2C28;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.38rem 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  z-index: 100;
}

.proto-switcher__label {
  color: #9E998E;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 600;
}

.proto-switcher__links {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.proto-switcher__links a {
  color: #C7C3B7;
  padding: 0.18rem 0.52rem;
  border: 1px solid #35332E;
  border-radius: 2px;
  text-decoration: none;
  transition: background-color 0.15s, color 0.15s, border-color 0.15s;
}

.proto-switcher__links a:hover {
  background: #252420;
  color: #FFFFFF;
  border-color: #5C584F;
}

.proto-switcher__links a.is-active {
  background: #B45309;
  color: #FFFDF9;
  border-color: #D97706;
  font-weight: 600;
}

.proto-switcher__links a.proto-root {
  color: #F59E0B;
  border-color: rgba(245, 158, 11, 0.4);
}

/* ==========================================================================
   2. NOTEBOOK MASTHEAD & CONTROLS
   ========================================================================== */
.notebook-header {
  background: var(--bg-paper);
  border-bottom: 1px solid var(--hairline);
  padding: 0.65rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  position: sticky;
  top: 0;
  z-index: 80;
}

.brand-cluster {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.brand-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.92rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.brand-glyph {
  display: inline-grid;
  grid-template-columns: repeat(3, 4px);
  gap: 2px;
  padding: 3px;
  border: 1px solid var(--ink);
}

.brand-glyph span {
  width: 4px;
  height: 4px;
  background: var(--ink);
}

.brand-glyph span:nth-child(2),
.brand-glyph span:nth-child(4),
.brand-glyph span:nth-child(9) {
  background: var(--copper);
}

.brand-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 0.96rem;
  color: var(--ink-secondary);
}

.brand-tagline strong {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--copper);
  letter-spacing: 0.02em;
}

.header-controls {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.ctrl-btn {
  appearance: none;
  background: var(--bg-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  padding: 0.3rem 0.58rem;
  cursor: pointer;
  border-radius: 2px;
  display: inline-flex;
  align-items: center;
  gap: 0.32rem;
  transition: background-color 0.12s, border-color 0.12s, color 0.12s;
}

.ctrl-btn:hover {
  background: var(--bg-inset);
  border-color: var(--ink);
}

.ctrl-btn[aria-pressed="true"] {
  background: var(--copper-bg);
  border-color: var(--copper);
  color: var(--copper);
  font-weight: 600;
}

/* ==========================================================================
   3. WORKSPACE SHELL: LEFT TAXONOMY TREE + RIGHT STAGE
   ========================================================================== */
.notebook-shell {
  display: grid;
  grid-template-columns: 285px minmax(0, 1fr);
  flex: 1;
  min-height: calc(100vh - 82px);
}

/* Left Rail: wiki.xxiivv.com style directory tree */
.taxonomy-rail {
  border-right: 1px solid var(--hairline);
  background: var(--bg-paper);
  padding: 0.85rem 0.75rem 2rem;
  overflow-y: auto;
  max-height: calc(100vh - 82px);
  position: sticky;
  top: 43px;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.rail-intro {
  border: 1px solid var(--hairline);
  background: var(--bg-inset);
  padding: 0.6rem 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  line-height: 1.45;
  color: var(--ink-secondary);
}

.rail-intro__title {
  color: var(--ink);
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.25rem;
}

.rail-search-wrap {
  position: relative;
}

.rail-search {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  padding: 0.38rem 0.55rem;
  background: var(--bg-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  border-radius: 2px;
}

.rail-search:focus {
  outline: 1px solid var(--copper);
  border-color: var(--copper);
}

.tree-branch {
  border-top: 1px solid var(--hairline);
  padding-top: 0.55rem;
}

.tree-branch__heading {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-muted);
  margin: 0 0 0.4rem 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.tree-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--hairline-strong);
  margin-left: 0.35rem;
}

.tree-item {
  position: relative;
}

.tree-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82rem;
  width: 0.45rem;
  border-top: 1px solid var(--hairline-strong);
}

.tree-node-btn {
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 0.26rem 0.4rem 0.26rem 0.65rem;
  cursor: pointer;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  align-items: baseline;
  gap: 0.3rem;
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--ink);
  border-radius: 2px;
  transition: background-color 0.1s;
}

.tree-node-btn:hover {
  background: var(--bg-inset);
}

.tree-node-btn.is-in-stack {
  background: var(--copper-bg);
  font-weight: 600;
}

.tree-node-btn.is-primary-active {
  outline: 1px solid var(--copper);
}

.tree-code {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  font-weight: 600;
  color: var(--copper);
}

.tree-title {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.tree-year {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--ink-muted);
}

.rail-footer {
  margin-top: auto;
  border-top: 1px solid var(--hairline);
  padding-top: 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.69rem;
  color: var(--ink-muted);
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.rail-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

/* ==========================================================================
   4. RIGHT STAGE: INTERACTIVE SVG KNOWLEDGE GRAPH + STACKED NOTES
   ========================================================================== */
.notebook-main {
  display: flex;
  flex-direction: column;
  min-width: 0;
  background: var(--bg-paper);
}

/* Interactive SVG Knowledge Graph Panel */
.graph-panel {
  border-bottom: 1px solid var(--hairline);
  background-color: var(--bg-inset);
  background-image: radial-gradient(var(--dot-grid) 1px, transparent 1px);
  background-size: 14px 14px;
  padding: 0.65rem 1rem 0.75rem;
}

.graph-panel[hidden] {
  display: none !important;
}

.graph-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
}

.graph-toolbar__title {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.graph-cluster-pills {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.cluster-pill {
  appearance: none;
  background: var(--bg-card);
  color: var(--ink-secondary);
  border: 1px solid var(--hairline-strong);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.18rem 0.48rem;
  border-radius: 2px;
  cursor: pointer;
}

.cluster-pill:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.cluster-pill[aria-pressed="true"] {
  background: var(--wiki-link-bg);
  border-color: var(--wiki-link);
  color: var(--wiki-link);
  font-weight: 600;
}

.rabbit-hole-presets {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.45rem;
  padding-top: 0.45rem;
  border-top: 1px dashed var(--hairline-strong);
}

.preset-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  font-weight: 600;
}

.preset-btn {
  appearance: none;
  background: var(--bg-card);
  color: var(--ink);
  border: 1px solid var(--copper-border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.2rem 0.5rem;
  border-radius: 2px;
  cursor: pointer;
  transition: background-color 0.12s;
}

.preset-btn:hover {
  background: var(--copper-bg);
  border-color: var(--copper);
}

.graph-canvas-wrap {
  border: 1px solid var(--hairline-strong);
  background: var(--bg-card);
  background-image: radial-gradient(var(--dot-grid) 1px, transparent 1px);
  background-size: 16px 16px;
  position: relative;
  overflow: hidden;
}

#node-graph {
  width: 100%;
  height: 235px;
  display: block;
  user-select: none;
}

.graph-edge {
  stroke: var(--hairline-strong);
  stroke-width: 1.25;
  fill: none;
  transition: stroke 0.15s, stroke-width 0.15s, opacity 0.15s;
}

.graph-edge.is-highlighted {
  stroke: var(--copper);
  stroke-width: 2.3;
  stroke-dasharray: none;
}

.graph-edge.is-dimmed {
  opacity: 0.18;
}

.graph-node {
  cursor: pointer;
  transition: opacity 0.15s;
}

.graph-node.is-dimmed {
  opacity: 0.25;
}

.graph-node rect.node-box {
  fill: var(--bg-card);
  stroke: var(--ink-secondary);
  stroke-width: 1.2;
  rx: 2px;
  transition: fill 0.12s, stroke 0.12s, stroke-width 0.12s;
}

.graph-node:hover rect.node-box {
  stroke: var(--wiki-link);
  stroke-width: 2;
}

.graph-node.is-open rect.node-box {
  fill: var(--copper-bg);
  stroke: var(--copper);
  stroke-width: 2.2;
}

.graph-node text.node-code {
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 700;
  fill: var(--copper);
}

.graph-node text.node-label {
  font-family: var(--font-serif);
  font-size: 10.5px;
  fill: var(--ink);
}

.graph-status-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.32rem 0.6rem;
  border-top: 1px solid var(--hairline);
  background: var(--bg-paper);
  font-family: var(--font-mono);
  font-size: 0.69rem;
  color: var(--ink-secondary);
}

/* ==========================================================================
   5. ANDY MATUSCHAK HORIZONTAL STACKED NOTES STAGE
   ========================================================================== */
.stack-breadcrumb-bar {
  border-bottom: 1px solid var(--hairline);
  background: var(--bg-paper);
  padding: 0.4rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.stack-trail {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.stack-crumb {
  appearance: none;
  background: var(--bg-inset);
  border: 1px solid var(--hairline-strong);
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.16rem 0.45rem;
  border-radius: 2px;
  cursor: pointer;
}

.stack-crumb:hover {
  border-color: var(--copper);
  color: var(--copper);
}

.stack-crumb.is-last {
  background: var(--copper-bg);
  border-color: var(--copper);
  color: var(--copper);
  font-weight: 600;
}

.note-stack-stage {
  display: flex;
  flex-direction: row;
  align-items: stretch;
  overflow-x: auto;
  overflow-y: hidden;
  flex: 1;
  background: var(--bg-paper);
  scroll-behavior: smooth;
  min-height: 680px;
}

/* Single-Note Focus Mode override */
body[data-stack-mode="off"] .note-stack-stage {
  justify-content: center;
  padding: 1.25rem 1rem 3rem;
  overflow-x: visible;
}

body[data-stack-mode="off"] .note-card {
  width: min(820px, 100%);
  min-width: min(820px, 100%);
  max-width: 820px;
  border: 1px solid var(--hairline-strong);
  box-shadow: var(--shadow-card);
}

/* Individual Evergreen Note Card */
.note-card {
  width: 590px;
  min-width: 590px;
  max-width: 590px;
  border-right: 1px solid var(--hairline-strong);
  background: var(--bg-card);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: row;
  position: relative;
  transition: width 0.2s ease, min-width 0.2s ease, background-color 0.2s;
}

.note-card.is-pulse {
  outline: 2px solid var(--copper);
  outline-offset: -2px;
}

/* Vertical Spine (Andy Matuschak style) */
.note-spine {
  width: 36px;
  min-width: 36px;
  border-right: 1px solid var(--hairline);
  background: var(--bg-spine);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0.7rem 0;
  gap: 0.6rem;
  user-select: none;
  transition: background-color 0.15s;
}

.note-spine:hover {
  background: var(--copper-bg);
}

.note-spine__index {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--copper);
  border: 1px solid var(--copper-border);
  padding: 0.1rem 0.25rem;
  border-radius: 2px;
}

.note-spine__text {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--ink-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-height: 480px;
}

/* Collapsed card state: only shows the vertical spine! */
.note-card.is-collapsed {
  width: 40px;
  min-width: 40px;
  max-width: 40px;
  overflow: hidden;
}

.note-card.is-collapsed .note-spine {
  width: 40px;
  min-width: 40px;
  border-right: none;
}

.note-card.is-collapsed .note-sheet {
  display: none;
}

/* Main scrollable interior of a note */
.note-sheet {
  flex: 1;
  min-width: 0;
  padding: 1.35rem 1.55rem 2.5rem;
  overflow-y: auto;
  max-height: calc(100vh - 150px);
}

body[data-stack-mode="off"] .note-sheet {
  max-height: none;
}

.note-header {
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 0.85rem;
  margin-bottom: 1.1rem;
}

.note-meta-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
}

.note-catalog-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.catalog-id {
  background: var(--copper-bg);
  color: var(--copper);
  border: 1px solid var(--copper-border);
  font-weight: 700;
  padding: 0.12rem 0.42rem;
  border-radius: 2px;
}

.catalog-branch {
  color: var(--ink-muted);
}

.note-actions {
  display: flex;
  align-items: center;
  gap: 0.3rem;
}

.note-action-btn {
  appearance: none;
  background: var(--bg-inset);
  color: var(--ink-secondary);
  border: 1px solid var(--hairline-strong);
  font-family: var(--font-mono);
  font-size: 0.67rem;
  padding: 0.14rem 0.42rem;
  border-radius: 2px;
  cursor: pointer;
}

.note-action-btn:hover {
  border-color: var(--ink);
  color: var(--ink);
}

.note-title {
  font-family: var(--font-serif);
  font-size: 1.58rem;
  font-weight: 600;
  line-height: 1.22;
  margin: 0.25rem 0 0.4rem;
  color: var(--ink);
}

.note-subtitle {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-secondary);
  margin: 0;
}

/* Spec Table (wiki.xxiivv.com style key-value ledger) */
.spec-ledger {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(135px, 1fr));
  border: 1px solid var(--hairline-strong);
  background: var(--bg-inset);
  margin-bottom: 1.15rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

.spec-cell {
  padding: 0.4rem 0.55rem;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.spec-cell__key {
  display: block;
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--ink-muted);
}

.spec-cell__val {
  font-weight: 600;
  color: var(--ink);
}

/* Note Prose & Inline [[Wiki Links]] */
.note-prose {
  font-size: 1.03rem;
  line-height: 1.65;
  color: var(--ink);
}

.note-prose p {
  margin: 0 0 0.95rem;
}

.note-prose h3 {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--copper);
  border-bottom: 1px solid var(--hairline);
  padding-bottom: 0.25rem;
  margin: 1.35rem 0 0.65rem;
}

.note-prose ul {
  margin: 0 0 1rem;
  padding-left: 1.2rem;
}

.note-prose li {
  margin-bottom: 0.4rem;
}

.wiki-link {
  appearance: none;
  display: inline;
  background: var(--wiki-link-bg);
  color: var(--wiki-link);
  border: 1px solid var(--wiki-link-border);
  border-radius: 2px;
  padding: 0.04rem 0.32rem;
  font-family: var(--font-mono);
  font-size: 0.79em;
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  transition: background-color 0.12s, border-color 0.12s, color 0.12s;
}

.wiki-link:hover {
  background: var(--wiki-link);
  color: #FFFFFF;
  border-color: var(--wiki-link);
  text-decoration: none;
}

/* ==========================================================================
   6. EMBEDDED LAB WIDGETS & REAL MEDIA BLOCKS
   ========================================================================== */
.lab-widget {
  border: 1px solid var(--hairline-strong);
  background: var(--bg-inset);
  background-image: radial-gradient(var(--dot-grid) 1px, transparent 1px);
  background-size: 12px 12px;
  padding: 0.75rem;
  margin: 1.1rem 0;
}

.lab-widget__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--hairline-strong);
  padding-bottom: 0.4rem;
  margin-bottom: 0.65rem;
}

/* EA-25 6-Generation Scrubber Widget */
.evo-scrubber-stage {
  background: #0D100F;
  border: 1px solid var(--hairline-strong);
  position: relative;
  overflow: hidden;
}

.evo-scrubber-stage img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  background: #090B0A;
}

.evo-rationale-box {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.45;
  padding: 0.55rem 0.65rem;
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  margin-top: 0.5rem;
  color: var(--ink-secondary);
}

.evo-gen-buttons {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 0.3rem;
  margin-top: 0.5rem;
}

.evo-gen-btn {
  appearance: none;
  background: var(--bg-card);
  color: var(--ink);
  border: 1px solid var(--hairline-strong);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.32rem 0.2rem;
  cursor: pointer;
  text-align: center;
  border-radius: 2px;
}

.evo-gen-btn:hover {
  border-color: var(--copper);
}

.evo-gen-btn[aria-pressed="true"] {
  background: var(--copper);
  color: #FFFFFF;
  border-color: var(--copper);
  font-weight: 700;
}

/* AL-22 Lux Automata 3D Voxel Canvas Widget */
.lux-mini-canvas {
  width: 100%;
  height: 210px;
  background: #090D0C;
  border: 1px solid var(--hairline-strong);
  display: block;
  cursor: crosshair;
}

.lux-telemetry-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  margin-top: 0.45rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
}

.lux-stat {
  background: var(--bg-card);
  border: 1px solid var(--hairline);
  padding: 0.3rem 0.45rem;
}

.lux-stat span {
  display: block;
  font-size: 0.6rem;
  color: var(--ink-muted);
}

.lux-stat strong {
  color: var(--alife);
}

/* Contact Sheets & Media Grids */
.media-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(145px, 1fr));
  gap: 0.55rem;
  margin: 0.85rem 0;
}

.media-figure {
  margin: 0;
  border: 1px solid var(--hairline-strong);
  background: var(--bg-card);
  padding: 0.3rem;
  display: flex;
  flex-direction: column;
}

.media-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--hairline);
}

.media-figure figcaption {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--ink-secondary);
  padding-top: 0.3rem;
  line-height: 1.35;
}

/* Patch PDF Ledger Grid */
.pdf-ledger {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 0.4rem;
  margin: 0.75rem 0;
}

.pdf-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 0.38rem 0.55rem;
  background: var(--bg-card);
  border: 1px solid var(--hairline-strong);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink);
  text-decoration: none;
}

.pdf-item:hover {
  border-color: var(--copper);
  background: var(--copper-bg);
  text-decoration: none;
}

.pdf-item__date {
  font-size: 0.62rem;
  color: var(--ink-muted);
}

/* External Resource Chips */
.ext-links-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1rem 0;
}

.ext-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.28rem 0.58rem;
  background: var(--bg-card);
  border: 1px solid var(--hairline-strong);
  font-family: var(--font-mono);
  font-size: 0.71rem;
  color: var(--ink);
  border-radius: 2px;
  text-decoration: none;
}

.ext-chip:hover {
  border-color: var(--copper);
  color: var(--copper);
  text-decoration: none;
}

.ext-chip--primary {
  background: var(--copper-bg);
  border-color: var(--copper);
  color: var(--copper);
  font-weight: 600;
}

/* ==========================================================================
   7. BIDIRECTIONAL BACKLINKS & RABBIT HOLES BOX
   ========================================================================== */
.backlinks-box {
  margin-top: 1.65rem;
  border: 1px solid var(--hairline-strong);
  background: var(--bg-inset);
  padding: 0.85rem 0.95rem;
}

.backlinks-box__title {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--copper);
  margin: 0 0 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.backlinks-grid {
  display: grid;
  gap: 0.45rem;
}

.backlink-card {
  width: 100%;
  text-align: left;
  appearance: none;
  background: var(--bg-card);
  border: 1px solid var(--hairline-strong);
  padding: 0.5rem 0.65rem;
  cursor: pointer;
  border-radius: 2px;
  transition: border-color 0.12s, background-color 0.12s;
}

.backlink-card:hover {
  border-color: var(--wiki-link);
  background: var(--wiki-link-bg);
}

.backlink-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  margin-bottom: 0.2rem;
}

.backlink-card__node {
  font-weight: 700;
  color: var(--wiki-link);
}

.backlink-card__edge {
  font-size: 0.65rem;
  color: var(--copper);
  background: var(--copper-bg);
  padding: 0.08rem 0.35rem;
  border-radius: 2px;
}

.backlink-card__why {
  font-family: var(--font-serif);
  font-size: 0.86rem;
  color: var(--ink-secondary);
  margin: 0;
  line-height: 1.4;
}

/* ==========================================================================
   8. RESPONSIVE BREAKPOINTS
   ========================================================================== */
@media (max-width: 980px) {
  .notebook-shell {
    grid-template-columns: 1fr;
  }

  .taxonomy-rail {
    position: static;
    max-height: 290px;
    border-right: none;
    border-bottom: 1px solid var(--hairline-strong);
  }

  .note-card {
    width: min(92vw, 560px);
    min-width: min(92vw, 560px);
  }
}