/* ==========================================================================
   Prototype C2: The Story-First Personal Monograph
   (Tufte Sidenotes Essay + Interactive Margin Plates + Archival Ledger)
   Inspired by Craig Mod, Edward Tufte's Beautiful Evidence, Cabinet & Stripe Press
   ========================================================================== */

:root {
  /* Warm Archival Book Paper Palette (Default Light Mode) */
  --bg-paper: #FAF7F0;
  --bg-well: #F2EDE2;
  --bg-well-hover: #EAE3D3;
  --bg-elevated: #FFFDF9;
  --ink-primary: #1C1B18;
  --ink-secondary: #3E3B34;
  --ink-caption: #5A554C;
  --ink-muted: #7C7569;
  --accent-vermilion: #C84B31;
  --accent-vermilion-soft: rgba(200, 75, 49, 0.12);
  --accent-verdigris: #2E6F5E;
  --accent-verdigris-soft: rgba(46, 111, 94, 0.12);
  --accent-ochre: #9A6B26;
  --rule-hairline: #DCD5C6;
  --rule-strong: #B8AFA0;
  --shadow-plate: 0 4px 20px -4px rgba(28, 27, 24, 0.08), 0 1px 3px rgba(28, 27, 24, 0.05);
  --shadow-modal: 0 24px 60px -12px rgba(20, 18, 15, 0.35);

  /* Typography */
  --font-serif: 'Newsreader', 'Iowan Old Style', 'Palatino Linotype', 'Book Antiqua', Palatino, Georgia, serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, monospace;

  /* Layout Rhythm & Tufte Measure */
  --measure-prose: 60ch;
  --measure-margin: 36ch;
  --column-gap: 3.5rem;
}

[data-theme="dark"] {
  /* Lampblack Study Darkroom Mode */
  --bg-paper: #161513;
  --bg-well: #201E1B;
  --bg-well-hover: #292622;
  --bg-elevated: #24221E;
  --ink-primary: #EAE4D7;
  --ink-secondary: #C9C1B2;
  --ink-caption: #9E9688;
  --ink-muted: #7A7367;
  --accent-vermilion: #E26348;
  --accent-vermilion-soft: rgba(226, 99, 72, 0.16);
  --accent-verdigris: #4CA38D;
  --accent-verdigris-soft: rgba(76, 163, 141, 0.15);
  --accent-ochre: #D49B4B;
  --rule-hairline: #2E2B26;
  --rule-strong: #46413A;
  --shadow-plate: 0 6px 24px -4px rgba(0, 0, 0, 0.45);
  --shadow-modal: 0 28px 70px -10px rgba(0, 0, 0, 0.75);
}

/* Base Reset & Smooth Archival Defaults */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background-color: var(--bg-paper);
  color: var(--ink-primary);
  font-family: var(--font-serif);
  font-size: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background-color: var(--bg-paper);
  color: var(--ink-primary);
  font-variant-numeric: oldstyle-nums proportional-nums;
  font-optical-sizing: auto;
  transition: background-color 0.25s ease, color 0.25s ease;
  overflow-x: hidden;
}

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

a {
  color: var(--ink-primary);
  text-decoration-color: var(--accent-vermilion);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.2em;
  transition: color 0.15s ease, text-decoration-color 0.15s ease, background-color 0.15s ease;
}

a:hover {
  color: var(--accent-vermilion);
  text-decoration-thickness: 1.5px;
}

/* ==========================================================================
   1. Top Prototype Switcher Bar (Required Across All 5 Prototypes)
   ========================================================================== */
.proto-switcher {
  background: #141311;
  color: #D8D2C5;
  border-bottom: 1px solid #2C2924;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.4;
  padding: 0.45rem 1rem;
  position: relative;
  z-index: 60;
}

.proto-switcher__inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.proto-switcher__label {
  color: #9A9283;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  font-weight: 500;
}

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

.proto-switcher__links a {
  color: #C7C0B2;
  text-decoration: none;
  padding: 0.2rem 0.55rem;
  border-radius: 3px;
  border: 1px solid transparent;
  transition: all 0.15s ease;
}

.proto-switcher__links a:hover {
  color: #FAF7F0;
  background: rgba(255, 255, 255, 0.07);
  border-color: #3E3A33;
}

.proto-switcher__links a[aria-current="page"] {
  background: #C84B31;
  color: #FFFDF9;
  font-weight: 600;
  border-color: #C84B31;
}

.proto-switcher__links a.proto-switcher__root {
  color: #63B9A2;
  border-color: rgba(99, 185, 162, 0.35);
}

/* ==========================================================================
   2. Sticky Monograph Running Header (Colophon, Chapter Jump & Theme Toggle)
   ========================================================================== */
.monograph-bar {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: color-mix(in srgb, var(--bg-paper) 92%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.monograph-bar__inner {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0.55rem 1.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem 1rem;
}

.monograph-bar__brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--ink-primary);
  font-weight: 600;
}

.monograph-bar__sigil {
  display: inline-block;
  padding: 0.1rem 0.45rem;
  background: var(--ink-primary);
  color: var(--bg-paper);
  border-radius: 2px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.monograph-bar__chapters {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.25rem;
}

.monograph-bar__chapters a {
  text-decoration: none;
  color: var(--ink-caption);
  padding: 0.2rem 0.48rem;
  border-radius: 2px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.monograph-bar__chapters a:hover,
.monograph-bar__chapters a.is-active {
  color: var(--accent-vermilion);
  background: var(--accent-vermilion-soft);
}

.monograph-bar__controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.mono-btn {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  line-height: 1.2;
  color: var(--ink-primary);
  background: var(--bg-well);
  border: 1px solid var(--rule-strong);
  padding: 0.34rem 0.65rem;
  border-radius: 3px;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.15s ease;
}

.mono-btn:hover {
  border-color: var(--accent-vermilion);
  color: var(--accent-vermilion);
  background: var(--bg-well-hover);
}

.mono-btn--verdigris {
  border-color: var(--accent-verdigris);
  color: var(--accent-verdigris);
  background: var(--accent-verdigris-soft);
}

.mono-btn--verdigris:hover {
  background: var(--accent-verdigris);
  color: var(--bg-paper);
  border-color: var(--accent-verdigris);
}

.mono-btn--vermilion {
  border-color: var(--accent-vermilion);
  color: var(--accent-vermilion);
  background: var(--accent-vermilion-soft);
}

.mono-btn--vermilion:hover {
  background: var(--accent-vermilion);
  color: #FFFDF9;
}

/* ==========================================================================
   3. Monograph Layout Grid (60ch Narrative Essay + 36ch Right Margin Lane)
   ========================================================================== */
.monograph-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 3.5rem 1.5rem 5rem;
}

.tufte-grid {
  display: grid;
  grid-template-columns: minmax(0, var(--measure-prose)) minmax(280px, var(--measure-margin));
  column-gap: var(--column-gap);
  align-items: start;
}

/* Frontispice / Title Page Header */
.monograph-masthead {
  border-bottom: 2px solid var(--ink-primary);
  padding-bottom: 2.25rem;
  margin-bottom: 3rem;
  position: relative;
}

.monograph-masthead::after {
  content: "";
  display: block;
  height: 1px;
  background: var(--rule-strong);
  position: absolute;
  left: 0;
  right: 0;
  bottom: -5px;
}

.masthead-kicker {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-vermilion);
  margin-bottom: 0.75rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem;
}

.masthead-title {
  font-family: var(--font-serif);
  font-size: clamp(2.5rem, 5vw, 3.85rem);
  font-weight: 500;
  line-height: 1.06;
  letter-spacing: -0.02em;
  margin: 0 0 0.35rem;
  color: var(--ink-primary);
}

.masthead-thats-right {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: clamp(1.45rem, 2.6vw, 2.05rem);
  color: var(--ink-secondary);
  margin: 0 0 1.35rem;
  font-weight: 400;
}

.masthead-deck {
  font-size: 1.18rem;
  line-height: 1.65;
  color: var(--ink-secondary);
  max-width: 62ch;
  margin: 0 0 1.4rem;
}

.masthead-meta-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-caption);
}

/* ==========================================================================
   4. Narrative Prose & Chapter Styling
   ========================================================================== */
.chapter-section {
  padding-bottom: 3.25rem;
  margin-bottom: 3.25rem;
  border-bottom: 1px solid var(--rule-hairline);
}

.chapter-header {
  grid-column: 1 / 2;
  margin-bottom: 1.5rem;
}

.chapter-numeral {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-vermilion);
  display: block;
  margin-bottom: 0.35rem;
  font-weight: 600;
}

.chapter-title {
  font-family: var(--font-serif);
  font-size: clamp(1.55rem, 2.5vw, 2.05rem);
  font-weight: 500;
  line-height: 1.22;
  margin: 0 0 0.4rem;
  color: var(--ink-primary);
}

.chapter-rubric {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.05rem;
  line-height: 1.5;
  color: var(--ink-caption);
  margin: 0;
}

/* Prose Blocks paired with Sidenote Margin Plates */
.tufte-row {
  display: contents;
}

.prose-cell {
  grid-column: 1 / 2;
}

.prose-cell p {
  font-size: 1.2rem;
  line-height: 1.75;
  margin: 0 0 1.35rem;
  color: var(--ink-primary);
  max-width: var(--measure-prose);
}

/* Classical drop cap for the Prologue opening paragraph */
.prose-cell p.has-dropcap::first-letter {
  float: left;
  font-family: var(--font-serif);
  font-size: 3.7rem;
  line-height: 0.84;
  padding-right: 0.55rem;
  padding-top: 0.18rem;
  color: var(--accent-vermilion);
  font-weight: 500;
}

.prose-lead-in {
  font-variant-caps: small-caps;
  letter-spacing: 0.05em;
  font-weight: 600;
  font-size: 1.05em;
}

/* Interactive Footnote Superscript Anchor [1] - [16] */
.fn-ref {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--accent-vermilion);
  background: var(--accent-vermilion-soft);
  border: 1px solid rgba(200, 75, 49, 0.32);
  padding: 0.05rem 0.34rem;
  border-radius: 3px;
  margin: 0 0.15rem;
  vertical-align: baseline;
  position: relative;
  top: -0.18em;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.fn-ref:hover,
.fn-ref.is-active {
  background: var(--accent-vermilion);
  color: #FFFDF9;
  border-color: var(--accent-vermilion);
  box-shadow: 0 0 0 3px var(--accent-vermilion-soft);
}

/* ==========================================================================
   5. Tufte Margin Specimen Plates (Right Column [Fig. 01] – [Fig. 16])
   ========================================================================== */
.margin-cell {
  grid-column: 2 / 3;
  margin-bottom: 1.65rem;
  position: relative;
}

.specimen-plate {
  background: var(--bg-well);
  border: 1px solid var(--rule-hairline);
  border-left: 3px solid var(--rule-strong);
  border-radius: 4px;
  padding: 0.9rem 1rem;
  box-shadow: var(--shadow-plate);
  position: relative;
  transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

/* Vermilion Connector Line to the Left Prose Column */
.specimen-plate::before {
  content: "";
  position: absolute;
  top: 1.25rem;
  left: -2.25rem;
  width: 2.1rem;
  height: 1px;
  background: var(--rule-hairline);
  transition: background-color 0.2s ease, height 0.2s ease, width 0.2s ease;
  pointer-events: none;
}

.specimen-plate:hover,
.specimen-plate.is-highlighted {
  border-color: var(--accent-vermilion);
  border-left-color: var(--accent-vermilion);
  background: var(--bg-elevated);
  transform: translateX(-2px);
  box-shadow: 0 8px 28px -6px rgba(200, 75, 49, 0.2);
}

.specimen-plate:hover::before,
.specimen-plate.is-highlighted::before {
  background: var(--accent-vermilion);
  height: 2px;
  left: -3.2rem;
  width: 3.1rem;
}

.specimen-plate__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px dashed var(--rule-hairline);
  font-family: var(--font-mono);
  font-size: 0.74rem;
}

.specimen-plate__fig {
  color: var(--accent-vermilion);
  font-weight: 600;
  letter-spacing: 0.04em;
}

.specimen-plate__date {
  color: var(--ink-muted);
  font-size: 0.7rem;
}

.specimen-plate__title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.3;
  margin: 0 0 0.45rem;
  color: var(--ink-primary);
}

.specimen-plate__media {
  margin: 0.5rem 0 0.65rem;
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--rule-strong);
  background: #141311;
  position: relative;
}

.specimen-plate__media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: filter 0.3s ease, transform 0.3s ease;
}

/* PaperPiAI E-Ink Bistable Refresh Flash Animation */
@keyframes eink-bistable-flash {
  0% { filter: invert(0) contrast(1); }
  22% { filter: invert(1) grayscale(1) contrast(2.5); }
  50% { filter: invert(0) grayscale(1) brightness(1.6) contrast(2); }
  78% { filter: invert(1) sepia(0.3) contrast(1.8); }
  100% { filter: invert(0) contrast(1); }
}

.specimen-plate__media.is-eink-flashing img {
  animation: eink-bistable-flash 0.65s steps(4, end);
}

.specimen-plate__caption {
  font-family: var(--font-serif);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--ink-caption);
  margin: 0 0 0.65rem;
}

.specimen-plate__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-top: 0.55rem;
}

.plate-tag {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  line-height: 1.25;
  padding: 0.25rem 0.5rem;
  border-radius: 2px;
  background: var(--bg-paper);
  border: 1px solid var(--rule-strong);
  color: var(--ink-secondary);
  text-decoration: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  transition: all 0.15s ease;
}

.plate-tag:hover {
  border-color: var(--accent-vermilion);
  color: var(--accent-vermilion);
  background: var(--accent-vermilion-soft);
}

.plate-tag--vermilion {
  background: var(--accent-vermilion-soft);
  border-color: var(--accent-vermilion);
  color: var(--accent-vermilion);
  font-weight: 500;
}

.plate-tag--vermilion:hover {
  background: var(--accent-vermilion);
  color: #FFFDF9;
}

.plate-tag--verdigris {
  background: var(--accent-verdigris-soft);
  border-color: var(--accent-verdigris);
  color: var(--accent-verdigris);
  font-weight: 500;
}

.plate-tag--verdigris:hover {
  background: var(--accent-verdigris);
  color: #FFFDF9;
}

/* ==========================================================================
   6. Live Interactive Margin Widgets (Fig. 04 Scrubber, Fig. 06 3D CA, Contact Grids)
   ========================================================================== */

/* Fig. 04: 6-Generation Phenotype Scrubber */
.evo-scrubber-box {
  background: var(--bg-paper);
  border: 1px solid var(--rule-hairline);
  border-radius: 3px;
  padding: 0.55rem;
  margin-bottom: 0.65rem;
}

.evo-pills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.28rem;
  margin-bottom: 0.45rem;
}

.evo-pill-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  padding: 0.24rem 0.3rem;
  border: 1px solid var(--rule-strong);
  background: var(--bg-well);
  color: var(--ink-secondary);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.evo-pill-btn:hover {
  border-color: var(--accent-vermilion);
  color: var(--accent-vermilion);
}

.evo-pill-btn[aria-pressed="true"] {
  background: var(--accent-vermilion);
  color: #FFFDF9;
  border-color: var(--accent-vermilion);
  font-weight: 600;
}

.evo-rationale {
  font-family: var(--font-mono);
  font-size: 0.69rem;
  line-height: 1.45;
  color: var(--ink-caption);
  min-height: 3.9em;
}

/* Fig. 06: Live Mini 3D Voxel Cellular Automata Sketch */
.lux-mini-canvas-wrap {
  position: relative;
  aspect-ratio: 16 / 10;
  background: #101211;
  border-radius: 3px;
  overflow: hidden;
  border: 1px solid var(--rule-strong);
  margin: 0.5rem 0;
  cursor: crosshair;
}

.lux-mini-canvas {
  width: 100%;
  height: 100%;
  display: block;
}

.lux-mini-hud {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.67rem;
  color: var(--ink-caption);
  background: var(--bg-paper);
  border: 1px solid var(--rule-hairline);
  padding: 0.35rem 0.5rem;
  border-radius: 2px;
  margin-bottom: 0.45rem;
}

.lux-rule-pills {
  display: flex;
  gap: 0.28rem;
  margin-bottom: 0.55rem;
}

.lux-rule-btn {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  padding: 0.22rem 0.3rem;
  border: 1px solid var(--rule-strong);
  background: var(--bg-paper);
  color: var(--ink-secondary);
  border-radius: 2px;
  cursor: pointer;
}

.lux-rule-btn[aria-pressed="true"] {
  background: var(--accent-verdigris);
  color: #FFFDF9;
  border-color: var(--accent-verdigris);
  font-weight: 600;
}

/* Mini Contact Sheet Grids Inside Margin Plates (Fig. 11 - Fig. 15) */
.plate-contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.35rem;
  margin: 0.5rem 0 0.65rem;
}

.plate-contact-grid--2x2 {
  grid-template-columns: repeat(2, 1fr);
}

.plate-thumb-btn {
  padding: 0;
  border: 1px solid var(--rule-strong);
  border-radius: 2px;
  overflow: hidden;
  background: #141311;
  cursor: zoom-in;
  position: relative;
  aspect-ratio: 4 / 3;
  transition: transform 0.15s ease, border-color 0.15s ease;
}

.plate-thumb-btn:hover {
  border-color: var(--accent-vermilion);
  transform: scale(1.03);
  z-index: 2;
}

.plate-thumb-btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   7. Complete Archival Index Ledger Table (1997–2026)
   ========================================================================== */
.ledger-section {
  margin-top: 2rem;
  padding-top: 2.5rem;
  border-top: 2px solid var(--ink-primary);
  content-visibility: auto;
  contain-intrinsic-size: 900px;
}

.ledger-header {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.ledger-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

.ledger-filter-btn {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.3rem 0.6rem;
  background: var(--bg-well);
  border: 1px solid var(--rule-strong);
  color: var(--ink-secondary);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
}

.ledger-filter-btn[aria-pressed="true"] {
  background: var(--ink-primary);
  color: var(--bg-paper);
  border-color: var(--ink-primary);
  font-weight: 600;
}

.ledger-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  background: var(--bg-elevated);
  box-shadow: var(--shadow-plate);
}

.ledger-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.94rem;
}

.ledger-table th {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-caption);
  background: var(--bg-well);
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--rule-strong);
  white-space: nowrap;
}

.ledger-table td {
  padding: 0.75rem 0.9rem;
  border-bottom: 1px solid var(--rule-hairline);
  vertical-align: top;
  line-height: 1.45;
}

.ledger-table tr:last-child td {
  border-bottom: none;
}

.ledger-table tbody tr:hover {
  background: var(--bg-well);
}

.ledger-year {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent-vermilion);
  white-space: nowrap;
  font-weight: 500;
}

.ledger-fig {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-muted);
  white-space: nowrap;
}

.ledger-title {
  font-weight: 600;
  color: var(--ink-primary);
}

.ledger-substrate {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--ink-caption);
}

.ledger-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* ==========================================================================
   8. Native <dialog> Modals (Patch Notebook Folio & Salvaged Specimen Lightbox)
   ========================================================================== */
.monograph-dialog {
  max-width: min(920px, 94vw);
  width: 100%;
  max-height: 88vh;
  margin: auto;
  padding: 0;
  background: var(--bg-paper);
  color: var(--ink-primary);
  border: 1px solid var(--rule-strong);
  border-top: 4px solid var(--accent-vermilion);
  border-radius: 5px;
  box-shadow: var(--shadow-modal);
  overflow: hidden;
}

.monograph-dialog[open] {
  display: flex;
  flex-direction: column;
}

.monograph-dialog::backdrop {
  background: rgba(15, 14, 12, 0.72);
  backdrop-filter: blur(4px);
}

.monograph-dialog.supports-discrete {
  opacity: 0;
  transform: translateY(10px) scale(0.985);
  transition:
    opacity 0.22s ease,
    transform 0.22s ease,
    overlay 0.22s ease allow-discrete,
    display 0.22s ease allow-discrete;
}

.monograph-dialog.supports-discrete[open] {
  opacity: 1;
  transform: translateY(0) scale(1);
}

@starting-style {
  .monograph-dialog.supports-discrete[open] {
    opacity: 0;
    transform: translateY(10px) scale(0.985);
  }
}

.dialog-head {
  padding: 1rem 1.35rem;
  background: var(--bg-well);
  border-bottom: 1px solid var(--rule-hairline);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.dialog-kicker {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent-vermilion);
  display: block;
  margin-bottom: 0.2rem;
}

.dialog-title {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  font-weight: 600;
  margin: 0;
}

.dialog-content {
  padding: 1.35rem;
  overflow-y: auto;
  font-size: 1rem;
  line-height: 1.6;
}

.dialog-foot {
  padding: 0.75rem 1.35rem;
  background: var(--bg-well);
  border-top: 1px solid var(--rule-hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--ink-caption);
}

/* Patch Notebook Folio Grid inside Dialog */
.patch-folio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(245px, 1fr));
  gap: 0.85rem;
  margin-top: 0.9rem;
}

.patch-card {
  background: var(--bg-well);
  border: 1px solid var(--rule-hairline);
  border-left: 3px solid var(--accent-verdigris);
  border-radius: 3px;
  padding: 0.75rem 0.85rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 0.5rem;
}

.patch-card__meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
}

.patch-card__title {
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  margin: 0;
}

.patch-card__desc {
  font-size: 0.86rem;
  color: var(--ink-caption);
  margin: 0;
  line-height: 1.45;
}

/* Lightbox Specimen Gallery Inside Dialog */
.lightbox-stage {
  background: #121110;
  border: 1px solid var(--rule-strong);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: 1rem;
}

.lightbox-stage img {
  max-height: 52vh;
  width: auto;
  margin: 0 auto;
  object-fit: contain;
}

.lightbox-thumbs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 0.5rem;
  margin-top: 0.85rem;
}

.lightbox-thumb {
  border: 2px solid transparent;
  border-radius: 3px;
  overflow: hidden;
  padding: 0;
  background: #141311;
  cursor: pointer;
  aspect-ratio: 4 / 3;
}

.lightbox-thumb[aria-current="true"] {
  border-color: var(--accent-vermilion);
}

.lightbox-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ==========================================================================
   9. Footer Colophon & Responsive Breakpoints
   ========================================================================== */
.monograph-colophon {
  margin-top: 4rem;
  padding-top: 2rem;
  border-top: 1px solid var(--rule-strong);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  font-size: 0.95rem;
  color: var(--ink-caption);
}

@media (max-width: 980px) {
  .tufte-grid {
    grid-template-columns: 1fr;
    row-gap: 0.5rem;
  }

  .chapter-header,
  .prose-cell,
  .margin-cell {
    grid-column: 1 / -1;
  }

  .specimen-plate::before {
    display: none;
  }

  .margin-cell {
    margin: 0.35rem 0 1.85rem;
  }

  .monograph-bar__chapters {
    display: none;
  }
}