/* ============================================================
   Canvas viewport & stage
   The viewport is fixed full-screen; the stage is an absolute
   div moved by CSS transform (GPU-accelerated, no scrollbars).
   ============================================================ */

:root {
  --c-canvas:           #171612;
  --c-surface-panel:    rgba(22, 21, 18, 0.72);
  --c-border-muted:     rgba(240, 235, 227, 0.12);
  --c-border-strong:    rgba(240, 235, 227, 0.22);
  --c-text-canvas:      #f0ebe3;
  --c-text-muted:       #857c73;
  --c-accent:           #c4a882;
  --c-accent-hover:     #d4bc9a;
  --radius-md:          8px;
  --radius-lg:          12px;
  --motion-base:        0.35s ease;
  --motion-fast:        0.15s ease-out;

  /* Nav height — used to offset canvas viewport */
  --nav-h: 52px;
}

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

html,
body {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  overscroll-behavior: none; /* prevent iOS rubber-band fighting the canvas */
  background: var(--c-canvas);
  color: var(--c-text-canvas);
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
}

body {
  cursor: grab;
}

body.is-panning {
  cursor: grabbing;
  user-select: none;
}

body.is-panning .canvas-card {
  pointer-events: none;
}

/* ============================================================
   Top navigation bar
   ============================================================ */

#canvas-nav {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--nav-h);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  background: linear-gradient(to bottom, rgba(23, 22, 18, 0.86), rgba(23, 22, 18, 0.56) 72%, transparent);
  border-bottom: 0;
  backdrop-filter: blur(8px);
}

#canvas-nav-logo {
  text-decoration: none;
  color: var(--c-text-canvas);
  font-family: "Cormorant Garamond", "Georgia", serif;
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  opacity: 0.9;
  transition: opacity var(--motion-fast);
  cursor: pointer;
}

#canvas-nav-logo:hover {
  opacity: 1;
}

.nav-logo-img {
  display: block;
  height: 28px;
  width: auto;
}

#canvas-nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

#canvas-nav-links a {
  display: block;
  padding: 0.35rem 0.75rem;
  color: var(--c-text-muted);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: none;
  border-radius: 999px;
  transition: color var(--motion-fast), background var(--motion-fast);
}

#canvas-nav-links a:hover {
  color: var(--c-text-canvas);
  background: rgba(240, 235, 227, 0.06);
}

/* ============================================================
   Canvas viewport & stage
   ============================================================ */

#canvas-viewport {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  /* overflow intentionally absent — transform drives panning */
  touch-action: none; /* hand all touch events to JS; prevents browser scroll takeover */
  background:
    radial-gradient(circle at 22% 18%, rgba(191, 165, 127, 0.08), transparent 24%),
    radial-gradient(circle at 72% 38%, rgba(124, 155, 184, 0.045), transparent 28%),
    linear-gradient(180deg, #191812 0%, #14130f 100%);
}

#canvas-viewport::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.34;
  background-image:
    radial-gradient(rgba(240, 235, 227, 0.16) 0.6px, transparent 0.8px),
    linear-gradient(90deg, rgba(240, 235, 227, 0.03) 1px, transparent 1px),
    linear-gradient(rgba(240, 235, 227, 0.025) 1px, transparent 1px);
  background-size: 13px 13px, 92px 92px, 92px 92px;
  mask-image: radial-gradient(ellipse at 50% 46%, #000 0%, #000 58%, transparent 100%);
}

#canvas-stage {
  position: absolute;
  top: 0;
  left: 0;
  will-change: transform;
  transform-origin: top left;
  z-index: 1;
}

#canvas-connectors {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: visible;
  pointer-events: none;
}

.canvas-connector {
  stroke: rgba(196, 168, 130, 0.42);
  stroke-width: 1.25;
  stroke-linecap: round;
  stroke-dasharray: 3 9;
  filter: drop-shadow(0 0 8px rgba(196, 168, 130, 0.22));
}

.canvas-connector--sequence {
  stroke: rgba(196, 168, 130, 0.5);
  stroke-width: 1.5;
  stroke-dasharray: none;
}

.canvas-connector--cause,
.canvas-connector--supports {
  stroke: rgba(141, 177, 153, 0.52);
  stroke-dasharray: none;
}

.canvas-connector--contrast {
  stroke: rgba(213, 112, 87, 0.5);
  stroke-dasharray: 10 8;
}

.canvas-connector--echo,
.canvas-connector--motif {
  stroke: rgba(124, 155, 184, 0.48);
  stroke-dasharray: 2 10;
}

.canvas-connector--unresolved {
  stroke: rgba(213, 112, 87, 0.55);
  stroke-dasharray: 4 8 14 8;
}

.canvas-connector--transforms {
  stroke: rgba(196, 168, 130, 0.72);
  stroke-width: 2.5;
  stroke-dasharray: none;
}

/* ============================================================
   Card on canvas
   ============================================================ */

.canvas-card {
  position: absolute;
  transform: rotate(var(--card-rotate, 0deg));
  transform-origin: center center;
  container-type: inline-size;
  content-visibility: auto;
  contain-intrinsic-size: 320px 420px;

  /* Fog reveal: starts invisible, emerges as viewport pans near */
  opacity: 0;
  translate: 0 14px;
  transition:
    opacity 0.6s ease,
    translate 0.6s ease,
    transform var(--motion-base),
    box-shadow var(--motion-base);
}

.canvas-card.is-visible {
  opacity: var(--fog, 1); /* --fog is set by JS after pan settles; defaults to 1 on first reveal */
  translate: 0 0;
}

.canvas-card.card--interactive:hover,
.canvas-card.card--interactive:focus-within,
.canvas-card.card--interactive.is-shape-expanded {
  z-index: 20;
  transform: rotate(var(--card-rotate, 0deg)) translateY(-3px);
  content-visibility: visible;
}

/* ============================================================
   UI Chrome
   ============================================================ */

/* Minimap — bottom-right overview */
#canvas-minimap {
  position: fixed;
  bottom: 1.4rem;
  right: 1.6rem;
  z-index: 200;
  width: 148px;
  height: 88px;
  background: rgba(18, 17, 14, 0.78);
  border: 1px solid var(--c-border-muted);
  border-radius: var(--radius-md);
  overflow: hidden;
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
}

#canvas-minimap .mm-card {
  position: absolute;
  background: rgba(196, 168, 130, 0.4);
  border-radius: 2px;
}

#canvas-minimap-viewport {
  position: absolute;
  border: 1.5px solid var(--c-accent);
  border-radius: 3px;
  pointer-events: none;
  transition: left 0.1s linear, top 0.1s linear, width 0.1s linear, height 0.1s linear;
}

/* First-visit pan hint */
#pan-hint {
  position: fixed;
  inset: var(--nav-h) 0 0 0;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  z-index: 100;
  color: var(--c-text-muted);
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  animation: bwc-fade-hint 3.5s ease forwards;
}

@keyframes bwc-fade-hint {
  0%, 50% { opacity: 1; }
  100%     { opacity: 0; }
}

body.has-visited #pan-hint {
  display: none;
}

/* ============================================================
   Typography baseline
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: "Cormorant Garamond", "Georgia", serif;
  letter-spacing: 0.01em;
}

p {
  margin: 0;
}

/* ============================================================
   Hamburger toggle button — visible on mobile only
   ============================================================ */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.4rem;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-text-canvas);
  border-radius: 2px;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

/* Animate bars → ✕ when nav is open */
#canvas-nav.nav-open .nav-toggle span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
#canvas-nav.nav-open .nav-toggle span:nth-child(2) {
  opacity: 0;
}
#canvas-nav.nav-open .nav-toggle span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
   Responsive: mobile — canvas panning kept, touch-friendly
   ============================================================ */

@media (max-width: 640px) {
  /* Show hamburger, keep canvas intact */
  .nav-toggle {
    display: flex;
  }

  /* Nav links: hidden by default, revealed when .nav-open is on #canvas-nav */
  #canvas-nav-links {
    display: none;
    position: absolute;
    top: var(--nav-h);
    inset-inline: 0;
    flex-direction: column;
    background: var(--c-canvas);
    border-bottom: 1px solid var(--c-border-muted);
    padding: 0.5rem 1.75rem 1rem;
    z-index: 400;
    gap: 0;
  }

  #canvas-nav.nav-open #canvas-nav-links {
    display: flex;
  }

  #canvas-nav-links a {
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--c-border-muted);
    border-radius: 0;
    font-size: 0.88rem;
  }

  #canvas-nav-links li:last-child a {
    border-bottom: 0;
  }

  /* Minimap too small to use on touch */
  #canvas-minimap {
    display: none;
  }
}

/* ============================================================
   Prefers-reduced-motion
   ============================================================ */

@media (prefers-reduced-motion: reduce) {
  .canvas-card {
    transition: opacity 0.1s ease !important;
    translate: 0 0 !important;
  }
}

/* ============================================================
   Spatial canvas state machine: focus, related cards, paths
   ============================================================ */

body.card-focused .canvas-card:not(.is-focused):not(.is-related),
body.path-active .canvas-card:not(.is-path-card),
body.motif-active .canvas-card:not(.is-motif-match) {
  opacity: 0.24 !important;
  filter: saturate(0.55) blur(1px);
}

.canvas-card.is-related {
  opacity: 0.62 !important;
  filter: saturate(0.82);
}

.canvas-card.is-focused,
.canvas-card.is-path-current {
  z-index: 180 !important;
  opacity: 1 !important;
  filter: none;
  transform: rotate(calc(var(--card-rotate, 0deg) * 0.18)) translateY(-10px) scale(1.035) !important;
  content-visibility: visible;
  box-shadow: 0 34px 95px rgba(0, 0, 0, 0.72);
}

.canvas-card.is-path-card:not(.is-path-current) {
  opacity: 0.78 !important;
  filter: saturate(0.86);
}

.canvas-card.is-motif-match {
  opacity: 1 !important;
  filter: none;
  box-shadow:
    0 24px 78px rgba(0, 0, 0, 0.58),
    0 0 0 1px rgba(124, 155, 184, 0.34);
}

.card-focus-actions {
  position: absolute;
  right: 0.72rem;
  bottom: 0.72rem;
  z-index: 12;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  opacity: 0;
  transform: translateY(6px);
  pointer-events: none;
  transition: opacity 0.18s ease, transform 0.18s ease;
}

.canvas-card.is-focused .card-focus-actions {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.card-focus-actions button {
  border: 1px solid rgba(240, 235, 227, 0.22);
  border-radius: 999px;
  background: rgba(22, 21, 18, 0.78);
  color: var(--c-text-canvas);
  min-height: 34px;
  padding: 0 0.9rem;
  font-size: 0.78rem;
  font-weight: 600;
  cursor: pointer;
  backdrop-filter: blur(8px);
}

.card-focus-actions span {
  color: rgba(240, 235, 227, 0.62);
  font-size: 0.72rem;
}

#story-paths {
  position: fixed;
  left: 1.2rem;
  bottom: 1.2rem;
  z-index: 230;
  width: min(360px, calc(100vw - 2.4rem));
  color: var(--c-text-canvas);
  pointer-events: auto;
}

.story-paths__eyebrow {
  margin: 0 0 0.45rem;
  color: var(--c-text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.story-paths__list,
.story-paths__step {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.story-path,
.story-paths__step button {
  border: 1px solid rgba(240, 235, 227, 0.13);
  border-radius: 999px;
  background: rgba(22, 21, 18, 0.62);
  color: rgba(240, 235, 227, 0.78);
  min-height: 34px;
  padding: 0 0.72rem;
  font-size: 0.74rem;
  cursor: pointer;
  backdrop-filter: blur(10px);
}

.story-path {
  display: grid;
  max-width: min(100%, 21rem);
  min-height: 40px;
  border-radius: var(--radius-md);
  padding: 0.58rem 0.74rem;
  text-align: left;
}

.story-path span {
  font-weight: 700;
  line-height: 1.1;
}

.story-path small {
  display: block;
  max-width: 18rem;
  margin-top: 0.18rem;
  color: rgba(240, 235, 227, 0.54);
  font-size: 0.66rem;
  line-height: 1.25;
}

.story-path.is-active,
.story-path:hover,
.story-paths__step button:hover {
  border-color: rgba(196, 168, 130, 0.48);
  color: var(--c-text-canvas);
  background: rgba(38, 34, 27, 0.78);
}

.story-paths__step {
  align-items: stretch;
  margin-top: 0.55rem;
  padding: 0.62rem;
  border: 1px solid rgba(240, 235, 227, 0.12);
  border-radius: var(--radius-md);
  background: rgba(17, 16, 13, 0.7);
  backdrop-filter: blur(14px);
}

.story-paths__step[hidden] {
  display: none;
}

.story-paths__context {
  flex: 1 1 100%;
  min-width: 0;
}

.story-paths__context strong,
.story-paths__context span {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.story-paths__context strong {
  font: 700 0.82rem/1.15 Inter, system-ui, sans-serif;
}

.story-paths__context span {
  margin-top: 0.16rem;
  color: var(--c-text-muted);
  font: 600 1.02rem/1.12 "Cormorant Garamond", Georgia, serif;
}

.story-paths__controls {
  display: flex;
  flex: 1 1 100%;
  align-items: center;
  gap: 0.4rem;
}

.story-paths__controls span {
  min-width: 3rem;
  text-align: center;
  color: var(--c-accent);
  font-size: 0.75rem;
}

#story-chapter-rail {
  position: fixed;
  top: calc(var(--nav-h) + 1.1rem);
  left: 1.15rem;
  z-index: 220;
  display: grid;
  gap: 0.35rem;
  width: min(230px, 24vw);
  pointer-events: auto;
}

#story-chapter-rail button,
#story-motif-filters button {
  border: 1px solid rgba(240, 235, 227, 0.12);
  border-radius: var(--radius-md);
  background: rgba(22, 21, 18, 0.58);
  color: rgba(240, 235, 227, 0.72);
  backdrop-filter: blur(10px);
  cursor: pointer;
}

#story-chapter-rail button {
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  align-items: center;
  min-height: 36px;
  padding: 0.32rem 0.5rem;
  text-align: left;
}

#story-chapter-rail span {
  color: var(--c-accent);
  font-size: 0.66rem;
  font-weight: 700;
}

#story-chapter-rail strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.75rem;
}

#story-motif-filters {
  position: fixed;
  right: 1.2rem;
  top: calc(var(--nav-h) + 1.1rem);
  z-index: 220;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.38rem;
  width: min(360px, 32vw);
  pointer-events: auto;
}

#story-motif-filters button {
  min-height: 31px;
  padding: 0 0.68rem;
  font-size: 0.7rem;
  text-transform: capitalize;
}

#story-chapter-rail button:hover,
#story-motif-filters button:hover,
#story-motif-filters button.is-active {
  border-color: rgba(196, 168, 130, 0.42);
  color: var(--c-text-canvas);
  background: rgba(38, 34, 27, 0.76);
}

.canvas-card[data-role="anchor"] {
  box-shadow:
    0 26px 82px rgba(0, 0, 0, 0.56),
    0 0 0 1px rgba(196, 168, 130, 0.18);
}

.canvas-card[data-role="transition"]::after,
.mobile-reel-card[data-role="transition"]::after {
  content: "";
  position: absolute;
  inset: 0.58rem;
  border: 1px dashed rgba(196, 168, 130, 0.25);
  border-radius: inherit;
  pointer-events: none;
}

.canvas-card[data-role="proof"] {
  --card-expand-inline: 1.32;
}

.canvas-card[data-role="quote"] {
  --card-expand-block: 1.22;
}

.canvas-card[data-role="cta"] .card-focus-actions button,
.mobile-reel-card[data-role="cta"] [data-mobile-reel-read] {
  border-color: rgba(196, 168, 130, 0.44);
  background: rgba(196, 168, 130, 0.18);
}

.canvas-card[data-tone="dark"],
.mobile-reel-card[data-tone="dark"] {
  border-color: rgba(240, 235, 227, 0.12);
}

.canvas-card[data-tone="accent"],
.mobile-reel-card[data-tone="accent"] {
  box-shadow:
    0 24px 74px rgba(0, 0, 0, 0.56),
    0 0 0 1px rgba(196, 168, 130, 0.2);
}

.canvas-card[data-beat-type="conflict"],
.canvas-card.card--conflict,
.mobile-reel-card[data-beat-type="conflict"],
.mobile-reel-card.card--conflict {
  border-color: rgba(213, 112, 87, 0.34);
  box-shadow:
    0 24px 84px rgba(0, 0, 0, 0.62),
    0 0 0 1px rgba(213, 112, 87, 0.22);
}

.canvas-card[data-beat-type="evidence"],
.canvas-card.card--evidence,
.mobile-reel-card[data-beat-type="evidence"],
.mobile-reel-card.card--evidence {
  border-style: solid;
  filter: contrast(0.98) saturate(0.9);
}

.canvas-card[data-beat-type="principle"],
.canvas-card.card--principle,
.mobile-reel-card[data-beat-type="principle"],
.mobile-reel-card.card--principle {
  border-color: rgba(141, 177, 153, 0.3);
  text-transform: none;
}

.canvas-card[data-beat-type="transformation"],
.canvas-card.card--transformation,
.mobile-reel-card[data-beat-type="transformation"],
.mobile-reel-card.card--transformation {
  border-color: rgba(196, 168, 130, 0.38);
}

/* ============================================================
   Reading mode additions
   ============================================================ */

.fsc-layout {
  gap: 1.25rem;
}

.fsc-main {
  flex-basis: clamp(320px, 660px, 64vw);
}

.fsc-related {
  flex: 0 0 min(250px, 20vw);
  max-height: 72vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.fsc-related[hidden] {
  display: none;
}

.fsc-related__eyebrow {
  margin: 0 0 0.15rem;
  color: var(--c-text-muted);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.fsc-related__item {
  text-align: left;
  border: 1px solid rgba(240, 235, 227, 0.12);
  border-radius: var(--radius-md);
  background: rgba(240, 235, 227, 0.055);
  color: var(--c-text-canvas);
  padding: 0.72rem 0.78rem;
  cursor: pointer;
}

.fsc-related__item span {
  display: block;
  margin-bottom: 0.2rem;
  color: var(--c-text-muted);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.fsc-related__item strong {
  display: block;
  font: 600 1rem/1.2 "Cormorant Garamond", Georgia, serif;
}

#card-fullscreen .is-reading-card h4 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.05;
}

#card-fullscreen .is-reading-card .lead,
#card-fullscreen .is-reading-card .snippet-body,
#card-fullscreen .is-reading-card p,
#card-fullscreen .is-reading-card li {
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.75;
}

@media (max-width: 820px) {
  .fsc-layout {
    flex-direction: column;
  }

  .fsc-related {
    flex: 0 0 auto;
    width: min(94vw, 480px);
    max-height: 120px;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
  }

  .fsc-related__eyebrow {
    display: none;
  }

  .fsc-related__item {
    min-width: 180px;
  }
}

#mobile-spatial-reel {
  display: none;
}

#mobile-map-exit {
  display: none;
}

@media (max-width: 760px) {
  html,
  body {
    height: auto;
    min-height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: auto;
  }

  body {
    cursor: auto;
    background:
      radial-gradient(circle at 20% 8%, rgba(196, 168, 130, 0.12), transparent 28%),
      #171612;
  }

  #canvas-viewport,
  #story-paths,
  #canvas-minimap,
  #story-chapter-rail,
  #story-motif-filters,
  #pan-hint {
    display: none;
  }

  body.mobile-canvas-mode {
    height: 100%;
    overflow: hidden;
    cursor: grab;
  }

  body.mobile-canvas-mode #canvas-viewport {
    display: block;
  }

  body.mobile-canvas-mode #mobile-map-exit {
    position: fixed;
    right: 1rem;
    bottom: calc(1rem + env(safe-area-inset-bottom));
    z-index: 260;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 42px;
    padding: 0 1rem;
    border: 1px solid rgba(240, 235, 227, 0.2);
    border-radius: 999px;
    background: rgba(22, 21, 18, 0.82);
    color: var(--c-text-canvas);
    font-size: 0.78rem;
    font-weight: 700;
    backdrop-filter: blur(12px);
    box-shadow: 0 14px 44px rgba(0, 0, 0, 0.45);
  }
}

/* ============================================================
   Mobile spatial reel: phone-first version of the canvas
   ============================================================ */

@media (max-width: 760px) {
  #mobile-spatial-reel {
    display: grid;
    height: 100dvh;
    grid-template-rows: auto auto auto minmax(0, 1fr) auto;
    padding: calc(var(--nav-h) + 0.85rem) 0 0.9rem;
    overflow: hidden;
    color: var(--c-text-canvas);
    background:
      radial-gradient(circle at 20% 12%, rgba(196, 168, 130, 0.13), transparent 24%),
      radial-gradient(circle at 78% 32%, rgba(124, 155, 184, 0.08), transparent 30%),
      linear-gradient(180deg, #191812 0%, #13120f 100%);
  }

  #mobile-spatial-reel::before {
    content: "";
    position: fixed;
    inset: var(--nav-h) 0 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.28;
    background-image:
      radial-gradient(rgba(240, 235, 227, 0.18) 0.6px, transparent 0.8px),
      linear-gradient(90deg, rgba(240, 235, 227, 0.035) 1px, transparent 1px),
      linear-gradient(rgba(240, 235, 227, 0.03) 1px, transparent 1px);
    background-size: 13px 13px, 84px 84px, 84px 84px;
    mask-image: radial-gradient(ellipse at 50% 48%, #000 0%, #000 58%, transparent 100%);
  }

  .mobile-reel__chrome,
  .mobile-reel__chapters,
  .mobile-reel__paths,
  .mobile-reel__path-step,
  .mobile-reel__viewport,
  .mobile-reel__footer {
    position: relative;
    z-index: 1;
  }

  .mobile-reel__chrome {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 1rem;
    padding: 0 1rem 0.7rem;
  }

  .mobile-reel__eyebrow {
    margin: 0 0 0.16rem;
    color: var(--c-accent);
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
  }

  .mobile-reel__chapter {
    margin: 0;
    color: var(--c-text-canvas);
    font-size: clamp(1.55rem, 8vw, 2.35rem);
    line-height: 0.95;
  }

  .mobile-reel__map-toggle,
  .mobile-reel__chapters button,
  .mobile-reel__paths button,
  .mobile-reel__path-step button {
    border: 1px solid rgba(240, 235, 227, 0.15);
    border-radius: 999px;
    background: rgba(22, 21, 18, 0.62);
    color: rgba(240, 235, 227, 0.78);
    min-height: 36px;
    padding: 0 0.78rem;
    font-size: 0.76rem;
    font-weight: 600;
    backdrop-filter: blur(12px);
  }

  .mobile-reel__map-toggle {
    min-width: 58px;
    color: var(--c-text-canvas);
    background: rgba(240, 235, 227, 0.08);
  }

  .mobile-reel__chapters,
  .mobile-reel__paths {
    display: flex;
    gap: 0.42rem;
    overflow-x: auto;
    overscroll-behavior-x: contain;
    scrollbar-width: none;
    padding: 0.25rem 1rem;
  }

  .mobile-reel__chapters::-webkit-scrollbar,
  .mobile-reel__paths::-webkit-scrollbar,
  .mobile-reel__track::-webkit-scrollbar,
  .mobile-reel__related::-webkit-scrollbar {
    display: none;
  }

  .mobile-reel__chapters button,
  .mobile-reel__paths button {
    flex: 0 0 auto;
  }

  .mobile-reel__chapters button.is-active,
  .mobile-reel__paths button.is-active {
    border-color: rgba(196, 168, 130, 0.52);
    color: var(--c-text-canvas);
    background: rgba(48, 42, 32, 0.78);
  }

  .mobile-reel__path-step {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto auto auto auto;
    align-items: center;
    gap: 0.45rem;
    min-height: 42px;
    padding: 0.25rem 1rem 0;
  }

  .mobile-reel__path-step[hidden] {
    display: none;
  }

  .mobile-reel__path-step div {
    min-width: 0;
  }

  .mobile-reel__path-step strong,
  .mobile-reel__path-step div span {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .mobile-reel__path-step strong {
    color: var(--c-text-canvas);
    font-size: 0.72rem;
    line-height: 1.1;
  }

  .mobile-reel__path-step div span {
    margin-top: 0.12rem;
    color: var(--c-text-muted);
    font: 600 0.92rem/1.05 "Cormorant Garamond", Georgia, serif;
  }

  .mobile-reel__path-step > span {
    min-width: 3rem;
    color: var(--c-accent);
    text-align: center;
    font-size: 0.78rem;
  }

  .mobile-reel__viewport {
    min-height: 0;
    display: flex;
    align-items: center;
    padding: 0.15rem 0 0.25rem;
  }

  .mobile-reel__track {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 0;
    overflow-x: auto;
    overflow-y: visible;
    scroll-snap-type: x mandatory;
    scroll-padding-inline: 12vw;
    padding: 1.05rem 12vw 1.2rem;
    overscroll-behavior-x: contain;
    -webkit-overflow-scrolling: touch;
  }

  .mobile-reel-card {
    flex: 0 0 76vw;
    width: 76vw;
    max-width: 360px;
    min-height: min(50dvh, 500px);
    height: min(50dvh, 500px);
    margin-inline: -1.5vw;
    scroll-snap-align: center;
    position: relative;
    transform: translateY(12px) scale(0.82) rotate(var(--mobile-reel-rotate, -1.2deg));
    opacity: 0.34;
    filter: blur(1px) saturate(0.62);
    transition:
      transform 360ms cubic-bezier(0.2, 0.8, 0.2, 1),
      opacity 220ms ease,
      filter 220ms ease,
      box-shadow 260ms ease;
    content-visibility: visible;
    overflow: hidden;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.44);
  }

  .mobile-reel-card:nth-child(3n+1) { --mobile-reel-rotate: -1.4deg; }
  .mobile-reel-card:nth-child(3n+2) { --mobile-reel-rotate: 0.8deg; }
  .mobile-reel-card:nth-child(3n) { --mobile-reel-rotate: -0.4deg; }

  .mobile-reel-card.is-prev,
  .mobile-reel-card.is-next {
    opacity: 0.58;
    filter: blur(0.5px) saturate(0.78);
    transform: translateY(6px) scale(0.9) rotate(var(--mobile-reel-rotate, -1deg));
  }

  .mobile-reel-card.is-active {
    z-index: 5;
    opacity: 1;
    filter: none;
    transform: translateY(0) scale(1) rotate(0deg);
    box-shadow: 0 28px 90px rgba(0, 0, 0, 0.68);
  }

  .mobile-reel-card.is-far {
    opacity: 0.18;
  }

  .mobile-reel-card.is-reel-focused {
    min-height: min(58dvh, 580px);
    height: min(58dvh, 580px);
    overflow-y: auto;
    overscroll-behavior: contain;
  }

  .mobile-reel-card.is-active .lead,
  .mobile-reel-card.is-active .snippet-body,
  .mobile-reel-card.is-active p,
  .mobile-reel-card.is-active li {
    font-size: clamp(0.9rem, 3.7vw, 1rem);
    line-height: 1.48;
  }

  .mobile-reel-card.is-active h4,
  .mobile-reel-card.is-active .audio-card__title,
  .mobile-reel-card.is-active .newsletter-card__heading,
  .mobile-reel-card.is-active .bio-card__name {
    overflow-wrap: anywhere;
    hyphens: auto;
    line-height: 1.02;
  }

  .mobile-reel-card.is-reel-path {
    outline: 1px solid rgba(196, 168, 130, 0.32);
    outline-offset: 5px;
  }

  .mobile-reel-card.is-reel-path-current {
    outline-color: rgba(196, 168, 130, 0.78);
    box-shadow:
      0 28px 90px rgba(0, 0, 0, 0.68),
      0 0 0 1px rgba(196, 168, 130, 0.25),
      0 0 34px rgba(196, 168, 130, 0.16);
  }

  .mobile-reel-card .card__content,
  .mobile-reel-card .audio-card,
  .mobile-reel-card .bio-card,
  .mobile-reel-card .newsletter-card,
  .mobile-reel-card .status-card {
    min-height: 100%;
  }

  .mobile-reel-card:not(.is-active) .lead,
  .mobile-reel-card:not(.is-active) details,
  .mobile-reel-card:not(.is-active) .snippet-body,
  .mobile-reel-card:not(.is-active) .card__bottom,
  .mobile-reel-card:not(.is-active) .card-foldout,
  .mobile-reel-card:not(.is-active) .mobile-reel-card__actions {
    display: none !important;
  }

  .mobile-reel-card.is-reel-focused .snippet-body {
    max-height: none;
    overflow: visible;
  }

  .mobile-reel-card__actions {
    position: absolute;
    left: 0.85rem;
    right: 0.85rem;
    bottom: 0.85rem;
    z-index: 22;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.7rem;
  }

  .mobile-reel-card.is-reel-focused .mobile-reel-card__actions {
    position: sticky;
    bottom: 0.65rem;
    margin-top: 0.8rem;
  }

  .mobile-reel-card__actions button {
    border: 1px solid rgba(240, 235, 227, 0.24);
    border-radius: 999px;
    background: rgba(22, 21, 18, 0.82);
    color: var(--c-text-canvas);
    min-height: 42px;
    padding: 0 1rem;
    font-weight: 700;
    backdrop-filter: blur(10px);
  }

  .mobile-reel-card__actions span {
    color: rgba(240, 235, 227, 0.62);
    font-size: 0.74rem;
  }

  .mobile-reel__footer {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 5;
    display: grid;
    gap: 0.5rem;
    padding: 0.4rem 1rem calc(0.7rem + env(safe-area-inset-bottom));
    background: linear-gradient(to top, rgba(19, 18, 15, 0.9) 0%, rgba(19, 18, 15, 0.62) 66%, transparent 100%);
    pointer-events: auto;
  }

  .mobile-reel__progress {
    display: flex;
    justify-content: center;
    gap: 0.32rem;
    min-height: 18px;
  }

  .mobile-reel__dot {
    width: 5px;
    height: 5px;
    border: 0;
    border-radius: 999px;
    padding: 0;
    background: rgba(240, 235, 227, 0.26);
  }

  .mobile-reel__dot.is-active {
    width: 18px;
    background: var(--c-accent);
  }

  .mobile-reel__related {
    display: flex;
    gap: 0.5rem;
    overflow-x: auto;
    padding-bottom: 0.1rem;
  }

  .mobile-reel__related[hidden] {
    display: none;
  }

  .mobile-reel__related-item {
    flex: 0 0 min(58vw, 220px);
    text-align: left;
    border: 1px solid rgba(240, 235, 227, 0.12);
    border-radius: var(--radius-md);
    background: rgba(240, 235, 227, 0.06);
    color: var(--c-text-canvas);
    padding: 0.58rem 0.68rem;
  }

  .mobile-reel__related-item span {
    display: block;
    color: var(--c-text-muted);
    font-size: 0.62rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
  }

  .mobile-reel__related-item strong {
    display: block;
    margin-top: 0.2rem;
    font: 600 0.98rem/1.12 "Cormorant Garamond", Georgia, serif;
  }

  body.mobile-canvas-mode #mobile-spatial-reel {
    display: none;
  }
}

/* ============================================================
   Fog-of-war vignette (CSS layer, zero JS cost)
   Dark radial gradient fades the canvas edges, leaving a clear
   spotlight centred on the viewport.
   ============================================================ */

#canvas-viewport::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse 62% 62% at 50% 50%,
    transparent 0%,
    transparent 34%,
    rgba(26, 25, 23, 0.28) 68%,
    rgba(26, 25, 23, 0.62) 100%
  );
  pointer-events: none;
  z-index: 80;
}

/* ============================================================
   Zoomed-out mode: hide non-essential text when scale < 0.6
   ============================================================ */

body.canvas-zoomed-out .canvas-card .lead,
body.canvas-zoomed-out .canvas-card .card__bottom,
body.canvas-zoomed-out .canvas-card details,
body.canvas-zoomed-out .canvas-card .card-foldout,
body.canvas-zoomed-out .canvas-card .card-chip {
  display: none;
}

body.canvas-zoomed-out .canvas-card h4 {
  font-size: 0.85rem !important;
  line-height: 1.2;
}

/* ============================================================
   Fullscreen card overlay
   ============================================================ */

#card-fullscreen {
  position: fixed;
  inset: 0;
  z-index: 900;
  display: flex;
  align-items: stretch;
}

#card-fullscreen[hidden] { display: none; }

.fsc-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(22, 21, 18, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

/* Three-column layout: prev-peek | main | next-peek */
.fsc-layout {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  width: 100%;
  padding: 4rem 1rem 2rem;
  overflow: hidden;
}

.fsc-main {
  flex: 0 0 clamp(300px, 560px, 90vw);
  max-height: min(86vh, 820px);
  min-height: min(520px, 82vh);
  overflow-y: auto;
  overflow-x: hidden;
  border-radius: var(--radius-lg);
  position: relative;
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.7);
  scroll-behavior: smooth;
}

/* Peek strips: partially visible adjacent cards on desktop */
.fsc-peek {
  flex: 0 0 130px;
  height: clamp(300px, 66vh, 600px);
  overflow: hidden;
  border-radius: var(--radius-lg);
  opacity: 0.28;
  filter: blur(3px) saturate(0.6);
  transition: opacity 0.3s ease, filter 0.3s ease, transform 0.3s ease;
  cursor: pointer;
  transform: scale(0.93);
}

.fsc-peek:not(:empty):hover {
  opacity: 0.55;
  filter: blur(0) saturate(1);
  transform: scale(0.97);
}

@media (max-width: 820px) {
  .fsc-peek { display: none; }
  .fsc-main {
    flex: 0 0 min(94vw, 480px);
    height: 80vh;
  }
  .fsc-layout { padding: 3.5rem 0.5rem 1.5rem; }
}

/* Close button */
.fsc-close {
  position: fixed;
  top: 0.9rem;
  right: 1rem;
  z-index: 10;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(240, 235, 227, 0.2);
  background: rgba(26, 25, 23, 0.7);
  color: var(--c-text-canvas);
  font-size: 1.3rem;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--motion-fast), border-color var(--motion-fast);
}

.fsc-close:hover {
  background: rgba(240, 235, 227, 0.1);
  border-color: rgba(240, 235, 227, 0.4);
}

/* Prev/Next navigation arrows */
.fsc-nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 40px;
  height: 60px;
  border-radius: 8px;
  border: 1px solid rgba(240, 235, 227, 0.14);
  background: rgba(26, 25, 23, 0.55);
  color: var(--c-text-canvas);
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--motion-fast), opacity var(--motion-fast);
}

.fsc-nav:hover { background: rgba(240, 235, 227, 0.08); }
.fsc-nav:disabled { opacity: 0.18; cursor: default; pointer-events: none; }
.fsc-nav--prev { left: 0.4rem; }
.fsc-nav--next { right: 0.4rem; }

@media (max-width: 480px) {
  /* Arrows replaced by swipe on small phones */
  .fsc-nav { display: none; }
}

/* Card counter "3 / 18" */
.fsc-counter {
  position: fixed;
  bottom: 0.9rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-text-muted);
  pointer-events: none;
}

/* Swipe hint dot strip on mobile */
.fsc-dots {
  position: fixed;
  bottom: 0.9rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10;
  display: none;
  gap: 6px;
  align-items: center;
}

@media (max-width: 480px) {
  .fsc-counter { display: none; }
  .fsc-dots { display: flex; }
}

.fsc-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(240, 235, 227, 0.25);
  transition: background 0.2s ease, transform 0.2s ease;
}

.fsc-dot.is-active {
  background: var(--c-accent);
  transform: scale(1.35);
}

/* Cards inside fullscreen: strip canvas positioning & rotation */
#card-fullscreen .canvas-card {
  position: relative !important;
  transform: none !important;
  translate: none !important;
  left: auto !important;
  top: auto !important;
  width: 100% !important;
  height: auto !important;
  min-height: 100% !important;
  max-height: none !important;
  --card-rotate: 0deg !important;
  opacity: 1 !important;
  transition: none !important;
  border-radius: var(--radius-lg) !important;
  overflow: hidden !important;
}

#card-fullscreen .card__content,
#card-fullscreen .audio-card,
#card-fullscreen .bio-card,
#card-fullscreen .newsletter-card,
#card-fullscreen .status-card {
  overflow: visible !important;
}

#card-fullscreen details .snippet-body,
#card-fullscreen .snippet-body {
  max-height: none !important;
  overflow: visible !important;
}

/* Hide the canvas expand-btn inside fullscreen */
#card-fullscreen .card-expand-btn { display: none !important; }

/* Peek cards: no hover lift */
.fsc-peek .canvas-card {
  pointer-events: none;
  min-height: 100% !important;
}

/* Prevent canvas from receiving clicks while fullscreen is open */
body.fullscreen-open #canvas-viewport { pointer-events: none; }

/* ============================================================
   Drag-and-drop authoring (logged-in only)
   ============================================================ */

#bwc-drop-hint {
  position: absolute;
  inset: 0;
  z-index: 250;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.18s ease;
  background: rgba(26, 25, 23, 0.55);
  backdrop-filter: blur(2px);
}

body.bwc-dropping #bwc-drop-hint { opacity: 1; }
body.bwc-placement-mode #bwc-drop-hint {
  opacity: 1;
  background: rgba(26, 25, 23, 0.28);
}

body.bwc-placement-mode #bwc-drop-hint .bwc-drop-hint__inner {
  border-style: solid;
}

.bwc-drop-hint__inner {
  border: 2px dashed var(--c-accent);
  border-radius: var(--radius-md);
  padding: 1.4rem 2.4rem;
  color: var(--c-text-canvas);
  font-size: 1.05rem;
  letter-spacing: 0.04em;
  background: rgba(26, 25, 23, 0.7);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.bwc-drop-hint__icon { font-size: 1.5rem; color: var(--c-accent); }

.bwc-file-input {
  position: fixed;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.bwc-add-card-button {
  position: fixed;
  right: 1.4rem;
  bottom: 1.4rem;
  z-index: 260;
  width: 50px;
  height: 50px;
  border: 1px solid var(--c-border-strong);
  border-radius: 50%;
  background: rgba(238, 232, 223, 0.94);
  color: #171612;
  font-size: 1.45rem;
  line-height: 1;
  cursor: pointer;
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.5);
}

.bwc-add-card-button:hover,
.bwc-add-card-button:focus-visible {
  border-color: var(--c-accent);
  color: var(--c-accent);
  outline: none;
}

@media (hover: hover) and (pointer: fine) {
  .bwc-add-card-button {
    display: none;
  }
}

@media (max-width: 640px) {
  .bwc-add-card-button {
    bottom: 1rem;
    right: 1rem;
  }
}

/* Toasts */
#bwc-toasts {
  position: fixed;
  bottom: 1.2rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 950;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: center;
}

.bwc-toast {
  background: rgba(26, 25, 23, 0.94);
  border: 1px solid var(--c-border-strong);
  color: var(--c-text-canvas);
  font-size: 0.85rem;
  padding: 0.6rem 1rem;
  border-radius: var(--radius-md);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.5);
}

.bwc-toast.is-error { border-color: #b84040; color: #f0c9c9; }

/* Inline quick-edit panel */
.bwc-quick-edit {
  position: fixed;
  z-index: 960;
  width: 320px;
  max-height: calc(100dvh - 5rem);
  overflow-y: auto;
  background: #1f1d1b;
  border: 1px solid var(--c-border-strong);
  border-radius: var(--radius-md);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.6);
  padding: 0.9rem 1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  color: var(--c-text-canvas);
}

.bwc-qe-title {
  margin: 0 0 0.1rem;
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.bwc-quick-edit label {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--c-text-muted);
}

.bwc-quick-edit label span { color: var(--c-text-muted); opacity: 0.7; }

.bwc-quick-edit .bwc-qe-check {
  flex-direction: row;
  align-items: center;
  gap: 0.45rem;
  letter-spacing: 0;
}

.bwc-qe-check input {
  margin: 0;
}

.bwc-qe-field {
  background: rgba(240, 235, 227, 0.06);
  border: 1px solid var(--c-border-muted);
  border-radius: var(--radius-md);
  color: var(--c-text-canvas);
  font: inherit;
  font-size: 0.85rem;
  min-height: 40px;
  padding: 0.55rem 0.65rem;
  outline: none;
}

.bwc-qe-field:focus { border-color: var(--c-accent); }

.bwc-qe-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.bwc-qe-save {
  background: var(--c-accent);
  border: 0;
  border-radius: var(--radius-md);
  color: #1a1917;
  font-weight: 600;
  font-size: 0.8rem;
  min-height: 40px;
  padding: 0.55rem 1rem;
  cursor: pointer;
}

.bwc-qe-save:disabled { opacity: 0.6; cursor: default; }

.bwc-qe-close {
  background: none;
  border: 0;
  color: var(--c-text-muted);
  font-size: 0.78rem;
  cursor: pointer;
  margin-left: auto;
}

.bwc-qe-full {
  color: var(--c-text-muted);
  font-size: 0.72rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.bwc-qe-full:hover { color: var(--c-text-canvas); border-bottom-color: var(--c-border-strong); }

@media (max-width: 600px) {
  /* Quick-edit becomes a bottom sheet on phones */
  .bwc-quick-edit {
    left: 0 !important;
    right: 0;
    top: auto !important;
    bottom: 0;
    width: auto;
    max-height: min(86vh, 680px);
    overflow-y: auto;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    padding: 1rem 1rem calc(1rem + env(safe-area-inset-bottom));
  }

  .bwc-qe-actions {
    position: sticky;
    bottom: 0;
    padding-top: 0.5rem;
    background: linear-gradient(to top, #1f1d1b 76%, rgba(31, 29, 27, 0));
  }
}

/* Final cascade overrides for the stateful reader. */
.fsc-main {
  flex-basis: clamp(320px, 660px, 64vw);
}

.fsc-related {
  flex: 0 0 min(250px, 20vw);
}

@media (max-width: 820px) {
  .fsc-layout {
    flex-direction: column;
  }

  .fsc-related {
    flex: 0 0 auto;
    width: min(94vw, 480px);
    max-height: 120px;
    flex-direction: row;
    overflow-x: auto;
    overflow-y: hidden;
  }
}

@media (max-width: 760px) {
  #canvas-viewport,
  #story-paths,
  #canvas-minimap,
  #story-chapter-rail,
  #story-motif-filters,
  #pan-hint {
    display: none;
  }

  body.mobile-canvas-mode #canvas-viewport {
    display: block;
  }
}

@media (max-width: 760px) {
  #mobile-spatial-reel {
    display: grid !important;
  }

  body.mobile-canvas-mode #mobile-spatial-reel {
    display: none !important;
  }

  body.mobile-canvas-mode #canvas-viewport {
    display: block !important;
  }
}