/* ============================================================
   The Diamond — style.css (v3)
   Single light theme. Off-white atmospheric background.
   Greyscale + gold + magenta resonance accents.
   ============================================================ */

:root {
  --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;

  /* φ tokens — exposed to CSS so any layout dimension that wants
     to echo the φ-shells can do so without duplicating decimals. */
  --phi:        1.6180339887;
  --phi-inv:    0.6180339887;
  --shell-1:    0.6180339887;
  --shell-2:    0.3819660113;
  --shell-3:    0.2360679775;

  --gold:        #b88813;
  --gold-bright: #d9a823;
  --gold-soft:   #8b6708;

  --magenta:     #d896d8;
  --magenta-soft: #b870b8;

  --radius:      4px;
  --gutter:      clamp(16px, 4vw, 40px);
  --max-width:   1080px;
  --transition:  220ms cubic-bezier(.25,.8,.25,1);

  /* light theme — the only theme. */
  --bg:          #ffffff;   /* full white for maximum contrast against the model */
  --bg-2:        #f6f3eb;
  --ink:         #1c1e22;
  --ink-2:       #3f4248;
  --ink-3:       #6c7077;
  --ink-faint:   #b9b6ae;
  --rule:        #cbc7be;
  --hover-bg:    rgba(252, 250, 245, 0.96);
  --hover-bord:  rgba(40, 42, 46, 0.16);
  --chip-bg:     rgba(184, 136, 19, 0.16);
  --chip-ink:    #8b6708;
  --link:        #1c1e22;
  --link-hover:  #8b6708;
  --flash:       rgba(216, 150, 216, 0.18);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  letter-spacing: 0.005em;
}

body { transition: background var(--transition), color var(--transition); }

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-faint);
  transition: color var(--transition), border-color var(--transition);
}
a:hover { color: var(--link-hover); border-bottom-color: var(--link-hover); }

.page {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(28px, 5vw, 56px) var(--gutter) 64px;
}

/* ----- Header ----- */
.site-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 36px;
}
.site-title {
  font-size: clamp(34px, 4.5vw, 52px);
  font-weight: 300;
  letter-spacing: 0.005em;
  line-height: 1.05;
  margin: 0 0 6px 0;
}
.site-attribution {
  margin: 0;
  color: var(--ink-2);
  font-size: 14px;
  font-weight: 300;
  letter-spacing: 0.02em;
}
.site-attribution em {
  font-style: italic;
  color: var(--gold);
}

/* ----- Intro overlay (centered card with backdrop) -----
   Shown over the stage on first load so users meet the framing before
   touching the model. Backdrop blurs / dims the model behind. Re-openable
   from the info button in the stage HUD. */
.intro-overlay {
  position: absolute;
  inset: 0;
  z-index: 50;
  display: none;
  align-items: center;
  justify-content: center;
  pointer-events: none;
  opacity: 0;
  transition: opacity 240ms ease;
}
.intro-overlay.is-visible {
  display: flex;
  pointer-events: auto;
  opacity: 1;
}
.intro-overlay__backdrop {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.intro-overlay__card {
  position: relative;
  z-index: 1;
  width: min(560px, calc(100% - 48px));
  max-height: calc(100% - 48px);
  overflow: auto;
  padding: 36px 40px 32px;
  background: #ffffff;
  border: 1px solid var(--ink-faint);
  border-radius: var(--radius);
  box-shadow:
    0 1px 2px rgba(20, 22, 26, 0.04),
    0 24px 60px -20px rgba(20, 22, 26, 0.18);
}
.intro-overlay__close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--ink-3);
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  transition: var(--transition);
}
.intro-overlay__close:hover { color: var(--ink); background: rgba(0,0,0,0.04); }
.intro-overlay__title {
  margin: 0 0 4px;
  font-size: 28px;
  font-weight: 300;
  letter-spacing: -0.005em;
  color: var(--ink);
}
.intro-overlay__attribution {
  margin: 0 0 18px;
  font-size: 13px;
  color: var(--ink-3);
  font-style: italic;
}
.intro-overlay__body {
  font-size: 15.5px;
  font-weight: 300;
  line-height: 1.6;
  color: var(--ink-2);
  text-wrap: pretty;
}
.intro-overlay__body p { margin: 0 0 10px; }
.intro-overlay__body em { color: var(--ink); font-style: italic; }
.intro-overlay__body .gold-being {
  color: var(--gold);
  font-weight: 500;
  letter-spacing: 0.04em;
}
.intro-overlay__begin {
  margin-top: 18px;
  appearance: none;
  -webkit-appearance: none;
  background: var(--ink);
  color: #ffffff;
  border: none;
  padding: 10px 22px;
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
}
.intro-overlay__begin:hover { background: var(--gold); color: #ffffff; }

/* ----- Stage ----- */
.stage {
  position: relative;
  width: 100%;
  /* Stage fills the viewport below the header so the model is centered
     in whatever screen the user has on first paint. The header is short;
     subtract a generous estimate so this works without JS measurement. */
  height: calc(100vh - 180px);
  min-height: 520px;
  max-height: 900px;
  margin: 24px 0 16px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  overflow: hidden;
  /* Whiter stage — still a faint radial cool toward the edges so the
     model has a centre of attention, but much higher key than before. */
  background:
    radial-gradient(circle at 50% 50%, #ffffff 0%, #faf9f5 70%, #f3f0e7 100%);
}
@media (max-width: 720px) {
  .stage { height: calc(100vh - 150px); min-height: 420px; }
}
.stage.is-fullscreen {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  border: none;
  border-radius: 0;
  z-index: 1000;
  margin: 0;
}
body.stage-expanded { overflow: hidden; }

#scene {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

.label-layer {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 2;
}
.label-layer .tier-label {
  position: absolute;
  top: 0; left: 0;
  pointer-events: auto;
  font-size: 10.5px;
  font-weight: 400;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--ink);
  background: transparent;
  padding: 2px 6px;
  border-radius: 2px;
  cursor: pointer;
  user-select: none;
  white-space: nowrap;
  text-shadow: 0 0 8px var(--bg), 0 0 8px var(--bg), 0 0 4px var(--bg);
  transition: color 160ms, background 160ms;
  outline: none;
}
.label-layer .tier-label:hover,
.label-layer .tier-label:focus {
  color: var(--gold-soft);
  background: rgba(184,136,19,0.06);
}
.label-layer .axis-vertical { font-weight: 400; }
.label-layer .axis-affect   { color: var(--ink); font-weight: 300; }
.label-layer .axis-time     { color: var(--ink-2); font-weight: 300; font-style: italic; text-transform: lowercase; letter-spacing: 0.06em; }
.label-layer .being-label {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.label-layer .being-label:hover { color: var(--gold-soft); background: transparent; }

/* HUD */
.stage__hud {
  position: absolute;
  top: 12px;
  right: 12px;
  display: flex;
  gap: 6px;
  z-index: 3;
}
.hud-btn {
  appearance: none;
  width: 32px;
  height: 32px;
  border-radius: 4px;
  background: rgba(255,255,255,0.6);
  color: var(--ink-2);
  border: 1px solid var(--rule);
  cursor: pointer;
  font-size: 14px;
  transition: var(--transition);
}
.hud-btn:hover { color: var(--gold-soft); border-color: var(--ink-faint); }
.hud-btn.is-active {
  color: var(--gold);
  border-color: var(--gold);
  background: rgba(184, 136, 19, 0.06);
}

.stage__hint {
  position: absolute;
  bottom: 10px;
  left: 14px;
  font-size: 11px;
  font-weight: 300;
  color: var(--ink-3);
  margin: 0;
  letter-spacing: 0.08em;
  text-transform: lowercase;
  pointer-events: none;
  z-index: 2;
}

/* ----- Tooltip / hover box ----- */
.tooltip {
  position: absolute;
  width: 280px;
  max-width: calc(100% - 24px);
  padding: 14px 16px;
  background: var(--hover-bg);
  border: 1px solid var(--hover-bord);
  border-radius: 6px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.10);
  font-size: 12.5px;
  line-height: 1.5;
  color: var(--ink);
  opacity: 0;
  pointer-events: none;
  transform: translateY(2px);
  transition: opacity 180ms ease, transform 180ms ease;
  z-index: 4;
}
.tooltip.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.tip-name {
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gold-soft);
  margin-bottom: 6px;
}
.tip-blurb {
  color: var(--ink-2);
  margin-bottom: 12px;
  font-weight: 300;
}
.tip-sources-label {
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 6px;
}
.tip-sources {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.tip-source {
  appearance: none;
  background: transparent;
  color: var(--link);
  border: none;
  border-bottom: 1px solid var(--ink-faint);
  text-align: left;
  padding: 4px 0;
  font: inherit;
  font-size: 12px;
  font-weight: 400;
  cursor: pointer;
  transition: color 160ms, border-color 160ms;
}
.tip-source:hover { color: var(--gold-soft); border-bottom-color: var(--gold); }

/* ----- τ slider — beefy and centered, sized to its content -----
   Sits centered below the stage as a single composed control: glyph +
   thick track with a gold thumb + tiny readout. */
.tau-control {
  display: flex;
  align-items: center;
  gap: 14px;
  width: max-content;
  max-width: 100%;
  margin: 16px auto 40px;
  padding: 10px 18px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.tau-glyph {
  font-size: 22px;
  line-height: 1;
  color: var(--ink-2);
  width: 22px;
  text-align: center;
  flex: 0 0 auto;
  user-select: none;
}

.tau-slider {
  flex: 0 0 auto;
  width: 240px;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(
    to right,
    var(--ink-faint) 0%,
    var(--gold) 100%);
  outline: none;
  cursor: pointer;
}
.tau-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gold);
  border: 3px solid #ffffff;
  box-shadow:
    0 0 0 1px var(--ink-faint),
    0 2px 6px rgba(216, 168, 35, 0.45);
  cursor: grab;
  transition: transform 160ms;
}
.tau-slider::-webkit-slider-thumb:active { transform: scale(1.12); cursor: grabbing; }
.tau-slider::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--gold);
  border: 3px solid #ffffff;
  box-shadow:
    0 0 0 1px var(--ink-faint),
    0 2px 6px rgba(216, 168, 35, 0.45);
  cursor: grab;
}
.tau-value {
  font-size: 11px;
  font-variant-numeric: tabular-nums;
  color: var(--ink-3);
  min-width: 36px;
  text-align: right;
  letter-spacing: 0.04em;
}

@media (max-width: 720px) {
  .tau-control { gap: 10px; padding: 8px 14px; }
  .tau-slider { width: 180px; }
}

/* ----- Readings ----- */
.readings-section { margin-top: 0; }
.readings-heading {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 400;
  letter-spacing: 0.01em;
  margin: 0 0 6px;
}
.readings-sub {
  color: var(--ink-3);
  font-size: 14px;
  font-weight: 300;
  margin: 0 0 22px;
  max-width: 640px;
}

.reading-block {
  border-bottom: 1px solid var(--rule);
  padding: 14px 0;
}
.reading-block summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.005em;
  color: var(--ink);
  transition: color 160ms;
}
.reading-block summary::-webkit-details-marker { display: none; }
.reading-block summary::before {
  content: '+';
  display: inline-block;
  width: 16px;
  text-align: center;
  color: var(--ink-3);
  font-weight: 300;
  font-size: 16px;
  transition: transform 200ms ease, color 160ms;
}
.reading-block[open] summary::before { content: '−'; color: var(--gold); }
.reading-block summary:hover { color: var(--gold-soft); }

.reading-block.reading-begin { border-top: 1px solid var(--rule); padding-top: 18px; }

.reading-summary-title { flex: 1; }

.chip {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.10em;
  text-transform: lowercase;
  font-style: italic;
  background: var(--chip-bg);
  color: var(--chip-ink);
  padding: 2px 8px;
  border-radius: 999px;
}

.reading-body {
  padding: 12px 0 8px 26px;
  max-width: 720px;
  font-size: 15px;
  font-weight: 300;
  line-height: 1.7;
  color: var(--ink-2);
}
.reading-body p { margin: 0 0 12px; }
.reading-body em { color: var(--ink); font-style: italic; }
.reading-body strong { color: var(--ink); font-weight: 500; }

.reading-body ul.sources {
  list-style: none;
  padding: 8px 0 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.reading-body ul.sources li {
  font-size: 13.5px;
  color: var(--ink-2);
  padding: 8px 12px;
  border-left: 2px solid var(--ink-faint);
  background: transparent;
  transition: background 240ms, border-color 240ms;
}
.reading-body ul.sources li.is-flash {
  background: var(--flash);
  border-left-color: var(--magenta);
}
.reading-body .src-name {
  display: block;
  color: var(--ink);
  font-weight: 400;
  margin-bottom: 2px;
}

/* ----- Overlay reading (fullscreen) ----- */
.overlay-reading {
  position: absolute;
  inset: 0;
  background: rgba(245, 243, 235, 0.86);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 36px;
  z-index: 20;
}
.overlay-reading.is-visible { display: flex; }
.overlay-content {
  position: relative;
  max-width: 540px;
  width: 100%;
  background: var(--hover-bg);
  border: 1px solid var(--hover-bord);
  border-radius: 8px;
  padding: 28px 32px;
  font-size: 14px;
  color: var(--ink-2);
  box-shadow: 0 12px 40px rgba(0,0,0,0.18);
}
.overlay-close {
  position: absolute;
  top: 8px; right: 12px;
  background: transparent;
  color: var(--ink-3);
  border: none;
  font-size: 22px;
  cursor: pointer;
}
.overlay-source .src-name { color: var(--gold-soft); display: block; margin-bottom: 8px; font-weight: 500; }

/* ----- Footer ----- */
.site-foot {
  margin-top: 56px;
  padding-top: 22px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  font-weight: 300;
  color: var(--ink-3);
  letter-spacing: 0.02em;
  text-align: center;
}
.site-foot a {
  color: var(--ink-2);
  border-bottom: 1px solid var(--ink-faint);
}
.site-foot a:hover { color: var(--gold-soft); border-bottom-color: var(--gold); }

/* ----- Mobile tweaks ----- */
@media (max-width: 720px) {
  .site-head { flex-direction: row; align-items: flex-start; }
  .site-title { font-size: 32px; }
  .intro { font-size: 16px; }
  .label-layer .tier-label { font-size: 10.5px; padding: 2px 5px; }
  .reading-body { padding-left: 14px; font-size: 14px; }
  .reading-block summary { font-size: 14px; }
  .tooltip { width: 250px; font-size: 12px; }
}

/* keyboard focus */
:focus-visible {
  outline: 1px solid var(--gold);
  outline-offset: 3px;
}

/* reduce motion */
@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* ============================================================
   v3: tooltip variants, source-refs, bibliography,
   resonance marks, label pulse.
   ============================================================ */

/* ----- tooltip variants ----- */
.tip-pool-meta {
  font-size: 9.5px;
  font-weight: 300;
  letter-spacing: 0.08em;
  color: var(--ink-3);
  margin-left: 6px;
  text-transform: none;
}
.tooltip.is-glyph .tip-name-glyph {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: none;
  color: var(--gold-soft);
}
.tip-work {
  font-size: 11.5px;
  color: var(--ink-2);
  margin-bottom: 8px;
  font-weight: 300;
}
.tip-glyph-cta {
  margin-top: 6px;
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.06em;
  text-transform: lowercase;
  color: var(--gold);
  border-bottom: 1px solid var(--ink-faint);
  padding-bottom: 2px;
}

/* ----- inline source-refs in prose ----- */
.reading-body a.source-ref {
  color: var(--ink);
  border-bottom: 1px dotted var(--ink-faint);
  text-decoration: none;
  cursor: pointer;
  transition: color 160ms, border-color 160ms;
}
.reading-body a.source-ref em { color: inherit; }
.reading-body a.source-ref:hover {
  color: var(--gold-soft);
  border-bottom-color: var(--gold);
  border-bottom-style: solid;
}

/* ----- bibliography entries ----- */
.src-entry {
  padding: 14px 0 14px 0;
  border-bottom: 1px solid var(--ink-faint);
  transition: background 240ms, border-color 240ms;
}
.src-entry:last-child { border-bottom: none; }
.src-entry.is-flash {
  background: var(--flash);
  border-bottom-color: var(--magenta);
}
.src-entry .src-name {
  display: block;
  color: var(--ink);
  font-size: 14px;
  font-weight: 400;
  margin-bottom: 4px;
  letter-spacing: 0.005em;
}
.src-entry .src-name em { color: var(--ink); font-style: italic; }
.src-entry .src-year {
  color: var(--ink-3);
  font-weight: 300;
  font-size: 12.5px;
  margin-left: 4px;
}
.src-entry .src-gloss {
  color: var(--ink-2);
  font-size: 13px;
  font-weight: 300;
  margin-bottom: 6px;
  line-height: 1.55;
}
.src-entry .src-excerpt {
  color: var(--ink-3);
  font-size: 12.5px;
  font-style: italic;
  font-weight: 300;
  margin-bottom: 6px;
  padding-left: 10px;
  border-left: 1px solid var(--ink-faint);
  line-height: 1.55;
}
.src-entry .src-ref {
  color: var(--ink-3);
  font-size: 11.5px;
  font-weight: 300;
  letter-spacing: 0.01em;
}

/* ----- resonance mark — small magenta dot next to source title ----- */
.resonance-mark {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--magenta);
  margin-right: 8px;
  vertical-align: middle;
  box-shadow: 0 0 6px rgba(216, 150, 216, 0.5);
}

/* ----- label pulse ----- */
@keyframes label-pulse {
  0%   { color: var(--ink); text-shadow: 0 0 8px var(--bg), 0 0 8px var(--bg), 0 0 4px var(--bg); }
  35%  { color: var(--gold-bright); text-shadow: 0 0 12px var(--gold), 0 0 6px var(--gold), 0 0 3px var(--bg); }
  100% { color: var(--ink); text-shadow: 0 0 8px var(--bg), 0 0 8px var(--bg), 0 0 4px var(--bg); }
}
.label-layer .tier-label.is-pulse {
  animation: label-pulse 1.4s cubic-bezier(.25,.8,.25,1);
}