/* =========================================================================
   jonahtebaa.com/v10/ — THE DIVE
   Stylesheet for the UI overlay layer above the Three.js canvas.
   Brand lock: Tech-Thriller Oracle (Jonah brand).
   ========================================================================= */

@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;600;700;800;900&family=Inter:wght@300;400;500;600&family=Noto+Naskh+Arabic:wght@500;600;700&display=swap');

:root {
  --jb-bg-primary: #0a1a1f;
  --jb-bg-deep: #060f12;
  --jb-accent: #00e5d4;
  --jb-accent-rgb: 0, 229, 212;
  --jb-accent-orange: #f05a1a;
  --jb-accent-gold: #f5c76a;
  --jb-text-primary: #ffffff;
  --jb-text-secondary: #a0c4c0;
  --jb-text-muted: #5a8a84;
  --jb-glass-bg: rgba(0, 229, 212, 0.03);
  --jb-glass-border: rgba(0, 229, 212, 0.08);
  --jb-glass-hover-border: rgba(0, 229, 212, 0.18);
  --jb-font-display: 'Montserrat', sans-serif;
  --jb-font-body: 'Inter', sans-serif;
  --jb-font-arabic: 'Noto Naskh Arabic', serif;
  --jb-radius-lg: 16px;
  --jb-radius-sm: 6px;
  --jb-ease: cubic-bezier(0.16, 1, 0.3, 1);
  --jb-ease-reveal: cubic-bezier(0.22, 1, 0.36, 1);
  --jb-shadow-glow: 0 0 20px rgba(0, 229, 212, 0.15);
  --jb-shadow-glow-strong: 0 0 60px rgba(0, 229, 212, 0.35);
  --jb-shadow-glow-warm: 0 0 40px rgba(240, 90, 26, 0.25);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body { width: 100%; height: 100%; overflow: hidden; background: var(--jb-bg-deep); color: var(--jb-text-primary); font-family: var(--jb-font-body); -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; color: inherit; background: none; border: none; cursor: pointer; }
canvas { display: block; }
img { max-width: 100%; display: block; }

/* Screen reader only */
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

/* ---------- Canvas ---------- */
#dive {
  position: fixed; inset: 0; width: 100vw; height: 100vh;
  background: radial-gradient(ellipse at center, #0a1a1f 0%, #060f12 80%);
  z-index: 1;
}

/* ---------- UI Layer ---------- */
#ui-layer {
  position: fixed; inset: 0; pointer-events: none; z-index: 10;
  font-family: var(--jb-font-body);
}
/* Only re-enable pointer events on UI chrome + the currently visible card.
   Invisible (opacity:0) layer-cards must NOT intercept clicks on #dive-start-btn,
   #surface-btn, #brian-speak-btn, etc. */
#ui-layer > *:not(.layer-card) { pointer-events: auto; }
.layer-card.visible { pointer-events: auto; }
.jonah-portrait, .jonah-caption { pointer-events: none; }

/* ---------- Loading Screen ---------- */
#loading {
  position: fixed; inset: 0; z-index: 100;
  display: flex; align-items: center; justify-content: center; flex-direction: column;
  background: radial-gradient(ellipse at center, #0e2a30 0%, #060f12 70%);
  transition: opacity 800ms var(--jb-ease);
}
#loading.hidden { opacity: 0; pointer-events: none; }
.loading-caustic {
  position: absolute; inset: 0; opacity: 0.22; mix-blend-mode: screen;
  background: radial-gradient(circle at 30% 40%, rgba(0,229,212,0.5) 0%, transparent 35%),
              radial-gradient(circle at 70% 60%, rgba(0,229,212,0.35) 0%, transparent 40%),
              radial-gradient(circle at 50% 20%, rgba(189,234,228,0.25) 0%, transparent 30%);
  animation: causticShift 8s ease-in-out infinite alternate;
}
@keyframes causticShift {
  0%   { transform: scale(1) translate(0,0); filter: hue-rotate(0deg); }
  100% { transform: scale(1.15) translate(-2%, -3%); filter: hue-rotate(-12deg); }
}
.loading-brand {
  font-family: var(--jb-font-display); font-weight: 900; font-size: 12px;
  letter-spacing: 0.6em; color: var(--jb-accent); text-transform: uppercase;
  text-shadow: 0 0 40px rgba(var(--jb-accent-rgb), 0.6);
  margin-bottom: 32px; opacity: 0.85;
}
.loading-title {
  font-family: var(--jb-font-display); font-weight: 900; font-size: clamp(32px, 6vw, 56px);
  letter-spacing: 0.25em; color: #fff; text-transform: uppercase;
  text-shadow: 0 0 40px rgba(0,229,212,0.3);
  margin-bottom: 28px;
}
.loading-progress-wrap {
  width: min(320px, 60vw); height: 1px; background: rgba(255,255,255,0.1);
  position: relative; overflow: hidden;
}
.loading-progress-bar {
  position: absolute; inset: 0 auto 0 0; width: 0%;
  background: linear-gradient(90deg, transparent, var(--jb-accent));
  transition: width 280ms var(--jb-ease);
}
.loading-pct {
  margin-top: 18px; font-family: var(--jb-font-display); font-weight: 700; font-size: 11px;
  letter-spacing: 0.4em; color: var(--jb-text-secondary); text-transform: uppercase;
}

/* ---------- Depth Marker (top center) ---------- */
#depth-marker {
  position: fixed; top: 24px; left: 50%; transform: translateX(-50%);
  font-family: var(--jb-font-display); font-weight: 900;
  font-size: clamp(14px, 1.2vw, 18px); letter-spacing: 0.35em;
  color: var(--jb-accent); text-transform: uppercase;
  text-shadow: 0 0 30px rgba(var(--jb-accent-rgb), 0.55);
  display: flex; gap: 14px; align-items: baseline;
  padding: 10px 20px;
  background: rgba(6,15,18,0.35); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--jb-glass-border);
  border-radius: 999px;
}
#depth-marker .depth-value { font-size: 1.35em; min-width: 5ch; text-align: right; font-variant-numeric: tabular-nums; }
#depth-marker .depth-unit { font-size: 0.7em; opacity: 0.65; }
#depth-marker .depth-label { font-size: 0.7em; opacity: 0.55; border-left: 1px solid rgba(var(--jb-accent-rgb),0.25); padding-left: 12px; }

/* ---------- Surface/Skip button (top right) ---------- */
.chrome-btn {
  position: fixed; top: 24px; right: 24px; z-index: 20;
  font-family: var(--jb-font-display); font-weight: 700;
  font-size: 11px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--jb-accent);
  padding: 10px 18px;
  background: rgba(6,15,18,0.35); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--jb-glass-border);
  border-radius: 999px;
  transition: border-color 280ms var(--jb-ease), box-shadow 280ms var(--jb-ease), transform 220ms var(--jb-ease);
}
.chrome-btn:hover, .chrome-btn:focus-visible {
  border-color: var(--jb-glass-hover-border);
  box-shadow: var(--jb-shadow-glow);
  outline: none;
}

.chrome-btn.btn-bottom-right { top: auto; bottom: 24px; }

/* ---------- Audio toggle (bottom left) ---------- */
#audio-toggle {
  position: fixed; bottom: 24px; left: 24px; z-index: 20;
  width: 42px; height: 42px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: rgba(6,15,18,0.35); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--jb-glass-border);
  color: var(--jb-accent);
  transition: border-color 280ms var(--jb-ease), box-shadow 280ms var(--jb-ease);
}
#audio-toggle:hover, #audio-toggle:focus-visible {
  border-color: var(--jb-glass-hover-border); box-shadow: var(--jb-shadow-glow); outline: none;
}
#audio-toggle svg { width: 18px; height: 18px; stroke: currentColor; fill: none; stroke-width: 1.75; }

/* ---------- Credit line (bottom center) ---------- */
.credit-line {
  position: fixed; bottom: 28px; left: 50%; transform: translateX(-50%);
  font-family: var(--jb-font-body); font-size: 11px; font-weight: 300;
  color: var(--jb-text-muted); letter-spacing: 0.08em;
  font-style: italic; text-align: center; max-width: 80vw;
  opacity: 0.75;
}

/* ---------- Layer Cards ---------- */
.layer-card {
  position: fixed; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: min(860px, 86vw); padding: 48px 48px 40px;
  opacity: 0; pointer-events: none;
  transition: opacity 800ms var(--jb-ease-reveal), transform 800ms var(--jb-ease-reveal);
  text-align: left;
  /* Rev #2 defensive: DOM hero MUST dominate over any baked plate typography until Designer completes plate regen. */
  z-index: 30;
}
/* Rev #2 defensive: crisp DOM hero pinned above the canvas layer. */
.layer-hero { position: relative; z-index: 31; }
.layer-egg {
  display: block; margin-top: 16px; max-width: 44ch; margin-left: auto; margin-right: auto;
  font-family: var(--jb-font-body); font-size: 12px; font-style: italic;
  color: var(--jb-text-muted); letter-spacing: 0.02em; opacity: 0.8;
}
.layer-card.visible {
  opacity: 1; pointer-events: auto;
  transform: translate(-50%, -50%) translateY(0);
}
.layer-card.entering { transform: translate(-50%, -50%) translateY(40px); }
.layer-card.exiting { transform: translate(-50%, -50%) translateY(-40px); opacity: 0; }

.layer-meta {
  display: flex; align-items: baseline; gap: 20px;
  font-family: var(--jb-font-display); font-weight: 800;
  font-size: 11px; letter-spacing: 0.4em; text-transform: uppercase;
  color: var(--jb-accent); margin-bottom: 20px;
}
.layer-meta .meta-depth { color: var(--jb-text-muted); font-weight: 600; }
.layer-meta .meta-bar { flex: 1; height: 1px; background: linear-gradient(90deg, rgba(var(--jb-accent-rgb),0.4), transparent); }

.layer-hero {
  font-family: var(--jb-font-display); font-weight: 900;
  font-size: clamp(34px, 5.2vw, 64px); line-height: 1.05;
  letter-spacing: -0.01em; text-transform: uppercase;
  margin-bottom: 22px;
}
.layer-hero .line1 { color: var(--jb-text-primary); display: block; font-weight: 800; }
.layer-hero .line2 { color: var(--jb-accent); display: block; text-shadow: 0 0 30px rgba(var(--jb-accent-rgb), 0.35); }
.layer-hero .line2.warm { color: var(--jb-accent-orange); text-shadow: 0 0 30px rgba(240,90,26,0.35); }

.layer-hero .bracket {
  display: inline-block; padding: 0 14px; border: 2px solid var(--jb-accent);
  border-radius: 4px;
}

.layer-body {
  font-family: var(--jb-font-body); font-size: 17px; line-height: 1.65;
  color: var(--jb-text-secondary); max-width: 62ch;
  margin-bottom: 22px;
}
.layer-body em { color: var(--jb-accent); font-style: normal; }

.layer-arabic {
  font-family: var(--jb-font-arabic); font-weight: 600;
  font-size: clamp(18px, 2vw, 24px); direction: rtl;
  color: rgba(var(--jb-accent-rgb), 0.75);
  letter-spacing: 0.02em; margin-top: 10px;
  text-shadow: 0 0 20px rgba(var(--jb-accent-rgb), 0.25);
}
.layer-arabic.warm { color: rgba(240,90,26,0.75); text-shadow: 0 0 20px rgba(240,90,26,0.3); }

.layer-egg {
  display: block; margin-top: 14px; max-width: 46ch;
  font-family: var(--jb-font-body); font-size: 12px; font-style: italic;
  color: var(--jb-text-muted); letter-spacing: 0.02em; line-height: 1.5;
  opacity: 0.6; transition: opacity 0.6s var(--jb-ease);
}
.layer-egg:hover { opacity: 1; }
.layer-egg em { color: var(--jb-accent); font-style: italic; }

.layer-sub {
  font-family: var(--jb-font-display); font-weight: 600;
  font-size: 13px; letter-spacing: 0.25em; text-transform: uppercase;
  color: var(--jb-text-secondary); margin-bottom: 18px;
}

.layer-micro {
  font-family: var(--jb-font-body); font-size: 13px; font-style: italic;
  color: var(--jb-text-muted); max-width: 42ch; margin-top: 14px;
  text-transform: lowercase; letter-spacing: 0.01em;
}

.continue-hint {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 28px;
  font-family: var(--jb-font-display); font-weight: 700;
  font-size: 11px; letter-spacing: 0.35em; text-transform: uppercase;
  color: var(--jb-accent); opacity: 0.85;
  animation: pulseHint 2.4s ease-in-out infinite;
}
.continue-hint .arrow { display: inline-block; animation: bounceHint 2s ease-in-out infinite; }
@keyframes pulseHint { 50% { opacity: 0.5; } }
@keyframes bounceHint {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(5px); }
}

/* ---------- Surface (L1) special ---------- */
#l1-card { text-align: center; }
#l1-card .layer-meta { justify-content: center; }
#l1-card .layer-hero { text-align: center; }
#l1-card .layer-body { margin-left: auto; margin-right: auto; text-align: center; }
#l1-card .layer-sub { text-align: center; }
#l1-card .layer-arabic { text-align: center; }
#l1-card .l1-controls { margin-top: 36px; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 12px;
  font-family: var(--jb-font-display); font-weight: 800;
  font-size: 13px; letter-spacing: 0.3em; text-transform: uppercase;
  color: var(--jb-bg-deep); background: var(--jb-accent);
  padding: 18px 32px; border-radius: 999px;
  box-shadow: 0 0 40px rgba(var(--jb-accent-rgb), 0.35);
  transition: transform 280ms var(--jb-ease), box-shadow 280ms var(--jb-ease), background 280ms var(--jb-ease);
}
.btn-primary:hover, .btn-primary:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 0 60px rgba(var(--jb-accent-rgb), 0.5);
  background: #22f0e0; outline: none;
}
.btn-primary.warm {
  background: var(--jb-accent-orange); color: #fff;
  box-shadow: 0 0 40px rgba(240,90,26,0.4);
}
.btn-primary.warm:hover { background: #ff6d2a; box-shadow: 0 0 60px rgba(240,90,26,0.55); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--jb-font-display); font-weight: 700;
  font-size: 12px; letter-spacing: 0.28em; text-transform: uppercase;
  color: var(--jb-accent);
  padding: 16px 28px; border-radius: 999px;
  border: 1.5px solid rgba(var(--jb-accent-rgb), 0.35);
  transition: border-color 280ms var(--jb-ease), box-shadow 280ms var(--jb-ease), transform 280ms var(--jb-ease);
}
.btn-ghost:hover, .btn-ghost:focus-visible {
  border-color: var(--jb-accent); box-shadow: var(--jb-shadow-glow);
  transform: translateY(-2px); outline: none;
}

/* ---------- L2 Venture cards (on card-plane) ---------- */
.venture-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px 28px;
  margin-top: 8px;
}
.venture-item { padding: 16px 0; border-top: 1px solid rgba(var(--jb-accent-rgb), 0.12); }
.venture-name { font-family: var(--jb-font-display); font-weight: 900; font-size: 15px; letter-spacing: 0.25em; color: var(--jb-accent); text-transform: uppercase; }
.venture-pitch { font-size: 14px; color: var(--jb-text-secondary); margin-top: 6px; font-style: italic; }
.venture-stat { font-family: var(--jb-font-display); font-weight: 700; font-size: 12px; color: var(--jb-text-primary); margin-top: 6px; letter-spacing: 0.04em; }
.venture-link { display: inline-block; margin-top: 6px; font-size: 11px; color: var(--jb-accent); letter-spacing: 0.2em; text-transform: uppercase; border-bottom: 1px solid rgba(var(--jb-accent-rgb),0.4); }
.venture-link:hover { color: #22f0e0; border-bottom-color: var(--jb-accent); }

/* Per-venture accent tints — mirror the reef colors the user swam past on L2/plane_03 */
.venture-item[data-venture="webspot"]    .venture-name { color: #00e5d4; }
.venture-item[data-venture="photogenic"] .venture-name { color: #c9b78a; }
.venture-item[data-venture="pgpro"]      .venture-name { color: #8fe3d6; }
.venture-item[data-venture="artwist"]    .venture-name { color: #d39a9a; }

/* ---------- L3 Work metrics ---------- */
.work-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px 36px;
  margin-top: 14px;
}
.work-item { padding-top: 16px; border-top: 1px solid rgba(var(--jb-accent-rgb), 0.12); }
.work-metric {
  font-family: var(--jb-font-display); font-weight: 900;
  font-size: clamp(36px, 4.2vw, 56px); line-height: 1;
  color: var(--jb-accent); letter-spacing: -0.02em;
  text-shadow: 0 0 25px rgba(var(--jb-accent-rgb), 0.35);
}
.work-client { font-family: var(--jb-font-display); font-weight: 700; font-size: 12px; letter-spacing: 0.25em; color: var(--jb-text-primary); text-transform: uppercase; margin-top: 8px; }
.work-desc { font-size: 13px; color: var(--jb-text-muted); margin-top: 5px; font-style: italic; }

/* ---------- L4 Brian ---------- */
#l4-card { text-align: center; }
#l4-card .layer-meta { justify-content: center; }
#l4-card .layer-hero { text-align: center; }
.brian-bubble {
  margin-top: 22px;
  padding: 28px 32px;
  background: rgba(var(--jb-accent-rgb), 0.04);
  border: 1px solid rgba(var(--jb-accent-rgb), 0.2);
  border-radius: var(--jb-radius-lg);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 0 60px rgba(var(--jb-accent-rgb), 0.08);
  text-align: left; max-width: 560px;
  /* Rev #8: offset bubble ~40% right so the Three.js Brian column (shifted −20 world-x at L4) sits on the left half of the frame and its pulse is visible. */
  margin-left: auto; margin-right: 0;
  transform: translateX(18%);
}
@media (max-width: 900px) {
  /* On narrow viewports, recentre the bubble — the column offset is handled separately in JS. */
  .brian-bubble { transform: none; margin-left: auto; margin-right: auto; }
}
.brian-typing {
  font-family: var(--jb-font-body); font-style: italic; font-size: 18px; line-height: 1.7;
  color: #fff; text-shadow: 0 0 15px rgba(var(--jb-accent-rgb), 0.3);
  min-height: 300px;
}
.brian-typing .cursor {
  display: inline-block; width: 2px; height: 1em; background: var(--jb-accent);
  vertical-align: text-bottom; margin-left: 3px; animation: blink 1s step-start infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.brian-sign { margin-top: 18px; font-family: var(--jb-font-display); font-weight: 700; font-size: 11px; letter-spacing: 0.35em; text-transform: uppercase; color: var(--jb-accent); }
.brian-stats { margin-top: 22px; font-family: var(--jb-font-display); font-weight: 600; font-size: 10px; letter-spacing: 0.35em; color: var(--jb-text-muted); text-transform: uppercase; }
.brian-controls { margin-top: 22px; display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* ---------- L5 Roots ---------- */
.roots-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 32px;
  margin-top: 18px; align-items: start;
}
.roots-card {
  padding: 20px;
  background: rgba(240, 90, 26, 0.04);
  border: 1px solid rgba(240, 90, 26, 0.18);
  border-radius: var(--jb-radius-lg);
}
.roots-label { font-family: var(--jb-font-display); font-weight: 700; font-size: 10px; letter-spacing: 0.35em; color: var(--jb-accent-orange); text-transform: uppercase; margin-bottom: 10px; }
.roots-body { font-size: 14px; line-height: 1.6; color: var(--jb-text-secondary); }
.roots-body em { color: var(--jb-accent-gold); font-style: italic; }
.roots-names {
  font-family: var(--jb-font-display); font-weight: 900;
  font-size: clamp(20px, 2.4vw, 28px); letter-spacing: 0.15em;
  color: var(--jb-accent-gold); text-shadow: 0 0 25px rgba(245,199,106,0.35);
  margin-top: 14px; text-transform: uppercase;
}
.roots-names-line { margin-top: 6px; font-size: 13px; color: var(--jb-text-muted); font-style: italic; letter-spacing: 0; text-transform: none; }

/* ---------- L6 Core ---------- */
#l6-card { text-align: center; }
#l6-card .layer-meta { justify-content: center; }
#l6-card .layer-hero { text-align: center; }
.core-manifesto {
  font-family: var(--jb-font-body); font-size: 17px; line-height: 1.7;
  color: var(--jb-text-primary); max-width: 62ch; margin: 0 auto 28px;
  text-align: left;
  /* Rev #9: reverential 3-second arrival — first 3s of Core = core sphere + Arabic line only, THEN everything else materializes. */
  opacity: 0; transform: translateY(14px);
  animation: ctaReveal 900ms var(--jb-ease-reveal) 3s forwards;
}
.core-cta-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 20px;
  margin-top: 24px; max-width: 720px; margin-left: auto; margin-right: auto;
}
.core-cta-card {
  padding: 28px;
  background: rgba(var(--jb-accent-rgb), 0.03);
  border: 1px solid rgba(var(--jb-accent-rgb), 0.15);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-radius: var(--jb-radius-lg);
  transition: border-color 320ms var(--jb-ease), transform 320ms var(--jb-ease), box-shadow 320ms var(--jb-ease);
  text-align: left;
  opacity: 0; transform: translateY(20px);
  animation: ctaReveal 900ms var(--jb-ease-reveal) 3s forwards;
}
.core-cta-card:nth-child(2) { animation-delay: 3.2s; }
@keyframes ctaReveal { to { opacity: 1; transform: translateY(0); } }
.core-cta-card:hover { border-color: var(--jb-accent); transform: translateY(-3px); box-shadow: var(--jb-shadow-glow); }
.core-cta-title { font-family: var(--jb-font-display); font-weight: 900; font-size: 18px; letter-spacing: 0.04em; color: var(--jb-accent); text-transform: uppercase; margin-bottom: 10px; }
.core-cta-body { font-size: 13px; color: var(--jb-text-secondary); line-height: 1.55; margin-bottom: 16px; }
.core-cta-action { font-family: var(--jb-font-display); font-weight: 800; font-size: 11px; letter-spacing: 0.3em; color: var(--jb-accent); text-transform: uppercase; border-bottom: 1.5px solid var(--jb-accent); padding-bottom: 2px; }
.core-cta-card textarea {
  width: 100%; min-height: 70px; margin-bottom: 14px;
  background: rgba(0,0,0,0.25); border: 1px solid rgba(var(--jb-accent-rgb), 0.2);
  color: #fff; padding: 10px 12px; border-radius: var(--jb-radius-sm);
  font-family: var(--jb-font-body); font-size: 13px; resize: vertical; outline: none;
}
.core-cta-card textarea:focus { border-color: var(--jb-accent); }

.core-arabic {
  font-family: var(--jb-font-arabic); font-weight: 600;
  font-size: clamp(22px, 2.4vw, 32px); direction: rtl;
  color: var(--jb-accent-gold); text-shadow: 0 0 40px rgba(245,199,106,0.45);
  margin-top: 24px;
}
.core-english-below {
  font-family: var(--jb-font-body); font-size: 14px; font-style: italic;
  color: var(--jb-text-secondary); margin-top: 8px;
}
.core-footer {
  margin-top: 36px;
  font-family: var(--jb-font-display); font-weight: 600; font-size: 10px;
  letter-spacing: 0.35em; color: var(--jb-text-muted); text-transform: uppercase;
  opacity: 0; animation: ctaReveal 900ms var(--jb-ease-reveal) 4s forwards;
}
.core-social { margin-top: 14px; display: flex; gap: 22px; justify-content: center; opacity: 0; animation: ctaReveal 900ms var(--jb-ease-reveal) 4.4s forwards; }
.core-social a { font-family: var(--jb-font-display); font-weight: 700; font-size: 11px; letter-spacing: 0.28em; color: var(--jb-accent); text-transform: uppercase; }
.core-social a:hover { color: #22f0e0; }

/* ---------- First-run gesture hint ---------- */
#gesture-hint {
  position: fixed; left: 50%; bottom: 90px; transform: translateX(-50%);
  font-family: var(--jb-font-display); font-weight: 700; font-size: 11px;
  letter-spacing: 0.3em; color: var(--jb-text-muted); text-transform: uppercase;
  opacity: 0.6; pointer-events: none; z-index: 15;
  animation: fadeInOut 5s ease-in-out;
}
@keyframes fadeInOut { 0% { opacity: 0; } 20% { opacity: 0.6; } 80% { opacity: 0.6; } 100% { opacity: 0; } }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important; animation-iteration-count: 1 !important;
    transition-duration: 0.15s !important; scroll-behavior: auto !important;
  }
  .layer-card { transition: opacity 200ms linear; }
  .brian-typing { min-height: auto; }
}

/* ---------- Mobile ---------- */
@media (max-width: 768px) {
  #depth-marker { top: 12px; padding: 7px 12px; font-size: 10px; letter-spacing: 0.22em; }
  .chrome-btn { top: 12px; right: 12px; padding: 7px 12px; font-size: 10px; }
  .chrome-btn.btn-bottom-right { top: auto; bottom: 84px; right: 12px; }
  #audio-toggle { bottom: 12px; left: 12px; width: 36px; height: 36px; }
  .credit-line { bottom: 70px; font-size: 10px; padding: 0 64px; }
  /* Mobile: cards become scrollable so long content stops overlapping
     fixed chrome (depth marker top, audio/skip/credit bottom). */
  .layer-card {
    padding: 64px 18px 96px; /* room for depth marker + bottom chrome */
    width: 100vw;
    max-height: 100vh;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    top: 0; left: 0;
    transform: translate(0, 0);
  }
  .layer-card.entering, .layer-card.exiting { transform: translate(0, 0); }
  .layer-hero { font-size: clamp(24px, 6.5vw, 36px); margin-bottom: 14px; }
  .layer-body { font-size: 14px; line-height: 1.55; }
  .layer-meta { font-size: 10px; gap: 8px; margin-bottom: 14px; flex-wrap: wrap; }
  .venture-grid, .work-grid, .roots-grid, .core-cta-grid { grid-template-columns: 1fr; gap: 14px; }
  .brian-bubble { padding: 18px; transform: none; margin: 0; max-width: 100%; }
  .brian-typing { font-size: 14px; line-height: 1.55; min-height: auto; }
  .brian-controls { flex-direction: column; gap: 10px; }
  .btn-primary, .btn-ghost { width: 100%; text-align: center; }
  .core-cta-card { padding: 18px; }
  .core-cta-body { font-size: 13px; }
  textarea[name="message"] { width: 100%; min-height: 90px; }
  .core-arabic { font-size: clamp(20px, 6vw, 28px); }
  .core-english-below { font-size: 12px; }
  .core-footer { font-size: 10px; padding: 0 8px; }
  .core-social { flex-wrap: wrap; gap: 12px; }
  .l1-controls { flex-direction: column; gap: 10px; }
  .continue-hint { font-size: 10px; margin-top: 18px; }
}

/* ---------- Vignette over canvas (depth mood) ---------- */
#vignette {
  position: fixed; inset: 0; pointer-events: none; z-index: 5;
  background: radial-gradient(ellipse at center, transparent 50%, rgba(0,0,0,0.55) 100%);
  transition: opacity 1200ms var(--jb-ease);
}

/* ---------- L6 Jonah Arrival Portrait (rev #10) ---------- */
.jonah-portrait {
  position: absolute;
  right: 48px;
  bottom: 48px;
  width: 180px;
  max-width: 25%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 6px;
  border: 1px solid rgba(var(--jb-accent-rgb), 0.25);
  box-shadow: 0 0 40px rgba(var(--jb-accent-rgb), 0.20);
  opacity: 0;
  transform: translateY(8px);
  animation: jonahReveal 900ms var(--jb-ease-reveal) 3.4s forwards;
}
.jonah-caption {
  position: absolute;
  right: 48px;
  bottom: 24px;
  font-family: var(--jb-font-display);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--jb-text-secondary);
  opacity: 0;
  animation: jonahReveal 900ms var(--jb-ease-reveal) 3.6s forwards;
}
@keyframes jonahReveal {
  to { opacity: 1; transform: translateY(0); }
}
@media (max-width: 768px) {
  .jonah-portrait { position: static; width: 120px; margin: 16px auto 8px; display: block; }
  .jonah-caption { position: static; text-align: center; margin-bottom: 12px; }
}