/* ============================================================
   Photonfiction — Spatial & AI Computing (poc02)
   Original styling inspired by the immersive-agency genre.
   Replace colors, type, and content with your own brand.
   ============================================================ */

:root {
  --bg: #ffffff;
  --bg-soft: #f4f5f7;
  --fg: #0d0d0d;
  --muted: #4a4b52; /* ~7.6:1 on white (AAA); was #62636b */
  --accent: #3A4F87;
  --accent-2: #E2623D;
  --line: rgba(0, 0, 0, 0.1);
  --maxw: 1320px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scrollbar-width: none; }
html::-webkit-scrollbar { display: none; }

body {
  background: var(--bg);
  color: var(--fg);
  font-family: "Inter", system-ui, sans-serif;
  font-weight: 300;
  line-height: 1.5;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Lenis */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }

a { color: inherit; text-decoration: none; }
em { font-style: italic; }

/* ---------- Boot sequence ---------- */
.boot {
  position: fixed;
  inset: 0;
  z-index: 2000;
  background: #ffffff;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  padding: clamp(3rem, 8vw, 8rem);
  pointer-events: none;
}
.boot__lines {
  font-family: "Space Grotesk", monospace;
  font-size: clamp(0.75rem, 1.1vw, 0.92rem);
  letter-spacing: 0.12em;
  color: rgba(58, 79, 135, 0.9);
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  margin-bottom: 2.5rem;
}
.boot__line {
  opacity: 0;
  transform: translateX(-8px);
}
.boot__line.is-done { color: rgba(0,0,0,0.6); }
.boot__bar {
  width: clamp(180px, 28vw, 340px);
  height: 2px;
  background: rgba(0,0,0,0.06);
  border-radius: 2px;
  overflow: hidden;
}
.boot__bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, rgba(0,0,0,0.6), rgba(0,0,0,1));
  border-radius: 2px;
}

/* ---------- VR HUD ---------- */
.vr-hud {
  position: fixed;
  inset: 0;
  z-index: 420;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.5s;
  font-family: "Space Grotesk", monospace;
  font-size: 0.62rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.72);
}
.vr-hud.is-visible { opacity: 1; }
.vr-hud__tl {
  position: absolute;
  top: 1.4rem;
  left: clamp(1rem, 3vw, 2rem);
}
.vr-hud__tr {
  position: absolute;
  top: 1.4rem;
  right: clamp(1rem, 3vw, 2rem);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.vr-hud__label { color: rgba(0,0,0,0.62); margin-right: 0.2rem; }
.vr-hud__sep   { color: rgba(0,0,0,0.45); }
.vr-hud__dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: rgba(0,0,0,0.9);
  box-shadow: 0 0 6px rgba(0,0,0,0.8);
  animation: hud-blink 1.4s ease-in-out infinite;
}
@keyframes hud-blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.15; }
}

/* ---------- Cursor trail ---------- */
.cursor-trail span {
  position: fixed;
  top: 0; left: 0;
  width: 3px; height: 3px;
  border-radius: 50%;
  background: rgba(0,0,0,0.55);
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%,-50%);
}

/* ---------- Achievement toast ---------- */
.toast {
  position: fixed;
  bottom: 2.2rem;
  right: 2.2rem;
  z-index: 1500;
  font-family: "Space Grotesk", monospace;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.7);
  background: rgba(255,255,255,0.88);
  border: 1px solid rgba(0,0,0,0.25);
  backdrop-filter: blur(14px);
  padding: 0.8rem 1.4rem;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transform: translateY(8px);
  box-shadow: 0 0 18px rgba(0,0,0,0.12);
}
.toast__label { display: block; color: rgba(0,0,0,0.7); margin-bottom: 0.25rem; font-size: 0.55rem; }

/* ---------- Chapter sub-screen progress bar ---------- */
.vr-proj__scrprog {
  position: absolute;
  right: 1.2rem;
  top: 15%;
  height: 70%;
  width: 2px;
  background: rgba(0,0,0,0.05);
  border-radius: 2px;
  z-index: 10;
  pointer-events: none;
}
.vr-proj__scrprog-fill {
  width: 100%;
  height: 0%;
  background: linear-gradient(to bottom, rgba(var(--proj-accent),0.8), rgba(var(--proj-accent),0.3));
  border-radius: 2px;
  transition: height 0.45s cubic-bezier(0.16,1,0.3,1);
}

/* ---------- Custom cursor ---------- */
* { cursor: none !important; }

/* ---------- VR gaze reticle ---------- */
.vr-reticle {
  position: fixed;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 44px; height: 44px;
  z-index: 450;
  pointer-events: none;
  opacity: 0;
  display: flex; align-items: center; justify-content: center;
  transition: opacity 0.3s;
}
.vr-reticle.is-visible { opacity: 1; }

.vr-reticle__svg {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  transform: rotate(-90deg); /* start arc from top */
}
.vr-reticle__track {
  fill: none;
  stroke: rgba(0,0,0,0.1);
  stroke-width: 1.5;
}
.vr-reticle__arc {
  fill: none;
  stroke: rgba(0,0,0,0.9);
  stroke-width: 1.5;
  stroke-linecap: round;
  stroke-dasharray: 119.4; /* 2π × 19 */
  stroke-dashoffset: 119.4; /* starts empty */
  filter: drop-shadow(0 0 4px rgba(0,0,0,0.7));
  transition: stroke-dashoffset 0.25s ease;
}
.vr-reticle__dot {
  width: 4px; height: 4px;
  border-radius: 50%;
  background: rgba(0,0,0,0.9);
  box-shadow: 0 0 5px rgba(0,0,0,0.6);
  position: relative; z-index: 1;
}
.vr-reticle__label {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%; transform: translateX(-50%);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.7);
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.3s;
}
.vr-reticle.is-visible .vr-reticle__label { opacity: 1; }

.cursor-dot {
  position: fixed;
  top: 0; left: 0;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: #0d0d0d;
  pointer-events: none;
  z-index: 10000;
  transform: translate(-50%, -50%);
  box-shadow: 0 0 6px 2px rgba(0, 0, 0, 0.7);
  transition: opacity 0.2s;
}

.cursor-ring {
  position: fixed;
  top: 0; left: 0;
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1.5px solid rgba(0, 0, 0, 0.85);
  box-shadow: 0 0 16px rgba(0, 0, 0, 0.5), inset 0 0 10px rgba(0, 0, 0, 0.1);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  display: flex; align-items: center; justify-content: center;
  /* size/shape animated by GSAP — no CSS transition needed for those */
  transition: border-color 0.35s, box-shadow 0.35s, background 0.35s;
}
.cursor-ring__label {
  font-family: var(--font-ui);
  font-size: 0.52rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(0, 0, 0, 0.9);
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
  pointer-events: none;
  user-select: none;
}
.cursor-ring.is-hover .cursor-ring__label { opacity: 1; transform: scale(1); }

@media (hover: none) { .cursor-dot, .cursor-ring { display: none; } }

/* Mouse-reactive ink/fluid background (canvas, created in JS) — sits behind the WebGL */
.fluid-bg { position: fixed; inset: 0; z-index: -1; pointer-events: none; }

/* Gravity typography — hero letters that bend toward the cursor */
.hero__title .gchar { display: inline-block; will-change: transform; }
.hero__title .gchar--accent { color: var(--accent-2); font-style: italic; }

/* Divide-by-zero: the logo's 0 is the singularity trigger */
.nav__brand [data-singularity] {
  display: inline-block;
  cursor: pointer;
  transition: text-shadow 0.3s var(--ease), transform 0.3s var(--ease);
}
.nav__brand [data-singularity]:hover { transform: scale(1.12); text-shadow: 0 0 18px var(--accent-2); }
.singularity-flash {
  position: fixed;
  inset: 0;
  z-index: 9997;
  opacity: 0;
  pointer-events: none;
  background: radial-gradient(circle at center, #3A4F87 0%, #E2623D 35%, transparent 72%);
  mix-blend-mode: multiply;
}

/* ---------- Loader ---------- */
.loader {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 9998;
}
/* Animated logo "2 | 0" centered in the loader */
.logo {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  align-items: center;
  gap: 0.02em;
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(4rem, 15vw, 12rem);
  line-height: 1;
  letter-spacing: -0.03em;
}
.logo__g { display: inline-block; }
.logo__text {
  display: inline-block;
  will-change: transform;
  position: relative;
  z-index: 10;
  width: 3em;
  text-align: center;
  flex-shrink: 0;
}
.logo__slash {
  display: inline-block;
  color: var(--accent-2);
  transform-origin: 50% 100%;     /* pivots on its base, so it "falls" over */
  will-change: transform;
  font-size: 0.95em;
  margin: 0 0.12em;               /* small gap; exact contact is computed in JS */
}
.logo__zero {
  display: inline-block;
  will-change: opacity;
  min-width: 3em;
  text-align: center;
}

/* ---------- WebGL canvas ---------- */
.webgl {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  pointer-events: none;
}

main, .nav, .footer { position: relative; z-index: 2; }

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0; left: 0;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem clamp(1.2rem, 4vw, 3.5rem);
  z-index: 100;
  background: #ffffff; /* solid strip — nav/logo never sit on the canvas */
  box-shadow: 0 2px 18px rgba(13, 13, 13, 0.08);
}
.nav__brand { position: relative; display: inline-flex; align-items: center; }
.nav__brand-logo {
  height: 24px; /* PNG is cropped tight to the ring + wordmark */
  width: auto;
  display: block;
}
/* invisible hotspot over the logo ring — the ÷0 singularity easter egg */
.nav__brand-zero { position: absolute; left: 0; top: 0; bottom: 0; width: 16%; cursor: pointer; }
.nav__links { display: flex; gap: 2rem; align-items: center; }
.nav__links a {
  font-size: 0.9rem;
  letter-spacing: 0.02em;
  position: relative;
  padding: 0.2rem 0;
}
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 1px;
  background: currentColor;
  transition: width 0.4s var(--ease);
}
.nav__links a:hover::after { width: 100%; }
.nav__cta {
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 0.5rem 1.2rem !important;
}
.nav__cta::after { display: none; }
.nav__menu { display: none; background: none; border: 0; cursor: pointer; }

/* ---------- Shared ---------- */
.section-tag {
  display: inline-block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1rem;
}
.section-title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: clamp(2.2rem, 6vw, 5rem);
  letter-spacing: -0.03em;
  line-height: 1;
}
section { padding: clamp(5rem, 14vh, 12rem) clamp(1.2rem, 4vw, 3.5rem); }

/* ---------- Hero ---------- */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: var(--maxw);
  margin: 0 auto;
}
.hero__eyebrow {
  font-family: "Space Grotesk", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.85rem;
  color: var(--accent-2);
  margin-bottom: 2rem;
}
.hero__title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: clamp(3rem, 11vw, 10rem);
  line-height: 0.92;
  letter-spacing: -0.04em;
  margin-bottom: 2.5rem;
}
.hero__title .line { display: block; overflow: hidden; }
.hero__title em { color: var(--accent-2); }
.hero__lead {
  max-width: 38ch;
  font-size: clamp(1rem, 1.6vw, 1.3rem);
  color: var(--muted);
  margin-bottom: 2.5rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  padding: 0.9rem 1.6rem;
  font-size: 0.95rem;
  transition: background 0.4s var(--ease), color 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn:hover { background: var(--fg); color: var(--bg); border-color: var(--fg); }
.hero__scroll {
  position: absolute;
  bottom: 2.5rem;
  left: clamp(1.2rem, 4vw, 3.5rem);
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
}
.hero__scroll-line {
  width: 60px; height: 1px;
  background: var(--line);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--accent-2);
  transform-origin: left;
  animation: scrollLine 2s var(--ease) infinite;
}
@keyframes scrollLine {
  0% { transform: scaleX(0); transform-origin: left; }
  50% { transform: scaleX(1); transform-origin: left; }
  51% { transform-origin: right; }
  100% { transform: scaleX(0); transform-origin: right; }
}

/* ---------- Manifesto ---------- */
.manifesto {
  max-width: var(--maxw);
  margin: 0 auto;
}
.manifesto__text {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 400;
  font-size: clamp(1.5rem, 4.2vw, 3.4rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.manifesto__text .word { display: inline-block; }
.manifesto__text .word.is-dim { color: rgba(0, 0, 0, 0.3); transition: color 0.3s var(--ease); }

/* ---------- Capabilities ---------- */
.caps { max-width: var(--maxw); margin: 0 auto; }
.caps__head { margin-bottom: 4rem; }
.caps__list { list-style: none; border-top: 1px solid var(--line); }
.cap {
  display: grid;
  grid-template-columns: 80px 1fr 1.2fr;
  gap: 2rem;
  align-items: start;
  padding: 2.5rem 0;
  border-bottom: 1px solid var(--line);
  transition: padding 0.5s var(--ease);
}
.cap:hover { padding-left: 1.5rem; }
.cap__num { font-family: "Space Grotesk", sans-serif; color: var(--accent-2); font-size: 0.9rem; }
.cap__title { font-family: "Space Grotesk", sans-serif; font-weight: 500; font-size: clamp(1.4rem, 2.6vw, 2.2rem); letter-spacing: -0.02em; }
.cap__desc { color: var(--muted); font-size: 1.05rem; max-width: 48ch; }

/* ---------- Work ---------- */
.work { max-width: var(--maxw); margin: 0 auto; }
.work__head { margin-bottom: 4rem; }
.work__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.5rem, 4vw, 4rem);
}
.project { cursor: pointer; }
.project__media {
  aspect-ratio: 4 / 3;
  border-radius: 14px;
  overflow: hidden;
  position: relative;
  transition: transform 0.6s var(--ease);
}
.project:hover .project__media { transform: scale(0.98); }
.project__media::after {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(120% 120% at 30% 20%, rgba(0,0,0,0.18), transparent 60%);
  mix-blend-mode: overlay;
}
.project__media--1 { background: linear-gradient(135deg, #3A4F87, #C7D0E6); }
.project__media--2 { background: linear-gradient(135deg, #E2623D, #F5D3C6); }
.project__media--3 { background: linear-gradient(135deg, #22315C, #B9C1D9); }
.project__media--4 { background: linear-gradient(135deg, #2B2B2E, #D6D6DA); }
.project__meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-top: 1.2rem;
}
.project__meta h3 { font-family: "Space Grotesk", sans-serif; font-weight: 500; font-size: 1.4rem; letter-spacing: -0.01em; }
.project__meta span { color: var(--muted); font-size: 0.85rem; }

/* ---------- Clients marquee ---------- */
.clients { text-align: center; padding-block: clamp(4rem, 8vh, 7rem); }
.clients__label {
  font-family: "Space Grotesk", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.8rem;
  color: var(--muted);
  margin-bottom: 3rem;
}
.marquee { overflow: hidden; width: 100%; -webkit-mask-image: linear-gradient(90deg, transparent, #fff 12%, #fff 88%, transparent); mask-image: linear-gradient(90deg, transparent, #fff 12%, #fff 88%, transparent); }
.marquee__track {
  display: flex;
  gap: 2.5rem;
  white-space: nowrap;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.5rem, 4vw, 2.6rem);
  letter-spacing: -0.01em;
  will-change: transform;
}
.marquee__track span:nth-child(even) { color: var(--accent-2); }

/* ---------- Contact ---------- */
.contact {
  max-width: var(--maxw);
  margin: 0 auto;
  text-align: center;
}
.contact__title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: clamp(2.4rem, 8vw, 7rem);
  line-height: 1;
  letter-spacing: -0.03em;
  margin: 1rem 0 3rem;
}
.contact__title em { color: var(--accent-2); }
.contact__email {
  font-size: clamp(1.1rem, 2.4vw, 1.8rem);
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.3rem;
  transition: border-color 0.4s var(--ease);
}
.contact__email:hover { border-color: var(--accent-2); }

/* ---------- Footer ---------- */
.footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 2.5rem clamp(1.2rem, 4vw, 3.5rem);
  border-top: 1px solid var(--line);
  font-size: 0.85rem;
  color: var(--muted);
}
.footer__social { display: flex; gap: 1.5rem; }
.footer__social a:hover { color: var(--fg); }

/* ---------- Reveal initial states ---------- */
[data-reveal] { opacity: 0; transform: translateY(30px); }
/* the inner slider inside each .line clip wrapper; GSAP sets/animates yPercent */
[data-reveal-line] { display: inline-block; }
.cap { opacity: 0; transform: translateY(40px); }
.project { opacity: 0; transform: translateY(50px); }

/* ---------- Responsive ---------- */
@media (max-width: 860px) {
  .nav__links { display: none; }
  .nav__menu { display: flex; flex-direction: column; gap: 5px; }
  .nav__menu span { width: 26px; height: 1.5px; background: var(--fg); display: block; }
  .cap { grid-template-columns: 50px 1fr; }
  .cap__desc { grid-column: 1 / -1; }
  .work__grid { grid-template-columns: 1fr; }
  .panel { width: 100%; }
}

/* ============================================================
   Scroll-to-discover indicator
   ============================================================ */
.scroll-discover {
  position: absolute;
  bottom: 2.5rem;
  left: clamp(1.2rem, 4vw, 3.5rem);
  display: flex;
  align-items: center;
  gap: 1rem;
}
.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.scroll-indicator .arrow {
  width: 7px; height: 7px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
}
.scroll-indicator .arrow.top { transform: rotate(45deg); opacity: 0.4; }
.scroll-indicator .arrow.bottom { transform: rotate(45deg); }
.scroll-indicator .line {
  position: relative;
  width: 1px; height: 34px;
  background: var(--line);
  overflow: hidden;
}
.scroll-indicator .line .dot {
  position: absolute;
  top: 0; left: 0;
  width: 1px; height: 10px;
  background: var(--accent-2);
  animation: dotDrop 1.8s var(--ease) infinite;
}
@keyframes dotDrop {
  0% { transform: translateY(-12px); }
  100% { transform: translateY(34px); }
}
.scroll-discover__text {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

/* ============================================================
   Webcam head-tracking control
   ============================================================ */
.track-fab {
  position: fixed;
  right: clamp(1.2rem, 4vw, 2.2rem);
  bottom: clamp(1.2rem, 4vw, 2.2rem);
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  color: var(--fg);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}
.track-fab:hover { border-color: var(--muted); }
.track-fab.is-on { border-color: var(--accent-2); color: var(--accent-2); }
.track-preview {
  position: fixed;
  right: clamp(1.2rem, 4vw, 2.2rem);
  bottom: calc(clamp(1.2rem, 4vw, 2.2rem) + 3.4rem);
  z-index: 200;
  width: 150px;
  aspect-ratio: 4 / 3;
  border-radius: 10px;
  overflow: hidden;
  border: 1px solid var(--line);
  opacity: 0;
  transform: translateY(10px) scale(0.95);
  pointer-events: none;
  transition: opacity 0.4s var(--ease), transform 0.4s var(--ease);
}
.track-preview.is-on { opacity: 1; transform: translateY(0) scale(1); }
.track-preview video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.track-status {
  position: fixed;
  right: clamp(1.2rem, 4vw, 2.2rem);
  bottom: calc(clamp(1.2rem, 4vw, 2.2rem) + 3rem);
  z-index: 199;
  font-size: 0.78rem;
  color: var(--muted);
  text-align: right;
  pointer-events: none;
  max-width: 220px;
}
.track-preview.is-on ~ .track-status { display: none; }

/* ============================================================
   Sliding project panels
   ============================================================ */
.panel-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(2px);
  z-index: 300;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease);
}
.panel-overlay.is-open { opacity: 1; pointer-events: auto; }

.panel {
  position: fixed;
  top: 0; right: 0;
  width: min(620px, 92vw);
  height: 100%;
  z-index: 301;
  background: var(--bg-soft);
  overflow: hidden;
  transform: translateX(100%);
  transition: transform 0.8s var(--ease);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}
.panel.is-open { transform: translateX(0); }

.panel__bg { position: absolute; inset: 0; background-size: 200% 200%; animation: panelShift 12s ease infinite; }
.panel__bg--1 { background-image: linear-gradient(135deg, #3A4F87, #C7D0E6, #3A4F87); }
.panel__bg--2 { background-image: linear-gradient(135deg, #E2623D, #F5D3C6, #E2623D); }
.panel__bg--3 { background-image: linear-gradient(135deg, #22315C, #B9C1D9, #22315C); }
.panel__bg--4 { background-image: linear-gradient(135deg, #2B2B2E, #D6D6DA, #2B2B2E); }
@keyframes panelShift {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}
/* Video plays on top of the gradient when /assets file exists; otherwise stays transparent */
.panel__video {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  background: transparent;
}
.panel__content {
  position: relative;
  z-index: 2;
  padding: clamp(2rem, 5vw, 4rem);
  background: linear-gradient(to top, rgba(255,255,255,0.92), rgba(255,255,255,0.2) 70%, transparent);
}
.panel__sub {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.panel__title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: clamp(2rem, 5vw, 3.4rem);
  letter-spacing: -0.02em;
  line-height: 1;
  margin: 0.8rem 0 1rem;
}
.panel__txt { color: var(--muted); max-width: 46ch; font-size: 1.05rem; }
.panel__close {
  position: absolute;
  top: 1.6rem; right: 1.6rem;
  z-index: 3;
  width: 44px; height: 44px;
  border-radius: 50%;
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.5);
  backdrop-filter: blur(8px);
  color: var(--fg);
  font-size: 1rem;
  cursor: pointer;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}
.panel__close:hover { background: var(--fg); color: var(--bg); transform: rotate(90deg); }

/* ============================================================
   VR — gate section, binocular mask, VR-mode UI
   --vr (0→1) is set by main.js from scroll progress
   ============================================================ */
:root { --vr: 0; }

.vr-gate {
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.vr-gate__prompt {
  /* fade the prompt out as the headset comes down */
  opacity: calc(1 - var(--vr) * 1.6);
  transform: translateY(calc(var(--vr) * -20px));
}
.vr-gate__title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 500;
  font-size: clamp(2.4rem, 7vw, 6rem);
  letter-spacing: -0.03em;
  line-height: 1;
  margin: 0.6rem 0 1rem;
}
.vr-gate__hint { color: var(--muted); font-size: 1rem; letter-spacing: 0.04em; }

/* Binocular lens mask: black overlay with two transparent lens holes.
   Composited so the scene shows through where EITHER lens is. */
.vr-mask {
  position: fixed;
  inset: 0;
  z-index: 150;
  background: #ffffff;
  pointer-events: none;
  opacity: clamp(0, calc((var(--vr) - 0.12) * 1.5), 1);
  transform: scale(calc(1.45 - 0.45 * var(--vr)));
  transition: opacity 0.15s linear, transform 0.15s linear;
  -webkit-mask-image:
    radial-gradient(circle at 33% 50%, transparent 26%, #fff 30%),
    radial-gradient(circle at 67% 50%, transparent 26%, #fff 30%);
  mask-image:
    radial-gradient(circle at 33% 50%, transparent 26%, #fff 30%),
    radial-gradient(circle at 67% 50%, transparent 26%, #fff 30%);
  -webkit-mask-composite: source-in;          /* intersect (Safari/Chrome) */
  mask-composite: intersect;
}

/* In full VR mode the goggle frame stays on and the world shows through */
body.vr-mode .vr-mask { opacity: 1; transform: scale(1); }

/* Hide the normal page content while inside VR */
body.vr-mode main,
body.vr-mode .nav,
body.vr-mode .footer,
body.vr-mode .track-fab,
body.vr-mode .track-preview { opacity: 0; pointer-events: none; transition: opacity 0.4s var(--ease); }

/* VR HUD + take-off button */
.vr-ui {
  position: fixed;
  inset: 0;
  z-index: 200;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.6s var(--ease);
}
body.vr-mode .vr-ui { opacity: 1; }
.vr-ui__hud {
  position: absolute;
  top: 2rem; left: 50%;
  transform: translateX(-50%);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent-2);
}
.vr-ui__off {
  position: absolute;
  bottom: 2.2rem; left: 50%;
  transform: translateX(-50%);
  pointer-events: auto;
  padding: 0.8rem 1.4rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.5);
  backdrop-filter: blur(10px);
  color: var(--fg);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.85rem;
  cursor: pointer;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}
.vr-ui__off:hover { background: var(--fg); color: var(--bg); }

/* ============================================================
   Polish: grain, progress bar, sound toggle, split-text, tilt
   ============================================================ */

/* Film grain / noise overlay */
.grain {
  position: fixed;
  inset: -50%;
  width: 200%;
  height: 200%;
  z-index: 9000;
  pointer-events: none;
  opacity: 0.06;
  mix-blend-mode: overlay;
  background-size: 200px 200px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='200'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  animation: grainShift 0.6s steps(6) infinite;
}
@keyframes grainShift {
  0% { transform: translate(0, 0); }
  20% { transform: translate(-5%, 5%); }
  40% { transform: translate(3%, -4%); }
  60% { transform: translate(-4%, 2%); }
  80% { transform: translate(5%, 3%); }
  100% { transform: translate(0, 0); }
}

/* Scroll progress bar */
.progress {
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: var(--accent-2);
  transform: scaleX(0);
  transform-origin: left;
  z-index: 9500;
  pointer-events: none;
}

/* Sound toggle (bottom-left) */
.sound-toggle {
  position: fixed;
  left: clamp(1.2rem, 4vw, 2.2rem);
  bottom: clamp(1.2rem, 4vw, 2.2rem);
  z-index: 200;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.7rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(10px);
  color: var(--fg);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}
.sound-toggle.is-on { border-color: var(--accent-2); color: var(--accent-2); }
.sound-toggle__bars { display: inline-flex; align-items: flex-end; gap: 2px; height: 14px; }
.sound-toggle__bars i { width: 2px; height: 4px; background: currentColor; }
.sound-toggle.is-on .sound-toggle__bars i { animation: eq 0.8s ease-in-out infinite; }
.sound-toggle__bars i:nth-child(2) { animation-delay: 0.15s; }
.sound-toggle__bars i:nth-child(3) { animation-delay: 0.3s; }
.sound-toggle__bars i:nth-child(4) { animation-delay: 0.45s; }
@keyframes eq { 0%, 100% { height: 4px; } 50% { height: 14px; } }
body.vr-mode .sound-toggle { opacity: 0; pointer-events: none; transition: opacity 0.4s var(--ease); }

/* Gesture reticle (VR hand-tracking) */
.reticle {
  position: fixed;
  top: 0; left: 0;
  width: 44px; height: 44px;
  border: 2px solid var(--fg);
  border-radius: 50%;
  z-index: 210;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.25s var(--ease), width 0.2s var(--ease), height 0.2s var(--ease), border-color 0.2s var(--ease);
  will-change: transform;
}
.reticle::after {
  content: "";
  position: absolute;
  inset: 50%;
  width: 4px; height: 4px;
  margin: -2px;
  border-radius: 50%;
  background: var(--fg);
}
.reticle.is-on { opacity: 0.9; }
.reticle.is-hot { width: 64px; height: 64px; border-color: var(--accent-2); }
.reticle.is-hot::after { background: var(--accent-2); }

/* Split-text characters */
.char { display: inline-block; will-change: transform; }

/* Project card 3D tilt */
.project { perspective: 900px; }
.project__media { transform-style: preserve-3d; will-change: transform; }

/* ---------- Accessibility: reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  .grain { animation: none; }
  [data-reveal], [data-reveal-line], [data-split], .cap, .project { opacity: 1 !important; transform: none !important; }
}

/* ============================================================
   VR warp-speed overlay
   ============================================================ */
.vr-warp {
  position: fixed;
  inset: 0;
  z-index: 450;
  pointer-events: none;
  opacity: 0;
  visibility: hidden;
}
.vr-warp.is-active { visibility: visible; }
.vr-warp__canvas {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
}
/* edge vignette that tightens as speed increases */
.vr-warp__tunnel {
  position: absolute;
  inset: 0;
  background: radial-gradient(
    ellipse at center,
    transparent 0%,
    transparent 10%,
    rgba(255,255,255,0.2)  32%,
    rgba(255,255,255,0.72) 58%,
    #ffffff           76%
  );
  opacity: 0;
  pointer-events: none;
  will-change: transform, opacity;
}
/* project-coloured lens flare (tint set by JS) */
.vr-warp__flare {
  position: absolute;
  inset: 0;
  opacity: 0;
  mix-blend-mode: multiply;
  pointer-events: none;
  will-change: opacity;
}

/* ============================================================
   VR Project immersive view
   ============================================================ */
/* ── VR Project immersive view ─────────────────────────────── */
.vr-proj {
  position: fixed;
  inset: 0;
  z-index: 400;
  background: #ffffff;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
  overflow: hidden;
  --proj-accent: 220, 220, 220;
}
.vr-proj.is-open { opacity: 1; pointer-events: auto; visibility: visible; }

.vr-proj__glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(ellipse 130% 55% at 50% -8%, rgba(var(--proj-accent), 0.1) 0%, transparent 65%);
}

.vr-proj__flash {
  position: absolute;
  inset: 0;
  z-index: 10;
  background: #0d0d0d;
  opacity: 0;
  pointer-events: none;
}

/* ── sheet: chapters laid out in a row; GSAP translates to reveal each ── */
.vr-proj__sheet {
  position: absolute;
  top: 0; left: 0;
  height: 100%;
  display: flex;
  flex-direction: row;
  will-change: transform;
  z-index: 1;
}

/* ── chapter: full viewport wide, internally snap-scrolls vertically ── */
.vr-proj__chapter {
  width: 100vw;
  height: 100%;
  flex-shrink: 0;
  overflow-y: auto;
  overflow-x: hidden;
  scroll-snap-type: y mandatory;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}
.vr-proj__chapter::-webkit-scrollbar { display: none; }

/* ── screen: one viewport tall, snap target ─────────────────── */
.vr-proj__screen {
  width: 100%;
  height: 100%;
  scroll-snap-align: start;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-sizing: border-box;
}

/* thin accent rule between screens in the same chapter */
.vr-proj__screen + .vr-proj__screen::before {
  content: "";
  position: absolute;
  top: 0; left: 8%; width: 84%;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(var(--proj-accent), 0.15), transparent);
}

/* ── screen: hero (split title + art) ───────────────────────── */
.vr-proj__screen--hero {
  flex-direction: row;
  align-items: stretch;
  justify-content: flex-start;
  padding: 0;
}

/* ── screen: tagline ─────────────────────────────────────────── */
.vr-proj__screen--tagline {
  padding: clamp(5rem, 8vw, 9rem) clamp(3.5rem, 8vw, 9rem);
  justify-content: center;
  align-items: flex-start;
}

/* ── screen: stat ────────────────────────────────────────────── */
.vr-proj__screen--stat {
  padding: clamp(5rem, 8vw, 8rem) clamp(3.5rem, 8vw, 9rem);
  justify-content: center;
}

/* ── screen: meta ────────────────────────────────────────────── */
.vr-proj__screen--meta {
  padding: clamp(5rem, 8vw, 8rem) clamp(3.5rem, 8vw, 9rem);
  justify-content: center;
}

/* ── screen: lede ────────────────────────────────────────────── */
.vr-proj__screen--lede {
  padding: clamp(5rem, 8vw, 8rem) clamp(3.5rem, 8vw, 9rem);
  justify-content: center;
}

/* ── screen: body ────────────────────────────────────────────── */
.vr-proj__screen--body {
  padding: clamp(5rem, 8vw, 8rem) clamp(3.5rem, 8vw, 9rem);
  justify-content: center;
  gap: 2.5rem;
}

/* ── screen: breakdown ───────────────────────────────────────── */
.vr-proj__screen--breakdown {
  padding: clamp(4rem, 7vw, 7rem) clamp(3.5rem, 8vw, 9rem);
  justify-content: center;
  gap: 3rem;
}

/* ── decorative elements ─────────────────────────────────────── */
.vr-proj__deco {
  position: absolute;
  right: -0.04em;
  top: 50%;
  transform: translateY(-50%);
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(18rem, 30vw, 40rem);
  line-height: 1;
  letter-spacing: -0.06em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(var(--proj-accent), 0.07);
  user-select: none;
  pointer-events: none;
}

/* ── ch1 content ─────────────────────────────────────────────── */
.vr-proj__panel-content {
  flex: 0 0 52%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(5rem, 8vw, 8rem) 2.5rem clamp(5rem, 8vw, 8rem) clamp(3.5rem, 8vw, 9rem);
  position: relative;
  z-index: 1;
}

.vr-proj__num {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(var(--proj-accent), 1);
  margin-bottom: 1.1rem;
}

.vr-proj__title {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(2.6rem, 5.5vw, 5rem);
  letter-spacing: -0.04em;
  line-height: 1;
  margin: 0 0 1.8rem;
  max-width: 16ch;
  background: linear-gradient(135deg, #0d0d0d 35%, rgba(var(--proj-accent), 0.85) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.vr-proj__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 2.2rem;
}

.vr-proj__tag {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.35rem 1rem;
  border: 1px solid rgba(var(--proj-accent), 0.22);
  border-radius: 100px;
  color: rgba(var(--proj-accent), 0.65);
  background: rgba(var(--proj-accent), 0.05);
}

.vr-proj__desc {
  color: rgba(0,0,0,0.68);
  font-size: clamp(0.95rem, 1.3vw, 1.12rem);
  line-height: 1.75;
  max-width: 52ch;
}

.vr-proj__art-wrap {
  flex: 1;
  position: relative;
  overflow: hidden;
}
.vr-proj__art-wrap::before {
  content: "";
  position: absolute;
  left: 0; top: 10%; height: 80%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, rgba(var(--proj-accent), 0.12), transparent);
  z-index: 1;
}
.vr-proj__art {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
}

/* ── ch1 screen 2: tagline ───────────────────────────────────── */
.vr-proj__tagline {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 700;
  font-size: clamp(2.4rem, 5.5vw, 5rem);
  letter-spacing: -0.04em;
  line-height: 1.1;
  max-width: 22ch;
  margin: 0;
  background: linear-gradient(135deg, #0d0d0d 25%, rgba(var(--proj-accent), 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── ch2 screen 1: stat ──────────────────────────────────────── */
.vr-proj__stat { }

.vr-proj__stat-num {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(5.5rem, 16vw, 13rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
  background: linear-gradient(135deg, #0d0d0d 30%, rgba(var(--proj-accent), 0.9) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}

.vr-proj__stat-label {
  display: block;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.75rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.62);
}

/* ── ch2 screen 2: meta grid ─────────────────────────────────── */
.vr-proj__meta {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  max-width: 72ch;
}
.vr-proj__meta > div {
  display: grid;
  grid-template-columns: 14ch 1fr;
  align-items: baseline;
  padding: 2.2rem 0;
  border-bottom: 1px solid rgba(0,0,0,0.055);
}
.vr-proj__meta > div:first-child { border-top: 1px solid rgba(0,0,0,0.055); }
.vr-proj__meta dt {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.68rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.62);
}
.vr-proj__meta dd {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.6rem, 3vw, 2.8rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.1;
  color: var(--fg);
}

/* ── ch3 screen 1: lede ──────────────────────────────────────── */
.vr-proj__lede {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.35rem, 2.4vw, 2rem);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.45;
  color: rgba(0,0,0,0.92);
  max-width: 44ch;
  margin: 0;
}

/* ── ch3 screen 2: body + process ───────────────────────────── */
.vr-proj__body {
  color: rgba(0,0,0,0.72);
  font-size: clamp(0.9rem, 1.2vw, 1.05rem);
  line-height: 1.85;
  max-width: 62ch;
  margin: 0;
}

.vr-proj__process {
  color: rgba(0,0,0,0.62);
  font-size: clamp(0.78rem, 1vw, 0.9rem);
  line-height: 1.8;
  max-width: 62ch;
  margin: 0;
  padding-top: 2rem;
  border-top: 1px solid rgba(var(--proj-accent), 0.1);
}

/* ── ch4: breakdown grid ─────────────────────────────────────── */
.vr-proj__breakdown-head {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.65rem;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: rgba(var(--proj-accent), 0.75);
  margin: 0;
}

.vr-proj__breakdown {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(var(--proj-accent), 0.1);
  border: 1px solid rgba(var(--proj-accent), 0.1);
}

.vr-proj__breakdown-item {
  background: #ffffff;
  padding: clamp(2rem, 3.5vw, 3.5rem) clamp(1.5rem, 2.5vw, 2.5rem);
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
  transition: background 0.25s;
}
.vr-proj__breakdown-item:hover { background: rgba(var(--proj-accent), 0.04); }

.vr-proj__breakdown-label {
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.62rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: rgba(var(--proj-accent), 0.7);
}

.vr-proj__breakdown-text {
  color: rgba(0,0,0,0.68);
  font-size: clamp(0.88rem, 1.15vw, 1rem);
  line-height: 1.75;
  margin: 0;
}

/* ── chapter/screen scroll hints ────────────────────────────── */
.vr-proj__ch-hint {
  position: absolute;
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.58rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: rgba(0,0,0,0.45);
  pointer-events: none;
}
.vr-proj__ch-hint--down {
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
}
.vr-proj__ch-hint--down::after { content: "↓"; font-size: 0.8rem; }
.vr-proj__ch-hint--next {
  bottom: 2rem;
  right: 2.5rem;
}
.vr-proj__ch-hint--next::after { content: " →"; }

/* ── chapter pips ────────────────────────────────────────────── */
.vr-proj__pips {
  position: absolute;
  bottom: 1.8rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 5px;
  z-index: 5;
  pointer-events: none;
}
.vr-proj__pip {
  width: 18px;
  height: 2px;
  background: rgba(0,0,0,0.1);
  border-radius: 2px;
  transition: background 0.35s, width 0.35s;
}
.vr-proj__pip.is-active {
  width: 36px;
  background: rgba(var(--proj-accent), 0.85);
}

/* ── back button ─────────────────────────────────────────────── */
.vr-proj__back {
  position: absolute;
  top: clamp(1rem, 2.5vw, 1.6rem);
  left: clamp(1rem, 3vw, 1.8rem);
  z-index: 20;
  padding: 0.55rem 1.3rem;
  border: 1px solid rgba(0,0,0,0.12);
  border-radius: 100px;
  background: rgba(255,255,255,0.75);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: rgba(0,0,0,0.6);
  font-family: "Space Grotesk", sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: border-color 0.25s, color 0.25s, background 0.25s;
}
.vr-proj__back:hover {
  border-color: rgba(var(--proj-accent), 0.45);
  color: #0d0d0d;
  background: rgba(var(--proj-accent), 0.08);
}

@media (max-width: 700px) {
  .vr-proj__breakdown { grid-template-columns: 1fr; }
  .vr-proj__screen--hero { flex-direction: column; }
  .vr-proj__panel-content { flex: none; }
  .vr-proj__art-wrap { flex: 1; min-height: 35vh; }
}

/* ---------- Fallback: no WebGL ---------- */
body.no-webgl { background: radial-gradient(circle at 30% 18%, #C7D0E6, #ffffff 60%); }
body.no-webgl .webgl,
body.no-webgl #vr-gate,
body.no-webgl .track-fab,
body.no-webgl .track-preview { display: none; }